A Visual Inspection System for Workpiece Appearance Defects Based on Image Processing

A technology of image processing and defect detection, which is applied in the field of visual inspection system, can solve the problems of high false detection of the system, poor detection of small scratches, indentations and blistering defects, etc.

CN106053479BActive Publication Date: 2018-09-11XIANGTAN UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2018-09-11

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Abstract

The invention discloses a visual inspection system for workpiece appearance defects based on image processing, which includes an industrial computer, a coaxial light source, a CCD industrial camera, an image acquisition card and a rejection mechanism; the coaxial light source and the rejection mechanism are both connected to the industrial computer; the CCD The industrial camera is connected to the industrial computer through an image acquisition card; among them: the coaxial light source is used to provide diffuse reflection light source for the workpiece to be inspected; the CCD industrial camera is used to take images of the workpiece at the inspection station; the rejection mechanism is used to remove the workpiece from the production line Workpieces with defects through inspection are eliminated; the industrial computer has a defect detection module based on image processing; the system has high detection efficiency and is easy to implement.
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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 ...

Examples

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 inspected; the CCD industrial camera is used to capture the image of the workpiece at the inspection station; the reject mechanism is used to remove the defective workpiece from the production line after passing the inspection;

[0107] The industrial computer has a defect detection module based on image processing;