Visual defect detection system and method
A defect detection and visual technology, applied in the field of defect detection, can solve the problems of mechanical mechanism taking a certain amount of time, unfavorable parts defect detection, complex mechanical structure design, etc., to improve the success rate and efficiency, good detection reliability, convenient Integrated and extended effects
Inactive Publication Date: 2020-12-04
TONGJI UNIV
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Problems solved by technology
However, for parts with complex shapes in industrial production, the defects may appear on different surfaces
Using a single camera combined with a mechanical structure to flip the object can obtain images of different sides of the object, but the design of the mechanical structure of this method is relatively complicated, and the object will shake while flipping the object, resulting in distortion of the captured image. Execution takes a certain amount of time, which is not conducive to real-time online component defect detection on automatic production lines
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[0040] Such as figure 1 As shown, this application proposes a visual defect detection system, including a multi-plane mirror reflection system and a vision system.
[0041] The multi-plane mirror reflection system is used to change the optical path of the reflected light on the surface of the object 1 to be detected, and includes two plane mirrors 7 arranged symmetrically in the center, and the object 1 to be tested is fixed in the middle of the two plane mirrors 7 by a clamp. The plane mirror 7 is placed obliquely, which can change the optical path of the light reflected from the side of the object 1 to be detected, so that the plane mirror 7 can perform reflection imaging on the side of the object 1 to be detected, and the two plane mirrors 7 working at the same time can obtain the reflection of the two main sides of the object 1 to be detected. The image meets the requirement that one camera collects images from multiple perspectives of the object 1 to be detected.
[0042...
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The invention relates to a visual defect detection system and method. The visual defect detection system comprises a multi-plane mirror reflection system and a visual system, wherein the multi-plane mirror reflection system is used for changing a light path of light reflected by the surface of a to-be-detected object and comprises two plane mirrors which are arranged in a central symmetry manner,and the to-be-detected object is fixed between the two plane mirrors; and the visual system is used for collecting images of the to-be-detected object and comprises a camera system and a light sourcesystem, the camera system comprises a plurality of cameras with adjustable poses, and the light source system comprises a light source. Compared with the prior art, the visual defect detection methodadopting the plane mirrors is provided, the visual system and the optical system based on the plane mirrors are combined for object defect detection, multiple surfaces of the to-be-detected object canbe comprehensively detected at the same time, the detection reliability is good, and the detection efficiency is high.
Description
technical field [0001] The present invention relates to the technical field of defect detection, in particular to a visual defect detection system and method. Background technique [0002] With the continuous development of computer technology, computer vision is gradually integrated into people's daily life and industrial production. Computer vision is the process of using computers to simulate human vision. This technology combines image processing, artificial intelligence and pattern recognition technologies, which can replace traditional manual inspection and realize automatic inspection of parts on the production line. [0003] In the prior art, the "defect detection method and its device" (application number: CN201410756951.1) uses a light source to irradiate the area to be tested of the workpiece to be tested to obtain a reflected image of the area to be tested, and the brightness of the reflected image is used as the main criterion. Determine whether the workpiece i...
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IPC IPC(8): G01N21/95G06K9/62
CPCG01N21/8806G01N21/8851G01N21/9515G01N2021/8887G06F18/214
Inventor 李安虎赵祖生
Owner TONGJI UNIV