JPH01112143A - Abnormality deciding device for long-sized body - Google Patents

Abstract

PURPOSE:To specify an abnormal position of the long-sized body by putting pieces of image information on the long-sized body detected by >=2 image pickup means together into images in one-screen units and inputting the images to an abnormality detecting means. CONSTITUTION:The abnormality deciding device 20 for the long-sized body composes each one-screen image of pieces of image information detected by image pickup means 4a-4c arranged at the periphery of the long-sized body 1 which is conveyed lengthwise by a multiplexer 8 and an image signal output circuit 9. The same image displayed on a monitor 10 is inputted to a synchronous separating circuit 13 and separated into a vertical synchronizing signal and a horizontal synchronizing signal. Then only primary part signals of long- sized body images 1a-1c are inputted to a differentiating circuit 15, which differentiates the arrival signals. When there is a discontinuous part such as a flaw in a primary part signal, the output of the differentiating circuit 15 increases corresponding to the part. This output is inputted to a deciding circuit 17 through a sensitivity adjusting circuit 16 to detect the abnormal part of the long-sized body 1.

Description

Detailed Description of the Invention [Field of Industrial Application] The present invention relates to an abnormality determination device for long objects that detects local abnormalities such as scratches on long objects. When managing the production of products, when detecting defects,
After detecting a defect, it can be used to distinguish the defective part from other products and eliminate it.

[Prior Art] Conventional long object abnormality determination devices for detecting local abnormalities such as scratches on long objects use an optical fiber that supplies light from four directions around the long object. The guided light sources are arranged at two locations in the transport direction of the length direction, and the light source illuminates the periphery of the long object, and the irradiated long object is fixed to a specific frame using another optical fiber. There are commercially available devices that guide the ends of optical fibers arranged perpendicularly to the ends of the optical fibers and image them with a single imaging device.

[Problems to be Solved by the Invention] However, the long object abnormality discriminating device that detects partial abnormalities such as scratches on the long object is capable of detecting the optical fiber end of the frame from the long object being transported. Since the image is optically guided to the end of the optical fiber, it is necessary to accurately set the distance from the long object to the optical fiber entrance end. It is necessary to determine the positioning hole and focus position according to the shape of the long object.

Since abnormalities such as scratches are detected by the amount of light at the end of the optical fiber, it is necessary to make the surface illumination of the long object to be transported uniform, which requires advanced technology. there were.

In addition, the image that guides the long object to be transported to the end of the optical fiber needs to be accurately formed at the end of the optical fiber, and to improve the accuracy, it is necessary to improve the precision of the optical fiber itself. However, there was a problem that the equipment was expensive.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide an inexpensive abnormality determination device for a long object that is less affected by the shape of the long object and its surface illuminance.

[Means for solving the problem] The abnormality determination device for a long object according to the present invention includes two or more imaging means disposed around the long object that is continuously transported in the length direction. and abnormality detection means for detecting a partial abnormality of the long object from the output signal of the image synthesis means for vertically synthesizing the image information detected by the imaging means to form two or more images in one screen unit. The apparatus is comprised of abnormality detection means for identifying an abnormality in the elongated object where an abnormality has been detected based on the output.

[Function] In the present invention, two or more IR image flattening means are arranged around a long object that is continuously transported in the length direction, and image information detected by the imaging means is used by an image synthesizing means. The images are combined in the vertical direction to form an image in units of one screen. Then, the image in units of one screen is input to the abnormality detection means as an image input in units of one screen, where a partial abnormality of the long object is detected, and the abnormality point detection means detects a partial abnormality of the long object detected. This is to identify abnormal locations.

[Example] Examples of the present invention will now be described.

FIG. 1 is a block diagram showing the overall configuration of an abnormality detection device constituting an abnormality determination device for a long object according to an embodiment of the present invention. FIG. 2 is an example of a production system using the abnormality determination device for long objects according to the embodiment of the present invention.

In the figure, a long object 1 that is continuously transported in the length direction is a tube or bar such as a hose, weather strip, or molding. The light projection head 2 is an optical fiber 3
The optical fiber 3 holds the end 3a of the long object 1, and irradiates the light guided by the optical fiber 3 evenly onto the outer peripheral surface of the long object 1.

Imaging means 4a.

4b and 4C are CCD image sensors and MOs used in video cameras, industrial television cameras, industrial video equipment, etc.
There are three imaging means such as an S image sensor, an image orthicon, and a vidicon, and a vertical/horizontal synchronization signal generation circuit 6.
is driven by.

The outputs of the three imaging means 4a, 4b, 4c driven by the vertical/horizontal synchronizing signal generation circuit 6 are output as image information of a predetermined number of scanning lines by image signal circuits 5a, 5b, 5c, respectively. At this time, three imaging means 4a, 4b, 4c
The output of the imaging means 4a is one-third from the top of one screen.
area, the imaging means 4b is from the upper third to the third of one screen unit.
2/2 area, @image means 4b is the upper two-thirds of one screen unit
In such a way that the image of the long object 1 is located in an area of 3/3 from
Three imaging means 4a, 4b, and 4c are installed.

The multiplexer 8 inputs the outputs of the imaging means 4a, 4b, and 4c, counts the number of horizontal synchronization signals starting from the vertical synchronization signal from the vertical/horizontal synchronization signal generation circuit 6, and outputs the image of the long object 1 to the imaging means. 4a is an area from the top one-third of one screen unit, and imaging means 4b is an area from the top one-third to two-thirds of one screen unit.
area, the imaging means 4C is from the upper two-thirds to the upper third of one screen unit.
The timing circuit 7 counts the horizontal synchronization signals to create the image information switching timing so that the image information is in the 3/3 area.
The outputs of the imaging means 4a, 4b, and 4c are switched. The image information output from these imaging means 4a, 4b, and 4c is outputted as image information for one screen by an image signal output circuit 9.

Therefore, as shown in the figure, the monitor 10 has an imaging means 4a for capturing the elongated object 1.

Long object images 1a, 1b, 1G obtained by lfi imaging in 4b and 4c
The imaging means 4a covers the top one-third area of one screen unit,
The image capturing means 4b takes an image located in the upper one-third to two-thirds of the screen, and the image capturing means 4C takes the image located in the upper two-thirds to three-thirds of the screen.

The same image as the image visualized on the monitor is input to the synchronization separation circuit 13. The synchronization pre-circuit 13 separates a vertical synchronization signal and a horizontal synchronization signal from the imaged signal of one screen, and the timing generation circuit 12 obtains a timing signal for controlling the opening and closing of the analog gate 14. That is, the timing generation circuit 12 extracts image information in a predetermined range starting from the start of the vertical synchronization signal and the horizontal synchronization signal. The predetermined range for extracting this image information is set and inputted in the timing setting circuit 11. This determines which range of one screen is to be extracted. Controlling the opening and closing of the analog gate 14 by the timing generation circuit 12 within a predetermined range to be extracted,
A long object image 1a captured by predetermined imaging means 4a, 4b, and 4c.

Only the essential signals of 1b and 1G are input to the differentiating circuit 15.

The differentiating circuit 15 differentiates the incoming signal.

At this time, if there is a discontinuous part such as a scratch in the main part signals of the long object images 1a, 1b, 1c, the discontinuous part is
5 will have a large output, and a monotonous flat signal will have a small output. The output of the differentiating circuit 15 is input to a determination circuit 17 via a sensitivity adjustment circuit 16. Judgment circuit 17
Then, the output of the differentiating circuit 15 at a predetermined signal level is compared with a predetermined threshold value, and when the output is equal to or higher than the predetermined threshold value, the output is designated as "HII or L11".

The abnormality detection device 20 for the elongated object 1 of the above embodiment configured in this manner is used as follows.

First, a long object 1 formed by an extruder 21 such as an extrusion molding machine
The abnormality detection device 20 for the elongated object 1 shown in FIG. 1 detects discontinuous portions such as scratches on the surface of the elongated object. The long object 1 that has passed through the abnormality detection device 20 is subjected to predetermined printing in a printing machine 22, passes through a marking device 23, and is sent to a take-up machine 2.
Transferred at 4. That is, the long object 1 formed by the extruder 21 is tensioned by the take-up machine 24 and sent out via the abnormality detection device 20, the printing machine 22, and the marking device 23. The long object 1 sent out by the take-up machine 24 is transferred to a water cooling tank 25.
The long object 1 is cooled, an anti-adhesive agent is applied by an anti-adhesive agent applicator 26 to prevent the long objects 1 from joining each other, and the long object 1 is cut into a predetermined length by a cutting machine 27. The long object 1 cut into a predetermined length is
If an abnormality such as a scratch on the surface is detected on the predetermined length of the cut long object 1, the sorter 28 transfers the long object 1 to be used as a product to the product container 29. The long articles 1 that are not found are sorted into a defective article container 30.

The timing at this time is as follows.

A long object 1 formed by an extruder 21 such as an extrusion molding machine is detected by an abnormality detection device 20 for the long object 1 shown in FIG. 1 to detect discontinuous parts such as scratches on the surface. Object image 1a, 1
When there is a discontinuous part such as a scratch in the main signal of b or 1c,
The output of the determination circuit 17 is set to "'H". Note that in a normal state with no discontinuous portion, the output of the determination circuit 17 is “L”.
It becomes u.

The output of the abnormality detection device 20 is input to a set terminal S of a flip-flop 31 with set priority.

Further, the long object 1 is tensioned by the take-up machine 24,
Since it is transferred at the transfer speed of the take-up machine 24, the transfer speed is detected by the rotary encoder 35, and the signal generated by the rotary encoder 35 is waveform-shaped by the pulse generator 36 or a pulse with a predetermined pulse width is generated. The output of the pulse generator 36 is inputted as a clock pulse to the shift register 40. That is, the shift register 40 shifts the stored information at the output of the pulse generator 36. The speed at which this shift register 40 is shifted is the same as the transfer speed of the take-up machine 24.

The output terminal Q of the flip-flop 31 is input to the shift register 40, and the abnormality detection device 20 for the long object 1 is inputted to the shift register 40.
When a discontinuous portion such as a scratch is detected on the surface, the output of the determination circuit 17 becomes "'tobi'", which is stored in the flip-flop 31.

At this time, the output terminal Q of the flip-flop 31 is 11
Hti, and the output of the flip-flop 31 is written to the shift 1 to register 40 by the output of the pulse generator 36. After writing the output of the flip-flop 31, the output of the pulse generator 36 is input to the reset terminal R of the flip-flop 31 via the delay circuit 32, and the flip-flop 31 is reset. At this time, since the flip-flop 31 has reset priority, when the output of the abnormality detection device 20 for the long object 1 is <IHII, the output terminal Q of the flip-flop 31 maintains "H". Further, the output of the abnormality detection device 20 for the long object 1 is ti
When L II, the output terminal Q of the flip-flop 31 becomes "L 11," which is the output of the pulse generator 36 and stored in the flip-flop 31.

In this way, the abnormal output of the abnormality detection device 20 for the long object 1 is temporarily stored in the flip-flop 31, and is written into the shift register 40 using the output of the pulse generator 36.
The long object 1 is shifted in the shift register 40 at the transport speed.

Further, the transfer speed of the long object 1 transferred by the take-up machine 24 is detected by the rotary encoder 35,
A pulse generator 3 generated using a signal generated by
The output of 6 is input to the counter 38, and the counter 38 counts up the counter 38 in the same manner as the shift 1 to the register 40, and the speed at which the counter 38 is counted up is the same as the transfer speed of the take-up machine 24. The counter 38 sets its output to "Hl+" at a predetermined count value, and the output L (HII) of the counter 38 operates the cutting machine 27 via the driver 39 to cut the long object 1 into a predetermined length. By setting the predetermined count value of the counter 38 to a value corresponding to the transfer distance of the long object 1 transferred by the take-up machine 24, the predetermined length of the long object 1 to be cut by the counter 3B is measured. The counter 38 is cleared when it reaches a predetermined count value.

The abnormality output of the abnormality detection device 20 for the long object 1 written in the shift 1 to the register 40 corresponds to the distance at which the long object 1 transported by the take-up machine 24 reaches the position of the marking device 23. A plurality of corresponding bits before and after are input to a logic circuit 34 consisting of an OR gate, etc., and it is determined whether or not 11H11 of the abnormal output of the abnormality detection device 20 is recorded in the pins input to the logic circuit 34. judge,
When the abnormal output llHII of the abnormality detection device 20 is stored in the pins 1 to 1 inputted to the logic circuit 34,
The output of the logic circuit 34 operates the marking device 23 via the driver 33 to mark the abnormal part of the long object 1 so that the defective part can be confirmed.

Similarly, the abnormal output of the abnormality detection device 20 of the long object 1 written in the shift register 40 indicates that the long object 1 of a predetermined length cut by the cutting machine 27 is transferred by the take-up machine 24. The abnormality detection device 20 determines whether the
A logic circuit 37 consisting of an OR gate etc. is separated from all the bits corresponding to the cut long object 1 of a predetermined length by separating the bits corresponding to the distance from the cutting @ 27 to the position of the integrated sorting machine 28. When the abnormal output of the abnormality detection device 20 is "'H" is stored in one or more of the input signals corresponding to the elongated object 1 of a predetermined length, the output of the logic circuit 37 is set as "'H". H''.

In addition, all bits corresponding to a long object 1 of a predetermined length are 11 L
When II, the output of the logic circuit 37 is set to "'L".
shall be. When the output of the logic circuit 37 is HII,
Counter 3B outputs 11 H11 with a predetermined count value.
Then, at 11 HIT of the output of counter 3B, the cutting machine 27
to cut the long object 1 to a predetermined length, and at the same time,
The output of the AND gate 41 becomes "H1+", and the sorting machine 28
is driven to discharge the long object 1 cut into a predetermined length to the defective product container 30 side. Note that when the output of the logic circuit 37 is "LI+" and does not contain any abnormality, the counter 38 converts the output to "'l-1" with a predetermined count value.
Even if the cutting machine 27 is operated by the "H" output of the counter 38 and the long object 1 is cut into a predetermined length, the output of the AND gate 41 becomes "L" and the sorting machine 28 is not driven. . Therefore, the long object 1 cut into a predetermined length is discharged to the product container 29 side, which is the normal transport direction.

In this way, the long object 1 continuously extruded by the extruder 21
The abnormality determination device 20 detects an abnormality from image information, and when a partial abnormality is detected in the long object 1, the abnormality is stored in the shifter 1 to the register 40. When the abnormal part of the long object 1 is transferred to the marking device 23, the abnormal signal stored in the shift register 40, which is shifted in synchronization with the transfer of the long object 1, is detected by the logic circuit 34, and the abnormality signal is detected by the logic circuit 34. 34 drives the marking device 23 via the driver 33 to mark the abnormal location on the long object 1. Note that the pitch 1-length detected by the logic circuit 34 determines the marking width to be attached to the abnormal location on the elongated object 1.

Further, the long object 1 continuously extruded by the extruder 21 is opened by a counter 38, and is repeatedly cut into predetermined lengths by a cutting device 27. If a long object 1 that has been repeatedly cut to a predetermined length has an abnormal spot marked by the marking device 23 in each unit of the long object 1 of a predetermined length, the abnormal part is marked when the long object 1 is transferred. Shift register 40 shifted synchronously
The logic circuit 37 detects the bit length in which the abnormality information of the cut long object 1 of a predetermined length is stored, and the abnormality information is stored in the bit length corresponding to the cut long object 1 of the predetermined length. When this is detected by the logic circuit 37, the sorting machine 28 is operated to discharge the cut long objects 1 of a predetermined length having abnormal parts to the defective product storage container 30 side. In addition, if no abnormality is detected, the sorting machine 28
A long object 1 of a predetermined length that has been cut while not operating is discharged to the side of the product storage machine 29 which serves as a container for the number of non-defective products.

In this way, the long object abnormality determination device of this embodiment uses the three imaging means 4a, 4b, 4 arranged around the long object 1.
G, and the imaging means 4a, 4b.

An image synthesizing means such as a multiplexer 8 which vertically synthesizes the image information detected by the 4C to form three image information in the middle of one screen, and an image synthesizing means such as a multiplexer 8 which combines the image information detected by the 4C in the vertical direction, and the long object 1 from the output signal of the image synthesizing means.
an abnormality detecting means comprising a determination circuit 17 that inputs only image information from the output of the synchronization separation circuit 13 to a differentiating circuit and compares the output of the differentiating circuit 15 with a predetermined threshold; and abnormality detection means for identifying an abnormality in the long object where an abnormality is detected based on the output of the means.

Therefore, the shape of the long object 1 is determined by the three imaging means 4a, 4.
．． b and 4c are used as image information, and the image synthesis means such as the multiplexer 8 converts the images into three image information in the middle of one screen. 1 form with three imaging means 4a, 4b, 4G
Although the image information is image information, the circuit for determining abnormality in one screen, that is, the three imaging means 4a, 4b, 4c.
It is necessary to output the output of one screen, so it is sufficient to have a circuit to detect the output of one imaging means.
The configuration of the device can be made inexpensive.

In addition, the image capturing means 4 can be
a, 4. b. Since the image information of the long object 1 detected by 4G is vertically combined to create 3 image information in the middle of one screen, an abnormality at a predetermined position on the horizontal scanning line can be detected by detecting the horizontal synchronization signal. By selecting the position setting for detecting the abnormality, the influence of the surface illuminance of the long object 1 can be reduced.

A shift register 40 serves as an abnormality detection means for identifying an abnormality part of the long object in which an abnormality has not been detected by the output of the abnormality detection means. The marking position is detected and an abnormality within the cutting distance is detected based on the moving distance of the shift register 40. Therefore, the abnormal location can be confirmed by a person, and when the abnormal location is divided into two cutting distance lengths, the abnormal location and its degree can be visually recognized, so that the accuracy of sorting can be improved.

By the way, 3 arranged around the elongated object 1 of the above embodiment
When determining the entire circumference of the elongated object 1, the imaging means 4a, 4b, and 4C on the stand are desirably set in a state where the surface thereof can be photographed as perpendicularly as possible. Therefore, when implementing the present invention, it is desirable that the number of imaging means be three or more. Of course, even when determining the partial circumference of the elongated object 1, it is desirable to install three or more imaging means depending on the form of the cross section of the elongated object 1.

Further, the image synthesizing means such as the multiplexer 8 which vertically synthesizes the image information detected by the image capturing means 4a, 4b, and 4C of the above embodiment to produce three image information in units of one screen, is configured to combine the image information detected by the image pickup means 4a, 4b, and 4C in the above embodiment in advance. The imaging means 4a.

4b, 4CTJtt image of long object 1a, 1b, 1G
The imaging means 4a covers the top one-third area of one screen unit,
II! The imaging means 4b is located in the upper one-third to two-thirds of the screen, and the imaging means 4C is located in the upper two-thirds to three-thirds of the screen. When carrying out the present invention, since it is sufficient to combine the image information of the imaging means in the vertical direction, the imaging means is set so that the long object image taken by the imaging means is located at the center of one screen unit. , image information detected by the imaging means may be combined in the vertical direction with a delay means interposed.

Then, only the image information from the output of the synchronization separation circuit 13 which detects a partial abnormality of the long object 1 from the output signal of the image synthesis means of the above embodiment is input to the differentiating circuit, and the differentiating circuit 1
The abnormality detecting means consisting of the determination circuit 17 that compares the output of No. 5 with a predetermined threshold value is a means for detecting discontinuous parts such as scratches. It is also possible to compare the approximate states of each other. In addition, when the scratches etc. that occur due to the properties of the long object 1 become large, the detection by the differential circuit 15 is to detect the ends of the scratches, but the range of the scratches can be determined by detecting both ends using a flip-flop or the like. can be detected.

The abnormality detection means for identifying the abnormality part of the long object 1 where an abnormality is detected by the output of the abnormality detection means of the above embodiment is a shift register that matches the output of the abnormality detection means with the transport speed of the long object 1. 40, and the marking position is detected and an abnormality within the cutting distance is detected based on the moving distance of the shift register 40. However, when carrying out the present invention, it is sufficient to read out the output of the abnormality detection means from the stored means using a signal synchronized with the transport speed of the long object 1. That is, for example, the storage location is fixed, the ring counter is rotated with a signal synchronized with the transport speed of the long object 1, and the predetermined storage location is controlled to be called at the rotating position of the ring counter. Good too.

In the above embodiment, three or more imaging means are used to capture the long object 1.
Although an example has been described in which the configuration is configured to detect the entire circumference of the elongated object 1, when implementing the present invention, even if the configuration is configured to detect the main part of the elongated object 1 using two imaging means, the same result can be obtained. effect can be obtained.

[Effects of the Invention] As described above, the long object abnormality determination device of the present invention detects abnormalities using two or more imaging means arranged around the long object that is continuously transported in the length direction. image compositing means for compositing image information in the vertical direction to create two or more images in one screen unit;
abnormality detection means for detecting a partial abnormality of the long object from the output signal of the image synthesis means; and abnormality point detection for identifying an abnormality point of the long object where an abnormality is detected by the output of the abnormality detection means. Since it is equipped with means, the image of multiple screens is input to the abnormality detection means as an image input of one screen, and there, the partial abnormality of the long object is detected, and the abnormality point detection means The abnormal location of the detected long object can be specified.

At this time, the image information of each screen of two or more imaging means is extracted and synthesized to determine the form of the long object, and the image information is processed as one screen of image information output. There is no need to make the illuminance uniform. Furthermore, since the abnormality detection accuracy is determined by the accuracy of the imaging means, the device can be manufactured at a relatively low cost compared to its accuracy. Therefore, the influence of the shape of the long object and its surface illuminance can be reduced.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the overall configuration of an abnormality detection device constituting an abnormality determination device for a long object according to an embodiment of the present invention, and FIG.
The figure shows an example of a production system using an abnormality determination device for long objects according to an embodiment of the present invention. In the figure, 1: long object, 4a, 4b, 4C: image means, 8: multiplexer, 13: synchronous separation circuit, 15:
17: Determination circuit. In addition, in the figures, the same reference numerals and the same symbols indicate the same or equivalent parts. Patent applicant Toyoda Gosei Co., Ltd.

Claims (2)

[Claims] (1) Two or more imaging means arranged around a long object that is continuously transported in the length direction, and the image information detected by the imaging means are vertically synthesized, one screen at a time. an abnormality detecting means for detecting a partial abnormality of the elongated object from an output signal of the image combining means; An abnormality determination device for a long object, comprising: an abnormality detection means for identifying an abnormality point of the long object. (2) The abnormality determination device for a long object according to claim 1, wherein the two or more imaging means arranged around the long object are arranged concentrically. .