JPH04242157A - Product inspecting apparatus - Google Patents

Abstract

PURPOSE:To detect foreign matters which is mixed in and attached to a product and to improve inspection accuracy by emitting near infrared rays from the upper-surface side or rear surface side of the product under inspection, and judging whether the transmitted light signal from the transmitted near infrared rays satisfies a preset value or not. CONSTITUTION:An infrared-ray emitting device 32A is disposed near the upper surface side or the rear surface side of a product under inspection and applys near infrared rays to the product under inspection from the upper-surface side or the rear-surface side. A sensor 32 is disposed near the rear-surface side or upper-surface side of the product under inspection, receives the near infrared rays transmitted through the produce under inspection and outputs the result of the received light as a transmitted signal P3. The input terminal of a foreign- matter detecting-signal generating circuit 241 is connected to the output terminal of the sensor 32. Whether the signal P3 reaches a preset value or not is judged. Only when the signal P3 does not reach the preset value, a high-level state is obtained. A foreign-matter detection signal V3 which indicates the fact that the foreign matter is mixed in or attached to the product under inspection is generated.

Description

DETAILED DESCRIPTION OF THE INVENTION [0001] [0002] [Industrial Application Field] The present invention relates to
If there is foreign matter mixed in or attached to the item being inspected,
In particular, regarding an article inspection device for inspecting whether or not
(i) Obtained by passing the inspected article through near-infrared light.
The low-level state of the transmitted light signal is counted and mixed into the inspected item.
Count the foreign objects that have entered or adhered to the
By generating a foreign object detection signal when the
Removal of inspected items or calculation of defective rate of inspected items, etc.
This is related to article inspection equipment that will become available in
, and (ii) (a) passing through the inspected article in near-infrared light;
At least count the low level state of the transmitted light signal obtained.
Count the foreign substances mixed in or attached to the inspected item, and calculate the count result.
Generates a foreign object detection signal when the result exceeds a predetermined value, and (
b) From at least one of the front and back sides of the item to be inspected.
The three primary color signals extracted from the image signals obtained by
at least one of a luminance signal and a relative chromaticity signal based on
and feed it to the counting circuit to calculate the luminance signal and relative chromaticity signal.
The high level state of at least one of the
Count the foreign substances mixed in or attached to the product, and check the count results.
By generating a foreign object detection signal when a fixed value is exceeded,
Removing defective inspected items or reducing the defective rate of inspected items
Regarding article inspection equipment that can be used for calculations etc.
(iii) (a) The item to be inspected is
Low level of transmitted light signal obtained by passing through infrared light
Count the condition and check for foreign substances mixed in or attached to the inspected item.
Counts the object and sends a foreign object detection signal when the counting result exceeds a predetermined value.
and (b) small amounts on the front and back surfaces of the inspected item.
Each image signal is extracted from at least one image signal.
Create a relative chromaticity signal based on the three primary color signals, and
Remove the relative chromaticity signal corresponding to the largest of the primary color signals.
The other relative chromaticity signals removed are added together at a predetermined ratio.
Create a relative chromaticity sum signal and use the high-level state of the relative chromaticity sum signal
A counting circuit counts the amount of particles that have contaminated or adhered to the inspected item.
When the number of foreign objects is counted and the counting result exceeds the specified value.
Detects defective inspected items by generating a foreign object detection signal.
It can be used for removing objects or calculating the defective rate of inspected items.
The present invention relates to an article inspection device that functions as a functional item. [0003] Conventionally, as this type of article inspection device,
The article to be inspected (for example,
One side (i.e., the surface) of seaweed) is captured by the article imaging unit.
By processing the image signals obtained by imaging, the
Detects defects that occur on the edges of products and determines their quality.
The defective items to be inspected are removed from the defective items attached to the item transport section.
It was proposed that the product be removed by a product removal section (JP-A-Sho).
63-193042). [Problems to be solved] However, conventional article inspection equipment
At the equipment, only defects occurring on the edges of the inspected item are detected.
(i) Object to be inspected
Contaminated inside the product or attached to the front or back surface of the product
Foreign matter (for example, small shrimp, if the item to be inspected is seaweed)
(such as net waste or straw waste) cannot be detected.
There are shortcomings, and even (ii) foreign matter contamination or adhesion.
It has the disadvantage of not being able to remove defective inspected items, and
(iii) Objects to be inspected for contamination or adhesion of foreign substances
There was also the drawback that it was not possible to calculate the defective rate of products. As a result, in the conventional article inspection apparatus, (i
v) There are defects that do not allow sufficient improvement of the quality of the inspected article.
Therefore, (v) If we were to reliably detect these foreign objects,
If you try to
There was no effective way out. [0006] Therefore, the present invention aims to eliminate these drawbacks.
(i) passing the article to be inspected through near-infrared light;
The low-level state of the obtained transmitted light signal is counted and detected.
Count the foreign substances mixed in or attached to the product, and the counting results are set as specified.
By generating a foreign object detection signal when the value exceeds the
Removal of good inspected items or calculation of defective rate of inspected items
Items related to goods inspection equipment that can be used for inspection, etc.
(ii) (a) The article to be inspected is subjected to near-infrared radiation.
The low-level state of the transmitted light signal obtained by passing through the
Count the foreign substances mixed in or attached to the inspected item,
Generates a foreign object detection signal when the counting result exceeds a predetermined value,
and (b) at least the front and back surfaces of the article to be inspected.
Mihara extracted from the image signal obtained from one side.
At least a luminance signal and a relative chromaticity signal based on the color signal.
Also create one and feed it to the counting circuit to calculate the luminance signal and the relative
The high level state of at least one of the chromaticity signals is counted and
Count the foreign substances mixed in or attached to the inspection item, and calculate the count result.
A foreign object detection signal is generated when the result exceeds a predetermined value.
Removal of defective inspected articles or defective inspected articles.
Regarding article inspection equipment that can be used for calculating yield, etc.
(iii) (a) Object to be inspected;
The low transmitted light signal obtained by passing the product through near infrared light
The level status is counted to find out if the product is contaminated or adhered to the inspected item.
Foreign objects are counted and detected when the counting result exceeds a predetermined value.
(b) the front and back sides of the article to be inspected;
each from an image signal obtained from at least one of the surfaces.
Create a relative chromaticity signal based on the extracted three primary color signals,
and the relative chromaticity signal corresponding to the largest of the three primary color signals.
The other relative chromaticity signals excluding the signal are added together at a predetermined ratio.
The high level of the relative chromaticity sum signal is calculated by calculating the relative chromaticity sum signal.
The state of the bell is counted by a counting circuit to ensure that it does not get mixed into the inspected item.
Count the number of attached foreign objects, and if the counting result exceeds the specified value.
By generating a foreign object detection signal when
For removing inspected items or calculating the defective rate of inspected items, etc.
We aim to provide article inspection equipment that will become available.
It is. [0007] Structure of the Invention [Means for Solving the Problem] The solution to the problem provided by the present invention is as follows.
The first solution is to prevent foreign objects from entering the inspected article being transported by the article transport section.
Inspection of goods by inspecting whether or not it is mixed or attached.
(a) At a distance on the front or back side of the item to be inspected,
placed on the front or back side of the item being inspected.
Infrared irradiator (32A) for irradiating near infrared rays from the side
) and (b) on the back side or front side of the item to be inspected.
near infrared light transmitted through the inspected item.
It receives the light beam and outputs the light reception result as a transmitted light signal P3.
(c) The input end is connected to the output end of the sensor (32).
and whether the transmitted light signal P3 is less than the set value.
When the transmitted light signal P3 is less than the set value
The level is high only when the object is inspected to ensure that foreign matter is not mixed into the item being inspected.
Generates foreign object detection signal V3 indicating that there is a foreign object attached.
1. A foreign object detection signal generation circuit (241) for detecting foreign matter. A second solution to the problem provided by the present invention
The determining means is to
Processes the image signal obtained by capturing an image of the article using the article imaging unit
Check whether foreign matter is attached to the inspected item by
In an article inspection device that inspects (a)
Three primary color signals are obtained from the image signal P1 obtained from the surface of the article.
First three primary color signal extraction circuit for extracting R, G, B
(41) and (b) the output terminal of the first three primary color signal extraction circuit (41).
The input end is connected to the first three primary color signals.
From the three primary color signals R, G, B given from the circuit (41)
A first luminance signal creation circuit for creating the luminance signal Y (
42) and (c) the first luminance signal generation circuit (42).
The input end is connected to the output end, and the brightness signal Y is
It is determined whether the brightness signal Y exceeds the set value and the brightness signal Y exceeds the set value.
The brightness comparison signal Y+ becomes high level only when it exceeds
(d) input to the output terminal of the first comparison circuit (43);
The ends are connected, and the high voltage included in the brightness comparison signal Y+
on the surface of the inspected item by counting the level status.
First counting circuit (48) for counting attached foreign matter
and (e) for the output terminal of the first counting circuit (48).
The input terminal is connected to the first counting circuit (48).
When the numerical result exceeds a predetermined value, there is a foreign object on the surface of the item to be inspected.
A first foreign object detection signal V1 indicating that the object is attached is emitted.
(f) an image signal P2 obtained from the back side of the article to be inspected;
The second three primary color signals for extracting the three primary color signals R, G, B from
Outputs of the color signal extraction circuit (141) and (g) the second three primary color signal extraction circuit (141)
The input end is connected to the end, and the second three primary color signals are
Three primary color signals R and G given from the extraction circuit (141)
, B to create a luminance signal Y from
(142) and (h) second luminance signal generation circuit.
The input end is connected to the output end of the circuit (142).
The brightness is determined by determining whether the brightness signal Y exceeds the set value.
High level state occurs only when signal Y exceeds the set value
A second comparison circuit (
143) and (i) for the output terminal of the second comparator circuit (143)
The input terminal is connected and included in the brightness comparison signal Y+.
The backside of the inspected item is determined by counting high level conditions.
A second counting circuit (1
48) and (j) the output of the second counting circuit (148)
The input end is connected to the power end, and the second counting circuit
(148) When the counting result exceeds the specified value, the object to be inspected
A second foreign object inspection that indicates that there is a foreign object on the back side of the product.
Second foreign object detection signal generation time for generating output signal V2
(149) and (k) the surface side of the article to be inspected or
are placed at a distance on the back side, and
Red for irradiating near infrared rays from the front or back side
External irradiator (32A) and (l) back side of the item to be inspected
They are placed spaced apart on the side or surface side of the object to be inspected.
Receives the near infrared rays that have passed through the product and converts the reception result into a transmitted light signal.
(m) The input end is connected to the output end of the sensor (32) for outputting as P3.
and whether the transmitted light signal P3 is less than the set value.
When the transmitted light signal P3 is less than the set value
The level is high only when the object is inspected to ensure that foreign matter is not mixed into the item being inspected.
Third foreign object detection signal V3 indicating that the foreign object is attached
A third foreign object detection signal generation circuit (241
) An article inspection device characterized by comprising:
be. A third solution to the problem provided by the present invention
The determining means is to
Processes the image signal obtained by capturing an image of the article using the article imaging unit
This will prevent foreign matter from entering or adhering to the inspected item.
In an article inspection device that inspects whether or not (a)
) From the image signal P1 obtained from the surface of the inspected article
First three primary color signals for taking out three primary color signals R, G, B
and (b) the output terminal of the first three primary color signal extraction circuit (41).
The input end is connected to the first three primary color signals.
The three primary color signals R, G, B given from the circuit (41) are mutually
the first three to create the three primary color sum signal X.
the primary color signal addition circuit (44); and (c) the output terminal of the first three primary color signal extraction circuit (41).
With respect to the output terminal of the first three primary color signal addition circuit (44)
The input end is connected and the three primary color signals R, G, B are
By dividing by the color sum signal X, the three primary color signals R,
Calculate the relative chromaticity XR, XG, XB of G and B, and find the maximum
The first
a division circuit (45) and (d) a first division circuit (45)
The input end is connected to the output end of the
The relative chromaticity signal is determined by determining whether the signal X* exceeds the set value.
A high level state occurs only when No.X* exceeds the set value.
The first comparison for outputting the relative chromaticity comparison signal X+
(e) Input to the output terminal of the first comparator circuit (46)
The ends are connected and included in the relative chromaticity comparison signal
Inventory of the inspected item by counting high level conditions
The first counting circuit (4
8) and (f) to the output terminal of the first counting circuit (48).
The input terminal is connected to the first counting circuit (48).
When the count result exceeds a predetermined value, an abnormality is detected on the surface of the inspected item.
First foreign object detection signal V1 indicating that an object is attached
A first foreign object detection signal generation circuit (49) for generating
and (g) image signal P2 obtained from the back side of the article to be inspected.
The second three primary color signals for extracting the three primary color signals R, G, B from
Outputs of the color signal extraction circuit (141) and (h) the second three primary color signal extraction circuit (141)
The input end is connected to the end, and the second three primary color signals are
Three primary color signals R and G given from the extraction circuit (141)
, B to each other to create the three primary color sum signal X.
The output of the second three primary color signal addition circuit (144) and (i) the second three primary color signal extraction circuit (141)
and the output end of the second three primary color signal addition circuit (144).
The input end is connected to the three primary color signals R, G,
The three primary colors are obtained by dividing B by the three primary color sum signal X.
Calculate relative chromaticity XR, XG, XB of signals R, G, B
, to output the maximum value as the relative chromaticity signal X*
(j) to the output terminal of the second division circuit (145) and (j) of the second division circuit (145).
The input end is connected and the relative chromaticity signal X* is the set value.
It is determined whether the relative chromaticity signal X* exceeds the set value.
Relative chromaticity comparison signal that is in a high level state only when the
a second comparator circuit (146) for outputting the signal X+;
, (k) for the output terminal of the second comparator circuit (146)
The input terminal is connected to the relative chromaticity comparison signal X+.
test object by counting the high level conditions it contains.
Second counting time to count foreign matter attached to the back side of the product
(148) and (l) second counting circuit (148).
The input terminal is connected to the output terminal of the second meter.
When the counting result of the number circuit (148) exceeds a predetermined value, the
A sign indicating that foreign matter has entered or adhered to the inspected item.
a second foreign object detection signal V2 for generating the second foreign object detection signal V2;
Output signal generation circuit (149) and (m)
They are placed at a distance on the front or back side, and
Irradiates near-infrared rays from the front or back side of the inspection item.
Infrared irradiator (32A) for
spaced apart on the back side or front side of the inspection item.
The near-infrared rays that have passed through the inspected item are received and the light reception results are displayed.
A sensor (32
) and (o) the input end is connected to the output end of the sensor (32)
and whether the transmitted light signal P3 is less than the set value.
When the transmitted light signal P3 is less than the set value
The level is high only when the object is inspected to ensure that foreign matter is not mixed into the item being inspected.
Third foreign object detection signal V3 indicating that the foreign object is attached
A third foreign object detection signal generation circuit (241
) An article inspection device characterized by comprising:
be. A fourth solution to the problem provided by the present invention
The determining means is to
Processes the image signal obtained by capturing an image of the article using the article imaging unit
This will prevent foreign matter from entering or adhering to the inspected item.
In an article inspection device that inspects whether or not (a)
) From the image signal P1 obtained from the surface of the inspected article
First three primary color signals for taking out three primary color signals R, G, B
and (b) the output terminal of the first three primary color signal extraction circuit (41).
The input end is connected to the first three primary color signals.
From the three primary color signals R, G, B given from the circuit (41)
A first luminance signal creation circuit for creating the luminance signal Y (
42) and (c) the first luminance signal generation circuit (42).
The input end is connected to the output end, and the brightness signal Y is
It is determined whether the brightness signal Y exceeds the set value and the brightness signal Y exceeds the set value.
The brightness comparison signal Y+ becomes high level only when it exceeds
(d) to the output end of the first three primary color signal extraction circuit (41);
The input end is connected to the first three primary color signals.
The three primary color signals R, G, B given from the circuit (41) are mutually
the first three to create the three primary color sum signal X.
the primary color signal addition circuit (44); and (e) the output end of the first three primary color signal extraction circuit (41);
With respect to the output terminal of the first three primary color signal addition circuit (44)
The input end is connected and the three primary color signals R, G, B are
By dividing by the color sum signal X, the three primary color signals R,
Calculate the relative chromaticity XR, XG, XB of G and B, and find the maximum
The first
Division circuit (45) and (f) first division circuit (45)
The input end is connected to the output end of the
The relative chromaticity signal is determined by determining whether the signal X* exceeds the set value.
A high level state occurs only when No.X* exceeds the set value.
A second comparison for outputting a relative chromaticity comparison signal X+
(g) the output terminal of the first comparison circuit (43) and the second comparison circuit (46);
The input end is connected to the output end of the circuit (46).
Then, the luminance comparison signal Y+ and the relative chromaticity comparison signal X+ are
A first signal set that is combined and output as a combination signal Z
(h) a first signal combination circuit (47); and (h) a first signal combination circuit (47).
), the input end is connected to the output end of the
Tested by counting the high level states included in Z.
The first method is to count the foreign matter attached to the surface of the inspection item.
of the number circuit (48) and (i) the first counting circuit (48).
The input end is connected to the output end, and the first counting
When the count result of path (48) exceeds a predetermined value, the item to be inspected
The first foreign object detection indicates that a foreign object is attached to the surface of the
First foreign object detection signal generation time for generating signal V1
(49) and (j) image signal P2 obtained from the back side of the inspected article.
The second three primary color signals for extracting the three primary color signals R, G, B from
Outputs of the color signal extraction circuit (141) and (k) the second three primary color signal extraction circuit (141)
The input end is connected to the end, and the second three primary color signals are
Three primary color signals R and G given from the extraction circuit (141)
, B to create a luminance signal Y from
circuit (142), and (l) second luminance signal generation circuit.
The input end is connected to the output end of the circuit (142).
The brightness is determined by determining whether the brightness signal Y exceeds the set value.
High level state occurs only when signal Y exceeds the set value
A third comparison circuit (
143) and (m) output of the second three primary color signal extraction circuit (141)
The input end is connected to the end, and the second three primary color signals are
Three primary color signals R and G given from the extraction circuit (141)
, B to each other to create the three primary color sum signal X.
Outputs of the second three primary color signal addition circuit (144) and (n) second three primary color signal extraction circuit (141)
and the output end of the second three primary color signal addition circuit (144).
The input end is connected to the three primary color signals R, G,
The three primary colors are obtained by dividing B by the three primary color sum signal X.
Calculate relative chromaticity XR, XG, XB of signals R, G, B
, to output the maximum value as the relative chromaticity signal X*
to the output terminal of the second division circuit (145) and (o) the second division circuit (145).
The input end is connected and the relative chromaticity signal X* is the set value.
It is determined whether the relative chromaticity signal X* exceeds the set value.
Relative chromaticity comparison signal that is in a high level state only when the
a fourth comparator circuit (146) for outputting the signal X+;
, (p) the output terminal of the third comparator circuit (143) and the fourth
The input terminal is connected to the output terminal of the comparator circuit (146).
The luminance comparison signal Y+ and the relative chromaticity comparison signal
X+ and output as a combination signal Z.
2 signal combination circuit (147) and (q) the output terminal of the second signal combination circuit (147).
The input terminal is connected to
By counting the level status, it is possible to check whether the
A second counting circuit for counting attached foreign matter (
148) and (r) of the second counting circuit (148)
The input end is connected to the output end, and the second counting
When the count result of path (148) exceeds the predetermined value, the
A second foreign substance indicating that a foreign substance is attached to the back side of the item.
Generation of second foreign object detection signal to generate detection signal V2
Circuit (149) and (s) If the surface side of the item to be inspected
They are placed at a distance on the back side, and
For irradiating near infrared rays from the front side or back side.
Infrared irradiator (32A) and (t) the back of the item to be inspected.
It is placed on the surface side or spaced apart on the surface side, and
Receives near-infrared rays that have passed through the article and transmits the result as a transmission optical signal.
(u) The input end is connected to the output end of the sensor (32).
and whether the transmitted light signal P3 is less than the set value.
When the transmitted light signal P3 is less than the set value
The level is high only when the object is inspected to ensure that foreign matter is not mixed into the item being inspected.
Third foreign object detection signal V3 indicating that the foreign object is attached
A third foreign object detection signal generation circuit (241
) An article inspection device characterized by comprising:
be. Fifth solution to the problem provided by the present invention
The determining means is to
Processes the image signal obtained by capturing an image of the article using the article imaging unit
This will prevent foreign matter from entering or adhering to the inspected item.
In an article inspection device that inspects whether or not (a)
) From the image signal P1 obtained from the surface of the inspected article
The first for extracting and outputting the three primary color signals R, G, and B.
(b) Outputs of the first three primary color signal extraction circuit (341) and (b) the first three primary color signal extraction circuit (341).
The input end is connected to the end, and the first three primary color signals are
Three primary color signals R and G given from the extraction circuit (341)
, B to each other to create the three primary color sum signal X.
(c) Output of the first three primary color signal addition circuit (342) and (c) the first three primary color signal extraction circuit (341)
output of the end and first three primary color signal addition circuits (342)
The input end is connected to the end, and the first three primary color signals are
Three primary color signals R and G given from the extraction circuit (341)
, B are added to the first three primary color signal addition circuit (3
42) By dividing by the three primary color sum signal X given by
Therefore, select from the three primary color relative chromaticity signals XR, XG, and XB.
The first division circuit (3
44A1, 344B1, 344C1) and (d)
1 division circuit (344A1, 344B1, 344C1)
The input terminal is connected to the output terminal of
From the calculation circuit (344A1, 344B1, 344C1)
From the given three primary color relative chromaticity signals XR, XG, XB
Add the two selected values to each other at a predetermined ratio to obtain the relative chromaticity sum.
First relative chromaticity sum signal calculation to output signal X**
Circuit (343; 344A2, 344B2, 344C2;
345A, 345B, 345C; 346), and (e) first relative chromaticity sum signal calculation circuit (343; 34
4A2, 344B2, 344C2; 345A, 345B
, 345C; 346), the input terminal is connected to the output terminal of
and the relative chromaticity sum signal X** exceeds the set value.
It is determined that the relative chromaticity sum signal X** exceeds the set value.
Outputs a relative chromaticity sum comparison signal Z that is at a high level only when
a first comparator circuit (347) for
The input terminal is connected to the output terminal of the first comparator circuit (347).
connected and the high level included in the relative chromaticity sum comparison signal Z.
attached to the surface of the item being inspected by counting the state of the bell.
The first counting circuit (3
48) and (g) for the output terminal of the first counting circuit (348)
The input end is connected to the first counting circuit (348)
When the count result exceeds a predetermined value, an abnormality is detected on the surface of the inspected item.
A first foreign object detection signal V1 indicating that an object is attached
First foreign object detection signal generation circuit (349) for generating
and (h) image signal obtained from the back side of the item to be inspected.
Take out the three primary color signals R, G, and B from P2 and output them.
(i) the output of the second three primary color signal extraction circuit (441); and (i) the output of the second three primary color signal extraction circuit (441)
The input end is connected to the end, and the second three primary color signals are
Three primary color signals R and G given from the extraction circuit (441)
, B to each other to create the three primary color sum signal X.
Outputs of the second three primary color signal addition circuit (442) and (j) second three primary color signal extraction circuit (441)
output of the end and second three primary color signal addition circuits (442)
The input end is connected to the end, and the second three primary color signals are
Three primary color signals R and G given from the extraction circuit (441)
, B to the second three primary color signal addition circuit (4
42) By dividing by the three primary color sum signal X given by
Therefore, select from the three primary color relative chromaticity signals XR, XG, and XB.
A second division circuit (4
44A1, 444B1, 444C1) and (k)
2 division circuit (444A1, 444B1, 444C1)
The input terminal is connected to the output terminal of
From the calculation circuit (444A1, 444B1, 444C1)
From the given three primary color relative chromaticity signals XR, XG, XB
Add the two selected values to each other at a predetermined ratio to obtain the relative chromaticity sum.
Second relative chromaticity sum signal calculation to output signal X**
Circuit (443; 444A2, 444B2, 444C2;
445A, 445B, 445C; 446), and (l) second relative chromaticity sum signal calculation circuit (443; 44
4A2, 444B2, 444C2; 445A, 445B
, 445C; 446), the input terminal is connected to the output terminal of
and the relative chromaticity sum signal X** exceeds the set value.
It is determined that the relative chromaticity sum signal X** exceeds the set value.
Outputs a relative chromaticity sum comparison signal Z that is at a high level only when
a second comparator circuit (447) for
The input terminal is connected to the output terminal of the second comparator circuit (447).
connected and the high level included in the relative chromaticity sum comparison signal Z.
attached to the back side of the inspected item by counting the bell condition.
A second counting circuit (4
48) and (n) for the output terminal of the second counting circuit (448)
The input end is connected to the second counting circuit (448)
When the counting result exceeds a predetermined value, an abnormality is
A second foreign object detection signal V2 indicating that an object is attached
Second foreign object detection signal generation circuit (449) for generating
and (o) spaced on the front or back side of the item to be inspected.
It is placed on the surface side or
Infrared irradiator (3) for irradiating near infrared rays from the back side
2A) and (p) the back side or front side of the item to be inspected.
It is placed at a distance from the side, and the nearby
Receives infrared rays and outputs the reception result as a transmitted light signal P3
(q) The input end is connected to the output end of the sensor (32).
and whether the transmitted light signal P3 is less than the set value.
When the transmitted light signal P3 is less than the set value
The level is high only when the object is inspected to ensure that foreign matter is not mixed into the item being inspected.
Third foreign object detection signal V3 indicating that the foreign object is attached
A third foreign object detection signal generation circuit (241
) An article inspection device characterized by comprising:
be. Sixth solution to the problem provided by the present invention
The determining means is to
Processes the image signal obtained by capturing an image of the article using the article imaging unit
This will prevent foreign matter from entering or adhering to the inspected item.
In an article inspection device that inspects whether or not (a)
) From the image signal P1 obtained from the surface of the inspected article
The first for extracting and outputting the three primary color signals R, G, and B.
(b) Outputs of the first three primary color signal extraction circuit (341) and (b) the first three primary color signal extraction circuit (341).
The input end is connected to the end, and the first three primary color signals are
Three primary color signals R and G given from the extraction circuit (341)
, B to each other to create the three primary color sum signal X.
(c) Output of the first three primary color signal addition circuit (342) and (c) the first three primary color signal extraction circuit (341)
output of the end and first three primary color signal addition circuits (342)
The input end is connected to the end, and the first three primary color signals are
Three primary color signals R and G given from the extraction circuit (341)
, B to the first three primary color signal addition circuits (3
42) By dividing by the three primary color sum signal X given by
Therefore, select from the three primary color relative chromaticity signals XR, XG, and XB.
Calculate one value and output it as relative chromaticity signal X*
The first division circuit (344A1, 344B1, 34
4C1; 344A2, 344B2, 344C2; 346
) and (d) the first division circuit (344A1, 344
B1,344C1; 344A2,344B2,344C
2; The input end is connected to the output end of 346).
and the first division circuit (344A1, 344B1, 344
C1; 344A2, 344B2, 344C2; 346)
The relative chromaticity signal X* given by exceeds the set value.
It is determined whether the relative chromaticity signal X* exceeds the set value.
Outputs a relative chromaticity comparison signal that is in a high level state only occasionally
(e) a first comparator circuit (347) for
The input terminal is connected to the output terminal of the comparator circuit (347) of No. 1.
The high-level state contained in the relative chromaticity comparison signal is
Contamination or adhesion to the inspected item can be detected by counting the number of particles.
A first counting circuit (34
8) and (f) for the output terminal of the first counting circuit (348)
The input end is connected to the first counting circuit (348)
When the count result exceeds a predetermined value, an abnormality is detected on the surface of the inspected item.
A first foreign object detection signal V1 indicating that an object is attached
First foreign object detection signal generation circuit (349) for generating
and (g) image signal obtained from the back side of the item to be inspected.
Take out the three primary color signals R, G, and B from P2 and output them.
and (h) the output of the second three primary color signal extraction circuit (441) for
The input end is connected to the end, and the second three primary color signals are
Three primary color signals R and G given from the extraction circuit (441)
, B to each other to create the three primary color sum signal X.
The output of the second three primary color signal addition circuit (442) and (i) the second three primary color signal extraction circuit (441)
output of the end and second three primary color signal addition circuits (442)
The input end is connected to the end, and the second three primary color signals are
Three primary color signals R and G given from the extraction circuit (441)
, B to the second three primary color signal addition circuit (4
42) By dividing by the three primary color sum signal X given by
Therefore, select from the three primary color relative chromaticity signals XR, XG, and XB.
Calculate one value and output it as relative chromaticity signal X*
The second division circuit (444A1, 444B1, 44
4C1; 444A2, 444B2, 444C2; 446
) and (j) second division circuit (444A1, 444
B1,444C1; 444A2,444B2,444C
The input end is connected to the output end of 2;446).
and the second division circuit (444A1, 444B1, 444
C1; 444A2, 444B2, 444C2; 446)
The relative chromaticity signal X* given by exceeds the set value.
It is determined whether the relative chromaticity signal X* exceeds the set value.
Outputs a relative chromaticity comparison signal that is in a high level state only occasionally
a second comparator circuit (447) for
The input end is connected to the output end of the second comparison circuit (447).
The high-level state contained in the relative chromaticity comparison signal is
By counting the number of particles attached to the back side of the inspected item,
Second counting circuit (448) for counting the number of foreign objects
and (l) at the output end of the second counting circuit (448).
The input terminal is connected to the second counting circuit (44
8) When the counting result exceeds the specified value, there is a difference in the inspected item.
Second foreign object detection that indicates that objects are mixed in or attached
Second foreign object detection signal generation time for generating signal V2
(449) and (m) Surface side of the item to be inspected or
It is placed at a distance on the back side, and is placed on the front side of the object to be inspected.
Infrared for irradiating near infrared rays from the front side or back side
Ray irradiator (32A) and (n) back side of the item to be inspected
or spaced apart on the surface side of the item to be inspected.
The near-infrared rays that have passed through the
(o) The input end is connected to the output end of the sensor (32).
and whether the transmitted light signal P3 is less than the set value.
When the transmitted light signal P3 is less than the set value
The level is high only when the object is inspected to ensure that foreign matter is not mixed into the item being inspected.
Third foreign object detection signal V3 indicating that the foreign object is attached
A third foreign object detection signal generation circuit (241
) An article inspection device characterized by comprising:
be. Seventh solution to the problem provided by the present invention
The determining means is to
Processes the image signal obtained by capturing an image of the article using the article imaging unit
This will prevent foreign matter from entering or adhering to the inspected item.
In an article inspection device that inspects whether or not (a)
) From the image signal P1 obtained from the surface of the inspected article
The first for extracting and outputting the three primary color signals R, G, and B.
(b) Outputs of the first three primary color signal extraction circuit (341) and (b) the first three primary color signal extraction circuit (341).
The input end is connected to the end, and the first three primary color signals are
Three primary color signals R and G given from the extraction circuit (341)
, B to each other to create the three primary color sum signal X.
(c) Output of the first three primary color signal addition circuit (342) and (c) the first three primary color signal extraction circuit (341)
output of the end and first three primary color signal addition circuits (342)
The input end is connected to the end, and the first three primary color signals are
Three primary color signals R and G given from the extraction circuit (341)
, B are given from the first three primary color signal addition circuit (342).
The relative three primary colors are calculated by dividing by the three primary color sum signal
To calculate and output chromaticity signals XR, XG, XB
First division circuit (344A1, 344B1, 344C1
) and (d) first division circuit (344A1, 344B1, 3
The input end is connected to the output end of 44C1).
, first division circuit (344A1, 344B1, 344C
1) Three primary color relative chromaticity signals XR, XG, given from
XB is multiplied by predetermined coefficients α, β, and γ to obtain
Calculate the primary color relative chromaticity signals αXR, βXG, γXB
First multiplication circuit (344A2, 344B) for output
2,344C2) and (e) First three primary color signal extraction
The input end is connected to the output end of the circuit (341).
and is given from the first three primary color signal extraction circuit (341).
By comparing the three primary color signals R, G, and B,
The selection signals gR, gG, which become 0 corresponding to the maximum value
First selection signal generation time for calculating and outputting gB
(343) and (f) the first multiplier circuit (344A2, 344B2, 3
44C2) and the first selection signal generation circuit (
The input end is connected to the output end of 343),
The selection given from the first selection signal generation circuit (343)
The selection signals gR, gG, gB and the first multiplier circuit (344A
2,344B2,344C2) with coefficients given from
The product of the three primary color relative chromaticity signals αXR, βXG, γXB is
For adding together and outputting relative chromaticity sum signal X**
First relative chromaticity sum signal calculation circuit (345A, 345B,
345C; 346) and (g) first relative chromaticity sum signal
Calculation circuit (345A, 345B, 345C; 346)
The input end is connected to the output end, and the relative chromaticity sum signal is
Determine whether the number X** exceeds the set value and calculate the relative chromaticity sum.
High level status occurs only when signal X** exceeds the set value.
The first comparison for outputting the relative chromaticity sum comparison signal Z
For the output terminal of the circuit (347) and (h) the first comparator circuit (347)
The input terminal is connected and included in the relative chromaticity sum comparison signal Z.
by counting the high level conditions detected in the inspected item.
The first step is to count the number of foreign substances mixed in or attached.
For the output terminal of the counting circuit (348) and (i) the first counting circuit (348)
The input end is connected to the first counting circuit (348)
When the count result exceeds a predetermined value, an abnormality is detected on the surface of the inspected item.
A first foreign object detection signal V1 indicating that an object is attached
First foreign object detection signal generation circuit (349) for generating
and (j) image signal obtained from the back side of the item to be inspected.
Take out the three primary color signals R, G, and B from P2 and output them.
(k) Output of the second three primary color signal extraction circuit (441) for (k) the second three primary color signal extraction circuit (441)
The input end is connected to the end, and the second three primary color signals are
Three primary color signals R and G given from the extraction circuit (441)
, B to each other to create the three primary color sum signal X.
The output of the second three primary color signal addition circuit (442) and (l) the second three primary color signal extraction circuit (441)
output of the end and second three primary color signal addition circuits (442)
The input end is connected to the end, and the second three primary color signals are
Three primary color signals R and G given from the extraction circuit (441)
, B are given from the second three primary color signal addition circuit (442).
The relative three primary colors are calculated by dividing by the three primary color sum signal
To calculate and output chromaticity signals XR, XG, XB
Second division circuit (444A1, 444B1, 444C1
) and (m) second division circuit (444A1, 444B1, 4
The input end is connected to the output end of 44C1).
, second division circuit (444A1, 444B1, 444C
1) Three primary color relative chromaticity signals XR, XG, given from
XB is multiplied by predetermined coefficients α, β, and γ to obtain
Calculate the primary color relative chromaticity signals αXR, βXG, γXB
Second multiplication circuit (444A2, 444B) for output
2,444C2) and (n) Second three primary color signal extraction
The input end is connected to the output end of the circuit (441).
and is given from the second three primary color signal extraction circuit (441).
By comparing the three primary color signals R, G, and B,
The selection signals gR, gG, which become 0 corresponding to the maximum value
Second selection signal generation time for calculating and outputting gB
(443) and (o) second multiplier circuit (444A2, 444B2, 4
44C2) and the second selection signal generation circuit (
The input end is connected to the output end of 443),
The selection given from the second selection signal generation circuit (443)
The selection signals gR, gG, gB and the second multiplier circuit (444A
2,444B2,444C2) with coefficients given from
The product of the three primary color relative chromaticity signals αXR, βXG, γXB is
For adding together and outputting relative chromaticity sum signal X**
Second relative chromaticity sum signal calculation circuit (445A, 445B,
445C; 446) and (p) second relative chromaticity sum signal
Calculation circuit (445A, 445B, 445C; 446)
The input end is connected to the output end, and the relative chromaticity sum signal is
Determine whether the number X** exceeds the set value and calculate the relative chromaticity sum.
High level status occurs only when signal X** exceeds the set value.
The second comparison for outputting the relative chromaticity sum comparison signal Z
For the output terminal of the circuit (447) and (q) the second comparison circuit (447)
The input terminal is connected and included in the relative chromaticity sum comparison signal Z.
by counting the high level conditions detected in the inspected item.
A second method for counting the number of foreign substances mixed in or attached.
For the output terminals of the counting circuit (448) and (r) the second counting circuit (448)
The input end is connected to the second counting circuit (448)
When the count result exceeds a predetermined value, the item being inspected is contaminated with foreign matter.
A second foreign object detection signal V indicating that the object has entered or is attached
A second foreign object detection signal generation circuit (4
49) and (s) Front side or back side of the item to be inspected
The surface side of the object to be inspected is also
Infrared irradiation to irradiate near infrared rays from the back side
(32A) and (t) the back side of the item to be inspected or
are placed at a distance on the surface side and transmit through the object to be inspected.
The received near-infrared light is received as a transmitted light signal P3.
and (u) the input end is connected to the output end of the sensor (32).
and whether the transmitted light signal P3 is less than the set value.
When the transmitted light signal P3 is less than the set value
The level is high only when the object is inspected to ensure that foreign matter is not mixed into the item being inspected.
Third foreign object detection signal V3 indicating that the foreign object is attached
A third foreign object detection signal generation circuit (241
) An article inspection device characterized by comprising:
be. Eighth solution to the problem provided by the present invention
The determining means is to
Processes the image signal obtained by capturing an image of the article using the article imaging unit
Check whether foreign matter is attached to the inspected item by
In an article inspection device that inspects (a)
Image signals P1 and P obtained from the front or back side of the article
2. Three primary colors for extracting the three primary color signals R, G, B from
Signal extraction circuit (41; 141) and (b) three primary color signals
The input end is connected to the output end of the extraction circuit (41; 141).
The three primary color signal extraction circuits (41; 141)
Create a luminance signal Y from the three primary color signals R, G, and B given from
a luminance signal generation circuit (42; 142) for
c) Corresponding to the output terminal of the luminance signal generation circuit (42; 142)
the input end is connected, and the brightness signal Y exceeds the set value.
When the brightness signal Y exceeds the set value
Outputs a brightness comparison signal Y+ that is at a high level only when
and (d) a comparison circuit (43; 143) for the output terminal of the comparison circuit (43; 143).
The power end is connected and included in the brightness comparison signal Y+
The surface of the item being inspected by counting high level conditions
Counting circuit (48; 14) for counting foreign matter attached to
8) and (e) at the output end of the counting circuit (48; 148).
The input terminal is connected to the counting circuit (48; 14
8) When the counting result exceeds the predetermined value, the surface of the item to be inspected
A first foreign object detection signal V indicating that a foreign object is attached to the
1, the first foreign object detection signal generation time for generating V2
(49; 149) and (f) also the surface side of the item to be inspected.
or spaced apart on the back side of the item to be inspected.
On the other hand, near-infrared rays are emitted from the front side or the back side.
(g) infrared irradiator (32A) of the article to be inspected.
They are placed at a distance on the back side or front side, and
The near-infrared rays that have passed through the inspection object are received and the received light is converted into transmitted light.
A sensor (32) for outputting as signal P3, and (h) an input end connected to the output end of the sensor (32).
and whether the transmitted light signal P3 is less than the set value.
When the transmitted light signal P3 is less than the set value
The level is high only when the object is inspected to ensure that foreign matter is not mixed into the item being inspected.
Second foreign object detection signal V3 indicating that the foreign object is attached
A second foreign object detection signal generation circuit (241
) An article inspection device characterized by comprising:
be. Ninth solution to the problem provided by the present invention
The determining means is to
Processes the image signal obtained by capturing an image of the article using the article imaging unit
This will prevent foreign matter from entering or adhering to the inspected item.
In an article inspection device that inspects whether or not (a)
) Image signals obtained from the front or back side of the item to be inspected.
In order to extract the three primary color signals R, G, and B from the numbers P1 and P2,
The three primary color signal extraction circuits (41; 141) and (b)
To the output terminal of the three primary color signal extraction circuit (41; 141)
The input end is connected to the three primary color signal extraction circuit (41;
141), the three primary color signals R, G, and B given from
Addition of the three primary color signals to create the three primary color sum signal
Output terminal of calculation circuit (44; 144) and (c) three primary color signal extraction circuit (41; 141)
and the output end of the three primary color signal addition circuit (44; 144).
The input end is connected, and the three primary color signals R, G, B are
The three primary color signals are divided by the three primary color sum signal X.
Calculate the relative chromaticity XR, XG, XB of R, G, B, and
The ratio for outputting the large one as a relative chromaticity signal
a calculation circuit (45; 145); and (d) a division circuit (45;
145), the input end is connected to the output end of the
Determine whether the chromaticity signal X* exceeds the set value and make a comparison.
High level only when the chromaticity signal X* exceeds the set value
The ratio for outputting the relative chromaticity comparison signal X+ that becomes the state
and (e) the input to the output terminal of the comparison circuit (46; 146).
The power end is connected and included in the relative chromaticity comparison signal
of the item being inspected by counting the high level conditions detected.
Counting circuit (48; for counting foreign matter attached to the surface)
148) and (f) the output of the counting circuit (48; 148)
The input end is connected to the end, and the counting circuit (48;
148) when the counting result exceeds the predetermined value.
A first foreign object detection signal indicating that a foreign object is attached to the surface.
The first foreign object detection signal is generated to generate signals V1 and V2.
Raw circuit (49; 149) and (g) surface of the item to be inspected
The object to be inspected is
Irradiates near-infrared rays to the product from the front or back side
Infrared irradiator (32A) and (h) object to be inspected.
They are placed at a distance on the back or front side of the product.
It receives near-infrared rays that have passed through the inspected item and transmits the results.
a sensor (32) for outputting as an overlight signal P3;
, (i) The input end is connected to the output end of the sensor (32)
and whether the transmitted light signal P3 is less than the set value.
When the transmitted light signal P3 is less than the set value
The level is high only when the object is inspected to ensure that foreign matter is not mixed into the item being inspected.
Second foreign object detection signal V3 indicating that the foreign object is attached
A second foreign object detection signal generation circuit (241
) An article inspection device characterized by comprising:
be. Tenth problem provided by the present invention
The solution is to
Processes the image signal obtained by imaging the object to be inspected by the object imaging section.
This prevents foreign matter from entering or adhering to the inspected item.
In an article inspection device that inspects whether or not (
a) Image obtained from the front or back side of the item to be inspected
Extract the three primary color signals R, G, and B from the signals P1 and P2
The three primary color signal extraction circuits (41; 141) for
To the output terminal of the three primary color signal extraction circuit (41; 141)
The input terminal is connected to the three primary color signal extraction circuit (41
;141) from the three primary color signals R, G, B given from
Luminance signal generation circuit (42; 1
42) and (c) luminance signal generation circuit (42; 142)
The input terminal is connected to the output terminal of the luminance signal Y
It is determined whether or not the brightness signal Y exceeds the set value.
The brightness comparison signal Y becomes high level only when it exceeds
The first comparison circuit (43; 143) for outputting +
(d) Output terminal of the three primary color signal extraction circuit (41; 141)
The input end is connected to the three primary color signal extraction circuit.
Three primary color signals R, G, B given from (41; 141)
The three primary colors are added together to create the three primary color sum signal X.
Output terminals of the color signal addition circuit (44; 144) and (e) the three primary color signal extraction circuit (41; 141)
and the output end of the three primary color signal addition circuit (44; 144).
The input end is connected, and the three primary color signals R, G, B are
The three primary color signals are divided by the three primary color sum signal X.
Calculate the relative chromaticity XR, XG, XB of R, G, B, and
The ratio for outputting the large one as a relative chromaticity signal
Arithmetic circuit (45; 145) and (f) division circuit (45;
145), the input end is connected to the output end of the
Determine whether the chromaticity signal X* exceeds the set value and make a comparison.
High level only when the chromaticity signal X* exceeds the set value
The first signal for outputting the relative chromaticity comparison signal
2 comparison circuit (46; 146) and (g) 1st comparison circuit
The output terminal of the circuit (43; 143) and the second comparison circuit (46
The input end is connected to the output end of ;146).
, the luminance comparison signal Y+ and the relative chromaticity comparison signal X+ are combined.
A signal combination circuit that outputs the combined signal Z (
47; 147) and (h) to the output end of the signal combination circuit (47; 147).
The input end is connected to the high level included in the combination signal Z.
attached to the surface of the item being inspected by counting the state of the bell.
Counting circuit (48; 148) for counting foreign objects that have landed
and (i) for the output terminal of the counting circuit (48; 148)
The input terminal is connected to the counting circuit (48; 148).
When the count result exceeds a predetermined value, an abnormality is detected on the surface of the inspected item.
A first foreign object detection signal V1 indicating that an object is attached;
A first foreign object detection signal generation circuit for generating V2 (
49;149) and (j) the surface side of the article to be inspected or
are placed at a distance on the back side, and
Red for irradiating near infrared rays from the front or back side
External irradiator (32A) and (k) back side of the item to be inspected
They are placed spaced apart on the side or surface side of the object to be inspected.
Receives the near infrared rays that have passed through the product and converts the reception result into a transmitted light signal.
A sensor (32) for outputting as P3, and (l) an input end connected to the output end of the sensor (32).
and whether the transmitted light signal P3 is less than the set value.
When the transmitted light signal P3 is less than the set value
The level is high only when the object is inspected to ensure that foreign matter is not mixed into the item being inspected.
Second foreign object detection signal V3 indicating that the foreign object is attached
A second foreign object detection signal generation circuit (241
) An article inspection device characterized by comprising:
be. [0018] Eleventh problem provided by the present invention
The solution is to
Processes the image signal obtained by imaging the object to be inspected by the object imaging section.
This prevents foreign matter from entering or adhering to the inspected item.
In an article inspection device that inspects whether or not (
a) Image obtained from the front or back side of the item to be inspected
Extract the three primary color signals R, G, and B from the signals P1 and P2.
Three primary color signal extraction circuits (341; 441
) and (b) three primary color signal extraction circuits (341; 441
), the input end is connected to the output end of the three primary colors.
Mihara given from the signal extraction circuit (341; 441)
Add the color signals R, G, and B to each other to create the three primary color sum signal X.
Three primary color signal addition circuits (342; 442) for
(c) Output of the three primary color signal extraction circuits (341; 441)
Power end and three primary color signal addition circuits (342; 442)
The input end is connected to the output end, and the three primary color signals are
Three primary color signals given from the output circuit (341; 441)
The two selected from R, G, and B are added to the three primary color signal addition circuits (3
42;442) divided by the three primary color sum signal X given from
Three primary color relative chromaticity signals XR, XG, XB
A division circuit (
344A1, 344B1, 344C1; 444A1, 4
44B1, 444C1) and (d) division circuit (34
4A1,344B1,344C1;444A1,444
The input end is connected to the output end of B1,444C1).
The division circuit (344A1, 344B1, 344
C1; 444A1, 444B1, 444C1) given from
Select from the obtained three primary color relative chromaticity signals XR, XG, XB.
Add the two detected values to each other at a predetermined ratio to calculate the relative chromaticity sum.
Relative chromaticity sum signal calculation circuit (3
43;344A2,344B2,344C2,;345
A, 345B, 345C; 346; 443; 444A2
, 444B2, 444C2; 445A, 445B, 44
5C; 446) and (e) Relative chromaticity sum signal calculation circuit (343; 344A2)
,344B2,344C2,;345A,345B,3
45C; 346; 443; 444A2, 444B2, 4
44C2; 445A, 445B, 445C; 446)
The input end is connected to the output end, and the relative chromaticity sum signal is
Determine whether the number X** exceeds the set value and calculate the relative chromaticity sum.
High level status occurs only when signal X** exceeds the set value.
A comparison circuit for outputting a relative chromaticity sum comparison signal Z (
347; 447) and (f) the output terminal of the comparison circuit (347; 447)
The input end is connected to the chromaticity sum comparison signal Z.
The item being inspected by counting the high level conditions
Counting circuit for counting the number of foreign objects attached to the surface of
(348; 448) and (g) counting circuit (348;
448) The input end is connected to the output end of
The counting result of the counting circuit (348; 448) exceeds the predetermined value.
When inspected, it is possible to detect the presence of foreign matter on the surface of the inspected item.
for generating the first foreign object detection signals V1 and V2 shown in FIG.
a first foreign object detection signal generation circuit (349; 449);
(h) Separately placed on the front or back side of the item to be inspected.
placed on the front or back side of the item being inspected.
Infrared irradiator (32A) for irradiating near infrared rays from the side
) and (i) on the back side or front side of the item to be inspected.
near infrared light transmitted through the inspected item.
It receives the light beam and outputs the light reception result as a transmitted light signal P3.
(j) The input end is connected to the output end of the sensor (32).
and whether the transmitted light signal P3 is less than the set value.
When the transmitted light signal P3 is less than the set value
The level is high only when the object is inspected to ensure that foreign matter is not mixed into the item being inspected.
Second foreign object detection signal V3 indicating that the foreign object is attached
A second foreign object detection signal generation circuit (241
) An article inspection device characterized by comprising:
be. [0019] The twelfth problem provided by the present invention is
The solution is to
Processes the image signal obtained by imaging the object to be inspected by the object imaging section.
This prevents foreign matter from entering or adhering to the inspected item.
In an article inspection device that inspects whether or not (
a) Image obtained from the front or back side of the item to be inspected
Extract the three primary color signals R, G, and B from the signals P1 and P2.
Three primary color signal extraction circuits (341; 441
) and (b) three primary color signal extraction circuits (341; 441
), the input end is connected to the output end of the three primary colors.
Mihara given from the signal extraction circuit (341; 441)
Add the color signals R, G, and B to each other to create the three primary color sum signal X.
Three primary color signal addition circuits (342; 442) for
(c) Output of the three primary color signal extraction circuits (341; 441)
Power end and three primary color signal addition circuits (342; 442)
The input end is connected to the output end, and the three primary color signals are
Three primary color signals given from the output circuit (341; 441)
One selected from R, G, and B is added to the three primary color signal addition circuits (3
42;442) divided by the three primary color sum signal X given from
Three primary color relative chromaticity signals XR, XG, XB
Calculate one selected from the following and use it as a relative chromaticity signal X*
Division circuit for output (344A1, 344B1, 3
44C1; 344A2, 344B2, 344C2; 44
4A1,444B1,444C1;444A2,444
B2,444C2) and (d) division circuit (344A
1,344B1,344C1; 344A2,344B2
, 344C2; 444A1, 444B1, 444C1;
444A2, 444B2, 444C2)
The input terminal is connected to the divider circuit (344A1,
344B1, 344C1; 344A2, 344B2, 3
44C2; 444A1, 444B1, 444C1; 44
4A2, 444B2, 444C2)
Determine whether the chromaticity signal X* exceeds the set value and make a comparison.
High level only when the chromaticity signal X* exceeds the set value
Comparison circuit for outputting a relative chromaticity comparison signal that becomes the state
(347; 447) and (e) comparison circuit (347;
The input end is connected to the output end of 447),
Counting the high level states included in the relative chromaticity comparison signal
The number of foreign substances mixed in or attached to the inspected item due to
A counting circuit (348; 448) for counting
f) To the output terminal of the counting circuit (348; 448)
The input end is connected and the counting circuit (348; 448)
When the count result exceeds a predetermined value,
First foreign object detection signal V1 indicating that a foreign object is attached
, V2 first foreign object detection signal generation circuit
(349; 449) and (g) surface side of the item to be inspected.
Or it is placed at a distance on the back side of the item to be inspected.
In order to irradiate near infrared rays from the front side or back side of
(h) Infrared irradiator (32A) and (h) Article to be inspected.
It is placed at a distance on the back side or front side of the
Receives near-infrared rays that have passed through the inspection item and transmits the received light results.
a sensor (32) for outputting as an optical signal P3; (i) the input end is connected to the output end of the sensor (32);
and whether the transmitted light signal P3 is less than the set value.
When the transmitted light signal P3 is less than the set value
The level is high only when the object is inspected to ensure that foreign matter is not mixed into the item being inspected.
Second foreign object detection signal V3 indicating that the foreign object is attached
A second foreign object detection signal generation circuit (241
) An article inspection device characterized by comprising:
be. Thirteenth problem provided by the present invention
The solution is to
Processes the image signal obtained by imaging the object to be inspected by the object imaging section.
This prevents foreign matter from entering or adhering to the inspected item.
In an article inspection device that inspects whether or not (
a) Image obtained from the front or back side of the item to be inspected
Extract the three primary color signals R, G, and B from the signals P1 and P2.
Three primary color signal extraction circuits (341; 441
) and (b) three primary color signal extraction circuits (341; 441
), the input end is connected to the output end of the three primary colors.
Mihara given from the signal extraction circuit (341; 441)
Add the color signals R, G, and B to each other to create the three primary color sum signal X.
Three primary color signal addition circuits (342; 442) for
(c) Output of the three primary color signal extraction circuits (341; 441)
Power end and three primary color signal addition circuits (342; 442)
The input end is connected to the output end, and the three primary color signals are
Three primary color signals given from the output circuit (341; 441)
R, G, B three primary color signal addition circuit (342; 442)
By dividing by the three primary color sum signal X given from
Calculate and output primary color relative chromaticity signals XR, XG, XB.
Division circuit (344A1, 344B1, 344C
1; 444A1, 444B1, 444C1) and (d) division circuit (344A1, 344B1, 344C
1; 444A1, 444B1, 444C1) output end
The input end is connected to the divider circuit (344A
1,344B1,344C1;444A1,444B1
, 444C1)
Multiply R, XG, and XB by predetermined coefficients α, β, and γ.
Three primary color relative chromaticity signals αXR, βXG, γXB with coefficients
Multiplication circuit (344A2, 344A2, 3
44B2, 344C2; 444A2, 444B2, 44
4C2) and (e) three primary color signal extraction circuit (341;
The input end is connected to the output end of 441),
Given from the three primary color signal extraction circuits (341; 441)
By comparing the three primary color signals R, G, and B, the
Selection signals gR, gG, gB that become 0 corresponding to large ones
A selection signal generation circuit (343) for calculating and outputting
;443) and (f) Multiplication circuit (344A2, 344B2, 344C
2; 444A2, 444B2, 444C2) output end
and the output terminal of the selection signal generation circuit (343; 443)
The input terminal is connected to the selection signal generation circuit (
343; 443) Selection signals gR, gG given from
, gB and the multiplication circuit (344A2, 344B2, 344
C2; 444A2, 444B2, 444C2)
Three primary color relative chromaticity signals αXR, βXG, γX with coefficients
Add the products with B to each other to output the relative chromaticity sum signal X**.
Relative chromaticity sum signal calculation circuit (345A, 34
5B, 345C; 346; 445A, 445B, 445
C; 446) and (g) Relative chromaticity sum signal calculation circuit (345A, 345B
, 345C; 346; 445A, 445B, 445C;
The input end is connected to the output end of 446),
Determine whether the relative chromaticity sum signal X** exceeds the set value.
High only when the relative chromaticity sum signal X** exceeds the set value.
To output the relative chromaticity sum comparison signal Z that is in the level state
Comparison circuit (347; 447) and (h) comparison circuit
The input terminal is connected to the output terminal of (347; 447).
The high-level state included in the relative chromaticity sum comparison signal Z
Contamination or adhesion to the inspected item can be detected by counting the number of particles.
A counting circuit (348; 4) for counting the number of foreign objects
48) and (i) for the output terminal of the counting circuit (348; 448)
The input terminal is connected to the counting circuit (348; 448
) when the count result exceeds a predetermined value, the surface of the item to be inspected
A first foreign object detection signal V indicating that a foreign object is attached to the
1, the first foreign object detection signal generation time for generating V2
(349; 449) and (j) the surface of the article to be inspected.
The object to be inspected is
Irradiates near-infrared rays to the product from the front or back side
Infrared irradiator (32A) and (k) object to be inspected.
They are placed at a distance on the back or front side of the product.
It receives near-infrared rays that have passed through the inspected item and transmits the results.
a sensor (32) for outputting as an overlight signal P3;
, (l) The input end is connected to the output end of the sensor (32)
and whether the transmitted light signal P3 is less than the set value.
When the transmitted light signal P3 is less than the set value
The level is high only when the object is inspected to ensure that foreign matter is not mixed into the item being inspected.
Second foreign object detection signal V3 indicating that the foreign object is attached
A second foreign object detection signal generation circuit (241
) An article inspection device characterized by comprising:
be. [Operation] The article inspection device according to the present invention solves the above-mentioned problems.
In the ``Solutions for points'' column, enter the information listed as the first solution.
In particular, transparent materials obtained by irradiating near-infrared rays onto the item
By processing the excessive light signal P3, foreign objects can be detected on the inspected item.
Since we are inspecting whether or not it is mixed or attached, (
i) Check with the naked eye any foreign matter mixed in or attached to the item to be inspected.
(ii)
) Remove any foreign matter that has entered or adhered to the item being inspected.
It has the effect of enabling detection regardless of thickness, and
(iii) In addition to the effect of reducing the number of inspection personnel (
iv) Effect to improve the inspection accuracy of the inspected article
Eggplant. [0022] The article inspection device according to the present invention has the above-mentioned [
In the column ``Means for resolving the problem'', enter the second to thirteenth solutions.
As mentioned above, the front or back side of the item to be inspected.
By processing the image signals P1 and P2 obtained from
Inspecting whether or not foreign matter is attached to the inspected item.
In addition, the transparent material obtained by irradiating near-infrared rays on the inspected item
By processing the excessive light signal P3, foreign objects can be detected on the inspected item.
We are inspecting to see if it is contaminated or attached.
In addition to the effects described in (i) to (iv), (v) the optical characteristics of the front or back surface of the article to be inspected;
Image signals P1, P with optical characteristics approaching or inferior to
2. Effect that allows inspection of foreign substances that are difficult to detect with only
(vi) Further improve the inspection accuracy of inspected items.
act. [0023] The article inspection device according to the present invention has the above-mentioned [
In the 5th to 7th solution to the problem column.
Also, the solutions listed as the 11th to 13th solutions.
In particular, the relationship between the optical properties of the item to be inspected and the optical properties of the foreign object is
Based on the differences, the
The image signals P1 and P2 are processed as appropriate.
Therefore, in addition to the effects of (i) to (vi) above, (vii
) Remove any foreign matter attached to the item to be inspected.
It has the effect of making it possible to detect it by using the difference in color.
(viii) Improving the time efficiency of foreign matter inspection of inspected items.
In other words, (ix) suitable foreign matter inspection according to the properties of the inspected article.
It acts to achieve the following. [Example] Next, regarding the article inspection device according to the present invention
, giving preferred embodiments thereof and referring to the accompanying drawings:
I will explain in detail. However, in the embodiment described below,
The description has been made to facilitate or promote the understanding of the present invention.
However, what is stated for the purpose of limiting the present invention is
It's not. In other words, in the embodiments described below,
Each element disclosed herein is within the spirit and technical scope of the present invention.
All design changes and equivalent substitutions within the scope of
It includes. (Description of the attached drawings) FIG. 1A shows a diagram of the article inspection apparatus according to the present invention.
FIG. 2 is a block circuit diagram showing a part of the first embodiment.
. FIG. 1B shows an article inspection device according to the present invention.
FIG. 2 is a block circuit diagram showing a part of the first embodiment.
. FIG. 1C shows an article inspection apparatus according to the present invention.
FIG. 2 is a block circuit diagram showing a part of the first embodiment.
. FIG. 2 shows the first
A partially cutaway perspective view for enlarging and showing a part of the embodiment of
be. FIG. 3 shows the first
Partial block circuit for enlarging and showing a part of the embodiment of
It is a diagram. FIG. 4 shows the first
FIG. 3 is a flowchart diagram showing the operation of the embodiment. FIG. 5A shows an article inspection apparatus according to the present invention.
FIG. 2 is a block circuit diagram showing a part of a second embodiment.
. FIG. 5B shows the article inspection apparatus according to the present invention.
FIG. 2 is a block circuit diagram showing a part of a second embodiment.
. FIG. 5C shows the article inspection apparatus according to the present invention.
FIG. 2 is a block circuit diagram showing a part of a second embodiment.
. FIG. 6 shows the second
FIG. 3 is a flowchart diagram showing the operation of the embodiment. FIG. 7A shows an article inspection apparatus according to the present invention.
FIG. 2 is a block circuit diagram showing a part of a third embodiment; FIG.
. FIG. 7B shows the article inspection device according to the present invention.
FIG. 2 is a block circuit diagram showing a part of a third embodiment; FIG.
. FIG. 7C shows the article inspection apparatus according to the present invention.
FIG. 2 is a block circuit diagram showing a part of a third embodiment; FIG.
. FIG. 8 shows the third example shown in FIGS. 7A to 7C.
FIG. 3 is a flowchart diagram showing the operation of the embodiment. FIG. 9A shows an article inspection apparatus according to the present invention.
FIG. 4 is a block circuit diagram showing a part of a fourth embodiment.
. FIG. 9B shows the article inspection apparatus according to the present invention.
FIG. 4 is a block circuit diagram showing a part of a fourth embodiment.
. FIG. 9C shows the article inspection device according to the present invention.
FIG. 4 is a block circuit diagram showing a part of a fourth embodiment.
. FIG. 10 shows the structure shown in FIGS. 9A to 9C.
FIG. 4 is a flowchart diagram showing the operation of the fourth embodiment.
. FIG. 11A shows an article inspection device according to the present invention.
FIG. 2 is a block circuit diagram showing a part of a fifth embodiment of the invention;
Ru. FIG. 11B shows an article inspection device according to the present invention.
FIG. 2 is a block circuit diagram showing a part of a fifth embodiment of the invention;
Ru. FIG. 11C shows an article inspection device according to the present invention.
FIG. 2 is a block circuit diagram showing a part of a fifth embodiment of the invention;
Ru. FIG. 12 is shown in FIGS. 11A to 11C.
This is a flowchart diagram for showing the operation of the fifth embodiment.
be. FIG. 13A shows an article inspection device according to the present invention.
FIG. 3 is a block circuit diagram showing a part of a sixth embodiment of the invention; FIG.
Ru. FIG. 13B shows an article inspection device according to the present invention.
FIG. 3 is a block circuit diagram showing a part of a sixth embodiment of the invention; FIG.
Ru. FIG. 13C shows an article inspection device according to the present invention.
FIG. 3 is a block circuit diagram showing a part of a sixth embodiment of the invention; FIG.
Ru. FIG. 14 is shown in FIGS. 13A to 13C.
This is a flowchart diagram for showing the operation of the sixth embodiment.
be. FIG. 15A is the same as that shown in FIGS. 1A to 1C.
First embodiment, second implementation shown in FIGS. 5A to 5C
Example, the third embodiment shown in FIGS. 7A to 7C, FIG. 9A
Fourth embodiment shown in FIGS. 9C to 9C, FIGS. 11A to 11A
11C and FIGS. 13A to 1
Explanation for explaining the operation of the sixth embodiment shown in 3C
In particular, on the front or back side of the article M to be inspected.
Generation of image signals P1 and P2 when foreign matter N is attached
It shows the biomechanism. FIG. 15B is the same as that shown in FIGS. 1A to 1C.
First embodiment, second implementation shown in FIGS. 5A to 5C
Example, the third embodiment shown in FIGS. 7A to 7C, FIG. 9A
Fourth embodiment shown in FIGS. 9C to 9C, FIGS. 11A to 11A
11C and FIGS. 13A to 1
Explanation for explaining the operation of the sixth embodiment shown in 3C
In particular, on the front or back side of the article M to be inspected.
Generation of image signals P1 and P2 when foreign matter N is attached
It shows the biomechanism. FIG. 16A is the same as that shown in FIGS. 1A to 1C.
First embodiment, second implementation shown in FIGS. 5A to 5C
Example, the third embodiment shown in FIGS. 7A to 7C, FIG. 9A
Fourth embodiment shown in FIGS. 9C to 9C, FIGS. 11A to 11A
11C and FIGS. 13A to 1
Explanation for explaining the operation of the sixth embodiment shown in 3C
In particular, on the front or back side of the article M to be inspected.
Generator of transmitted light signal P3 when foreign matter N is attached
It shows the sequence. FIG. 16B is the same as that shown in FIGS. 1A to 1C.
First embodiment, second implementation shown in FIGS. 5A to 5C
Example, the third embodiment shown in FIGS. 7A to 7C, FIG. 9A
Fourth embodiment shown in FIGS. 9C to 9C, FIGS. 11A to 11A
11C and FIGS. 13A to 1
Explanation for explaining the operation of the sixth embodiment shown in 3C
In particular, on the front or back side of the article M to be inspected.
Generator of transmitted light signal P3 when foreign matter N is attached
It shows the sequence. (Configuration of the first embodiment) First, with reference to FIGS. 1A to 3, the present invention will be described.
Regarding the first embodiment of the article inspection device according to the invention,
The configuration will be explained in detail. [0060] Overall configuration [0061] 10 is an article inspection device according to the present invention.
Then, the items to be inspected M are transported one by one in the direction of arrow A.
An article conveyance section 20 for
are arranged and transported by the article transport section 20.
Images are taken of the front and back sides of the inspected article M, respectively.
Outputs the results as image signals P1 and P2 and transports the article.
passed through the inspected article M being conveyed by the section 20.
Receives near-infrared rays and outputs the result as a transmitted light signal P3
It also includes an article imaging section 30 for outputting. inspected
The article M may be any article that can transmit near-infrared rays.
For example, there is dried seaweed. [0062] When the inspected article M is dried seaweed,
Foreign objects such as small shrimp, net scraps, straw scraps, or seaweed scraps N
may be mixed inside, or on the front or back side of the
It is often attached to the product and greatly affects its quality.
. Contamination of foreign matter N into the interior of dried seaweed can be detected by collecting it from the sea.
Raw sea that has undergone necessary treatments such as cleaning after being harvested
Form moss (i.e. undried seaweed) into a rectangular shape and
Place against the surface of the seaweed to dry
When cleaning the raw seaweed, some particles remained in the raw seaweed because they could not be removed by washing.
Small shrimp, net scum, straw scum, etc. are not exposed on the surface.
It mainly occurs when it is taken into the body. The adhesion of foreign matter N to the front or back side of dried seaweed is
(i) After being collected from the sea, any necessary cleaning treatment, etc.
Treated raw seaweed (i.e. undried seaweed),
In order to form the seaweed into a rectangular shape and dry it,
When placed against a surface, it cannot be removed by cleaning, etc.
Small shrimp, net scum, straw scum, etc. left in the raw seaweed are on the surface.
and (ii) seaweed microorganisms.
After the raw seaweed placed against the seaweed dries, the seaweed may be misplaced.
When the dried seaweed is peeled off from the previous dry seaweed,
Dried seaweed separated from dried seaweed and remaining on the surface of the seaweed misu
Small pieces of dried seaweed are peeled off from the surface of the seaweed.
It occurs by adhering to the back side. [0063] The article inspection device 10 according to the present invention also has the following features:
, is connected to the article imaging section 30, and the article imaging section
Image signals P1 and P2 output from 30 and transmitted light
By appropriately processing the signal P3, the inspected article M
If foreign matter N gets into the inside of the
Foreign matter inspection to detect whether foreign matter N is attached to the
It is provided with an exit part 40. Here, in the foreign object detection section 40,
The reason for processing the transmitted light signal P3 is (i)
This cannot be detected by simply monitoring changes in the wall thickness of the inspection article M.
(ii) to detect foreign substances that are difficult to detect;
Differences that are difficult to detect may occur depending on the processing of image signals P1 and P2.
object (for example, the brightness of the front or back surface of the object to be inspected M)
Makes it easier or more reliable to detect foreign objects (foreign objects whose brightness is lower than that of foreign objects)
There is something to do. The detection results of the foreign object detection section 40 are, for example,
It is disposed downstream of the article imaging section 30 in the article conveyance section 20.
The defective articles to be inspected (all
In other words, the object to be inspected has a relatively large amount of foreign matter N mixed in or attached to it.
goods; hereinafter the same) used to remove M+ individually.
It may also be given to the defect rate calculation unit 60 to determine the number of samples to be inspected.
The proportion of defective inspected articles M+ included in the article (i.e.,
In order to calculate and display or record the defective rate of inspected items.
It may be used for For convenience of explanation, foreign object inspection is not explained here.
The detection results of the output section 40 are sent to the defective article removal section 50 and the defective article removal section 50.
It is assumed that the present invention is given to the rate calculation unit 60.
There is no intention to limit it to this. [0065] Article conveying section 20 [0066] The article conveying section 20 includes a head pulley 21A.
and tail pulley 21B.
transport the items M to be inspected one by one in the direction of arrow A.
conveyor belt 21 and head pulley 22A for
It is arranged around the tail pulley 22B.
The arrow marks the inspected article M received from the conveyor belt 21.
Conveyor belt to convey one by one in direction A
22, head pulley 23A, and tail pulley 23B
The conveyor belt 22 is arranged around the
One by one, point the inspected articles M received from the factory in the direction of arrow A.
A conveyor belt 23 and a head pulley for conveying
Arranged around 24A and tail pulley 24B
The object to be inspected received from the conveyor belt 23
A controller for transporting items M one by one in the direction of arrow A.
There is a defect in the bare belt 24 and the downstream side of the conveyor belt 24.
The head pulley 25 is disposed through the article removing section 50 and
A and the tail pulley 25B.
The items that were not removed by the defective item removal section 50 are
The test article M is transferred to a subsequent processing device (e.g. packaging device;
Conveyor belt for transporting items one by one to
25. The delivery section of the conveyor belts 21 and 22 is
The passage of the inspected article M is easily detected by optical means.
They are spaced slightly apart from each other in order to In other words,
The distance between the head pulley 21A and the tail pulley 22B is
, the passage of the inspected article M can be easily detected by optical means.
Sufficient security is provided to enable this. The delivery section of the conveyor belts 22 and 23 is
Contaminated inside the inspected article M or on its surface or
Detection of foreign matter N attached to the back surface is performed close to the object to be inspected M.
slightly spaced apart from each other to achieve infrared transmission
has been done. In other words, the head pulley 22A and the tape
The distance to the pulley 23B is close to the article M to be inspected.
Sufficient space is provided to easily irradiate infrared rays.
. The delivery section of the conveyor belts 23 and 24 is
To ensure or facilitate imaging of the back side of the inspected article M
are separated from each other. In other words, the head pulley
The distance between 23A and tail pulley 24B is
Ample space is provided so that the back side of product M can be easily imaged.
There is. [0070] Article image capturing unit 30 [0071] The article image capturing unit 30 includes a conveyor belt 21,
22 is located near the delivery section and the conveyor belt
21, the object to be inspected M is pushed by the roller 3.
1A toward the head pulley 21A while optically
Detects and outputs article detection signals f1, f2, f3
A sensor 31 such as a CCD line sensor camera for
It is placed near the transfer section of the conveyor belts 22 and 23.
The conveyor belts 22 and 23 are connected to the transfer section.
One side of the conveyor belts 22, 23 (for example, the lower side)
Infrared irradiator (infrared light emitting diode) 32A
near infrared rays are irradiated with the conveyor belt 22.
In order to block near-infrared rays from the transported article M,
The transmitted light signal P is detected by detecting the amount of transmitted near-infrared light.
3 CCD line sensor camera to output as
Which sensor 32 is located above the conveyor belt 23?
It is connected to the sensor 31 and the article detection signal f1
The object being conveyed by the conveyor belt 23 according to the
A video camera or
is an imaging means 33 such as a CCD line sensor camera, and a controller.
It is placed below the transfer part of conveyor belts 23, 24.
It is connected to one sensor 31 and responds to the article detection signal f2.
conveyor belt 23 to conveyor belt 24
For capturing an image of the back side of the inspected article M being delivered.
video camera or CCD line sensor camera, etc.
and an imaging means 34. Article detection signals f1, f2
, f3 are the articles M to be inspected by the sensor 31, respectively.
It is generated with an appropriate delay from the detection time. [0072] The article imaging section 30 also uses fluorescent lamps, halogen lamps, etc.
formed by light-emitting lamps or light-emitting diodes, etc.
The conveyor belt 2 is arranged near the imaging means 33.
The surface of the article to be inspected M being conveyed by
A light source for generating light L to be irradiated (referred to as irradiation light)
33A and is arranged so as to surround the imaging means 33.
on the surface of the inspected article M or on the foreign matter N attached thereto.
light to suppress abnormal reflection (here specular reflection) caused by
The irradiated light L from the source 33A is scattered as scattered light L.
Articles to be inspected being transported by the conveyor belt 23
A scattering member 33B for providing light to M, and a light source 33A
and the scattering member 33B to block external light and
A shield to prevent the irradiated light L from leaking into the surrounding environment.
Light member 33C and fluorescent lamp, halogen lamp or light emitting lamp
The imaging means 34 is formed by a photodiode or the like.
from the conveyor belt 23 to the conveyor belt
From below, look at the back side of the inspected article M being conveyed to the tray 24.
A light source 3 for generating light L to be irradiated (referred to as irradiation light)
4A and are arranged so as to surround the imaging means 34.
Due to the back surface of the inspected item M or foreign matter N attached thereto.
The light source is designed to suppress abnormal reflection (here specular reflection).
The irradiated light L by 34A is scattered and is converted into scattered light L.
conveyed from the conveyor belt 23 to the conveyor belt 24
a scattering member 34B for giving to the inspected article M;
It surrounds the light source 34A and the scattering member 34B and is
Blocks light and prevents irradiated light L from leaking into the surrounding environment.
A light shielding member 34C for controlling the light is provided. here
, the imaging means 33 and 34 are inspected by the article transport section 20.
A shutter that operates at a speed corresponding to the conveyance speed of the article M.
If it does, it should be attached to the front or back side of the inspected item M.
Even if the attached foreign matter N becomes minute, it can be detected well.
Therefore, it is preferable. At this time, light sources 33A and 34A are
If fluorescent lamps are used, an inverter (not shown) is required.
If a high frequency voltage is applied between the electrodes via the
Irradiation is possible even if the shutter opening timings of means 33 and 34 are different.
This is preferable because the amount of light L can be maintained constant. Also,
The scattering members 33B and 34B are made of translucent chemical synthetic resin.
(For example, translucent acrylic resin)
Therefore, it is formed. The light shielding members 33C and 34C are
Since it is not an essential element for the present invention, it can be removed if desired.
You may. [0073] Foreign object detection section 40 [0074] First, the foreign object detection section 40 detects the image of the imaging means 33.
It is connected to the output terminal and is photographed by the imaging means 33.
Image signal P1 of the surface of the inspected article M that is imaged and output
The three primary color signals Q (i.e. red signal R, green signal
Three primary color signals for extracting signal G and blue-violet signal B)
Connect to the extraction circuit 41 and the three primary color signal extraction circuit 41
The three primary color signals given from the three primary color signal extraction circuit 41
Color signal Q (i.e. red signal R, green signal G and blue-violet
Brightness signal creation to create brightness signal Y from color signal B)
to the output terminal of the luminance signal generation circuit 42 and the luminance signal generation circuit 42.
The inverting input terminal is connected and the non-inverting input terminal is the setting circuit (Fig.
(not shown) and the brightness signal Y is connected to the setting circuit.
By determining whether or not the set value Y0 of
The high level is activated only when the brightness signal Y exceeds its set value Y0.
Ratio for outputting the brightness comparison signal Y+ that is in the bell state
A comparison circuit 43 is provided. The comparison circuit 43 compares the luminance signal Y with the set value Y0.
The reason for this is that the noise contained in the luminance signal Y is removed and the
To avoid misidentifying the irregularities on the surface of the inspection item M as foreign matter N.
It's in the area. The foreign object detection section 40 also extracts three primary color signals.
It is connected to the output end of the circuit 41 and the three primary color signals Q
(i.e. red signal R, green signal G and blue-violet signal B)
) to each other to obtain the three primary color sum signal X (=R+G+B)
Three primary color signal addition circuit 44 for producing three primary color signals
The output terminal of the addition circuit 44 and the three primary color signal extraction circuit 41
It is connected to the output terminal and outputs the three primary color signals Q (i.e.
Three primary colors: red signal R, green signal G and blue-violet signal B)
Relative chromaticity with respect to sum signal X (i.e. red relative chromaticity XR
=R/X, green relative chromaticity XG =G/X and blue-violet
Calculate the color relative chromaticity (XB = B/X) and compare the maximum value.
a division circuit 45 for outputting as a chromaticity signal X*;
, the inverting input terminal is connected to the output terminal of the divider circuit 45.
and the non-inverting input terminal is connected to the setting circuit (not shown).
and relative chromaticity signal X* (i.e. red relative chromaticity
XR, green relative chromaticity XG and blue-violet relative chromaticity XB
(the largest of these) exceeded the setting value of the setting circuit
By determining whether or not the relative chromaticity signal
It becomes a high level state only when it exceeds the set value X0.
Comparison circuit 46 for outputting relative chromaticity comparison signal X+
It is equipped with The comparison circuit 46 receives the relative chromaticity signal X*
The basis for comparing with the set value X0 is the relative chromaticity signal X*
The color of the surface of the inspected article M is removed by removing the noise contained in the
The purpose is to avoid misidentifying the deviation of the degree as a foreign substance N. The foreign object detection unit 40 further includes a comparison circuit 43,
46, the input terminal is connected to the comparison circuit 43.
The luminance comparison signal Y+ given from the comparator circuit 46
Combine the given relative chromaticity comparison signal X+ as appropriate.
Signal combination circuit for outputting as combination signal Z after setting
It is equipped with 47. The signal combination circuit 47 has two input terminals each serving as a comparison circuit.
It is connected to the output terminals of 43 and 46, and the brightness comparison signal Y
+ and relative chromaticity comparison signal X+, AND signal Y+
AND circuit 47A for creating + and two inputs.
The output terminals are connected to the output terminals of comparison circuits 43 and 46, respectively.
luminance comparison signal Y+ and relative chromaticity comparison signal X+
OR circuit to create the logical sum signal Y+ +X+
47B and the first to fourth switching contacts are respectively activated.
The output terminal of the second circuit 47A and the output terminal of the OR circuit 47B
is connected to the output terminal of the comparison circuit 43 and the output terminal of the comparison circuit 46.
are connected, and the common contact is used as the output terminal, and the AND signal Y
+X+ and OR signal Y+ +X+ and brightness comparison signal
A combination signal of either Y+ or relative chromaticity comparison signal X+
Equipped with a selector switch 47C for outputting as Z.
ing. [0077] The foreign object detection section 40 furthermore includes a signal combination circuit.
to the output end of the path 47 and the sensor 31 of the article imaging section 30.
and the set given from the signal combination circuit 47.
The pulse (i.e. high level state) included in the combined signal Z
The foreign matter N attached to the surface of the inspected article M is counted.
After outputting the counting result as the counting signal W, the subsequent inspection target
Generated by the sensor 31 as the article M is detected.
The counting contents are cleared in response to the article detection signal f1.
and a counting circuit 48 connected to the output terminal of the counting circuit 48.
The content of the counting signal W output from the counting circuit 48 (
In other words, it is determined whether the counting result) exceeds the predetermined value W0.
A foreign object detection signal V1 is generated when the value exceeds a predetermined value W0.
A foreign object detection signal generation circuit 49 is provided to generate a foreign object detection signal.
. Foreign object detection signal generated by the foreign object detection signal generation circuit 49
The output signal V1 is sent to the foreign object detection section 4 via the OR circuit 40A.
It is output as a detection result of 0, and here, it is output as a detection result of 0.
Defective article removal to individually remove inspected articles M+
section 50 and calculates the defective rate of the inspected article.
It is given to the defective rate calculation unit 60 for displaying or recording the calculated value.
is being given. [0078] In addition, the foreign object detection section 40 also includes the imaging means 34.
is connected to the output end of the image pickup means 34.
Image signal P of the back side of the inspected article M captured and output
2 is processed and the three primary color signals Q (i.e. red signal R, green signal
Three primary color signals for extracting signal G and blue-violet signal B)
number extraction circuit 141 and three primary color signal extraction circuit 141.
From the three primary color signal extraction circuit 141
Given the three primary color signals Q (i.e. red signal R, green signal
In order to create the luminance signal Y from the signal G and the blue-violet signal B),
luminance signal generation circuit 142 and luminance signal generation circuit 1
The inverting input terminal is connected to the output terminal of 42 and is non-inverting.
The input terminal is connected to a setting circuit (not shown) and the bright
Determine whether or not the temperature signal Y exceeds the setting value Y0 of the setting circuit.
By setting the brightness signal Y to exceed the set value Y0
The brightness comparison signal Y+ becomes high level only when
A comparison circuit 143 for outputting . ratio
The comparison circuit 143 compares the luminance signal Y with the set value Y0 and
The reason for this is that the noise contained in the luminance signal Y is removed and the
Avoid misidentifying irregularities on the surface of inspection item M as foreign matter N
There is something to do. In addition, the foreign matter detection section 40 also detects three primary color signals.
It is connected to the output terminal of the number take-out circuit 141.
Primary color signal Q (i.e. red signal R, green signal G and blue
The violet signal B) is added together to obtain the three primary color sum signal X (=R+
G+B) three primary color signal addition circuit 144
and the output terminal of the three primary color signal addition circuit 144 and the three primary color
It is connected to the output end of the signal extraction circuit 141.
Three primary color signals Q (i.e. red signal R, green signal G and
Relative chromaticity of the blue-violet signal B) with respect to the three primary color sum signal X
That is, red relative chromaticity XR = R/X, green relative chromaticity X
G = G/X and blue-violet relative chromaticity XB = B/X)
Calculate and output the maximum value as relative chromaticity signal
The division circuit 145 for dividing the output of the division circuit 145 and the output of the division circuit 145
The inverting input terminal is connected to the terminal, and the non-inverting input terminal is set to
connected to a constant circuit (not shown) to provide a relative chromaticity signal.
No. X* (i.e. red relative chromaticity XR, green relative chromaticity X
G and blue-violet relative chromaticity XB) is
To determine whether or not the set value X0 of the setting circuit has been exceeded.
The relative chromaticity signal X* exceeds its set value X0.
The relative chromaticity comparison signal X+ becomes high level only when
A comparison circuit 146 for outputting . The comparison circuit 146 sets the relative chromaticity signal X* to the set value X0.
The basis for comparison is included in the relative chromaticity signal
Removes noise and changes the chromaticity deviation on the surface of the inspected article M.
The purpose is to avoid misidentification as object N. The foreign object detection section 40 also includes a comparison circuit 14.
The input terminal is connected to 3,146 and the comparison circuit
Brightness comparison signal Y+ given from 143 and comparison circuit
Apply the relative chromaticity comparison signal X+ given from 146.
After combining as desired, output as combined signal Z.
A signal combination circuit 147 is provided. Signal combination circuit 14
7, the two input terminals are the comparison circuits 143 and 14, respectively.
It is connected to the output terminal of 6 and is in phase with the brightness comparison signal Y+.
Create an AND signal Y+ X+ with the chromaticity comparison signal X+.
AND circuit 147A for forming the
connected to the output terminals of comparison circuits 143 and 146, respectively.
The relative luminance comparison signal Y+ and the relative chromaticity comparison signal X+
OR circuit 1 for creating logical sum signal Y+ +X+
47B and the first to fourth switching contacts are connected to each other.
Comparison between the output end of circuit 147A and the output end of OR circuit 147B
The output terminal of the comparator circuit 143 and the output terminal of the comparator circuit 146
and the common contact is used as the output terminal for logical product communication.
Compare the brightness with the signal Y+ X+ and the logical sum signal Y+ +X+
Either the signal Y+ or the relative chromaticity comparison signal X+ is combined.
A selector switch 147C for outputting as a combined signal Z.
It is equipped with [0081] The foreign object detection section 40 also has a signal combination.
The output end of the circuit 147 and the sensor 3 of the article imaging section 30
1 and is supplied from the signal combination circuit 147.
The pulses included in the resulting combined signal Z (i.e. high level
foreign matter attached to the surface of the inspected article M.
After counting N and outputting the counting result as the counting signal W,
As the next article M to be inspected is detected, the sensor 31
The counting contents are clicked according to the article detection signal f2 generated by
Counting circuit 148 and Counting circuit 148
It is connected to the output terminal of the counting circuit 148 and is output from the counting circuit 148.
The content of the counted signal W (that is, the counting result) is the predetermined value W
When it is determined whether or not it exceeds 0 and exceeds the predetermined value W0
Foreign object detection signal generation to generate foreign object detection signal V2
A circuit 149 is provided. Foreign object detection signal generation circuit 1
The foreign object detection signal V2 generated by 49 is
Output as the detection result of the foreign object detection section 40 via the circuit 40A.
Here, the defective inspected article M+ is individually
Separately, it is given to the defective article removal section 50 for removal, and
Calculate and display or record the defective rate of the inspected item
It is given to the defective rate calculation unit 60 for calculating the defective rate. The foreign object detecting section 40 receives a signal from the sensor 32.
The transmitted light signal P3 is set to a setting value of a setting circuit (not shown).
Compared with T0, if the set value T0 is not reached, the inspected object
If a foreign substance N gets inside the product M, or if the surface or
Foreign object detection signal V3 indicating that foreign object N is attached to the back side
A comparison circuit 241 is provided for generating the signal. Comparison episode
The foreign object detection signal V3 generated by the path 241 is
The detection result of the foreign object detection section 40 is passed through the OR circuit 40A.
Here, the defective inspected article M+
is given to the defective article removal section 50 for individually removing the
, and calculate and display the defective rate of the inspected item.
It is given to the defective rate calculation unit 60 for recording. [0083] Defective article removing section 50 [0084] The defective article removing section 50 is a part of the article conveying section 20.
Arranged between conveyor belt 24 and conveyor belt 25
The switching fin 51 and the difference are connected via the OR circuit 40A.
Foreign object detection signal generation circuits 49, 149 and
is connected to the comparator circuit 241 and receives the foreign object detection signal.
In accordance with at least one of No. V1, V2, V3
A driving member (for example, a solenoid) for driving the switching fin 51
removed by the lenoid coil) 52 and the switching fin 51.
A storage box for accommodating the defective inspection object M+
53 and is located downstream of the switching fin 51 and is defective.
Inspected articles that were not removed as inspected articles M+
M is moved from the switching fin 51 toward the conveyor belt 25.
It is provided with a transfer pulley 54 for causing the transfer. [0085] Defective rate calculation section 60 [0086] The defective rate calculation section 60 calculates the number of foreign object detection signal generation times.
49 and the sensor 31, and the foreign object detection signal V
1, V2, V3 occurrence times and article detection signal f3
After counting the number of occurrences of each, the foreign object detection signal V1,
The counting result of the number of occurrences of V2 and V3 is sent to the article detection signal f3.
The defect of the inspected item is calculated by dividing the result of counting the number of occurrences.
The calculation circuit 61 for calculating the yield rate and the calculation circuit 61
connected and the calculation result (i.e. the defectiveness of the inspected item)
a display device 62 for displaying the yield rate) and a calculation circuit 61
is connected to the calculated result (i.e. of the inspected item).
and a recording device 63 for recording the defective rate).
. Incidentally, the defective rate calculation unit 60 may be
and either the display device 62 or the recording device 63
May be removed. In addition, the defect calculated by the defective rate calculation unit 60
The yield rate is used for grading the goods to be inspected. (Operation of the first embodiment) Furthermore, FIGS. 1A to 4 and 15A
16B, the article inspection device according to the present invention
The operation of the first embodiment of the device will be explained in detail.
. [0090] Imaging of the inspected article M [0091] The sensor 31 of the article imaging section 30
The product M is transported by the conveyor belt 21 of the product transport section 20.
After being conveyed in the direction of mark A, it is transported by roller 31A.
Let's move towards the conveyor belt 22 while being held down.
In doing so, the article M to be inspected is detected and the article detection signal f is
(i.e. f1, f2, f3) (step 1
). [0092] The image capturing means 33 of the article image capturing section 30
When the knowledge signal f1 is given, the surface of the inspected article M is photographed.
Start imaging and send the imaging result as image signal P1
(Step 2). In the vicinity of the imaging means 33, the light source 33A
Therefore, the generated irradiation light L is scattered by the scattering member 33B.
After being scattered, it is distributed on the conveyor belt 23 as scattered light l.
Since the object to be inspected M is irradiated from above, the conveyor
The surface of the inspected article M on the belt 23 and the inspected article M
When reflected by a foreign object N attached to the surface of the
Compared to the light amount of normal reflection (here specular reflection) Rf,
Abnormal reflection (here, specular reflection) R on the surface of the inspection article M
The amount of light at f* can be sufficiently reduced. others
Therefore, the image signal P1 increases significantly in response to only the foreign object N.
The level state becomes H. [0094] The image capturing means 34 of the article image capturing section 30
When the knowledge signal f2 is given, the back side of the item M to be inspected is photographed.
Start imaging and send the imaging result as image signal P2
(Step 2). In the vicinity of the imaging means 34, the light source 34A
Therefore, the generated irradiation light L is scattered by the scattering member 34B.
After being scattered, it leaves the conveyor belt 23 as scattered light l.
The object to be inspected M being moved to the conveyor belt 24 is
Since the irradiation is from the direction, the light is emitted from the conveyor belt 23.
The upper article to be inspected M being moved to the conveyor belt 24
Reflected by foreign matter N attached to the back surface and the back surface of the inspected article M
normal reflection (here, specular reflection) at the foreign body N.
) Abnormality on the back side of the inspected article M compared to the light intensity of Rf
Sufficiently reduce the amount of reflected (regular reflection here) Rf* light.
You can Therefore, the image signal P2 is
Only in response to N, the state becomes a significantly high level state H. [0096] Extraction of the three primary color signals Q [0097] The image signal P1 of the article M to be inspected is
The signal is applied to the three primary color signal extraction circuit 41 of the output section 40. Mihara
The color signal extraction circuit 41 extracts three primary color signals from the image signal P1.
signal Q (i.e. red signal R, green signal G and blue-violet signal)
No. B) is taken out, and the luminance signal generation circuit 42 and the three primary color signals are
Output to adder circuit 44 and divider circuit 45 (step
Step 2). The image signal P2 of the article M to be inspected is
The signal is applied to the three primary color signal extraction circuit 141 of the output section 40. In the three primary color signal extraction circuit 141, from the image signal P2
Three primary color signals Q (i.e. red signal R, green signal G and
The blue-violet signal B) is taken out and the luminance signal generation circuit 142
, three primary color signal addition circuit 144 and division circuit 145
(Step 2). Luminance signal Y/luminance comparison signal Y+ 010
0] The luminance signal generation circuit 42 generates the three primary color signals Q (i.e.
red signal R, green signal G and blue-purple signal B) are
numbers α, β, γ (however, α+β+γ=1; 0≦α, β, γ
≦1), mutually as Y=αR+βG+γB
The sum is added to form a luminance signal Y (step 3). here
, coefficients α, β, γ are, for example, α=γ=0.25 and
and β=0.5. [0101] The luminance signal Y is appropriately delayed.
Then, it is output to the comparison circuit 43 (step 4). The comparison circuit 43 sets the luminance signal Y to a setting circuit (
(not shown) is compared with the set value Y0 set by
High only when the brightness signal Y is larger than the set value Y0.
Generates and outputs a brightness comparison signal Y+ that is in a level state.
(Step 5). The luminance signal generation circuit 142 generates three primary color signals.
signal Q (i.e. red signal R, green signal G and blue-violet signal)
No. B) is the coefficient α, β, γ (however, α+β+γ=1;0
≦α, β, γ≦1), Y=αR+βG+γB
are added to each other to form a luminance signal Y (step
3). Here, the coefficients α, β, and γ are, for example, α=γ=
0.25 and β=0.5. [0104] The luminance signal Y is appropriately delayed.
Then, it is outputted to the comparison circuit 143 (step 4
). The comparison circuit 143 converts the luminance signal Y into a set number of times.
Compare with the set value Y0 set by the road (not shown)
When the luminance signal Y is larger than the set value Y0,
Generates and outputs a brightness comparison signal Y+ that is at a high level.
(Step 5). Relative chromaticity signal X* - Relative chromaticity comparison signal X
+0107 In the three primary color signal addition circuit 44, the three primary color signals
signal Q (i.e. red signal R, green signal G and blue-violet signal)
After the numbers B) are added together, the three primary color sum signals
It is output (step 6). [0108] Outputted by the three primary color signal addition circuit 44,
The three primary color sum signal X is given to the division circuit 45. division
In the circuit 45, the three primary color signal Q(
i.e. red signal R, green signal G and blue-violet signal B)
by dividing its relative chromaticity (i.e. red relative
Chromaticity XR, green relative chromaticity XG and blue-violet relative chromaticity X
B) is generated (step 7). Relative chromaticity calculated by division circuit 45
(i.e. red relative chromaticity XR, green relative chromaticity XG and
and blue-violet relative chromaticity (XB), only the maximum is the relative color.
It is applied to the comparator circuit 46 as a degree signal X*. The comparison circuit 46 sets the relative chromaticity signal X*.
The set value X0 set by a constant circuit (not shown) and
The comparison result is calculated as a relative chromaticity signal from the set value X0.
A relative color that is in a high level state only when No.X* is large.
output as a degree comparison signal X+ (step 8). In the three primary color signal addition circuit 144, the three primary color
Signal Q (i.e. red signal R, green signal G and blue-violet signal
After the signals B) are added together, the three primary color sum signals
is output (step 6). Output by the three primary color signal addition circuit 144
The resulting three primary color sum signal X is given to the divider circuit 145.
Ru. In the division circuit 145, the three primary color sum signals
Primary color signal Q (i.e. red signal R, green signal G and blue
By dividing the violet signal B), its relative chromaticity (i.e.
Red relative chromaticity XR, green relative chromaticity XG and blue-violet
The color relative chromaticity (XB) is generated (step 7). [0113] The relative value calculated by the division circuit 145
Chromaticity (i.e. red relative chromaticity XR, green relative chromaticity XG
and blue-violet relative chromaticity XB), only the maximum one is
Provided to comparison circuit 146 as chromaticity signal X*
. The comparison circuit 146 receives the relative chromaticity signal X*
set value X0 set by a setting circuit (not shown)
and compare the comparison result with the relative color from the setting value X0.
A phase that becomes high level only when the degree signal X* is large.
It is output as a chromaticity comparison signal X+ (step 8). [0115] Combined signal Z [0116] Luminance comparison generated by comparison circuit 43
The relative chromaticity generated by signal Y+ and comparator circuit 46
The comparison signal X+ is given to the signal combination circuit 47 and is
After being combined as desired, it is output as a combination signal Z (step
9). For the combination signal Z, the common contact of the changeover switch 47C is the first
or depending on which switching contact is touched among the fourth switching contacts.
Then, the AND signal Y+ X+ and the OR signal Y+ +X+
and the luminance comparison signal Y+ and the relative chromaticity comparison signal X+.
It is considered to be one of the selected signals. Luminance generated by comparison circuit 143
The comparison signal Y+ generated by the comparison circuit 146
The relative chromaticity comparison signal X+ refers to the signal combination circuit 147.
After being combined appropriately, output as combined signal Z
(Step 9). Combination signal Z is selector switch 1
The common contact of 47C is the one connected among the first to fourth switching contacts.
Depending on the touched switching contact, the AND signal Y+
Relative to logical sum signal Y+ +X+ and brightness comparison signal Y+
Any signal selected from the chromaticity comparison signal X+
It is said to be the number. [0118] Count of foreign objects N [0119] Detection result of sensor 31, that is, article detection signal
The number f (here f1) is given to the counting circuit 48, and
Counting contents of the counting circuit 48 corresponding to the inspected article M to be inspected
(Step 10). [0120] After being reset, the counting circuit 48 receives a signal.
The parameter included in the combination signal Z given from the signal combination circuit 47
(i.e. high level state) and
The number of foreign substances N adhering to the surface of is counted (step 10). The counting circuit 48 receives the signal from the sensor 31.
A subsequent article detection signal f (here f1) is given.
The counting operation continues until (step 11). sand
That is, the counting circuit 48 detects the subsequent article from the sensor 31.
When a signal f (here f1) is given, its counting behavior
The process is finished (steps 10 and 11). [0122] The detection result of the sensor 31, that is, the article detection signal
The signal f (here f2) is given to the counting circuit 148.
, the counting circuit 148 corresponding to the preceding article M to be inspected.
The counting contents are reset (step 10). After the counting circuit 148 is reset,
, included in the combined signal Z given from the signal combination circuit 147.
count and test the pulses (i.e. high level state)
Count the foreign substances N attached to the surface of the inspection article M (step
10). The counting circuit 148 receives the signal from the sensor 31.
The subsequent article detection signal f (here f2) is given.
The counting operation continues until the number is reached (step 11). That is, the counting circuit 148 receives the following information from the sensor 31.
When the article detection signal f (here f2) is given, the
The counting operation ends (steps 10 and 11). [0125] Generation of foreign object detection signals V1, V2, V3 [
The foreign object detection signal generation circuit 49 includes a counting circuit 48
The counting result W given from is larger than the set value W0
It is determined whether or not (step 12). In other words, foreign matter
The detection signal generation circuit 49 (i) determines that the counting result W is the set value;
If it is larger than W0, a foreign object detection signal V1 is generated.
, and (ii) the counting result W is smaller than the set value W0
, the foreign object detection signal V1 is not generated (step 12
). [0127] Further, the foreign object detection signal generation circuit 149 is
The counting result W given from the counting circuit 148 is the set value W
Determine whether it is greater than 0 (step 12)
. That is, the foreign object detection signal generation circuit 149 performs (i)
If the counting result W is larger than the set value W0, foreign object detection is performed.
The output signal V2 is generated, and (ii) the counting result W is set.
If it is smaller than the value W0, a foreign object detection signal V2 is generated.
No (step 12). In addition, the comparison circuit 241
The transmitted light signal P3 given from is lower than the set value T0.
It is determined whether or not it is small (step 12). sand
That is, the comparison circuit 241 (i) transmits the transmitted light signal P3
is smaller than the set value T0, the foreign object detection signal V3
(ii) The transmitted light signal P3 is set to the set value T0.
If it is larger than , foreign object detection signal V3 is not generated.
(Step 12) Foreign object detection signals V1, V2, V3 are OR
The detection result of the foreign object detection unit 40 is detected through the circuit 40A.
Provided to the non-defective item removal unit 50 and defective rate calculation unit 60
(Step 14). [0130] Removal of defective inspected article M+ 0131
] Foreign object detection signals V1, V2, V3 from the foreign object detection section 40
When at least one of
When set to 0, it is driven according to foreign object detection signals V1, V2, and V3.
The member 52 switches the switching fin 51 to
That is, the defective inspection object M+) is stored in the storage box 53.
(Step 13). Foreign object detection signals V1, V from the foreign object detection section 40
2. When neither V3 is given, it is considered defective.
In the product removing section 50, the driving member 52 switches the switching fin 51.
The item M to be inspected is transferred to the transfer pulley 54 without being replaced.
from the switching fin 51 toward the conveyor belt 24.
I am forced to send it. [0133] Calculation of defective rate [0134] Foreign matter detection signals V1, V from the foreign matter detection section 40
2.Defect rate calculation regardless of whether V3 is given or not.
In the output section 60, a calculation circuit 61 outputs foreign object detection signals V1, V
2. Number of occurrences of V3 and article given from sensor 31
After counting the number of occurrences of the detection signal f3,
The counting results of foreign object detection signals V1, V2, and V3 are used to detect objects.
By dividing by the counting result of signal f3,
The defect rate of the inspected articles is calculated (step 14). [0135] Test object calculated by calculation circuit 61
The defective rate of the product is displayed on the display device 62 and also recorded.
The information to be inspected is recorded by the recording device 63.
It is used to judge the quality of the article (step 15). (Configuration and operation of second embodiment) 0137
] In addition, FIGS. 5A to 6 and 15A to 1
6B, the second article inspection device according to the present invention
The structure and operation of the embodiment will be explained in detail.
Ru. [0138] In the second embodiment, in the foreign object detection section 40,
, three primary color signal addition circuit 44; 144 or signal combination circuit
47; 147 is removed, and the comparator circuit 43;
The output terminal is directly connected to the input terminal of the counting circuit 48;
It has the same configuration as the first embodiment except that it is connected.
are doing. Therefore, in the second embodiment, the comparator circuit 4
3; Included in the brightness comparison signal Y+ generated in 143.
Only the pulses (i.e. high level states) that are
The counting circuit 48; 148 counts and responds to the counting result.
The defective inspected article M+ is removed, and the inspected article
Same as the first example except that the defective rate is calculated.
It has one effect. [0140] Therefore, for the sake of brevity, here,
In addition, to the members or steps included in the first embodiment,
For corresponding parts or steps, the first embodiment and
Other configurations and
The explanation of the effect will be omitted. (Configuration and operation of third embodiment) 0142
] In addition, FIGS. 7A to 8 and FIGS. 15A to 8
Referring to FIG. 16B, the article inspection device according to the present invention
The structure and operation of the third embodiment will be explained in detail.
I will clarify. [0143] In the third embodiment, in the foreign object detection section 40,
, luminance signal generation circuit 42; 142, comparison circuit 43; 14
3 and the signal combination circuit 47; 147 are removed and the ratio
The output terminal of the comparison circuit 46;146 is connected to the counting circuit 48;148.
Same as the first embodiment except that it is directly connected to the
It has one configuration. Therefore, in the third embodiment, the comparator circuit 4
6; Pulse of relative chromaticity comparison signal X+ outputted by 146
(i.e., high level state), each counting circuit 4
8; Count by 148 and determine the defect according to the counting result.
of the inspected articles M+ are removed, and the defective rate of the inspected articles is
Same effect as the first embodiment, except that it is calculated by calculating
is doing. [0145] Therefore, for the sake of brevity, here,
In addition, to the members or steps included in the first embodiment,
For corresponding parts or steps, the first embodiment and
Other configurations and
The explanation of the effect will be omitted. (Configuration of Fourth Embodiment) First, refer to FIGS. 9A to 9B and FIG.
With this in mind, the fourth embodiment of the article inspection device according to the present invention
The configuration will be explained in detail. [0148] In the fourth embodiment, the foreign object detection section 40 has the following functions.
The structure is the same as that of the first embodiment except that it is formed as shown in FIG.
It has a certain amount of structure. [0149] That is, the foreign object detection section 40
It is connected to the output terminal of 3 and is captured by the imaging means 33.
Image signal P1 of the inspected article M captured and outputted by
is processed appropriately and delayed by the delay circuit 35A.
Product detection signal f1 (this is called delayed product detection signal f1M)
), the three primary color signals Q (i.e. red signal R, green signal
Three primary color signals for extracting signal G and blue-violet signal B)
It is equipped with an extraction circuit 341. Three primary color signal extraction circuit 3
41 is the image signal P according to the delayed article detection signal f1M.
1 to red signal R, green signal G and blue-violet respectively.
Red signal extraction circuit 341A1 for extracting signal B,
Green signal extraction circuit 341B1 and blue-purple signal extraction circuit
road 341C1, red signal extraction circuit 341A1, green
Signal extraction circuit 341B1 and blue-violet signal extraction circuit 3
Each is connected to the output terminal of 41C1, and the red
Clamp the color signal R, green signal G and blue-violet signal B appropriately.
clamp circuits 341A2, 341B2,
341C2 and clamp circuits 341A2, 341B2
, 341C2, and are connected to the output terminals of 341C2 as appropriate.
Red signal R, green signal G and blue-violet signal clamped to
Amplification circuit 341A3, 3 for appropriately amplifying signal B
41B3, 341C3. [0150] The foreign object detection section 40 also extracts three primary color signals.
It is connected to the output terminal of circuit 341 and receives the three primary color signals.
signal Q (i.e. red signal R, green signal G and blue-violet signal)
B) are added together to obtain the three primary color sum signal X (=R+G+B
) for creating the three primary color signal addition circuit 342;
Connected to the output terminal of the primary color signal extraction circuit 341
The three primary color signals Q (i.e. red signal R, green signal G and
and blue-violet signal B).
Comparison circuit 3 for outputting signals gR, gG, gB
43. Gate signals gR, gG, gB
is usually 1, but when the corresponding three primary color signals Q are maximum
It is set to 0 when [0151] The foreign object detection section 40 further extracts three primary color signals.
Output terminal of circuit 341 and three primary color signal addition circuit 342
is connected to the output terminal of the
That is, red signal R, green signal G and blue-violet signal B).
Chromaticity signal for the primary color sum signal X (i.e. relative chromaticity signal
)XQ (i.e. red relative chromaticity signal XR = R/X,
Green relative chromaticity signal XG = G/X and blue-violet relative color
Division circuit 34 for calculating degree signal XB = B/X)
4A1, 344B1, 344C1 and division circuit 344
Connect to the output terminal of A1, 344B1, 344C1
and relative chromaticity signal XQ (i.e. red relative chromaticity
Signal XR, green relative chromaticity signal XG and blue-violet relative color
The desired coefficients α, β, and γ are respectively set for the degree signal
Multiply the coefficientd relative chromaticity signal (i.e. the coefficientd red relative
Chromaticity signal αXR, green relative chromaticity signal with coefficient βXG and
To calculate the blue-violet relative chromaticity signal γXB) with
multiplication circuits 344A2, 344B2, 344C2,
Output of multiplier circuits 344A2, 344B2, 344C2
connected to the terminal and the output terminal of the comparator circuit 343.
Multiplying circuit 3 according to gate signals gR, gG, gB
Multiplication result of 44A2, 344B2, 344C2 (all
In other words, relative chromaticity signals with coefficients αXR, βXG, γXB)
Gate circuits 345A and 345B for allowing the
, 345C, and gate circuits 345A, 345B, 345
The gate circuit 345A is connected to the output terminal of C.
, 345B, 345C.
Add each other to obtain the relative chromaticity sum signal X** as X**={gR
αXR +gG βXG +gB γXB }/X
Addition circuit 346 for calculating
The inverting input terminal is connected to the output terminal of 46 and the non-inverting
The input terminal is connected to the setting circuit (not shown).
The relative chromaticity sum signal X** exceeds the setting value X0 of the setting circuit.
By determining whether or not the relative chromaticity sum signal X*
High level state only when * exceeds its set value X0
Comparison circuit for outputting relative chromaticity sum comparison signal Z
347. Here, the comparison circuit 347
The root that compares the relative chromaticity sum signal X** with the set value X0
The method is to remove noise contained in the relative chromaticity sum signal X**.
, the deviation in chromaticity on the surface of the inspected article M is mistakenly recognized as a foreign substance N.
There is a way to avoid that. [0152] In addition, the foreign object detection section 40 includes a comparison circuit 34.
The input terminal is connected to the output terminal of 7, and the comparator circuit
Included in the relative chromaticity sum comparison signal Z given from 347
The detected pulses (i.e. high level state) are counted and
Count the number of foreign substances N contained in product M and calculate the counting results.
After outputting as several signals W, the subsequent inspected article M is detected.
The article detection signal generated by the sensor 31
Counting circuit 34 whose counting contents are cleared in response to No. f3
8 and connected to the output terminal of the counting circuit 348.
Contents of count signal W output from cage count circuit 348
(i.e., the counting result) exceeds the predetermined value W0.
Foreign object detection signal V1 is detected when the predetermined value W0 is exceeded.
Equipped with a foreign object detection signal generation circuit 349 for generating
It is growing. Generated by foreign object detection signal generation circuit 349
The foreign object detection signal V1 is passed through the OR circuit 40B.
It is output as the detection result of the foreign object detection section 40, and here
Now, let's take a look at how to individually remove defective inspected articles M+.
If the defective article is given to the defective article removal section 50 and is inspected,
Defective rate calculation to calculate and display or record the rate
Section 60. [0153] In contrast to the above, the foreign object detection section 40
It is connected to the output terminal of 34 and is connected to the output terminal of
Image signal P2 of the inspected article M imaged and output
is processed appropriately and delayed by the delay circuit 35B.
Article detection signal f2 (this is called delayed article detection signal f2M)
), the three primary color signals Q (i.e. red signal R, green signal
Three primary color signals for extracting signal G and blue-violet signal B)
It is equipped with a number retrieval circuit 441. Three primary color signal extraction circuit
441 is an image signal according to the delayed article detection signal f2M.
Red signal R, green signal G and blue-purple from P2 respectively
Red signal extraction circuit 441A1 for extracting color signal B
, green signal extraction circuit 441B1 and blue-purple signal extraction
Circuit 441C1, red signal extraction circuit 441A1, green
Color signal extraction circuit 441B1 and blue-violet signal extraction circuit
Each is connected to the output end of 441C1.
Click the red signal R, green signal G, and blue-purple signal B as appropriate.
Clamp circuit 441A2, 441B2 for lamp
, 441C2 and clamp circuits 441A2, 441B
2,441C2 are connected to the output terminals and are suitable.
Red signal R, green signal G and blue-purple clamped together
an amplifier circuit 441A3 for appropriately amplifying the color signal B;
441B3, 441C3. [0154] The foreign object detection section 40 also extracts three primary color signals.
It is connected to the output terminal of circuit 441 and receives the three primary color signals.
signal Q (i.e. red signal R, green signal G and blue-violet signal)
B) are added together to obtain the three primary color sum signal X (=R+G+B
) for creating three primary color signal addition circuits 442;
Connected to the output terminal of the primary color signal extraction circuit 441
The three primary color signals Q (i.e. red signal R, green signal G and
and blue-violet signal B).
Comparison circuit 4 for outputting signal gR, gG, gB
43. Gate signals gR, gG, gB
is usually 1, but when the corresponding three primary color signals Q are maximum
It is set to 0 when [0155] The foreign object detection unit 40 further extracts three primary color signals.
Output terminal of circuit 441 and three primary color signal addition circuit 442
is connected to the output terminal of the
That is, red signal R, green signal G and blue-violet signal B).
Chromaticity signal for the primary color sum signal X (i.e. relative chromaticity signal
)XQ (i.e. red relative chromaticity signal XR = R/X,
Green relative chromaticity signal XG = G/X and blue-violet relative color
Division circuit 44 for calculating degree signal XB = B/X)
4A1, 444B1, 444C1 and division circuit 444
Connect to the output end of A1, 444B1, 444C1
and relative chromaticity signal XQ (i.e. red relative chromaticity
Signal XR, green relative chromaticity signal XG and blue-violet relative color
The desired coefficients α, β, and γ are respectively set for the degree signal
Multiply the coefficientd relative chromaticity signal (i.e. the coefficientd red relative
Chromaticity signal αXR, green relative chromaticity signal with coefficient βXG and
To calculate the blue-violet relative chromaticity signal γXB) with
multiplication circuits 444A2, 444B2, 444C2, and
Output of multiplication circuit 444A2, 444B2, 444C2
connected to the terminal and the output terminal of the comparator circuit 443.
The multiplier circuit 4 responds to the gate signals gR, gG, and gB.
Multiplication result of 44A2, 444B2, 444C2 (all
In other words, relative chromaticity signals with coefficients αXR, βXG, γXB)
Gate circuits 445A and 445B for passing through
, 445C, and gate circuits 445A, 445B, 445
Gate circuit 445A is connected to the output terminal of C.
, 445B, 445C.
Add each other to obtain the relative chromaticity sum signal X** as X**={gR
αXR +gG βXG +gB γXB }/X
Addition circuit 446 and addition circuit 4 for calculating
The inverting input terminal is connected to the output terminal of 46 and the non-inverting
The input terminal is connected to the setting circuit (not shown).
The relative chromaticity sum signal X** exceeds the setting value X0 of the setting circuit.
By determining whether or not the relative chromaticity sum signal X*
High level state only when * exceeds its set value X0
Comparison circuit for outputting relative chromaticity sum comparison signal Z
347. Here, the comparison circuit 447
The root that compares the relative chromaticity sum signal X** with the set value X0
The method is to remove noise contained in the relative chromaticity sum signal X**.
, the deviation in chromaticity on the surface of the inspected article M is mistakenly recognized as a foreign substance N.
There is a way to avoid that. [0156] In addition, the foreign object detection section 40 includes a comparison circuit 44.
The input terminal is connected to the output terminal of 7, and the comparator circuit
Included in the relative chromaticity sum comparison signal Z given from 447
The detected pulses (i.e. high level state) are counted and
Count the number of foreign substances N contained in product M and calculate the counting results.
After outputting as several signals W, the subsequent inspected article M is detected.
The article detection signal generated by the sensor 31
Counting circuit 44 whose counting contents are cleared in response to No. f3
8 and connected to the output terminal of the counting circuit 448.
Contents of counting signal W output from cage counting circuit 448
(i.e., the counting result) exceeds the predetermined value W0.
Foreign object detection signal V2 is detected when the predetermined value W0 is exceeded.
Equipped with a foreign object detection signal generation circuit 449 for generating
It is growing. Generated by foreign object detection signal generation circuit 449
The foreign object detection signal V2 is passed through the OR circuit 40B.
It is output as the detection result of the foreign object detection section 40, and here
Now, let's take a look at how to individually remove defective inspected articles M+.
If the defective article is given to the defective article removal section 50 and is inspected,
Defective rate calculation to calculate and display or record the rate
Section 60. [0157] The foreign object detecting section 40 receives a signal from the sensor 32.
The transmitted light signal P3 is set to a setting value of a setting circuit (not shown).
Compared with T0, if the set value T0 is not reached, the inspected object
If a foreign substance N gets inside the product M, or if the surface or
Foreign object detection signal V3 indicating that foreign object N is attached to the back side
A comparison circuit 541 is provided for generating the signal. Comparison episode
The foreign object detection signal V3 generated by the path 541 is
The detection result of the foreign object detection section 40 is passed through the OR circuit 40B.
Here, the defective inspected article M+
is given to the defective article removal section 50 for individually removing the
, and calculate and display the defective rate of the inspected item.
It is given to the defective rate calculation unit 60 for recording. [0158] (Operation of the fourth embodiment) [0159] Furthermore, FIGS. 9A to 10, FIG.
15A to 16B, according to the present invention
Regarding the fourth embodiment of the product inspection device, its operation will be explained in detail.
explain. [0160] Imaging of the inspected article M [0161] The sensor 31 of the article imaging section 30
The product M is transported by the conveyor belt 21 of the product transport section 20.
After being conveyed in the direction of mark A, it is transported by roller 31A.
Let's move towards the conveyor belt 22 while being held down.
In doing so, the article M to be inspected is detected and the article detection signal f is
(i.e. f1, f2, f3) (step
1). [0162] The image capturing means 33 of the article image capturing section 30
When the knowledge signal f1 is given, the surface of the inspected article M is photographed.
Start imaging and send the imaging result as image signal P1
(Step 2). [0163] In the vicinity of the imaging means 33, the light source 33A
Therefore, the generated irradiation light L is scattered by the scattering member 33B.
After being scattered, it is distributed on the conveyor belt 23 as scattered light l.
Since the object to be inspected M is irradiated from above, the conveyor
The surface of the inspected article M on the belt 23 and the inspected article M
When reflected by a foreign object N attached to the surface of the
Compared to the light amount of normal reflection (here specular reflection) Rf,
Abnormal reflection on the surface of the inspection article M (here, specular reflection)
The amount of Rf* light can be sufficiently reduced. this
Therefore, the image signal P1 is significantly affected only by the foreign object N.
It becomes a high level state H. [0164] Also, the article detection signal output from the sensor 31
f1 is caused by the delay circuit 35A when the inspected article M is an object.
It is necessary to pass near the imaging means 33 of the product imaging section 30.
Delayed goods will be delayed accordingly depending on the time
The detection signal is set as f1M (step 3). [0165] The image capturing means 34 of the article image capturing section 30
When the knowledge signal f2 is given, the back side of the item M to be inspected is photographed.
Start imaging and send the imaging result as image signal P2
(Step 2). [0166] In the vicinity of the imaging means 34, the light source 34A
Therefore, the generated irradiation light L is scattered by the scattering member 34B.
After being scattered, it leaves the conveyor belt 23 as scattered light l.
The object to be inspected M being moved to the conveyor belt 24 is
Since the irradiation is from the direction, the light is emitted from the conveyor belt 23.
The back side of the inspected article M being moved to the conveyor belt 24
and reflected by the foreign matter N attached to the back surface of the inspected article M.
When the normal reflection (here regular reflection) R at the foreign object N
Compared to the light intensity of f, the abnormal reaction on the back surface of the inspected article M
The light amount of Rf* (here, specular reflection) is sufficiently reduced.
can be done. Therefore, the image signal P2 is
The state becomes a significantly high level state H in response to only this. [0167] Also, the article detection signal output from the sensor 31
f2 is determined by the delay circuit 35B when the inspected article M is
It is necessary to pass near the imaging means 34 of the product imaging section 30.
Delayed goods will be delayed accordingly depending on the time
The detection signal is set as f2M (step 3). [0168] Extraction of the three primary color signals Q [0169] The image signal P1 of the article M to be inspected is
Red included in the three primary color signal extraction circuit 341 of the output section 40
Signal extraction circuit 341A1, green signal extraction circuit 341B1
and given to the blue-violet signal extraction circuit 341C1
. [0170] Red signal extraction circuit 341A1, green signal extraction circuit
Output circuit 341B1 and blue-violet signal extraction circuit 341C
1 is the three primary color signal Q (i.e. red) from the image signal P1.
Take out the color signal R, green signal G and blue-violet signal B)
, when the delayed article detection signal f1M is given, the clamp
Out toward circuits 341A2, 341B2, 341C2
(Step 4). [0171] Clamp circuit 341A2, 341B2, 3
41C2 are red signal R, green signal G and blue signal respectively.
After appropriately clamping the purple signal B, the amplifier circuit 341
A3, 341B3, 341C3 (output to
Step 5). [0172] Amplifier circuit 341A3, 341B3, 341
C3 is a clamp circuit 341A2, 341B2, 34
Red signal R, green signal appropriately clamped at 1C2
After suitably amplifying G and blue-violet signal B,
, addition circuit 342 , comparison circuit 343 and division circuit
344A1, 344B1, 344C1
(Step 6). In contrast to the above, the image signal P2 of the article M to be inspected
is the three primary color signal extraction circuit 441 of the foreign object detection section 40.
Included red signal extraction circuit 441A1, green signal extraction circuit
circuit 441B1 and blue-violet signal extraction circuit 441C1
given to. [0174] Red signal extraction circuit 441A1, green signal extraction circuit
Output circuit 441B1 and blue-violet signal extraction circuit 441C
1 is the three primary color signal Q (i.e. red) from the image signal P2.
Take out the color signal R, green signal G and blue-violet signal B)
, when the delayed article detection signal f2M is given, the clamp
Out toward circuits 441A2, 441B2, 441C2
(Step 4). [0175] Clamp circuit 441A2, 441B2, 4
41C2 are red signal R, green signal G and blue signal respectively.
After appropriately clamping the purple signal B, the amplifier circuit 441
A3, 441B3, 441C3 (output to
Step 5). [0176] Amplifier circuit 441A3, 441B3, 441
C3 is the clamp circuit 441A2, 441B2, 44
Red signal R, green signal appropriately clamped at 1C2
After suitably amplifying G and blue-violet signal B,
, addition circuit 442 , comparison circuit 443 and division circuit
444A1, 444B1, 444C1
(Step 6). [0177] Calculation of three primary color sum signal X [0178] The addition circuit 342 is a three primary color signal extraction circuit.
341 output terminal (i.e. amplifier circuit 341A3, 34
1B3, 341C3 output terminal)
Signal Q (i.e. red signal R, green signal G and blue-violet signal
By adding the signals B) to each other, the three primary color sum signal X
=R+G+B is calculated (step 7). On the other hand, the addition circuit 442
The output terminal of the signal extraction circuit 441 (i.e., the amplifier circuit 44
1A3, 441B3, 441C3 output terminal)
The three primary color signals Q (i.e. red signal R, green signal G
and blue-violet signal B) by adding them together.
Calculate the primary color sum signal X (=R+G+B) (step
7). Calculation of relative chromaticity signals XR, XG, XB [
[0181] Division circuits 344A1, 344B1, 344C
1, the output terminal of the three primary color signal extraction circuit 341
That is, the amplifier circuits 341A3, 341B3, 341C3
The three primary color signals Q (i.e. red signal) given from the
No. R, green signal G and blue-violet signal B) are added to the adder circuit 34.
2 The three primary color sum signal X (=R+G+B) given from
By dividing by
That is, red relative chromaticity signal XR = R/X, green relative chromaticity
Signal XG = G/X and blue-violet relative chromaticity signal XB =
B/X) is calculated (step 8). Relative chromaticity signal XQ (that is, red relative color
chromaticity signal XR, green relative chromaticity signal XG and blue-violet phase
The chromaticity signal
2,344C2 is multiplied by appropriate coefficients α, β, and γ.
As a result, relative chromaticity signals with coefficients αXR, βX
G and γXB (step 9). Coefficients α, β,
γ is appropriate depending on the difference in color between the inspected article M and the foreign matter N.
To be decided accordingly. On the other hand, the division circuits 444A1, 444
B1,444C1, three primary color signal extraction circuit 441
(i.e., the amplifier circuits 441A3, 441B3,
The three primary color signals Q (
i.e. red signal R, green signal G and blue-violet signal B)
The three primary color sum signal X (
=R+G+B), the relative chromaticity signal is calculated by dividing by
No. XQ (i.e. red relative chromaticity signal XR = R/X,
Green relative chromaticity signal XG = G/X and blue-violet relative chromaticity
A signal XB =B/X) is calculated (step 8). Relative chromaticity signal XQ (that is, red relative color
chromaticity signal XR, green relative chromaticity signal XG and blue-violet phase
The chromaticity signal
2,444C2 is multiplied by appropriate coefficients α, β, and γ.
As a result, relative chromaticity signals with coefficients αXR, βX
G and γXB (step 9). Coefficients α, β,
γ is appropriate depending on the difference in color between the inspected article M and the foreign matter N.
To be decided accordingly. [0185] Relative comparison of three primary color signals R, G, B 018
6] In the comparison circuit 343, the three primary color signal extraction circuit 341
output terminal (i.e. amplifier circuit 341A3, 341B3
, 341C3 output terminal)
(i.e. red signal R, green signal G and blue-violet signal B)
) are compared with each other, and the gate signal g is determined according to the comparison result.
Output R, gG, and gB (steps 10 and 11). Gate signals gR, gG, gB are the corresponding three primary color signals
It is usually assumed to be 1, except that it becomes 0 when Q is maximum.
There is. On the other hand, in the comparison circuit 443, Mihara
The output terminal of the color signal extraction circuit 441 (i.e., the amplifier circuit 4
41A3, 441B3, 441C3)
The obtained three primary color signals Q (i.e. red signal R, green signal
G and blue-violet signal B) are compared with each other, and the comparison result is
Outputs gate signals gR, gG, gB according to
Steps 10 and 11). The gate signals gR, gG, gB are
, it becomes 0 when the corresponding three primary color signals Q are maximum.
It is usually set to 1, except for [0188] Calculation of relative chromaticity sum signal X** [0189]
Output from multiplication circuits 344A2, 344B2, 344C2
Relative chromaticity signals with coefficients αXR, βXG, γXB
In the gate circuits 345A, 345B, 345C,
, appropriately selected by gate signals gR, gG, gB.
(that is, the gate signals gR, gG, gB are multiplied by
) is then applied to the adder circuit 346 (step 1
2). In the adder circuit 346, the gate circuit 345
Relative chromaticity signal with coefficients passed through A, 345B, 345C
αXR, βXG, γXB are added to each other, and the relative chromaticity
Sum signal X** (=gR αXR +gG βXG +
gB γXB ) (step 13)
. The relative chromaticity sum signal X** is sent to the comparison circuit 347
from the setting circuit (not shown).
It is compared with the set value X0 given to the non-inverting input terminal.
(Step 14). Comparison result in comparison circuit 347
The result is output as a relative chromaticity sum comparison signal Z. On the other hand, the multiplication circuits 444A2, 444
Relative chromaticity signal with coefficient output from B2,444C2
αXR, βXG, γXB are gate circuits 445A, 4
45B, 445C, gate signals gR, gG, g
B (i.e., the gate signal gR
, gG, gB), then the adder circuit 446
(step 12). In the addition circuit 446, the gate circuit 445
Relative chromaticity signal with coefficients passed through A, 445B, 445C
αXR, βXG, γXB are added to each other, and the relative chromaticity
Sum signal X** (=gR αXR +gG βXG +
gB γXB ) (step 13)
. The relative chromaticity sum signal X** is sent to the comparison circuit 447
from the setting circuit (not shown).
It is compared with the set value X0 given to the non-inverting input terminal.
(Step 14). Comparison result in comparison circuit 447
The result is output as a relative chromaticity sum comparison signal Z. [0195] Counting of foreign matter N [0196] The counting circuit 348 is the comparator circuit 347
The pulse included in the relative chromaticity sum comparison signal Z given by
In other words, the surface of the inspected article M is counted by counting the
The number of foreign substances N attached to the substrate is counted (step 15). [0197] The counting circuit 348 is connected from the sensor 31 to
The counting operation continues until the article detection signal f3 is given.
(Step 16). That is, the counting circuit 34
8 is when the subsequent article detection signal f3 is given from the sensor 31.
When the count is reached, the counting operation is finished and the counting result W is output.
and reset the count contents. On the other hand, the counting circuit 448
included in the relative chromaticity sum comparison signal Z given from path 447.
The pulses (i.e., high level conditions) that are detected are counted and tested.
Count the number of foreign substances N attached to the back side of article M (step
15). That is, the counting circuit 448
1 until the subsequent article detection signal f3 is given.
The counting operation continues (step 16). [0199] The counting circuit 448 is connected from the sensor 31 to
When the article detection signal f3 is given, the counting operation
After completing the calculation, output the counting result W, and
reset the contents. [0200] Generation of foreign object detection signals V1, V2, V3 [
[0201] The foreign object detection signal generation circuit 349 is a counting circuit.
The counting result W given from 348 is from the set value W0.
It is determined whether or not the value is also larger (step 17). Sunawa
The foreign object detection signal generation circuit 349 performs (i) counting result.
When the output W is larger than the set value W0, the foreign object detection signal V
1, and (ii) the counting result W is the set value W0.
If it is smaller than , the foreign object detection signal V1 is not generated (
Step 17). [0202] Furthermore, the foreign object detection signal generation circuit 449 is as follows:
The counting result W given from the counting circuit 448 is the set value W
Determine whether it is greater than 0 (step 17)
. That is, the foreign object detection signal generation circuit 449 performs (i)
If the counting result W is larger than the set value W0, foreign object detection is performed.
The output signal V2 is generated, and (ii) the counting result W is set.
If it is smaller than the value W0, a foreign object detection signal V2 is generated.
No (step 17). In addition, the comparison circuit 541
The transmitted light signal P3 given from is lower than the set value T0.
It is determined whether or not it is small (step 17). sand
That is, the comparison circuit 541 (i) transmits the transmitted light signal P3
is smaller than the set value T0, the foreign object detection signal V3
(ii) The transmitted light signal P3 is set to the set value T0.
If it is larger than , foreign object detection signal V3 is not generated.
(Step 17) Foreign object detection signals V1, V2, V3 are OR
The detection result of the foreign object detection unit 40 is detected through the circuit 40B.
Provided to the non-defective item removal unit 50 and defective rate calculation unit 60
(Step 18). [0205] Removal of defective inspected article M+0206
] Foreign object detection signals V1, V2, V3 from the foreign object detection section 40
When at least one of
When set to 0, it is driven according to foreign object detection signals V1, V2, and V3.
The member 52 switches the switching fin 51 to
That is, the defective inspection object M+) is stored in the storage box 53.
(Step 18). Foreign object detection signals V1, V from the foreign object detection section 40
2. When neither V3 is given, it is considered defective.
In the product removing section 50, the driving member 52 switches the switching fin 51.
The item M to be inspected is transferred to the transfer pulley 54 without being replaced.
from the switching fin 51 toward the conveyor belt 24.
is sent (step 19). [0208] Calculation of defective rate [0209] Foreign object detection signals V1, V from the foreign object detection section 40
2.Defect rate calculation regardless of whether V3 is given or not.
In the output section 60, a calculation circuit 61 outputs foreign object detection signals V1, V
2. Number of occurrences of V3 and article given from sensor 31
After counting the number of occurrences of the detection signal f3,
The counting results of foreign object detection signals V1, V2, and V3 are used to detect objects.
By dividing by the counting result of signal f3,
The defect rate of the inspected articles is calculated (step 20). [0210] Test object calculated by calculation circuit 61
The defective rate of the product is displayed on the display device 62 and also recorded.
The information to be inspected is recorded by the recording device 63.
It is used to judge the quality of the article (step 21). (Configuration and operation of fifth embodiment) 0212
] In addition, FIGS. 11A to 12B and FIG. 15A.
16B, the article inspection device according to the present invention
Regarding the fifth embodiment of the device, its configuration and operation will be explained in detail.
Explain. Here, for convenience, the color of the inspected article M is
A strong red color and a foreign substance (the item M to be inspected is dried seaweed)
N is the object to be inspected.
Compared to product M, it has a green or blue-purple tinge, with a red hue.
Detection of foreign matter N without using chromaticity signal XR
Let's explain when it can be executed. [0213] In the fifth embodiment, the comparison circuit 343;
, division circuit 344A1; 444A1, multiplication circuit 344A
2; 444A2 and gate circuits 345A, 345B
, 345C; 445A, 445B, 445C were removed.
It has the same configuration as the fourth embodiment except that
Ru. [0214] Therefore, in the fifth embodiment, the green relative color
chromaticity signal XG and blue-violet relative chromaticity signal XB are tested.
Appropriate ratio depending on the difference in color between article M and foreign matter N
to create a relative chromaticity sum signal X** by adding them together.
Except for this, the operation is the same as that of the fourth embodiment. [0215] Therefore, for the sake of brevity, here,
In addition, to the members or steps included in the fourth embodiment
For corresponding members or steps, the fourth embodiment and
Other configurations and
A detailed explanation of the action will be omitted. [0216] In the above, the red relative chromaticity signal
Although the case where XR is not used has been explained, the present invention
is not limited to this, and is different from the inspected article M.
Green relative chromaticity signal XG A depending on the difference in color from object N
Or even if the blue-violet relative chromaticity signal XB is not used.
Inclusive. (Configuration and operation of the sixth embodiment) 0218
]Also, with reference to FIGS. 13A to 16B, the present invention
Regarding the sixth embodiment of the article inspection device according to the present invention,
The structure and operation will be explained in detail. Here, for convenience,
The color of the inspected article M is strongly red and blue-purple, and
The foreign substance N is greenish compared to the inspected article M, and is red.
Relative chromaticity signal XR and blue-violet relative chromaticity signal XB
Regarding the case where foreign material N can be detected without using
I will explain. [0219] In the sixth embodiment, the comparison circuit 343;
, division circuit 344A1, 344C1; 444A1, 44
4C1, multiplication circuit 344A2, 344C2; 444A2
, 444C2 and gate circuits 345A, 345B,
345C; addition to 445A, 445B, 445C
The fourth
It has the same configuration as the embodiment. [0220] Therefore, in the sixth embodiment, the green relative color
The color difference between the inspected article M and the foreign object N is expressed as
The relative chromaticity signal X* is amplified at an appropriate rate depending on the difference.
It has the same effect as the fourth embodiment except for creating
ing. [0221] Therefore, here, for the sake of brevity,
In addition, to the members or steps included in the fourth embodiment
For corresponding members or steps, the fourth embodiment and
Other configurations and
A detailed explanation of the action will be omitted. [0222] In the above, the red relative chromaticity signal
XR and blue-violet relative chromaticity signal XB are not used
Although the case has been described, the present invention is limited to this case.
Red relative chromaticity signal XR and green relative
Chromaticity signal XG or green relative chromaticity signal XG and
This also includes cases where the blue-violet relative chromaticity signal XB is not used.
ing. (Modification) [0224] In the above, the sensor 32 receives the transmitted light signal P3.
We have explained the case where the signal is output as an analog signal.
, the present invention is not limited to this, but can be applied to transmitted optical signals.
No. P3 as a digital signal (i.e. on/off signal)
It is also included when outputting as . In this case, compare
The circuit 241 may be omitted. [0225] Also, the defective rate calculation unit 60 detects foreign matter.
Foreign object detection signals V1, V2, V3 given from section 40
However, the present invention does not distinguish between
Not limited to foreign object detection signals V1, V2, V
3 may be counted individually, and the foreign object detection signal V1
, V2, V3 may be selected and counted. this
When the foreign object detection signals V1, V2, and V3 are
It is sufficient to arrange calculation circuits for each. (Summary of Examples) [0227] The article inspection device 10 according to the present invention
A foreign object is found in the inspected article M being transported by the transport section 20.
We are inspecting to see if N is mixed in or attached to it.
obtained when near-infrared rays are irradiated to the inspected article M.
The low level state of transmitted light signal P3 is counted and inspected.
Count the foreign matter N mixed in or attached to the article M, and check the counting result.
A foreign object detection signal V3 is generated when the value exceeds a predetermined value.
Accordingly, the defective inspection object M+ can be removed or inspected.
It can be used to calculate the defective rate of inspected items, etc.
(i) Remove foreign matter N that has entered or adhered to the inspected item M.
It can be detected without using the eye, and (ii)
Depending on the thickness of the product, remove foreign matter that has entered or adhered to the product.
(iii) inspection.
It is possible to reduce the number of personnel, and in addition, (iv)
The accuracy of inspection can be improved. [0228] The article inspection device 10 according to the present invention also has the following features:
, the inspected article M being conveyed by the article conveying section 20
Inspect whether foreign matter N has entered or adhered to the
In particular, (a) irradiating near-infrared rays to the article M to be inspected;
The low level state of the transmitted optical signal P3 obtained when
Count and measure the foreign matter N mixed in or attached to the inspected item M.
When the counting result exceeds a predetermined value, a foreign object detection signal V is output.
3, and (b) the surface of the article to be inspected M and
From image signals P1 and P2 obtained by imaging the back side, respectively.
The extracted three primary color signals Q (i.e. red signal R, green signal
Based on the signal G and the blue-violet signal B), the luminance signal Y and
Create at least one of the relative chromaticity signals
48; 148 to provide a luminance signal Y and a relative chromaticity signal
Test by counting high level state of at least one of X*
Count the foreign matter N attached to the front or back surface of the inspected article M.
, when the counting result W exceeds the predetermined value W0, a foreign object detection signal is sent.
Removal of defective inspected articles M+ due to occurrence of issues V1 and V2
It can be used to calculate the defective rate of inspected items.
Therefore, in addition to (i) to (iv) above, (v)
Do not approach the optical characteristics of the front or back surface of the item to be inspected.
However, only image signals P1 and P2 have inferior optical characteristics.
This makes it possible to inspect even foreign substances that are difficult to detect, and even (
vi) It is possible to further improve the inspection accuracy of the article to be inspected. [0229] The article inspection device 10 according to the present invention further includes:
, the inspected article M being conveyed by the article conveying section 20
It is inspected to see if there are any foreign substances mixed in or attached to it.
In particular, (a) irradiating near-infrared rays to the article M to be inspected;
The low level state of the transmitted optical signal P3 obtained when
Count the foreign matter N that has entered or adhered to the inspected item M.
When the counting result exceeds a predetermined value, a foreign object detection signal V3 is generated.
and (b) the front and back surfaces of the inspected article M.
from the image signals P1 and P2 obtained by imaging respectively.
The three primary color signals Q (i.e. red signal R, green signal
Red relative chromaticity signal XR based on G and blue-violet signal B)
, green relative chromaticity signal XG and blue-violet relative chromaticity signal
Create one or two of
Add and count as appropriate depending on the difference in color between M and foreign material N.
circuit 348; 448 and count its high level state.
Foreign matter N attached to the front or back surface of the inspected article M
, and if the counting result W exceeds the predetermined value W0,
By generating the foreign object detection signals V1 and V2,
Removal of good inspected article M+ or defective inspected article
The above (i) can be used for calculation of ratios, etc.
In addition to ~(vi), (vii) adheres to the inspected article M.
Using the difference in color between the foreign matter N and the article M to be inspected,
(viii) of the inspected article M.
It is possible to improve the efficiency of foreign substance inspection, and at the same time (i
x) Achieving qualified foreign object inspection according to the properties of the inspected article M
can. Effects of the Invention As is clear from the above, the present invention has advantages.
The product inspection equipment that
, as mentioned as the first solution,
Transmitted light signal P3 obtained when near-infrared rays are irradiated
This process prevents foreign matter from entering or attaching to the inspected item
(i) Remove any foreign matter that has entered or adhered to the inspected item.
It has the effect of being detectable without using the eye, and (
ii) Remove any foreign matter that has entered or adhered to the item to be inspected.
It has the effect of being able to be detected regardless of the wall thickness of the
(iii) In addition to the effect of reducing the number of inspection personnel,
(iv) Improving the inspection accuracy of inspected items
It has the effect of [0231] The article inspection device according to the present invention also has the above features.
In the [Means for solving problems] column, please enter the 2nd to 13th options.
As mentioned above as a solution, the surface of the item to be inspected or
processes the image signals P1 and P2 obtained from the back side.
Inspects whether foreign matter is attached to the inspected item by
In addition, when near-infrared rays are irradiated to the item to be inspected.
By processing the transmitted light signal P3 obtained in
Inspect whether foreign matter is mixed in or attached to the inspected items.
Therefore, in addition to the effects (i) to (iv) above, (v
) Contact the optical characteristics of the front or back surface of the item to be inspected.
It has similar or inferior optical characteristics and cannot be detected using image signals alone.
It has the effect of making it possible to inspect even difficult foreign substances, and
(vi) further improve the inspection accuracy of inspected items;
It has the effect that it can. [0232] The article inspection device according to the present invention further comprises:
Please enter the 5th to 7th solutions in the [Means for solving the problem] column above.
Listed as a means of resolution and the 11th to 13th means of resolution.
As mentioned above, the optical characteristics of the inspected article and the optical characteristics of foreign objects are
Based on the difference between the
Processing of image signals P1 and P2 obtained from
Therefore, in addition to the effects (i) to (vi) above, (
vii) Distinguish foreign matter attached to the inspected article from the inspected article.
It has the effect of making it detectable by using the color difference between
and (viii) improve the time efficiency of foreign matter inspection of inspected articles.
(ix) foreign matter inspection that is suitable according to the properties of the inspected article;
It has the effect of achieving the following.

[Brief explanation of the drawing]

FIG. 1A is a block circuit diagram showing a part of a first embodiment of an article inspection device according to the present invention.

FIG. 1B is a block circuit diagram showing a part of a first embodiment of the article inspection device according to the present invention.

FIG. 1C is a block circuit diagram showing a part of a first embodiment of the article inspection device according to the present invention.

FIG. 2 is a partially cutaway perspective view showing an enlarged part of the first embodiment shown in FIGS. 1A to 1C.

FIG. 3 is a partial block circuit diagram for enlarging and showing a part of the first embodiment shown in FIGS. 1A to 1C.

FIG. 4 is a flowchart showing the operation of the first embodiment shown in FIGS. 1A to 1C.

FIG. 5A is a block circuit diagram showing a part of a second embodiment of the article inspection device according to the present invention.

FIG. 5B is a block circuit diagram showing a part of a second embodiment of the article inspection device according to the present invention.

FIG. 5C is a block circuit diagram showing a part of a second embodiment of the article inspection device according to the present invention.

FIG. 6 is a flowchart showing the operation of the second embodiment shown in FIGS. 5A to 5C.

FIG. 7A is a block circuit diagram showing a part of a third embodiment of the article inspection device according to the present invention.

FIG. 7B is a block circuit diagram showing a part of a third embodiment of the article inspection device according to the present invention.

FIG. 7C is a block circuit diagram showing a part of a third embodiment of the article inspection device according to the present invention.

FIG. 8 is a flowchart showing the operation of the third embodiment shown in FIGS. 7A to 7C.

FIG. 9A is a block circuit diagram showing a part of a fourth embodiment of the article inspection device according to the present invention.

FIG. 9B is a block circuit diagram showing a part of a fourth embodiment of the article inspection device according to the present invention.

FIG. 9C is a block circuit diagram showing a part of a fourth embodiment of the article inspection device according to the present invention.

FIG. 10 is a flowchart showing the operation of the fourth embodiment shown in FIGS. 9A to 9C.

FIG. 11A is a block circuit diagram showing a part of a fifth embodiment of the article inspection device according to the present invention.

FIG. 11B is a block circuit diagram showing a part of a fifth embodiment of the article inspection device according to the present invention.

FIG. 11C is a block circuit diagram showing a part of a fifth embodiment of the article inspection device according to the present invention.

FIG. 12 is a flowchart showing the operation of the fifth embodiment shown in FIGS. 11A to 11C.

FIG. 13A is a block circuit diagram showing a part of a sixth embodiment of the article inspection device according to the present invention.

FIG. 13B is a block circuit diagram showing a part of a sixth embodiment of the article inspection device according to the present invention.

FIG. 13C is a block circuit diagram showing a part of a sixth embodiment of the article inspection device according to the present invention.

FIG. 14 is a flowchart showing the operation of the sixth embodiment shown in FIGS. 13A to 13C.

15A] A first embodiment shown in FIGS. 1A to 1C, a second embodiment shown in FIGS. 5A to 5C, a third embodiment shown in FIGS. 7A to 7C, and FIGS. 9A to 9C; 9C
FIG. 12 is an explanatory diagram for explaining the operation of the fourth embodiment shown in FIG. 1, the fifth embodiment shown in FIGS.

15B: the first embodiment shown in FIGS. 1A to 1C, the second embodiment shown in FIGS. 5A to 5C, the third embodiment shown in FIGS. 7A to 7C, and FIGS. 9A to 15B; 9C
FIG. 12 is an explanatory diagram for explaining the operation of the fourth embodiment shown in FIG. 1, the fifth embodiment shown in FIGS.

16A] A first embodiment shown in FIGS. 1A to 1C, a second embodiment shown in FIGS. 5A to 5C, a third embodiment shown in FIGS. 7A to 7C, and FIGS. 9A to 16A. 9C
FIG. 12 is an explanatory diagram for explaining the operations of the fourth embodiment shown in FIG.

16B: the first embodiment shown in FIGS. 1A to 1C, the second embodiment shown in FIGS. 5A to 5C, the third embodiment shown in FIGS. 7A to 7C, and FIGS. 9A to 16B; 9C
FIG. 12 is an explanatory diagram for explaining the operation of the fourth embodiment shown in FIG. 1, the fifth embodiment shown in FIGS.

[Explanation of symbols]

Claims (19)

[Claims] Claim 1: An article inspection device for inspecting whether or not foreign matter is mixed in or attached to an article to be inspected that is being conveyed by an article conveying section, comprising: An infrared irradiator (32A
), and (b) a sensor () which is arranged at a distance on the back side or front side of the inspected article and which receives the near infrared rays transmitted through the inspected article and outputs the light reception result as a transmitted light signal P3. 32) and (c) The input end is connected to the output end of the sensor (32), and it is determined whether the transmitted light signal P3 is less than the set value and the transmitted light signal P3 is set to the set value. and a foreign matter detection signal generation circuit (241) for generating a foreign matter detection signal V3 which becomes a high level state only when the condition is satisfied and indicates that a foreign matter is mixed in or attached to the object to be inspected. Features of article inspection equipment. Claim 2: Inspecting whether or not foreign matter is attached to the inspected article by processing an image signal obtained by imaging the inspected article being conveyed by the article conveying section by an article imaging section. In the article inspection device, (a) a first three primary color signal extraction circuit (41) for extracting three primary color signals R, G, and B from an image signal P1 obtained from the surface of the article to be inspected; (b) a first The input terminal is connected to the output terminal of the three primary color signal extraction circuit (41), and is used to create a luminance signal Y from the three primary color signals R, G, and B given from the first three primary color signal extraction circuit (41). The first luminance signal generation circuit (
42) and (c) the input terminal is connected to the output terminal of the first luminance signal generation circuit (42), and determines whether the luminance signal Y exceeds a set value and outputs the luminance signal Y. Brightness comparison signal Y+ becomes high level only when exceeding the set value
(d) The input terminal is connected to the output terminal of the first comparison circuit (43) for outputting the high level luminance comparison signal Y+. a first counting circuit (48) for counting foreign matter attached to the surface of the inspected article by counting the state;
and (e) the input terminal is connected to the output terminal of the first counting circuit (48), and when the counting result of the first counting circuit (48) exceeds a predetermined value, the surface of the article to be inspected is (f) an image signal P2 obtained from the back side of the inspected article;
The input terminal is connected to the output end of the second three primary color signal extraction circuit (141) for extracting the three primary color signals R, G, and B from (g) the second three primary color signal extraction circuit (141). , the three primary color signals R and G given from the second three primary color signal extraction circuit (141)
, a second luminance signal generation circuit (142) for generating the luminance signal Y from , B, and (h) an input terminal connected to the output terminal of the second luminance signal generation circuit (142) a second comparator circuit for determining whether or not the luminance signal Y exceeds a set value and outputting a luminance comparison signal Y+ that becomes a high level state only when the luminance signal Y exceeds the set value;
143) and (i) the input terminal is connected to the output terminal of the second comparator circuit (143), and by counting the high level state included in the brightness comparison signal Y+, the back side of the object to be inspected is detected. A second counting circuit (1
48) and (j) the input terminal is connected to the output terminal of the second counting circuit (148), and when the counting result of the second counting circuit (148) exceeds a predetermined value, the inspected article (k) a second foreign matter detection signal generation circuit (149) for generating a second foreign matter detection signal V2 indicating that a foreign matter is attached to the back surface of the article to be inspected; (1) An infrared irradiator (32A) which is arranged at a distance and is used to irradiate near-infrared rays from the front side or the back side of the object to be inspected; (m) a sensor (32) for receiving near-infrared rays transmitted through the inspected article and outputting the reception result as a transmitted light signal P3; and (m) an input end for the output end of the sensor (32). is connected, it is determined whether or not the transmitted light signal P3 is less than the set value, and only when the transmitted light signal P3 is less than the set value, it becomes a high level state to prevent foreign matter from entering the inspected item. Third foreign object detection signal V3 indicating adhesion
A third foreign object detection signal generation circuit (241
) An article inspection device comprising: 3. The luminance signal Y is expressed as αR + βG + γB using three coefficients α, β, γ whose sum is 1 and has a value of 0 or more and 1 or less and three primary color signals R, G, B. 3. The article inspection device according to claim 2, characterized in that: 4. Inspecting whether or not foreign matter is mixed in or attached to the inspected article by processing an image signal obtained by imaging the inspected article being conveyed by the article conveying section by the article imaging section. In an article inspection device consisting of (a
) a first three primary color signal extraction circuit (41) for extracting the three primary color signals R, G, and B from the image signal P1 obtained from the surface of the object to be inspected; (b) a first three primary color signal extraction circuit (41) The input terminal is connected to the output terminal of the first three primary color signal extraction circuit (41), and the first three primary color signals R, G, B given from the first three primary color signal extraction circuit (41) are added together to create a three primary color sum signal X. (c) The input terminal is connected to the output terminal of the first three primary color signal addition circuit (41) and the output terminal of the first three primary color signal addition circuit (44). By dividing the three primary color signals R, G, and B by the three primary color sum signal X, the three primary color signals R,
a first division circuit (45) for calculating the relative chromaticity XR, XG, and XB of G and B and outputting the maximum value as a relative chromaticity signal X*; and (d) a first division circuit. Circuit (45)
The input terminal is connected to the output terminal of , and it is determined whether the relative chromaticity signal (e) The input end is connected to the output end of the first comparison circuit (46), and the relative color A first counting circuit (4
8) and (f) the input terminal is connected to the output terminal of the first counting circuit (48), and the first counting circuit (48)
When the counting result exceeds a predetermined value, a first foreign matter detection signal V1 indicates that a foreign matter is attached to the surface of the inspected article.
A first foreign object detection signal generation circuit (49) for generating
and (g) image signal P2 obtained from the back side of the article to be inspected.
The input terminal is connected to the output end of the second three primary color signal extraction circuit (141) for extracting the three primary color signals R, G, and B from (h) the second three primary color signal extraction circuit (141). , the three primary color signals R and G given from the second three primary color signal extraction circuit (141)
, B to each other to create the three primary color sum signal X; and (i) the output terminal of the second three primary color signal extraction circuit (141) and the second three primary color signal. The input terminal is connected to the output terminal of the adding circuit (144), and the three primary color signals R, G,
Calculates the relative chromaticity XR, XG, XB of the three primary color signals R, G, B by dividing B by the three primary color sum signal The input terminals are connected to the output terminals of the calculation circuit (145) and (j) the second division circuit (145), and it is determined whether the relative chromaticity signal X* exceeds the set value. a second comparison circuit (146) for outputting a relative chromaticity comparison signal X+ that becomes a high level state only when the relative chromaticity signal X* exceeds a set value; and (k) a second comparison circuit. The input terminal is connected to the output terminal of (146), and the input terminal is connected to the output terminal of 2 counting circuit (148) and (l) 2nd counting circuit (148)
The input terminal is connected to the output terminal of the second counting circuit (148), and when the counting result of the second counting circuit (148) exceeds a predetermined value, a second counting circuit (148) is connected to the output terminal of the second counting circuit (148), which indicates that foreign matter is mixed in or attached to the inspected article. a second foreign object detection signal generation circuit (149) for generating a foreign object detection signal V2; or an infrared irradiator (32A) for irradiating near-infrared rays from the back side; and (n) an infrared ray irradiator (32A) that is placed spaced apart on the back side or front side of the inspected article and receives near-infrared rays that have passed through the inspected article. sensor (32) for outputting the light reception result as a transmitted light signal P3.
), and (o) the input end is connected to the output end of the sensor (32), and it is determined whether the transmitted light signal P3 is less than the set value and whether the transmitted light signal P3 satisfies the set value. The third foreign object detection signal V3 becomes a high level state only when there is no foreign object, indicating that foreign objects are mixed in or attached to the inspected article.
A third foreign object detection signal generation circuit (241
) An article inspection device comprising: 5. Inspecting whether or not foreign matter is mixed in or attached to the inspected article by processing an image signal obtained by imaging the inspected article being conveyed by the article conveying section by the article imaging section. In an article inspection device consisting of (a
) a first three primary color signal extraction circuit (41) for extracting the three primary color signals R, G, and B from the image signal P1 obtained from the surface of the object to be inspected; (b) a first three primary color signal extraction circuit (41) The input terminal is connected to the output terminal of the first luminance signal generation circuit for producing a luminance signal Y from the three primary color signals R, G, and B given from the first three primary color signal extraction circuit (41). circuit(
42) and (c) the input terminal is connected to the output terminal of the first luminance signal generation circuit (42), and determines whether the luminance signal Y exceeds a set value and outputs the luminance signal Y. Brightness comparison signal Y+ becomes high level only when exceeding the set value
(d) The input terminal is connected to the output terminal of the first three primary color signal extraction circuit (41), and the first three primary color signal extraction circuit (41) is a first three primary color signal addition circuit (44) for creating a three primary color sum signal X by adding together the three primary color signals R, G, and B given from (41); (e) a first three primary color signal extraction circuit (41); The input terminal is connected to the output terminal of the first three primary color signal adding circuit (41) and the output terminal of the first three primary color signal addition circuit (44), and the three primary color signals are generated by dividing the three primary color signals R, G, B by the three primary color sum signal R,
a first division circuit (45) for calculating the relative chromaticity XR, XG, and XB of G and B and outputting the maximum one as a relative chromaticity signal X*; and (f) a first division circuit. Circuit (45)
The input terminal is connected to the output terminal of , and it is determined whether the relative chromaticity signal (g) an output end of the first comparison circuit (43) and an output end of the second comparison circuit (46); a first signal combination circuit (47) whose input end is connected to the signal combination circuit (47), which combines the luminance comparison signal Y+ and the relative chromaticity comparison signal X+ and outputs it as a combination signal Z; 1 signal combination circuit (47
A first counting circuit ( ) whose input terminal is connected to the output terminal of the first counting circuit ( 48) and (i) the input terminal is connected to the output terminal of the first counting circuit (48), and when the counting result of the first counting circuit (48) exceeds a predetermined value, the object to be inspected (j) a first foreign matter detection signal generation circuit (49) for generating a first foreign matter detection signal V1 indicating that foreign matter is attached to the surface of the article; Signal P2
(k) The input terminal is connected to the output terminal of the second three primary color signal extraction circuit (141) for extracting the three primary color signals R, G, and B from the second primary color signal extraction circuit (141). , the three primary color signals R and G given from the second three primary color signal extraction circuit (141)
, a second luminance signal generation circuit (142) for creating a luminance signal Y from , B; A third comparator circuit for determining whether or not the luminance signal Y exceeds the set value and outputting the luminance comparison signal Y+ which becomes a high level state only when the luminance signal Y exceeds the set value.
143) and (m) The input terminal is connected to the output terminal of the second three primary color signal extraction circuit (141), and the three primary color signals R and G given from the second three primary color signal extraction circuit (141) are connected.
, B to each other to create the three primary color sum signal X; and (n) the output terminal of the second three primary color signal extraction circuit (141) and the second three primary color signal. The input terminal is connected to the output terminal of the adding circuit (144), and the three primary color signals R, G,
Calculates the relative chromaticity XR, XG, XB of the three primary color signals R, G, B by dividing B by the three primary color sum signal The input terminal is connected to the output terminal of the calculation circuit (145) and (o) the second division circuit (145), and it is determined whether or not the relative chromaticity signal X* exceeds the set value. a fourth comparison circuit (146) for outputting a relative chromaticity comparison signal X+ which becomes a high level state only when the relative chromaticity signal X* exceeds a set value; and (p) a third comparison circuit. (143) output end and the fourth
The input terminal is connected to the output terminal of the comparison circuit (146), and a second signal combination is produced by combining the luminance comparison signal Y+ and the relative chromaticity comparison signal X+ and outputting the resultant combination signal Z. The input terminals are connected to the output terminals of the circuit (147) and (q) the second signal combination circuit (147), and by counting the high level state included in the combination signal Z, the inspected article is detected. a second counting circuit for counting foreign matter mixed in or attached to the
148) and (r) the input terminal is connected to the output terminal of the second counting circuit (148), and when the counting result of the second counting circuit (148) exceeds a predetermined value, the object to be inspected is a second foreign matter detection signal generation circuit (149) for generating a second foreign matter detection signal V2 indicating that a foreign matter is attached to the back surface of the article; (t) an infrared irradiator (32A) which is arranged at a distance and is used to irradiate near-infrared rays from the front side or the back side of the inspected article; a sensor (32) for receiving the near-infrared rays that has passed through the inspected article and outputting the result of the light reception as a transmitted light signal P3; (u) an input end for the output end of the sensor (32); is connected, it is determined whether or not the transmitted light signal P3 is less than the set value, and only when the transmitted light signal P3 is less than the set value, it becomes a high level state to prevent foreign matter from entering the inspected item. Third foreign object detection signal V3 indicating adhesion
A third foreign object detection signal generation circuit (241
) An article inspection device comprising: 6. The luminance signal Y is expressed as αR+βG+γB using three coefficients α, β, and γ whose sum is 1 and has a value of 0 or more and 1 or less and three primary color signals R, G, and B. 6. The article inspection device according to claim 5, characterized in that: Claim 7: The first signal combination circuit (47) comprises (a)
a first AND circuit (47A) for creating an AND signal Y+ X+ of the luminance comparison signal Y+ and the relative chromaticity comparison signal X+; (b) the luminance comparison signal Y+ and the relative chromaticity comparison signal X+;
(c) the output terminal of the first AND circuit (47A) and the first OR circuit (47B) for outputting the logical sum signal Y+ +X+;
The output terminal of the OR circuit (47B) and the first comparison circuit (47B)
The first to fourth switching contacts are connected to the output terminal of 3) and the output terminal of the second comparator circuit (46), respectively, and the common contact as the output terminal is connected to the output terminal of the first counting circuit (48). It is connected to the input terminal, and is used to select any one of the logical product signal Y+ X+, the logical sum signal Y+ +X+, the luminance comparison signal Y+, and the relative chromaticity comparison signal The first selector switch (47
C), and the second signal combination circuit (147) receives (d) the luminance comparison signal Y+ and the relative chromaticity comparison signal X+.
(e) a second AND circuit (147A) for creating an AND signal Y+
(f) the output terminal of the second AND circuit (147A) and the second OR circuit (147B) for outputting the logical sum signal Y+ +X+;
The output terminal of the OR circuit (147B) and the third comparison circuit (147B)
Fifth to eighth switching contacts are connected to the output terminal of the fourth comparator circuit (146) and the output terminal of the fourth comparator circuit (146), respectively, and a common contact as an output terminal is connected to the output terminal of the second counting circuit (146).
48) is connected to the input terminal of
X+ and OR signal Y+ +X+ and luminance comparison signal Y+
and a second selector switch (147C) for selecting any one of the and the relative chromaticity comparison signal X+ and outputting it as the combination signal Z. The article inspection device according to claim 6. 8. Inspecting whether or not foreign matter is mixed in or attached to the inspected article by processing an image signal obtained by imaging the inspected article being conveyed by the article conveying section by the article imaging section. In an article inspection device consisting of (a
) A first signal for extracting and outputting the three primary color signals R, G, and B from the image signal P1 obtained from the surface of the object to be inspected.
The input terminal is connected to the output terminal of the three primary color signal extraction circuit (341) and (b) the first three primary color signal extraction circuit (341). Three primary color signals R, G
, B to each other to create the three primary color sum signal X; and (c) the output terminal of the first three primary color signal extraction circuit (341) and the first three primary color signals. The input end is connected to the output end of the adder circuit (342), and the three primary color signals R and G given from the first three primary color signal extraction circuit (341) are connected to the output end of the adder circuit (342).
, B are added to the first three primary color signal addition circuit (3
42) A first division circuit (3) for calculating and outputting two selected from the three primary color relative chromaticity signals XR, XG, and
44A1, 344B1, 344C1) and (d) first division circuit (344A1, 344B1, 344C1)
The input terminal is connected to the output terminal of the circuit, and the two selected from the three primary color relative chromaticity signals XR, XG, and A first relative chromaticity sum signal calculation circuit (343; 344A2, 344B2, 344C2;
345A, 345B, 345C; 346), and (e) first relative chromaticity sum signal calculation circuit (343; 34
4A2, 344B2, 344C2; 345A, 345B
, 345C; 346), and it is determined whether or not the relative chromaticity sum signal X** exceeds the set value, and the relative chromaticity sum signal X** is set to the set value. a first comparison circuit (347) for outputting a relative chromaticity sum comparison signal Z that becomes a high level state only when the
The input terminal is connected to the output terminal of the first comparator circuit (347), and by counting the high level state included in the relative chromaticity sum comparison signal Z, foreign matter attached to the surface of the inspected article is detected. The first counting circuit (3
48) and (g) the input terminal is connected to the output terminal of the first counting circuit (348), and the first counting circuit (348)
a first foreign matter detection signal generation circuit (349) for generating a first foreign matter detection signal V1 indicating that a foreign matter is attached to the surface of the inspected article when the counting result exceeds a predetermined value;
and (h) a second three primary color signal extraction circuit (441) for extracting and outputting the three primary color signals R, G, B from the image signal P2 obtained from the back side of the inspected article; (i) a second The input terminal is connected to the output terminal of the three primary color signal extraction circuit (441), and the three primary color signals R and G given from the second three primary color signal extraction circuit (441) are connected to the output terminal of the three primary color signal extraction circuit (441).
, B to each other to create the three primary color sum signal X; and (j) the output terminal of the second three primary color signal extraction circuit (441) and the second three primary color signal. The input terminal is connected to the output terminal of the adder circuit (442), and the three primary color signals R and G given from the second three primary color signal extraction circuit (441) are connected to the output terminal of the addition circuit (442).
, B to the second three primary color signal addition circuit (4
42) A second division circuit (42) for calculating and outputting two selected from the three primary color relative chromaticity signals XR, XG, and XB by dividing by the three primary color sum signal X given from
44A1, 444B1, 444C1) and (k) second division circuit (444A1, 444B1, 444C1)
The input terminal is connected to the output terminal of the circuit, and the two selected from the three primary color relative chromaticity signals XR, A second relative chromaticity sum signal calculation circuit (443; 444A2, 444B2, 444C2;
445A, 445B, 445C; 446), and (l) second relative chromaticity sum signal calculation circuit (443; 44
4A2, 444B2, 444C2; 445A, 445B
, 445C; 446), and it is determined whether or not the relative chromaticity sum signal X** exceeds the set value, and the relative chromaticity sum signal X** is set to the set value. a second comparator circuit (447) for outputting a relative chromaticity sum comparison signal Z that becomes a high level state only when the
The input terminal is connected to the output terminal of the second comparator circuit (447), and by counting the high level state included in the relative chromaticity sum comparison signal Z, foreign matter attached to the back surface of the inspected article is detected. A second counting circuit (4
48) and (n) the input terminal is connected to the output terminal of the second counting circuit (448), and the second counting circuit (448)
a second foreign matter detection signal generation circuit (449) for generating a second foreign matter detection signal V2 indicating that foreign matter is attached to the back surface of the inspected article when the counting result exceeds a predetermined value;
and (o) an infrared irradiator (3
2A) and (p) A sensor which is arranged at a distance on the back side or front side of the inspected article and receives the near infrared rays that have passed through the inspected article and outputs the result of the light reception as a transmitted light signal P3. (32) and (q) The input end is connected to the output end of the sensor (32), and it is determined whether the transmitted light signal P3 is less than the set value, and the transmitted light signal P3 is set to the set value. The third foreign object detection signal V3 becomes a high level state only when the value of
A third foreign object detection signal generation circuit (241
) An article inspection device comprising: 9. Inspecting whether or not foreign matter is mixed in or attached to the inspected article by processing an image signal obtained by imaging the inspected article being conveyed by the article conveying section by the article imaging section. In an article inspection device consisting of (a
) A first signal for extracting and outputting the three primary color signals R, G, and B from the image signal P1 obtained from the surface of the object to be inspected.
The input terminal is connected to the output terminal of the three primary color signal extraction circuit (341) and (b) the first three primary color signal extraction circuit (341). Three primary color signals R, G
, B to each other to create the three primary color sum signal X; and (c) the output terminal of the first three primary color signal extraction circuit (341) and the first three primary color signals. The input end is connected to the output end of the adder circuit (342), and the three primary color signals R and G given from the first three primary color signal extraction circuit (341) are connected to the output end of the adder circuit (342).
, B to the first three primary color signal addition circuits (3
42) First division to calculate one selected from the three primary color relative chromaticity signals XR, XG, and XB by dividing by the three primary color sum signal X given from , and output it as the relative chromaticity signal X* Circuit (344A1, 344B1, 34
4C1; 344A2, 344B2, 344C2; 346
) and (d) the first division circuit (344A1, 344
B1,344C1; 344A2,344B2,344C
2; 346), and the input terminal is connected to the output terminal of the first division circuit (344A1, 344B1, 344
C1; 344A2, 344B2, 344C2; 346)
Determines whether the relative chromaticity signal X* given from the above exceeds the set value, and outputs a relative chromaticity comparison signal that becomes high level only when the relative chromaticity signal X* exceeds the set value. (e) The input terminal is connected to the output terminal of the first comparison circuit (347) for detecting the high level state included in the relative chromaticity comparison signal. A first counting circuit (34
8) and (f) the input terminal is connected to the output terminal of the first counting circuit (348), and the first counting circuit (348)
a first foreign matter detection signal generation circuit (349) for generating a first foreign matter detection signal V1 indicating that a foreign matter is attached to the surface of the inspected article when the counting result exceeds a predetermined value;
and (g) a second three primary color signal extraction circuit (441) for extracting and outputting the three primary color signals R, G, B from the image signal P2 obtained from the back side of the object to be inspected, and (h) a second primary color signal extraction circuit (441). The input terminal is connected to the output terminal of the three primary color signal extraction circuit (441), and the three primary color signals R and G given from the second three primary color signal extraction circuit (441) are connected to the output terminal of the three primary color signal extraction circuit (441).
, B to each other to create the three primary color sum signal X; (i) the output terminal of the second three primary color signal extraction circuit (441) and the second three primary color signal; The input terminal is connected to the output terminal of the adder circuit (442), and the three primary color signals R and G given from the second three primary color signal extraction circuit (441) are connected to the output terminal of the addition circuit (442).
, B to the second three primary color signal addition circuit (4
42) Second division to calculate one selected from the three primary color relative chromaticity signals XR, XG, and XB by dividing by the three primary color sum signal X given from , and output it as the relative chromaticity signal X* Circuit (444A1, 444B1, 44
4C1; 444A2, 444B2, 444C2; 446
) and (j) second division circuit (444A1, 444
B1,444C1; 444A2,444B2,444C
The input terminal is connected to the output terminal of the second division circuit (444A1, 444B1, 444).
C1; 444A2, 444B2, 444C2; 446)
Determines whether the relative chromaticity signal X* given from the above exceeds the set value, and outputs a relative chromaticity comparison signal that becomes high level only when the relative chromaticity signal X* exceeds the set value. (k) The input terminal is connected to the output terminal of the second comparison circuit (447) for detecting the high level state included in the relative chromaticity comparison signal. a second counting circuit (448) for counting the number of foreign substances attached to the back surface of the inspected article;
(l) The input terminal is connected to the output terminal of the second counting circuit (448), and the input terminal is connected to the output terminal of the second counting circuit (448).
8) A second foreign matter detection signal generation circuit (449) for generating a second foreign matter detection signal V2 indicating that a foreign matter is mixed in or attached to the inspected article when the counting result exceeds a predetermined value. and (m) an infrared irradiator (32A) which is arranged at a distance from the front side or the back side of the article to be inspected and irradiates the article with near infrared rays from the front side or the back side; ) It is placed at a distance on the back side or front side of the item to be inspected, receives the near infrared rays that have passed through the item to be inspected, and converts the result of the light reception into a transmitted light signal P.
(o) The input end is connected to the output end of the sensor (32) to determine whether the transmitted light signal P3 is less than the set value. A third foreign object detection signal V3 which becomes a high level state only when the transmitted light signal P3 is less than a set value and indicates that a foreign object is mixed in or attached to the inspected article.
A third foreign object detection signal generation circuit (241
) An article inspection device comprising: 10. Inspecting whether or not foreign matter is mixed in or attached to the inspected article by processing an image signal obtained by imaging the inspected article being conveyed by the article conveying section by the article imaging section. In the article inspection equipment consisting of (
a) a first three primary color signal extraction circuit (341) for extracting and outputting three primary color signals R, G, and B from an image signal P1 obtained from the surface of the object to be inspected; (b) a first three primary color signal extraction circuit The input end is connected to the output end of the circuit (341), and the three primary color signals R and G given from the first three primary color signal extraction circuit (341) are connected to the output end of the circuit (341).
, B to each other to create the three primary color sum signal X; and (c) the output terminal of the first three primary color signal extraction circuit (341) and the first three primary color signals. The input end is connected to the output end of the adder circuit (342), and the three primary color signals R and G given from the first three primary color signal extraction circuit (341) are connected to the output end of the adder circuit (342).
, B by the three primary color sum signal X given from the first three primary color signal addition circuit (342) to calculate and output the three primary color relative chromaticity signals XR, XG, XB. 344A1, 344B1, 344C1
) and (d) first division circuit (344A1, 344B1, 3
The input terminal is connected to the output terminal of the first division circuit (344A1, 344B1, 344C1).
1) Three primary color relative chromaticity signals XR, XG, given from
A first multiplication circuit (344A2, 344B
2,344C2) and (e) the input terminal is connected to the output terminal of the first three primary color signal extraction circuit (341), and the three primary color signal R given from the first three primary color signal extraction circuit (341). , G, B are compared with each other, selection signals gR, gG, which become 0 corresponding to the largest one,
(f) a first selection signal generation circuit (343) for calculating and outputting gB; and (f) a first multiplication circuit (344A2, 344B2, 3
44C2) and the first selection signal generation circuit (
The input end is connected to the output end of 343),
The selection signals gR, gG, gB given from the first selection signal generation circuit (343) and the first multiplication circuit (344A
A first relative chromaticity sum for outputting a relative chromaticity sum signal X** by adding together the products of the three primary color relative chromaticity signals αXR, βXG, γXB with coefficients given from 2,344B2, 344C2). Signal calculation circuit (345A, 345B,
345C; 346) and (g) the input terminals are connected to the output terminals of the first relative chromaticity sum signal calculation circuit (345A, 345B, 345C; 346), and the relative chromaticity sum signal X** A first comparison for outputting a relative chromaticity sum comparison signal Z that becomes a high level state only when the relative chromaticity sum signal X** exceeds the set value by determining whether or not exceeds the set value. The input terminals are connected to the output terminals of the circuit (347) and (h) the first comparator circuit (347), and by counting the high level state included in the relative chromaticity sum comparison signal Z, a first counting circuit (348) for counting the number of foreign substances mixed in or attached to the inspected article; (i) an input terminal is connected to an output terminal of the first counting circuit (348); , first counting circuit (348)
a first foreign matter detection signal generation circuit (349) for generating a first foreign matter detection signal V1 indicating that a foreign matter is attached to the surface of the inspected article when the counting result exceeds a predetermined value;
and (j) a second three primary color signal extraction circuit (441) for extracting and outputting the three primary color signals R, G, B from the image signal P2 obtained from the back side of the article to be inspected; (k) a second The input terminal is connected to the output terminal of the three primary color signal extraction circuit (441), and the three primary color signals R and G given from the second three primary color signal extraction circuit (441) are connected to the output terminal of the three primary color signal extraction circuit (441).
, B to each other to create the three primary color sum signal X; and (l) the output terminal of the second three primary color signal extraction circuit (441) and the second three primary color signal. The input terminal is connected to the output terminal of the adder circuit (442), and the three primary color signals R and G given from the second three primary color signal extraction circuit (441) are connected to the output terminal of the addition circuit (442).
, B by the three primary color sum signal X given from the second three primary color signal addition circuit (442) to calculate and output the three primary color relative chromaticity signals XR, XG, XB. 444A1, 444B1, 444C1
) and (m) second division circuit (444A1, 444B1, 4
The input terminal is connected to the output terminal of the second division circuit (444A1, 444B1, 444C
1) Three primary color relative chromaticity signals XR, XG, given from
A second multiplication circuit (444A2, 444B
2,444C2) and (n) the input terminal is connected to the output terminal of the second three primary color signal extraction circuit (441), and the three primary color signal R given from the second three primary color signal extraction circuit (441). , G, B are compared with each other, selection signals gR, gG, which become 0 corresponding to the largest one,
(o) a second selection signal generation circuit (443) for calculating and outputting gB; and (o) a second multiplication circuit (444A2, 444B2, 4
44C2) and the second selection signal generation circuit (
The input end is connected to the output end of 443),
The selection signals gR, gG, gB given from the second selection signal generation circuit (443) and the second multiplication circuit (444A
A second relative chromaticity sum for outputting a relative chromaticity sum signal X** by adding together the products of the three primary color relative chromaticity signals αXR, βXG, γXB with coefficients given from 2,444B2,444C2). Signal calculation circuit (445A, 445B,
445C; 446) and (p) the input terminals are connected to the output terminals of the second relative chromaticity sum signal calculation circuit (445A, 445B, 445C; 446), and the relative chromaticity sum signal X** A second comparison for outputting a relative chromaticity sum comparison signal Z that becomes a high level state only when the relative chromaticity sum signal X** exceeds the set value by determining whether or not exceeds the set value. The input terminals are connected to the output terminals of the circuit (447) and (q) the second comparator circuit (447), and by counting the high level state included in the relative chromaticity sum comparison signal Z, A second counting circuit (448) for counting the number of foreign substances mixed in or attached to the inspected article; and (r) an input terminal is connected to an output terminal of the second counting circuit (448). , second counting circuit (448)
When the count result exceeds a predetermined value, a second foreign matter detection signal V indicating that foreign matter is mixed in or attached to the inspected article
A second foreign object detection signal generation circuit (4
49) and (s) an infrared ray irradiator (32A) which is arranged at a distance from the front side or back side of the inspected article and irradiates near infrared rays to the inspected article from the front side or the back side; (t) A sensor (32) which is arranged at a distance on the back side or front side of the inspected article and receives the near infrared rays transmitted through the inspected article and outputs the light reception result as a transmitted light signal P3; (u) The input end is connected to the output end of the sensor (32), and it is determined whether the transmitted light signal P3 is less than the set value, and when the transmitted light signal P3 is less than the set value. The third foreign object detection signal V3 is at a high level only when the object is inspected, indicating that foreign objects are mixed in or attached to the inspected article.
A third foreign object detection signal generation circuit (241
) An article inspection device comprising: 11. Inspecting whether or not foreign matter is attached to the inspected article by processing an image signal obtained by capturing an image of the inspected article being conveyed by the article conveying section using an article imaging section. In the article inspection device, (a) an image signal P1 obtained from the front or back surface of the article to be inspected;
The input terminal is connected to the output end of the three primary color signal extraction circuit (41; 141) for extracting the three primary color signals R, G, and B from P2, and (b) the three primary color signal extraction circuit (41; 141), Three primary color signal extraction circuit (41; 141)
a luminance signal creation circuit (42; 142) for creating a luminance signal Y from the three primary color signals R, G, and B given from;
(c) The input end is connected to the output end of the brightness signal generation circuit (42; 142), and it is determined whether the brightness signal Y exceeds the set value by determining whether the brightness signal Y exceeds the set value. (d) an input terminal is connected to the output terminal of the comparison circuit (43; 143); A counting circuit (48; 14) for counting the foreign matter attached to the surface of the inspected article by counting the high level state included in the brightness comparison signal Y+.
8) and (e) the input terminal is connected to the output terminal of the counting circuit (48; 148), and the counting circuit (48;
8) A first foreign matter detection signal V indicating that foreign matter is attached to the surface of the inspected article when the counting result exceeds a predetermined value.
(f) A first foreign object detection signal generation circuit (49; 149) for generating 1, V2; (g) an infrared irradiator (32A) for irradiating near-infrared rays from the side or back side; (h) The input end is connected to the output end of the sensor (32), and the transmitted light signal P3 is set to a set value. A second foreign object detection signal V3 which becomes a high level state only when the transmitted light signal P3 is less than the set value and indicates that a foreign object is mixed in or attached to the inspected article.
A second foreign object detection signal generation circuit (241
) An article inspection device comprising: 12. Luminance signal Y is expressed as αR + βG + γB using three coefficients α, β, γ whose sum is 1 and has a value of 0 or more and 1 or less and three primary color signals R, G, B. The article inspection device according to claim 11, characterized in that: 13. Inspecting whether or not foreign matter is mixed in or attached to the inspected article by processing an image signal obtained by imaging the inspected article being conveyed by the article conveying section by the article imaging section. In the article inspection equipment consisting of (
a) A three primary color signal extraction circuit (41; 141) for extracting the three primary color signals R, G, B from the image signals P1, P2 obtained from the front or back surface of the article to be inspected; (b)
The input terminal is connected to the output terminal of the three primary color signal extraction circuit (41; 141), and the three primary color signal extraction circuit (41;
; (c) a three primary color signal extraction circuit (41; 141) for adding the three primary color signals R, G, and B given from the three primary color signals R, G, and B to each other to create a three primary color sum signal X; ) and the output end of the three primary color signal addition circuit (44; 144), and by dividing the three primary color signals R, G, B by the three primary color sum signal X, the three primary color signals R, A division circuit (45; 145) for calculating the relative chromaticity XR, XG, XB of G and B and outputting the maximum one as a relative chromaticity signal X*; (d) a division circuit (45;
The input terminal is connected to the output terminal of 145), and it is determined whether or not the relative chromaticity signal The input terminal is connected to the output terminal of the comparison circuit (46; 146) for outputting the relative chromaticity comparison signal A counting circuit (48;
148) and (f) the input end is connected to the output end of the counting circuit (48; 148), and the counting circuit (48;
a first foreign matter detection signal generation circuit ( 49; 149), and (g) an infrared irradiator (32A ) and (h) are spaced apart from each other on the back side or front side of the item to be inspected,
a sensor (32) for receiving near-infrared rays transmitted through the inspected article and outputting the reception result as a transmitted light signal P3; (i) an input end is connected to the output end of the sensor (32); , determines whether or not the transmitted light signal P3 is less than the set value, and becomes a high level state only when the transmitted light signal P3 is less than the set value, indicating that foreign matter has entered or adhered to the inspected article. A second foreign object detection signal V3 indicating
A second foreign object detection signal generation circuit (241
) An article inspection device comprising: 14. Inspecting whether or not foreign matter is mixed into or attached to the inspected article by processing an image signal obtained by imaging the inspected article being conveyed by the article conveying section by the article imaging section. In the article inspection equipment consisting of (
a) A three primary color signal extraction circuit (41; 141) for extracting the three primary color signals R, G, B from the image signals P1, P2 obtained from the front or back surface of the article to be inspected; (b)
The input terminal is connected to the output terminal of the three primary color signal extraction circuit (41; 141), and the three primary color signal extraction circuit (41;
A luminance signal generation circuit (42;1) for generating a luminance signal Y from the three primary color signals R, G, B given from
42) and (c) luminance signal generation circuit (42; 142)
The input terminal is connected to the output terminal of the luminance signal Y
A brightness comparison signal Y that determines whether or not exceeds a set value and becomes a high level state only when the brightness signal Y exceeds the set value.
The first comparison circuit (43; 143) for outputting +
(d) The input terminal is connected to the output terminal of the three primary color signal extraction circuit (41; 141), and the three primary color signals R, G, B given from the three primary color signal extraction circuit (41; 141) are connected.
(e) the output end of the three primary color signal extraction circuit (41; 141) and the three primary color signal addition circuit (44; 144) The input terminal is connected to the output terminal of , and the relative chromaticity XR, XG, XB of the three primary color signals R, G, B is calculated by dividing the three primary color signals R, G, B by the three primary color sum signal X. and (f) a division circuit (45; 145) for outputting the maximum one as a relative chromaticity signal X*;
The input terminal is connected to the output terminal of 145), and it is determined whether or not the relative chromaticity signal (g) the output end of the first comparison circuit (43; 143) and the second comparison circuit ( 46
; 146), the input terminal is connected to the output terminal of the signal combination circuit (
47; 147) and (h) the input terminal is connected to the output terminal of the signal combination circuit (47; 147), and by counting the high level state included in the combination signal Z, the inspection object is detected. Counting circuit for counting foreign matter attached to the surface (48; 148)
(i) The input terminal is connected to the output terminal of the counting circuit (48; 148), and the counting circuit (48; 148)
A first foreign matter detection signal V1, which indicates that foreign matter is attached to the surface of the inspected article when the counting result exceeds a predetermined value;
A first foreign object detection signal generation circuit for generating V2 (
49; 149), and (j) an infrared irradiator (32A ), and (k) a sensor () which is arranged at a distance on the back or front side of the object to be inspected and which receives the near infrared rays that have passed through the object to be inspected and outputs the result of the light reception as a transmitted light signal P3. 32) and (l) The input end is connected to the output end of the sensor (32), and it is determined whether the transmitted light signal P3 is less than the set value and the transmitted light signal P3 reaches the set value. The second foreign matter detection signal V3 becomes a high level state only when the condition is not satisfied, and indicates that foreign matter is mixed in or attached to the inspected article.
A second foreign object detection signal generation circuit (241
) An article inspection device comprising: 15. The luminance signal Y is expressed as αR+βG+γB using three coefficients α, β, and γ whose sum is 1 and has a value of 0 or more and 1 or less and three primary color signals R, G, and B. 15. The article inspection device according to claim 14, characterized in that: 16. The signal combination circuit (47; 147) comprises (a
) AND circuit (
(b) Luminance comparison signal Y+ and relative chromaticity comparison signal X+
an OR circuit (47B; 147B) for outputting an OR signal Y+ +X+; (c) a first comparison between the output terminal of the AND circuit (47A; 147A) and the output terminal of the OR circuit (47B; 147B); The output terminal of the circuit (43; 143) and the second comparison circuit (46; 1
The first to fourth switching contacts are respectively connected to the output terminal of 46), and the common contact as the output terminal is connected to the input terminal of the counting circuit (48; 148), and the logical product signal Y+ and a changeover switch (47C; 147C) for selecting one of the logical sum signal Y+ +X+, the luminance comparison signal Y+, and the relative chromaticity comparison signal X+ and outputting it as the combination signal Z. The article inspection device according to claim 14 or 15, characterized in that: 17. Inspecting whether or not foreign matter is mixed in or attached to the inspected article by processing an image signal obtained by imaging the inspected article being conveyed by the article conveying section by the article imaging section. In the article inspection equipment consisting of (
a) Three primary color signal extraction circuits (341; 441) for extracting and outputting the three primary color signals R, G, and B from the image signals P1 and P2 obtained from the front or back surface of the inspected article.
) and (b) three primary color signal extraction circuits (341; 441
), whose input terminal is connected to the output terminal of the three primary color signal extraction circuit (341; 441), which adds the three primary color signals R, G, and B given from the three primary color signal extraction circuit (341; 441) to create the three primary color sum signal X. Signal addition circuit (342; 442)
(c) The input end is connected to the output end of the three primary color signal extraction circuit (341; 441) and the output end of the three primary color signal addition circuit (342; 442), and the three primary color signal extraction circuit (341; 441) A three primary color signal addition circuit (3
42; 442), the three primary color relative chromaticity signals XR, XG, XB are obtained by dividing by the three primary color sum signal X given from
A division circuit (
344A1, 344B1, 344C1; 444A1, 4
44B1, 444C1) and (d) division circuit (34
4A1,344B1,344C1;444A1,444
The input terminal is connected to the output terminal of the division circuit (344A1, 344B1, 344C1).
C1; 444A1, 444B1, 444C1) for outputting a relative chromaticity sum signal X** by adding two selected from the three primary color relative chromaticity signals XR, XG, XB given from Relative chromaticity sum signal calculation circuit (3
43;344A2,344B2,344C2,;345
A, 345B, 345C; 346; 443; 444A2
, 444B2, 444C2; 445A, 445B, 44
5C; 446) and (e) Relative chromaticity sum signal calculation circuit (343; 344A2)
,344B2,344C2,;345A,345B,3
45C; 346; 443; 444A2, 444B2, 4
The input terminals are connected to the output terminals of 44C2; 445A, 445B, 445C; 446), and it is determined whether the relative chromaticity sum signal A comparison circuit (
347; 447) and (f) the input terminal is connected to the output terminal of the comparison circuit (347; 447), and the high level state included in the relative chromaticity sum comparison signal Z is counted. (g) a counting circuit (348; 448) for counting the number of foreign substances attached to the surface of the inspection article; and (g) a counting circuit (348;
448) The input end is connected to the output end of
A first foreign object for generating first foreign object detection signals V1 and V2 indicating that a foreign object is attached to the surface of the object to be inspected when the counting result of the counting circuit (348; 448) exceeds a predetermined value. a detection signal generation circuit (349; 449);
(h) An infrared irradiator (32A
) and (i) a sensor ( which is arranged at a distance on the back side or front side of the inspected article and receives the near infrared rays transmitted through the inspected article and outputs the light reception result as a transmitted light signal P3); 32) and (j) The input end is connected to the output end of the sensor (32), and it is determined whether the transmitted light signal P3 is less than the set value and the transmitted light signal P3 reaches the set value. The second foreign matter detection signal V3 becomes a high level state only when the condition is not satisfied, and indicates that foreign matter is mixed in or attached to the inspected article.
A second foreign object detection signal generation circuit (241
) An article inspection device comprising: 18. Inspecting whether or not foreign matter is mixed in or attached to the inspected article by processing an image signal obtained by imaging the inspected article being conveyed by the article conveying section by the article imaging section. In the article inspection equipment consisting of (
a) Three primary color signal extraction circuits (341; 441) for extracting and outputting the three primary color signals R, G, and B from the image signals P1 and P2 obtained from the front or back surface of the inspected article.
) and (b) three primary color signal extraction circuits (341; 441
), whose input terminal is connected to the output terminal of the three primary color signal extraction circuit (341; 441), which adds the three primary color signals R, G, and B given from the three primary color signal extraction circuit (341; 441) to create the three primary color sum signal X. Signal addition circuit (342; 442)
(c) The input end is connected to the output end of the three primary color signal extraction circuit (341; 441) and the output end of the three primary color signal addition circuit (342; 442), and the three primary color signal extraction circuit (341; 441) A three primary color signal addition circuit (3
42; 442), the three primary color relative chromaticity signals XR, XG, XB are obtained by dividing by the three primary color sum signal X given from
A division circuit (344A1, 344B1, 3
44C1; 344A2, 344B2, 344C2; 44
4A1,444B1,444C1;444A2,444
B2,444C2) and (d) division circuit (344A
1,344B1,344C1; 344A2,344B2
, 344C2; 444A1, 444B1, 444C1;
The input end is connected to the output end of the divider circuit (344A1, 444C2).
344B1, 344C1; 344A2, 344B2, 3
44C2; 444A1, 444B1, 444C1; 44
4A2, 444B2, 444C2)) determines whether the relative chromaticity signal X* exceeds the set value and becomes a high level state only when the relative chromaticity signal X* exceeds the set value. a comparison circuit (347; 447) for outputting a degree comparison signal; and (e) a comparison circuit (347;
The input end is connected to the output end of 447),
a counting circuit (348; 448) for counting the number of foreign substances mixed in or attached to the inspected article by counting the high level state included in the relative chromaticity comparison signal;
f) The input terminal is connected to the output terminal of the counting circuit (348; 448), and the counting circuit (348; 448)
When the counting result exceeds a predetermined value, a first foreign matter detection signal V1 indicates that a foreign matter is attached to the surface of the inspected article.
, V2 (349; 449); or an infrared irradiator (32A) for irradiating near-infrared rays from the back side; and (h) an infrared ray irradiator (32A) that is placed at a distance on the back side or front side of the inspected article and receives near-infrared rays that have passed through the inspected article. (i) The input end is connected to the output end of the sensor (32), and the transmitted light signal P3 satisfies a set value. A second foreign object detection signal V3 which becomes a high level state only when the transmitted light signal P3 is less than a set value and indicates that foreign objects have entered or adhered to the inspected article.
A second foreign object detection signal generation circuit (241
) An article inspection device comprising: 19. Inspecting whether or not foreign matter is mixed in or attached to the inspected article by processing an image signal obtained by imaging the inspected article being conveyed by the article conveying section by the article imaging section. In the article inspection equipment consisting of (
a) Three primary color signal extraction circuits (341; 441) for extracting and outputting the three primary color signals R, G, and B from the image signals P1 and P2 obtained from the front or back surface of the inspected article.
) and (b) three primary color signal extraction circuits (341; 441
), whose input terminal is connected to the output terminal of the three primary color signal extraction circuit (341; 441), which adds the three primary color signals R, G, and B given from the three primary color signal extraction circuit (341; 441) to create the three primary color sum signal X. Signal addition circuit (342; 442)
(c) The input end is connected to the output end of the three primary color signal extraction circuit (341; 441) and the output end of the three primary color signal addition circuit (342; 442), and the three primary color signal extraction circuit (341; 441) The three primary color signals R, G, B given from the three primary color signal addition circuit (342; 442)
A division circuit (344A1, 344B1, 344C) for calculating and outputting three primary color relative chromaticity signals XR, XG, XB by dividing by a three primary color sum signal
1; 444A1, 444B1, 444C1) and (d) division circuit (344A1, 344B1, 344C
The input terminal is connected to the output terminal of the divider circuit (344A1, 444B1, 444C1).
1,344B1,344C1;444A1,444B1
, 444C1)
Multiplying R,
Multiplication circuit (344A2, 344A2, 3
44B2, 344C2; 444A2, 444B2, 44
4C2) and (e) three primary color signal extraction circuit (341;
The input end is connected to the output end of 441),
By comparing the three primary color signals R, G, and B given from the three primary color signal extraction circuits (341; 441), selection signals gR, gG, and gB that become 0 corresponding to the largest one are generated.
A selection signal generation circuit (343) for calculating and outputting
;443) and (f) Multiplication circuit (344A2, 344B2, 344C
The input terminal is connected to the output terminal of the selection signal generation circuit (343; 443) and the output terminal of the selection signal generation circuit (2; 444A2, 444B2, 444C2).
343; 443) Selection signals gR, gG given from
, gB and the multiplication circuit (344A2, 344B2, 344
C2; 444A2, 444B2, 444C2) three primary color relative chromaticity signals αXR, βXG, γX with coefficients given from
A relative chromaticity sum signal calculation circuit (345A, 34
5B, 345C; 346; 445A, 445B, 445
C; 446) and (g) Relative chromaticity sum signal calculation circuit (345A, 345B
, 345C; 346; 445A, 445B, 445C;
The input end is connected to the output end of 446),
A relative chromaticity sum comparison signal Z that determines whether the relative chromaticity sum signal X** exceeds a set value and becomes a high level state only when the relative chromaticity sum signal X** exceeds the set value is determined. The input terminal is connected to the output terminal of the comparison circuit (347; 447) for output and (h) comparison circuit (347; 447), and the high level included in the relative chromaticity sum comparison signal Z A counting circuit (348; 4) for counting the number of foreign substances mixed in or attached to the inspected article by counting the state.
48) and (i) The input terminal is connected to the output terminal of the counting circuit (348; 448), and the counting circuit (348; 448)
) when the count result exceeds a predetermined value, a first foreign matter detection signal V indicating that foreign matter is attached to the surface of the object to be inspected.
1, a first foreign object detection signal generation circuit (349; 449) for generating V2; (k) an infrared irradiator (32A) for irradiating near-infrared rays from the side or back side; (k) spaced apart from the back side or front side of the article to be inspected;
a sensor (32) for receiving near-infrared rays that has passed through the inspected article and outputting the result of the light reception as a transmitted light signal P3; (l) an input end is connected to the output end of the sensor (32); , determines whether or not the transmitted light signal P3 is less than the set value, and becomes a high level state only when the transmitted light signal P3 is less than the set value, indicating that foreign matter has entered or adhered to the inspected article. A second foreign object detection signal V3 indicating
A second foreign object detection signal generation circuit (241
) An article inspection device comprising: