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FPC gold finger surface defect detection system and method based on AOI technology

A defect detection and gold finger technology, which is applied in the field of FPC gold finger surface defect detection system, can solve the problem of high size specification and achieve the effect of improving detection efficiency and reducing detection cost

Inactive Publication Date: 2019-05-07
DONGGUAN UNIV OF TECH
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  • Description
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Problems solved by technology

[0006] The traditional template matching method has high requirements on product technology and high dimensional specifications. The feature-based image extraction method overcomes this problem very well.

Method used

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  • FPC gold finger surface defect detection system and method based on AOI technology
  • FPC gold finger surface defect detection system and method based on AOI technology

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Embodiment Construction

[0043] The present invention is described in detail below with reference to accompanying drawing and embodiment:

[0044] attached Figure 1-2 It can be seen that an FPC gold finger surface defect detection system based on AOI technology includes an X-Y-Z multi-axis motion platform and a camera. The X-Y-Z multi-axis motion platform includes a motor, a motor driver, a sliding module and a motion control card. The card performs movement control and positioning on the X-Y-Z multi-axis motion platform, the X-axis performs front-to-back movement control on the product platform to be inspected, and the Y-axis and Z-axis are responsible for the left-right and up-down movement control of the camera; the X-axis and Y-axis realize horizontal Direction movement, FPC surface detection, Z axis to realize the focal length adjustment of the camera; the camera performs digital image acquisition, and the camera is connected to the central processing unit through the RJ45 interface;

[0045] ...

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Abstract

The invention relates to an FPC gold finger surface defect detection system and method based on an AOI technology. The system comprises an X-Y-Z multi-axis motion platform and a camera. A central processor carries out motion control and positioning on the platform through a motion control card. The camera carries out digital image acquisition. The central processor carries out preprocessing on theacquired image data. RIO region processing is carried out on a preprocessed image. Feature extraction is carried out on the image data, and image recognition is carried out. According to the FPC goldfinger surface defect detection system and method based on the AOI technology, which are provided by the invention, through an multi-axis operation control device and an image acquisition device, theautomatic optical inspection technology (AOI) is adopted to acquire the surface state of FPC by optical means; based on empirical mode analysis (EMD) and an HU invariant moment feature fusion method,feature extraction is carried out; the classification problems of small sample deficiency and difficult defect identifying are effectively solved; the detection efficiency is improved; and the detection cost is reduced.

Description

technical field [0001] The invention relates to a machine vision appearance inspection system, in particular to an AOI technology-based FPC gold finger surface defect inspection system and method. Background technique [0002] Highly reliable flexible printed circuit board (Flexible Printed Circuit), referred to as FPC or soft board. Compared with rigid printed circuits, flexible printed circuits have the advantages of light weight, bendability, winding, three-dimensional wiring, and less space, and have more and more extensive application space. [0003] my country is a big manufacturing country. Electronic terminal products are developing in the direction of small, light, thin and smart. The FPC industry has been developing rapidly. At the same time, higher requirements are put forward for the density of FPC lines. The existence of tiny defects can make the entire product scrapped. In order to ensure the quality of the product, it is necessary to conduct a full inspection ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/95G01N21/01
Inventor 林盛鑫刘华珠赵晓芳陈德铮
Owner DONGGUAN UNIV OF TECH
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