JPS60253854A - Discrimination of printed circuit board - Google Patents

Abstract

PURPOSE:To make it possible to simply and certainly perform discrimination, by picking up the image of the hole pattern on a printed circuit board to output the image signal to an information processing apparatus and collating said signal with preliminarily stored discrimination information to specify each printed circuit board. CONSTITUTION:The hole pattern for mounting elements of a printed circuit board 2 is irradiated with a light source 3 and the image of said hole pattern is picked up by an image pick-up apparatus 4 while the image signal is outputted to the image information input part 51 of an information processing apparatus 5. Then, the image signal is converted to a digital signal which is, in turn, sent to a memory part 52 to be stored therein and, thereafter, said signal is compared and collated with preliminarily stored discrimination information in a data information judge part 53 and the printed circuit board is specified by a different pattern at every printed circuit board 2. Further, a judge result is displayed on a display apparatus 6 through a display and information output part 54 and outputted to a process control computer (abbreviation in the drawing) from a judge output part 55. By this method, a process from the aspect of process control becomes simple.

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention automatically identifies the name (model number, code, recognition symbol, etc.) of a printed circuit board without providing any special identification hole code, characters, bar code, etc. The present invention relates to a printed circuit board identification method that can identify printed circuit boards.

Technical Background of the Invention] When manufacturing a printed circuit board, a name is recorded at a predetermined position on the printed circuit board, and this name is used to perform various process controls.

The name can be recorded by placing a hole code for identification near the corner of the printed circuit board, by printing a bar code or characters for identification on the printed circuit board, or by using a label with a bar code or characters printed on it. The printed circuit board is identified by reading these names with a hole code reader, bar code reader, or OCR.

[Problems with the Background Art] As mentioned above, in the past, hole codes, characters, bar codes, etc. for identification were punched, printed, or affixed to printed circuit boards; This has the disadvantage of complicating the process.

[Objective of the Invention] The present invention has been made in order to eliminate the above-mentioned drawbacks in the background art, and provides a method for reliably identifying the name of a printed circuit board without using a hole code, characters, bar code, etc. for identification. The purpose of the present invention is to provide a method for identifying printed circuit boards that can be obtained.

[Summary of the Invention] The printed circuit board identification method of the present invention detects a hole pattern of a printed circuit board being transported by an imaging device, inputs this detected pattern as image information to an information processing device, and in this information processing device, The method is characterized in that each printed circuit board is identified by comparing and collating the photographed hole pattern of the printed circuit board with the hole pattern of each printed circuit board stored in advance.

[Embodiments of the invention] Hereinafter, the present invention will be described in detail with reference to the drawings.

In FIG. 1, a printed circuit board 2 being conveyed on a conveyor 1 is illuminated by a light source 3 disposed below the conveyor 1, and an imaging device 4 such as an ITV camera disposed above it is used for mounting elements on the printed circuit board 2. The hole pattern is photographed.

FIG. 2 shows an example of a pattern for mounting ICs, LSIs, etc. drilled in the printed circuit board 2. This hole pattern 21 for mounting elements usually differs depending on the type of printed circuit board 2, and The printed circuit board 2 can be identified by the pattern of the mounting balls.

The image signal of the element mounting pattern photographed by the imaging device is output to the information processing device 5.

As illustrated in FIG. 3, the information processing device 5 includes an image information input section 51, a storage section 52, a data processing judgment section 53, a display information output section 54, and a judgment result output section 55. The image signal of the element mounting pattern input to the input section 51 is converted into a digital signal and stored in the storage section 52.

The stored information in the storage section 52 is led to the data processing judgment section 53, where it is compared and verified with the identification information stored in advance.
The name of the printed circuit board 2 is determined. This determination result is displayed on the display device 6 of FIG. 1 through the display information output section 54, and is also outputted through the determination result output section 55 to a process control computer (not shown) or the like.

The imaging device 4, the information processing device 5, and the display device 6 are mounted on a portable rack 8 that is movable by casters 7.

In the above explanation, the light source 3 is placed below the conveyor 1,
An example has been described in which the light transmitted through the element mounting hole 21 is caught by the image carrier M4 disposed above the conveyor 1, and the pattern thereof is identified.

In this case, the conveyor 1 that conveys the printed circuit board 2 needs to be configured or made of a material that allows the light from the light source 3 to pass through, but if this is difficult, the light source 3 is placed on the imaging device 4 side, The reflected light from the element mounting hole 21 may be input as an image signal.

As mentioned above, the present invention skillfully utilizes the fact that the hole patterns for mounting elements drilled on printed circuit boards are different depending on the type of printed circuit board, and analyzes the hole patterns for mounting elements using an information processing method. Since the identification information is compared with pre-stored identification information, in order to identify the printed circuit board, special hole codes, characters, bar codes, etc. are punched, printed, or pasted on the printed circuit board. This is not necessary and can avoid complicating the process.

[Effects of the Invention] As described above, since the present invention identifies printed circuit boards using hole patterns for mounting elements, it is possible to perform hole codes, letters, bar codes, etc. by drilling, printing, pasting, etc. Labeling work can be omitted, and complication of process control can be avoided, contributing to cost reduction.

[Brief explanation of drawings]

Fig. 1 is a perspective view showing an embodiment of the present invention, Fig. 2 is a plan view illustrating a hole pattern for mounting elements on a printed circuit board, and Fig. 3 is an embodiment of an information processing device used in the present invention. It is a block diagram (not shown). 1... Conveyor 2... Printed circuit board 3...
...... Light source 4 ...... Image carrier 5 ...... Information processing device 6 ...
・・・・・・Display device 7・・・・・・・・・Casters 8・・・・・・
... Rack 51 ... Image information input section 52 ...
...... Storage section 53 ...... Data processing judgment section 54.
......Display information output section 55...
・・・・・・Judgment result output part Fig. 1

Claims (3)

[Claims] (1) The hole pattern of the printed circuit board being conveyed is detected by an imaging device, this detected pattern is input as image information to the information processing device, and the information processing device stores the hole pattern of the photographed printed circuit board in advance. A printed circuit board identification method characterized by identifying each printed circuit board by comparing and collating hole patterns of each printed circuit board. (2) Comparison and verification in the information processing device converts the image signal input from the imaging device into a digital signal in the image information input unit, stores it in the storage unit, guides it to the data processing judgment unit, and stores it in advance. 2. The printed circuit board identification method according to claim 1, wherein the printed circuit board identification method is carried out by comparing and collating pattern information. (3) The printed circuit board identification method according to claim 1 or 2, wherein the identification result is displayed on a display device.