JPS62190448A - Inspecting device for parts mounted board - Google Patents

Abstract

PURPOSE:To reduce numerical data inputted on a keyboard by inspecting parts on a board to be inspected based on the reference board information read out of a dictionary part and information to be inspected which is obtained by picking up the image of the board to be inspected. CONSTITUTION:A control part 28 reads out reference data obtained from respective parts 19-1-19-n on a reference printed board 16-1 to generate the reference board information, which is stored in a memory 24. Then, the control part 28 transfers the reference board information stored in the memory 24 to a decision part 25 in inspection mode. The control part 38 generates image data to be inspected from the image signal of the printed board 16-2 to be inspected which is obtained through a TV camera 20 and transfers it to an image processing part 23. Then, the processing part 23 extracts parameters of the respective parts 19-1-19-n to be inspected and supplied them to the control part 28. The control part 28 puts those parameters to be inspected together to form an inspected parameter file, which is sent to the decision part 25. The decision part 25 compares it with the reference board information to inspect the positions and kinds of the parts 19-1-19-n on the board 16-2.

Description

Detailed Description of the Invention (Industrial Application Field) The present invention processes an image obtained by capturing an image of a board to be inspected on which components are mounted to determine whether or not there is a component on the board to be inspected. The present invention relates to an inspection device for component mounting boards that inspects components, etc.

(Prior Art) When an automatic mounting device is used to mount various chip components such as resistors and semiconductor elements on a printed circuit board, the components may not be mounted according to the mount data after mounting.

Therefore, when using such automatic mounting equipment, the printed circuit board is checked after mounting to ensure that the correct chip components are mounted in the correct position and orientation (position and direction) on the printed circuit board. Whether there is
It is also necessary to inspect whether or not it has fallen off.

However, if such an inspection is performed by manual visual inspection as in the past, there are problems in that the occurrence of inspection errors cannot be completely eliminated and the inspection speed cannot be increased.

Therefore, in recent years, various manufacturers have proposed various automatic inspection systems for printed circuit boards that can automatically perform this type of inspection.

FIG. 7 is a block diagram showing an example of such an automatic inspection device.

The automatic inspection device shown in this figure includes a TV camera 3 that conveys an image of a printed circuit board 2-2 to be inspected on which a component 1 is mounted, and data input from a keyboard 8, that is, a reference board as shown in FIG. Data regarding the type of standard printed circuit board 2-1, the design of each component 1 on this standard printed circuit board 2-1, the orientation of the mounting, the shape, the color, etc.
A storage unit 4 that stores data regarding reflectance, etc., and information (data) regarding inspection processing procedures for each of these parts 1.
The information stored in the storage unit 4 is compared with the information shown by the image from the TV camera 3 to determine whether all the parts 1 are present on the printed circuit board 2-2 to be inspected and whether or not they are present. The device includes a determination circuit 5 that determines whether or not the component 1 is displaced or not, and a display 6 that displays the determination result of the determination circuit 5.

When using this automatic inspection device, before inspecting the printed circuit board 2-2 to be inspected, first enter data regarding the reference printed circuit board 2-1 on which each component 1 is correctly placed on the bare board 7 from the keyboard 8 ( teaching).

In this case, as shown in the flowchart of FIG. 9, in this teaching operation, the card number of the reference printed circuit board 2-1 is input from the keyboard 8 in step STI.

Next, in step ST2, the position, shape, characteristics (information such as color 1 anti-copper ratio of this component 1) and processing procedure (for example, an image of the component) of the component 1 mounted on the reference printed circuit board 2-1 are input from the keyboard 8 in step ST2. 2, which is the standard when binarizing
Numerical data regarding the valuation threshold, type of extraction parameter, etc.) is input.

Next, in step ST3, it is checked whether numerical data regarding all parts 1 have been input. If there is a part for which numerical data has not been input yet, the process returns from this step ST3 to step ST2 to apply I/O to the remaining parts. ! !・Numeric data input is executed repeatedly.

When data input for all parts 1 is completed, these numerical data are stored in the storage section 4 in step ST4.

Furthermore, when inspecting the printed circuit board 2-2 to be inspected,
The image of the printed circuit board 2-2 to be inspected taken by the TV camera 3 is processed according to the processing procedure stored in the storage unit 4, and the numerical data obtained thereby and the position of the component 1 output by the storage unit 4 are , shape, characteristics, etc. are compared by the determination circuit 5, and the comparison result is displayed on the display 6.

If a certain component of the printed circuit board 2-2 to be inspected, which is imaged by the TV camera 3, is missing, the T
The numerical data obtained based on the image output by the V-camera 3 and the numerical data output by the storage section 4 no longer match, and the determination circuit 5 detects this and displays the missing parts on the display 6. Display above.

(Problem to be solved by the invention) However, in such a conventional automatic inspection device, if the number of numerical data serving as judgment criteria is increased to improve inspection accuracy, it is necessary to The amount of data that must be entered increases,
There is a problem in that inputting this information requires a great deal of time and effort.

In addition, for numerical data of processing procedures (for example, binarization threshold values, etc.) obtained by processing the image of the reference printed circuit board 2-1, this numerical data should be extracted in advance before teaching. Therefore, it is not possible to make the work easier or faster.

In addition, this type of data extraction work is performed on the standard printed circuit board 2-1.
By simply creating the numerical molecule li obtained by processing the image of
Since this numerical distribution cannot be understood intuitively, there is a problem in that only workers with highly advanced technical skills can extract data such as the binarization threshold area corresponding to each part 1. Ta.

In view of the above circumstances, the present invention makes it possible to reduce the number of numerical data input from the keyboard while increasing the inspection viscosity, and also to reduce the number of numerical data input from the keyboard. It is an object of the present invention to provide a component mounting board inspection device that can be easily taught.

(Means for Solving the Problems) In order to solve the above-mentioned problems, an inspection apparatus for a component-mounted board according to the present invention processes an image obtained by imaging a board to be inspected on which components are mounted. A component mounting board inspection device for inspecting components on a test board includes: a dictionary section that stores in advance reference data for each component to be mounted on the board to be tested; a control unit that reads component reference data from the dictionary unit according to one type of component position to create reference board information; and inspected information obtained by performing an IS image of the reference board information and the inspected board; and a determination unit that inspects the components on the board to be inspected based on the above.

(Embodiment) FIG. 1 is a block diagram showing an embodiment of a component mounting board inspection apparatus according to the present invention.

The component mounting board inspection device shown in this figure inspects each of the components 19-1 to 1- mounted on the reference printed circuit board 16-1.
If the position data of n and the type data are entered manually, each part 19 is selected from the dictionary section 35 based on these type data.
-1 to 28-n, the shape data D3, the chip size data D4, and the binarization threshold D5 are read out to create a processing table 37 (see FIG. 5). The reference printed circuit board 16-1 (or the printed circuit board 1 to be inspected) is
6-2) is configured so that the image is processed and parameters are extracted, and includes an X-Y table section 10,
An imaging unit 11, a processing unit 12, a determination result output unit 26,
It includes an information input section 27, a table controller 29, and an imaging controller 30.

The X-Y table section 10 includes two pulse motors 13 and 14 controlled by a table controller 29, a table 15 driven in the X-axis direction and the Y-axis direction by each of these pulse motors 13 and 14, and this table. A chuck mechanism 17 that fixes the reference printed circuit board 16-1 or the printed circuit board to be inspected 16-2 placed on the printed circuit board 15.
The reference printed circuit board 16-1 (or the printed circuit board to be inspected 1) placed on the table 15
6-2) is fixed by the chuck 111M17, its position in the X-axis direction and Y-axis direction is determined by each of the pulse motors 13.degree.14, and it is me by the m-image section 11.

In this case, the components 19-1 to 19-n are placed on the basic printed circuit board 16-1 at the correct position and in the correct orientation on the base board 18, as shown in FIG.

Further, the printed circuit board 16-2 to be inspected is a manufactured board in which components are arranged in the same manner as the components -1 to 19-n on the reference printed circuit board 16-1.

The imaging unit 11 is arranged above the X-Y table unit 10, and the focus, magnification, sensitivity, etc. of the imaging unit 11 are controlled by control signals output from the imaging controller 30.
A ring illumination device 2 which is arranged coaxially with respect to the camera 20 and the TV camera 20 and whose brightness etc. are controlled by a control signal outputted from the II image controller 30.
1, and the image signal (analog signal) obtained by the TV camera 20 is supplied to the processing section 12.

The information input unit 27 also includes the type of the reference printed circuit board 16-1 (for example, board number, etc.) and the type, number, and position of the components 19-1 to 19-n mounted on the reference printed circuit board 16-1. a keyboard and a mouse for inputting data and operation information such as processing procedures (for example, procedures for extracting parameters), etc., and a monitor for checking the input data and operation information.

It is configured to include a printer, etc., and input data, operation information, etc. from there are supplied to the processing section 12.

The processing unit 12 includes an image input unit 22, an image processing unit 23,
Memory 24, determination section 25, control section 28, dictionary section 3
5, and when in the teaching mode, the type data of the parts 19-1 to 19-n supplied from the information input section 27 is used to select each part from the part dictionary 836 (see FIG. 3) of the dictionary section 35. Shape data D3 of parts 19-1 to 19-n
, chip size data D4, and binarization threshold data D5
A window 31-1 as shown in FIG. 4 is read out from the shape data D3 and chip size data D4.
31-n, and the position data supplied from the information input section 27 and each of the parts 19-1 to 19.
-n windows 31-1 to 31-n and binarization 1
11111 [Processed data 37 associated with data D5
(See FIG. 5), using this processing table 37 and the processing procedure supplied from the information input section 27, the image signal of the reference printed circuit board 16-1 supplied from the moving section 11 is processed. Process each part 19-1 to 19
−n parameters (reference parameters) are extracted and stored. Also, this processing section 12, when in the inspection mode, uses the processing table 37! The printed circuit board 16-2 to be inspected is supplied from the imaging unit 11 using the 2!1 physical procedure or the like.
The image signals of each component 19-1 to 1 are processed.
9-n is extracted, the inspection parameters are compared with the reference parameters, and the quality of the printed circuit board 16-2 to be inspected is determined based on the comparison result. to be displayed.

In this case, the image input unit 22 of the imaging unit 11
The image data ( The reference printed circuit board 16-1 and the printed circuit board to be inspected 16- obtained in this process are
The image data regarding No. 2 is supplied to the control section 28 and the like.

As shown in FIG. 3, the dictionary section 35 stores manufacturer data Dl, model data D2, . Part shape data D3. Chip size data D/4. Binarization I
It is equipped with a parts dictionary 36 in which IW1 data D5, etc. are written, and when a data request signal is supplied from the control section 28 or the like, it reads out the data requested by this data request signal from the parts dictionary 36, The control section 28
Supply to etc.

The image processing section 23 also processes the image of the reference printed circuit board 16-1 supplied via the 611111 section 28 in the teaching mode based on the processing procedure, processing table 37, etc. supplied from the control section 28. The parameters (reference parameters) of each component 19-1 to 19-n are extracted from the data, and in the inspection mode, the Printed circuit board to be inspected 16
-n components 19-1 to 1-n parameters (parameters to be inspected) are extracted from the reference printed circuit board 16-1 (or the printed circuit board to be inspected 16-2) obtained here. ) are supplied to the control section 28, determination section 25, etc.

The memory 24 also receives the image data of the reference printed circuit board 16-1 from the control section 28, and receives the image data of the reference printed circuit board tFi from the control section 28.
When supplied with the parameters (reference parameters) 1 position data, type data, processing procedure, processing table 37, etc. of each component 19-1 to 19-n on 16-1, it stores these. When there is a transfer request from the pre-control m+ unit 28, these standard parameters etc. are sent to the image@
The signal is supplied to the processing unit 23, the determination unit 25, and the like.

The determination unit 25 compares the reference parameters outputted by the memory 24 in the inspection mode with the parameters to be inspected obtained by the image processing unit 23 supplied via the control unit 28, and determines the parameters to be inspected. 1. Check whether the parts 19-1 to 19-n of the inspection printed circuit board 16-2 have fallen off. and whether or not these parts 19-1 to 19-n have misaligned postures, etc., and the results of this determination are supplied to the control section 28 and the like.

The control unit 28 converts the component shape data D3 and the chip size data D4 from the dictionary unit 35 into binary data based on the type data of each component 19-1 to 19-n inputted from the surface image information input unit 27. While reading the threshold data D5,
These component shape data D3 and chip size data D
Create windows 31-1 to 31-n based on 4 and
After this, each part 19- inputted from the information input section 27
1 to 19-n and the windows 31-1 to 31-n.
31-n and the binarized threshold data D5 (see FIG. 4), the image input section 22, the image processing section 23, the memory 24, and the determination section 25 The dictionary section 35 is controlled by υ to operate it in teaching mode or inspection mode, and the data obtained in each of these modes,
The processing table 37 and the like are supplied to the image processing section 23, the fixed result output section 26, and the like.

The determination result output unit 26 is configured with a CRT (cathode ray tube display), a printer, etc., and is connected to the control unit 2.
Standard parameters and inspection parameters are supplied from L4 semi-printed circuit board 16-1° inspection printed circuit board 16
When the image data of -2 is supplied or the determination result is supplied, it is displayed or printed out.

Further, the table controller 29 is configured with an interface etc. for connecting the control section 28 and the X-Y table section 10, and transmits data obtained from the X-Y table section 10 to the control section. 28, and controls the XY table section 10 based on the control signal supplied from the control section 28.

Further, the rim controller 30 is configured to include an interface for connecting the control section 28 and the image section 11, and controls the image carrier section based on a control signal supplied from the control section 28. 11.

Next, the operation of this embodiment will be explained separately in teaching mode and inspection mode.

First, in the teaching mode, step ST5 of the flowchart shown in FIG.
board number and position data of each component 19-1 to 19-n mounted on this reference printed circuit board 16-1,
Type data (manufacturer name and model name), processing procedure, etc. are input.

When these data are input, the control section 28 first stores the processing procedure and the like in the memory 24 in step ST7. In step ST8, the control section 28 receives the type data of each of the components 19-1 to 19-1 from the processing section 35, and receives the corresponding component shape data D3, chip size D4, and binarized l31v+ data. [)5, and create windows 31-1 to 31-n from each of these component shape data D3 and each chip size data D4, and in this invasion step ST9, windows 31-1 to 31-n are read out.
A processing table 37 as shown in FIG.
to be memorized. In this case, the controller 28 performs step 5.
At T10, the processing table 37 and the processing procedure are read from the memory 24 and supplied to the image processing section 23.

In this case, each window 31 in the processing table 37
-1 to 31-n are each part 19-1 to 31-n as shown in FIG.
It is made so as to circumscribe 19-n or surround the outside by about 1.5 nn+.

Next, when the reference printed circuit board 16-1 is placed on the table 15 of the X-Y table unit 10, the control unit 28 controls the chuck mechanism 17, each pulse motor 13, 14, and the ring illumination device 21 in step 5T11. , TV camera 20
The TV camera 20 is controlled to assemble the reference printed circuit board 16-1, and the image input section 22 to the determination section 25 are controlled to assemble the reference printed circuit board 16-1 obtained by the TV camera 20. The image signal is converted into image data by the image input section 22, and step 5T12
This conversion result (reference board image data) is sent to the image processing unit 2.
3, and the parameter extraction routine 40 is executed.

In this parameter extraction routine 40, the image processing unit 23
is the position data (Xl, Y2) to (Xn, Yn) of the processing table 37 in step 5T12 shown in FIG. 6(B).
, and each window 31-1 to 31-n is used to cut out each component 19-1 to 19-n portion (component image) from the reference board image data.

Next, in step 5T13, the image processing unit 23 converts each part image into 2111! by using the 2m@button data D5 for each part 19-1 to 19-n. Then, in step 5T14, parameters (reference parameters) are extracted from this 21 conversion result, and these are collectively stored in the memory 24 as a reference parameter file.

In addition, in the inspection mode, the control unit 28 operates as shown in FIG. 6(C).
A sliding door in which each part of the apparatus is placed in an inspection mode by executing step 5T16 of the flowchart shown in , a processing table 37 stored in the memory 24 in step 5T17,
The processing procedure is transferred to the image processing section 23, and the reference parameter file stored in the memory 24 is transferred to the determination section 25.

Next, when the printed circuit board 16-2 to be inspected is placed on the table 15 of the X-Y table section 10, the υ control section 28
In step 5T1B, the jack mechanism 17 is operated to fix the printed circuit board 16-2 to be inspected, and then each pulse motor 13 and 14 are controlled to determine the position and position of the printed circuit board 16-2 in the X-axis direction. In addition to determining the position in the Y-axis direction, the brightness of the ring illumination device 21 and the dancing image line f'1'8 of the TV camera 20 are adjusted.

Next, in step 5T19, the control section 28 causes the TV camera 20 to carry an image of the printed circuit board 16-2 to be inspected, and operates the image input section 22 to display the printed circuit board 16-2 to be inspected obtained by the TV camera 20. Image data (inspection board image data) is created from the image signal of the board 16-2, and this is transferred to the image processing section 23, and the parameter extraction routine 40-2 is executed.

In this parameter extraction routine 40-2, the image processing section 23 operates in the same manner as in the parameter extraction routine 40 described above. In other words, in this case, the image processing unit 23 performs each position data (Xl, Yl) to (Xn
.
Each part image is converted into 2 parts using the binarized values of -1 to 19-n for each part indicated by the digitized IIIta data (1) to (n).
1. Thereafter, the image processing unit 23 processes the binarization results using the processing procedure used during teaching to determine the parameters of each component 19-1 to 1-n (parameters to be inspected).
is extracted and supplied to the control unit 28.

L'l till m 284! ST TS I S T
20 Tecorella 11E Inspection 1i parameters are collected together to create an inspected parameter file, and this is transferred to the determination unit 25, and each of the above-mentioned parts 1.9-1~
19-n, and whether or not the parts of the inspected pudding 1 to the base plate 16-2 have fallen off.
Then, it is determined whether or not these parts have misaligned postures, and in step 5T21, the determination results are supplied to the determination result output section 26 and displayed.

Further, in the above embodiment, the image processing section 23 and the determination section 25 perform image processing and parameter determination processing, but the processing performed by the image processing section 23 and the determination section 25 is performed by the control section 28. It is also possible to do this using a program.

In addition, in the above-mentioned embodiment, one part is
Although we have two windows, even if it is just one part,
If each part has different characteristics, a plurality of windows may be provided for one part, and parameters may be extracted for each window.

Furthermore, in the embodiment described above, the manufacturer data Dl,
Although a parts dictionary 37 including model data D2, part shape data D3, chip size data D4, and binarization threshold data D5 is used, other data, such as reference parameters and processing regarding all parts, is used. A parts dictionary with procedures etc. may be used.

In this way, by simply inputting the position data and type data of the components 19-1 to 19-n to be placed on the reference printed circuit board 16-1 from the information input section 27, the reference printed circuit board 16-1 All relevant data can be entered.

In the above embodiment, the position data of the parts 19-1 to 19-n is input from the information input section 27, but the base board is painted white and the parts are painted black. Each part 19-1 using the teaching board
~19-n position data may be input.

Furthermore, in the embodiment described in -1-, the type data of the parts 19-1 to 19-n is input from the information input section 27, but when creating the reference printed circuit board 16-1, the CAD ( computer aided design)
etc., one part -1 ~ from this CAD etc.
19-0 type data may be obtained.

(Effects of the Invention) As explained above, according to the present invention, it is possible to reduce the number of numerical data input from the keyboard while increasing the inspection viscosity, and also to reduce the number of numerical data input from the keyboard. It is also possible to easily teach data such as threshold values.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an embodiment of a component mounting board inspection device according to the present invention, FIG. 2 is a plan view showing an example of a reference printed circuit board used in this embodiment, and FIG. Schematic diagram showing an example of the parts dictionary used, No. 4
The figure is a schematic diagram showing an example of a part polishing used in this invention, FIG. 5 is a schematic diagram showing an example of a processing table used in this embodiment, and FIG. 6 (A) is a teaching operation of this embodiment. Flowchart X7.1= and FIG. 6(B) showing an example are flowchart
) is a flowchart showing an example of the operation during inspection in this embodiment, FIG. 7 is a block diagram showing an example of a conventional automatic inspection device, and FIG. 8 is an example of a reference printed circuit board that is the inspection standard of this automatic inspection device. The side view shown in FIG. 9 is a flowchart showing an example of the teaching operation of this automatic inspection device. 11... Imaging unit, 12... Processing unit, 16-1...
Reference board (reference printed circuit board), 16-2... Board to be inspected (printed board to be inspected), 18... iJl board, 1
-1 to 19-n... Parts, 25... Judgment section, 28
...control section, 35...dictionary section. Patent applicant Tateishi Electric Co., Ltd. Agent Patent attorney Tetsuji Iwao (1 other person) Figure 3 Figure 4 Figure 5 Figure 6 (B)

Claims (1)

[Claims] In a component mounting board inspection device that processes an image obtained by capturing an image of a board to be inspected on which components are mounted to inspect the components on the board to be inspected, standard data of the components to be mounted on the board to be inspected is A dictionary section that stores each part in advance,
a control unit that reads reference data of the component from the dictionary section according to the position and type of the component mounted on the board to be inspected to create reference board information; and a control unit that takes an image of the reference board information and the board to be inspected. and a determination unit that inspects the components on the board to be inspected based on the information to be inspected obtained by the inspection apparatus.