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Image mosaic technology-based PCB working sheet AOI (Automatic Optic Inspection) method

A technology of image splicing and detection methods, applied in image enhancement, image data processing, graphics and image conversion, etc., can solve the problems of high cost and large size of PCB work piece, and achieve the effect of increasing equipment cost

Inactive Publication Date: 2015-12-02
苏州威盛视信息科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0003] At present, due to its large size, large-scale typesetting PCB work pieces need to be inspected by large-scale AOI equipment, and the cost of this equipment is relatively high.

Method used

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Examples

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Embodiment Construction

[0019] Below in conjunction with the examples, the specific implementation of the present invention will be further described in detail. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0020] A sort of based on image AOI detection method of PCB work pieces based on splicing technology , follow the steps below:

[0021] 1. There is a camera above the workbench of the AOI equipment. The camera is installed on the XY plane moving guide rail. The PCB work piece is placed in the detection area of ​​the workbench. The work piece is divided into multiple shooting areas arranged in a matrix (according to Set 4-9 working pieces according to different sizes, generally 6 pieces are better), the XY plane moving guide rail drives the camera to reach the center of each shooting area in sequence from front to back and from left to right for positioning Static shooting, the exposure of the camera is ...

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Abstract

The invention relates to an image mosaic technology-based PCB working sheet AOI (Automatic Optic Inspection) method. A camera is arranged on a working table of an AOI device and is arranged on an XY plane moving guide rail; PCB working sheets are placed on an inspection area of the working table and are divided into a plurality of shooting areas arranged in a matrix shape; the XY plane moving guide rail drives the camera to reach positions above the centers of the shooting areas in sequence from front to back and from left to right for performing positioning static-state shooting; shot images are stored in an inner memory in the AOI device; and an image processing unit can run in an inner processing unit in the AOI device and can be used for extracting the images in the inner memory and splicing all the images to obtain a complete image by adopting an image mosaic method. According to the method, the AOI on large PCB working sheets can be realized on the premise of not greatly increasing the cost of the devices.

Description

technical field [0001] The invention relates to the technical field of AOI detection of printed circuit boards, in particular to a method capable of realizing AOI detection of large-scale PCB work pieces. Background technique [0002] The full name of AOI (Automatic Optic Inspection) is automatic optical inspection, which is a device based on optical principles to detect common defects encountered in welding production. AOI is a new type of testing technology emerging, but it is developing rapidly, and many manufacturers have launched AOI testing equipment. During automatic detection, the machine automatically scans the PCB through the camera, collects images, compares the tested solder joints with the qualified parameters in the database, and after image processing, checks out the defects on the PCB, and displays / labels the defects through the display or automatic signs out for repair by the maintenance crew. [0003] At present, due to its large size, large-scale typeset...

Claims

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Application Information

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IPC IPC(8): G01N21/88G06T5/50G06T3/40
Inventor 张智海易永祥
Owner 苏州威盛视信息科技有限公司
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