JPH01143980A - Defect parts display device for parts mounting circuit board - Google Patents

Abstract

PURPOSE:To easily allow the title device to correspond to a real circuit board and to shorten a repairing time by displaying the parts mounting face of the circuit board to be inspected on a display such as a CRT and directly displaying the positions of NG parts on the screen. CONSTITUTION:The image of the parts mounting face of the circuit board to be inspected picked up by a video camera 1 is converted into a digital signal including picture elements, brightness, etc., by an image input unit 2 and the signal is stored in an image memory 4. Then, various kinds of information relating to the parts is inputted by operating an input means 7 and stored in the memory 4. Then, the circuit board is inspected by an incircuit tester 10, and when an NG signal is outputted, a microcomputer 3 retrieves the name of the parts stored in the memory 4 based on the information, converts the image signal into a video signal and displays the parts mounting face on the CRT 6. A specific mark such as * is displayed on the parts based on the NG parts position information. Consequently, the position of the NG parts can be observed at a glance. Messages such as the name of the parts and the cause of the defect can be simultaneously displayed.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention provides a component-mounted circuit board that obtains NG information from a circuit board inspection machine such as an in-circuit tester and displays defective locations on a display such as a CRT. This invention relates to a defective parts display device.

[Conventional example]

According to an in-circuit tester, the characteristics of individual components mounted on the circuit board under test.

The quality of the connection status, etc. is determined within a short period of time, and the results are displayed on a display such as a CRT. In that case, if the product is determined to be defective, it will be marked as "NG" and
In order to facilitate repair, it is displayed which component is the cause of the defect, and examples of this display are shown in FIGS. 3a and 3b.

That is, in the conventional example shown in FIG. 3a, a matrix-like frame corresponding to the circuit board to be inspected is displayed on both sides of the CRT, and a symbol "R10", which is the name of the component, is placed inside the box corresponding to the position of the failed component. Display. Figure 3b shows an example of printing out with a printer, which shows the defect reason rUNDER-RANGEJ, step number "9", part name rR10J, and its place 1! rD1”
etc. are printed on the recording paper P.

[Problem that the invention seeks to solve]

In the former display example above, you can roughly tell where the NG part is located, but when you actually look for it on the circuit board, it is difficult to find it with just such general information.According to the latter display example, Although it is possible to obtain detailed information about a component, it has the disadvantage that it still takes a considerable amount of time to search for the corresponding component on the circuit board from the printout.

[Means for solving problems]

In order to solve the above-mentioned conventional drawbacks, the present invention provides a
In a defect display device for a component-mounted circuit board that obtains G information and displays the defective location on a display such as a CRT,
an image memory that stores an image of the component mounting surface of the circuit board to be inspected captured by a video camera; a display that displays the image of the component mounting surface stored in the image memory; input means for inputting information regarding each of the mounted components from the component mounting surface; and component information storage means for storing the component information;
Information consisting of a microcomputer that reads out component information corresponding to the NG information from the component information storage means based on the NG information from the circuit board inspection machine, and displays a specific mark on the NG component together with the component mounting surface on the display. processing means.

[For production]

According to the above configuration, the actual component mounting surface of the circuit board to be inspected is displayed on a display such as a CRT.

A specific mark is displayed at the corresponding position of the NG component on the component mounting screen.

〔Example〕

Hereinafter, embodiments of the present invention will be described in detail with reference to FIGS. 1 and 2.

According to this defective component display device for a component-mounted circuit board, first, as a preparatory step, the component-mounting surface of the circuit board to be inspected (not shown) is imaged using a video camera 1. Both sides are imaged. The still image captured by the video camera 1 is stored in the single image capture unit 2.

The signal is converted into a digital signal including information on pixels, their brightness, color, etc., and stored in the image memory 4 according to a write command from the microcomputer 3, which is an information processing means. Note that this image signal may be stored in an auxiliary storage means 5 such as a floppy disk. After storing the image signal in the image memory 4 as described above, the microcomputer 3 reads out the image signal and stores it on the CRTB. The component mounting surface is displayed. This device has an input means 7 consisting of, for example, a keyboard or a mouse, and by operating this input means 7, component names, position information, etc. of each component mounted on a circuit board are input. That is, while looking at the component mounting surface displayed on the CRTS, the operator operates the input means 7 to move the cursor onto the component and inputs various information regarding the component, such as name and position data. These parts information are stored in the one-image memory 4 together with the above-mentioned image signal, for example. Note that 8 is a memory for operating programs of the microcomputer 3, and 9 is a video printer for printing out images displayed on the CRT 6.

The above is the preparation stage for using this device, and after such pretreatment, the circuit board is tested by the in-circuit tester 10. In-circuit tester 1
When the NG signal is output from 0, the microcomputer 3
searches for the part name stored in the image memory 4 from the part name code included in the NG signal, for example, and selects the CR
Obtain its position information on the TS. Then, the image signal in the image memory 4 is converted into a video signal to display the component mounting surface on the CRT 6, and a specific mark such as a "skewer" is displayed on the corresponding component based on the NG component position information. FIG. 2 shows an example of the display on the CRT 6 at that time, which allows the location of the defective parts to be identified at a glance. Furthermore, if a message 11 such as the name of the part, the number of the probe pin, and the reason for the failure is displayed at the same time, repairs can be performed more accurately. on the other hand,
If a hard copy of the video is required, the video printer 9 can be operated.

In the above embodiment, the component information is stored in the image memory, but it goes without saying that a dedicated memory may be provided. Moreover, the parts information can be stored in the auxiliary storage means together with the image signal, and in this way -
Once stored, pre-processing for the same substrate can be omitted during subsequent inspections. On the other hand, in the above embodiment, N
Although G information is obtained, this device can also be connected to a board tester.

〔Effect of the invention〕

As explained above, according to the present invention, the component mounting surface of the circuit board to be inspected is projected on a display such as a CRT,
By directly displaying the location of the NG component on the screen, it is easy to deal with the actual circuit board, and the repair time can be shortened.

[Brief explanation of the drawing]

FIG. 1 is a circuit block diagram showing an embodiment of the present invention.
FIG. 2 is an explanatory diagram showing the display state of the CR1 screen according to the same embodiment, and FIGS. 3a and 3b are explanatory diagrams showing conventional display examples, respectively. In the figure, 1 is a video camera, 2 is an image input unit, 3 is a microcomputer, 4 is an image memory, 5 is an auxiliary storage means, 6 is a CRT, and 7 is an input means. 9 is a video printer, and 10 is an in-circuit tester.

Claims (1)

[Claims] NG from a circuit board inspection machine such as an in-circuit tester
A defective component display device for a component-mounted circuit board that obtains information and displays the defective location on a display such as a CRT has an image memory that stores an image of the component-mounted surface of the circuit board to be inspected taken by a video camera. , a display for displaying an image of the component mounting surface stored in the image memory, an input means for inputting information regarding each of the mounted components from the component mounting surface displayed on the display, and input means for inputting the component information. a parts information storage means for storing;
Information consisting of a microcomputer that reads out component information corresponding to the NG information from the component information storage means based on the NG information from the circuit board inspection machine, and displays a specific mark on the NG component together with the component mounting surface on the display. 1. A defect display device for a component-mounted circuit board, comprising a processing means.