JPH0526814A - Inspection result output method in board inspection device - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide an inspection result outputting method capable of accurately and quickly confirming a defective portion such as a defective soldering on a substrate. [Structure] The display screen 7 of the display section is provided with an image display section c and a defective part information display section b. Each image of the board outline and the component outline is displayed on the image display section c, and vertical and horizontal grid-like dividing lines 34 and 35 for dividing the board region into a plurality of areas are displayed graphically. In the defective part information display portion b, the name or number 40 of each defective part and the address 41 of the area to which the part belongs are represented by characters.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a board inspecting apparatus used for inspecting a mounting component on a printed circuit board, for example, for soldering failure.
The present invention relates to an inspection result output method for displaying an inspection result such as a soldering failure by a board inspection device on a display screen or a print surface.

[0002]

2. Description of the Related Art Generally, a board inspection device is equipped with an output device such as a monitor television or a printer, and outputs inspection results such as soldering defects of mounted components on a printed circuit board to the output device for image or printing. It is displayed in the form of.

FIG. 6 shows an example of a conventional display. In the figure, reference numeral 1 is an image showing a board outline, and 2 is an image showing a component outline. Further, a black-painted image 2 shows a mounted component having a defective soldering, and a certain number (for example, 10) of the mounted component is surrounded by a circular image 3.

The operator collates the display screen of the monitor television or the printing paper of the printer with the printed circuit board to find a mounted component having a soldering defect, and performs correction work.

[0005]

However, in recent years, the mounting density of components on a printed circuit board has increased and the size of the components has been reduced. Therefore, in the conventional output method, it is not easy to confirm the defective components, and the confirmation work is difficult. Not only is it time consuming,
There are problems such as mistakes and oversight of defective parts.

The present invention has been made in view of the above problems, and an object of the present invention is to provide an inspection result output method in a substrate inspection apparatus capable of accurately and quickly confirming a defective portion on a substrate.

[0007]

SUMMARY OF THE INVENTION The present invention relates to a method for outputting inspection results in a substrate inspection apparatus, which is a grid-like division for dividing the outer shape of the substrate into a plurality of areas on the surface for displaying or printing the inspection results. In addition to representing the line, the information for identifying the inspection target on the substrate and the information for identifying the area where the inspection target is located are also represented.

[0008]

[Function] Since the outer shape of the board is divided into a plurality of areas by the grid-like dividing lines, and the information (part number, name, etc.) for specifying the defective portion and the area where the defective portion is located are represented together. , It is possible to accurately and quickly confirm the defective portion on the substrate.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows the appearance of a substrate inspection apparatus in which the present invention is implemented. A display unit 5 and an observation unit 6 are provided on the upper surface of a machine base 4. The display unit 5 is formed by using a color monitor television, and the display screen 7 is arranged diagonally upward.

The observing section 6 has a hood 9 on a table 8.
The observation system is arranged inside the hood 9, and the printed circuit board to be inspected is guided into the hood 9 by the transport mechanism 10.

FIG. 2 shows the configuration of the observation system 11 and the circuit configuration of the control processing unit 12 connected to the observation system 11. The observation system 11 includes an X-axis table unit 13, Y
The axis table unit 14, the light projecting unit 15, and the image pickup unit 16 are included as components.

The X-axis table unit 13 and the Y-axis table unit 14 are equipped with motors (not shown) that operate based on the control signals from the control processing unit 12, and the X-axis table unit 13 is driven by these motors. Moves the imaging unit 16 in the X direction, and the Y-axis table unit 14 moves the printed circuit board 1
The conveyor 18 supporting 7 is moved in the Y direction.

The light projecting section 15 has different diameters and receives the red light, the green light, and the red light based on the control signal from the control processing section 12.
Three annular light sources 19 and 2 that simultaneously emit blue light
The light sources 19 to 21 are centered directly above the observation position and positioned in directions corresponding to different elevation angles when viewed from the observation position.

The image pickup unit 16 is a color television camera, and is positioned directly above the observation position so as to face downward. As a result, the reflected light image of the surface of the printed board 17 to be inspected is picked up by the image pickup unit 16, converted into the color signals R, G, B of the three primary colors and supplied to the control processing unit 12.

The control processing unit 12 includes an A / D conversion unit 2
2, memory 23, teaching table 24, image processing unit 25, determination unit 26, XY table controller 27,
It is composed of an image pickup controller 28, a display unit 5, a printer 30, a keyboard 31, a floppy disk device 32, a control unit 33, etc., and processes the color signals R, G, B for the reference board in the teaching mode, Red, green, and
Each of the blue hue patterns is detected to create a judgment data file, and in the inspection mode, the color signals R, G, and B for the inspection object are processed, and the same for each predetermined area of each component on the printed circuit board. The hue pattern is detected and the data file to be inspected is created. Then, the data file to be inspected is compared with the determination data file, and the quality of soldering is automatically determined for a predetermined component on the printed board to be inspected from the comparison result.

The A / D conversion unit 22 converts the color signals R, G, B from the image pickup unit 16 into digital signals and outputs them to the control unit 33. The memory 23 includes a RAM and the like and is used as a work area of the control unit 33. The image processing unit 25 performs image processing on the image data supplied via the control unit 33 to create the inspection data file and the determination data file, and supplies these to the control unit 33 and the determination unit 26.

The teaching table 24 stores the judgment data file when it is supplied from the control unit 33 at the time of teaching, and when the control unit 33 outputs a transfer request at the time of inspection, the judgment data file is stored according to this request. The control unit 33 reads out and supplies it to the determination unit 26 and the like.

The judging section 26 compares the judgment data file supplied from the control section 33 at the time of inspection with the inspected data file transferred from the image processing section 25 to judge whether the inspection object is good or bad for soldering. Then, the determination result is output to the control unit 33.

The image pickup controller 28 has an interface for connecting the control unit 33 to the light projecting unit 15 and the image pickup unit 16, and adjusts the light amount of each of the light sources 19 to 21 of the light projecting unit 15 based on the output of the control unit 33. Or control such that the hue light outputs of the image pickup unit 16 are maintained in mutual balance.

The XY table controller 27 is a controller 3
3, the X-axis table unit 13 and the Y-axis table unit 14
The control unit 33 is provided with an interface for connecting with
The X-axis table unit 13 and the Y-axis table unit 14 are controlled based on the output of.

The display unit 5 displays image data from the control unit 12,
When inspection results, key input data, etc. are supplied, they are displayed on the display screen 7, and when the inspection results etc. are supplied from the control unit 33, the printer 30 displays them in a predetermined format. ) To print out.

FIG. 3 shows a display example of the inspection result displayed on the display screen 7 of the display section 5. This display screen 7
Is provided with a general information display section a, a defective part information display section b, and an image display section c. The general information display section a displays characters such as a display style, a board number, and the number of defective parts. To be done.

In the image display section c, each image of the board outline and the component outline is displayed, and vertical and horizontal grid-like partition lines 34 and 35 for partitioning the board region into a plurality of areas are graphically displayed. ..

FIG. 4 shows a display example of the image display section c. In the figure, 36 shows an image of the board outline and 37 shows an image of the component outline. Image 37 of the part outline
Are displayed in the board outline image 36 in correspondence with the component mounting positions on the printed board. Further, the image 37 of the outer shape of the component is painted black for the component having the defective soldering, and is in the white state for the component having the defective soldering. A circle image 38 is displayed so as to surround the image 37 of the external shape of a certain number (10 in this example) of the defective soldering parts.

On the image 36 of the board outline, eight partition lines 34 in the vertical direction and eight partition lines 35 in the horizontal direction are graphically displayed in a grid pattern, and the image area of the board is divided into these partition lines. 34 × 35, 9 × 9 rectangular area 3
It is divided into nine.

In each area 39, A to A in the lateral direction (X-axis direction).
The addresses of I are assigned addresses 0 to 8 in the vertical direction (Y-axis direction), and all areas 39 can be specified by a combination of these vertical and horizontal addresses. In this embodiment, characters representing each address are displayed at corresponding positions, and, for example, three parts are present in the area specified by (B, 7). The number of the dividing lines 34 and 35 may be determined each time according to the substrate size or the like, or may be fixed to a fixed number.

Returning to FIG. 3, the defective part information display section b
Displays information about a part having a soldering failure. In this embodiment, the name or number 40 of each part having a soldering failure and the address 41 (of the area 39 to which the part belongs ( In the figure, it is shown in parentheses). Further, in this embodiment, the information about 10 defective parts in total is simply displayed side by side in the order of inspection, but the invention is not limited to this, and it is also possible to display the information separately for each area, and information on all defective parts. Can also be displayed.

Although only the method of outputting the inspection result on the display screen 7 of the display unit 5 has been described above, the printer 3
Printing is also performed in the same display mode in the format printed out by 0, and the description thereof is omitted here.

Returning to FIG. 2, the keyboard 31 is for inputting operation information, data relating to the reference board, data relating to parts on the reference board, and the key input data is supplied to the control section 33. .. The control unit 33 includes a microprocessor or the like, controls the operation of each input / output unit, and executes various calculations and processes while reading / writing data from / to the memory 23.

FIG. 5 shows a control procedure by the control unit 33 for displaying the inspection result on the display unit 5. First, prior to the inspection, the display form of the inspection result is selected by operating the keys of the keyboard 31. If the display format shown in FIG. 3 is selected, the determination in step 1 (indicated by “ST1” in the figure) is “YES”, and in the next step 2, the soldering inspection of the mounted components is performed for the inspection object. is, the coordinate position on the image 36 of the name or number and the board outline for all defective component (Px _n, Py _n) (where n
Represents the order of detection of defective parts) and is stored in the memory 23 as a pair. In the image 36 of the board outline, the lower left corner is the origin 42 (see FIG. 4) of the coordinates.

As a result of the inspection, if there is a mounting component having a defective soldering, the determination in step 3 is "YE".
S ”, and then in step 4, the control unit 33 controls the substrate sizes x and y which have been keyed in advance, the pixel resolution P of the observation system 11, and the intervals dx and dy (however, the number of pixels) of the section lines 34 and 35. Using and, the numbers Nx and Ny of the horizontal and vertical sections of the board outline image 36 are calculated by the following equation.

[0032]

[Equation 1]

[0033]

[Equation 2]

Next, in step 5, the control unit 33 sets the counter n to the initial value 1, and then in step 6, the area 39 to which the n-th (n = 1 in this case) detected defective part belongs The horizontal and vertical numbers are calculated by the following formula. In the following equation, Gx _n , Gy _n
Is a value indicating the number of the area 39 to which the defective part belongs. In the example shown in FIG. 4, the area of the address "A" if Gx _n = 1, an area of addresses "B" if Gx _n = 2, respectively, also if Gy _n = 1 address " The area of "0" is shown, and the area of address "1" is shown if Gy _n = 2.

[0035]

[Equation 3]

[0036]

[Equation 4]

In the next step 7, the control unit 33 increments the counter n and calculates the area 39 to which the next defective part belongs by the same method (step 6). When the area 39 to which all the defective parts (N pieces) belong is calculated, the determination in step 8 becomes “YES” and the process proceeds to step 9, and an image of the board outline is displayed on the display screen 7 of the display unit 5. 36, an image 37 of the outline of all parts in which quality is distinguished, and division lines 34, 35 in each of the vertical and horizontal directions are displayed graphically, and the name or number 40 of a predetermined number of defective parts and its The address 41 of the area to which the part belongs is displayed in characters.

When the standard format is selected as the display format of the inspection result, the judgment in step 1 is "NO", and the inspection result in step 11 is the step if no defective part exists. From step 12 to step 10, the good display is performed in the standard format. On the other hand, if there is a defective part, the process proceeds from step 12 to step 13 and the defective display is performed in the standard format. Even if the display format of FIG. 3 is selected, if the result of the inspection in step 2 is that there is no defective part, step 3 to step 10
Proceed to and a good display will be given in the standard format.

[0039]

As described above, according to the present invention, a grid-like dividing line for dividing the outer shape of a substrate into a plurality of areas is displayed on the surface for displaying or printing the inspection result, and the inspection target on the substrate is specified. Information and the information that identifies the area where the inspection target is located can be displayed together, so that defective parts on the board can be confirmed accurately and quickly, and defective parts can be identified when inspecting mounted parts on the printed circuit board. There is no risk of mistakes or oversight.

[Brief description of drawings]

FIG. 1 is a perspective view showing an external appearance of a board inspection apparatus according to the present invention.

FIG. 2 is an explanatory diagram showing a configuration of an observation system and a circuit configuration of a control processing unit.

FIG. 3 is an explanatory diagram illustrating a display example of a display unit.

FIG. 4 is an explanatory diagram showing an enlarged outer shape of the substrate of FIG.

FIG. 5 is a flowchart showing a control procedure by a control unit.

FIG. 6 is an explanatory diagram showing a conventional inspection result display method.

[Explanation of symbols]

 5 Display 7 Display screen 34, 35 Dividing line 36 Board outline image 40 Name or number of defective part 41 Address of area to which defective part belongs

Claims (1)

Claim: What is claimed is: 1. A grid-like dividing line for dividing the outer shape of the substrate into a plurality of areas is displayed on the surface on which the inspection result is displayed or printed, and the inspection target on the substrate is specified. Information and the information specifying the area in which the inspection target is located are also represented, and the inspection result output method in the substrate inspection apparatus.