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Hole plugging defect detection method and hole plugging defect detection equipment based on image detection

A defect detection and image detection technology, applied in optical testing flaws/defects, measuring devices, material analysis by optical means, etc., can solve problems such as inability to detect recessed depth 3D shape, and achieve the effect of accurate defect detection results

Active Publication Date: 2021-03-05
深圳宜美智科技股份有限公司
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Problems solved by technology

[0006] The present invention provides a plug hole defect detection method and plug hole defect detection equipment based on image detection, which can realize effective detection of resin depression defects of PCB boards; to solve the existing plug hole defect detection method and plug hole defect detection equipment The technical problem of being unable to detect the depth of the resin depression and the three-dimensional shape of the depression

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  • Hole plugging defect detection method and hole plugging defect detection equipment based on image detection
  • Hole plugging defect detection method and hole plugging defect detection equipment based on image detection
  • Hole plugging defect detection method and hole plugging defect detection equipment based on image detection

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Embodiment Construction

[0064] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative efforts shall fall within the protection scope of the present invention.

[0065] The sequential words such as "first", "second" and "third" in the terms of the present invention are only for the purpose of description, and should not be construed as indicating or implying relative importance, nor as a limitation on the sequence;

[0066] In addition, words such as “connected” and “arranged” in the terms of the present invention should be understood in a broad sense, which may mean that one component is directly connec...

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Abstract

The invention provides a hole plugging defect detection method based on image detection. The method comprises the steps that a camera acquires a first orthographic projection image under the irradiation of a first side light source; under the irradiation of a second side light source, the camera acquires a second orthographic projection image; based on a first shadow part and a second shadow part,a recessed area of a hole plugging recess is calculated; the hole plugging depth of the hole plugging recess is calculated according to the recess area of the hole plugging recess, the first shadow part and the incident angle of the first side light source; and if the hole plugging depth is greater than a preset value, it is determined that PCB has a resin hole plugging defect. The invention further provides hole plugging defect detection equipment. According to the invention, through the arrangement of the first side light source and the second side light source, the first shadow part and the second shadow part related to the hole plugging recess can be obtained, and then the hole plugging depth and the hole plugging shape of the hole plugging recess can be calculated through the first shadow part and the second shadow part.

Description

technical field [0001] The invention relates to the field of image detection, in particular to a plug hole defect detection method and plug hole defect detection device based on image detection. Background technique [0002] With the development of electronic technology, especially the in-depth development of 5G technology, the frequency of data transmission is getting higher and higher, and more and more new processes have been introduced in the production of circuit boards. an important process. [0003] During the filling process of the PCB resin plug hole, bubbles will be generated inside the resin, and some depressions on the resin surface will be generated after the leveling treatment, and these depressions will affect the performance of the PCB board. [0004] However, the existing defect detection equipment can only detect the two-dimensional shape of the depression on the surface of the PCB board, and cannot detect the depth of the depression and the three-dimensio...

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Application Information

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IPC IPC(8): G01N21/01G01N21/95
CPCG01N21/01G01N21/95
Inventor 陈胜鹏
Owner 深圳宜美智科技股份有限公司
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