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System for visually detecting workpiece appearance defects based on image processing

A technology for image processing and appearance defects, applied in the field of visual inspection systems, can solve the problems of poor detection of small scratches, indentations and blister defects, and high system false detection.

Active Publication Date: 2016-10-26
XIANGTAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] At present, the main methods of visual detection of workpiece appearance defects: (1) The automatic detection of metal workpiece surface defects is realized through genetic algorithm and visual image processing morphology. The bubble defect detection effect is poor; (2) the existence of product defects is judged by using the image grayscale feature and the abnormal change of the grayscale value, but due to the strong reflective characteristics of the metal surface, the system has a high false detection rate

Method used

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  • System for visually detecting workpiece appearance defects based on image processing
  • System for visually detecting workpiece appearance defects based on image processing
  • System for visually detecting workpiece appearance defects based on image processing

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Embodiment 1

[0103] Such as Figure 1-3 , a visual inspection system for workpiece appearance defects based on image processing, characterized in that it includes an industrial computer, a coaxial light source, a CCD industrial camera, an image acquisition card and a rejecting mechanism;

[0104] Both the coaxial light source and the rejecting mechanism are connected with the industrial computer;

[0105] The CCD industrial camera is connected to the industrial computer through the image acquisition card;

[0106] Among them: the coaxial light source is used to provide diffuse reflection light source for the workpiece to be detected; the CCD industrial camera is used to photograph the

[0107] The image of the workpiece; the removal mechanism is used to remove the defective workpiece from the production line;

[0108] The industrial computer has a defect detection module based on image processing;

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Abstract

The invention discloses a system for visually detecting workpiece appearance defects based on image processing, comprising an industrial personal computer, a coaxial light source, a CCD (charge coupled device) industrial camera, an image acquisition card and a rejecting mechanism; both the coaxial light source and the rejecting mechanism are connected with the industrial personal computer; the CCD industrial camera is connected with the industrial personal computer through the image acquisition card; wherein the coaxial light source is used for providing a diffuse reflection light source for a workpiece to be detected; the CCD industrial camera is used for taking an image of the workpiece at a detection station; the rejecting mechanism is used for rejecting from a production line, workpieces detected to be defective; the industrial personal computer has a defect detection module based on image processing; the system is high in detection efficiency and easy to implement.

Description

technical field [0001] The invention belongs to the field of automatic detection, in particular to a visual detection system for workpiece appearance defects based on image processing. Background technique [0002] The main production process of metal workpieces is machining, stamping, precision casting, powder metallurgy, metal injection molding, dimensional inspection, appearance defect inspection, etc. Affected by the manufacturing process throughout the production process, the size and appearance of the workpiece will be unqualified to a certain extent. Among them, appearance defects mainly include: gaps, sticky materials, cracks, indentations, pinholes, scratches and blisters, etc. If workpieces with appearance quality defects flow into the next production process, the assembly will be blocked and deformed, which will affect the quality of the assembled parts. potential economic losses and reputational risks. [0003] Traditional appearance defect inspection methods ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/88B07C5/34G06T3/00G06T3/60G06T5/20G06T7/00
CPCG06T3/608G06T5/20G06T7/0004G01N21/8851B07C5/34G01N2021/8887G01N2021/888G06T2207/30164G06T3/02
Inventor 许海霞王伟周维朱江莫言印峰王仕果周帮王倪东
Owner XIANGTAN UNIV
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