Defect detection method for high-brightness and high-reflectivity part

Abstract

The invention relates to the field of product detection, and discloses a high-brightness and high-reflectivity part defect detection method which comprises the following steps: preparing a projector, an industrial camera and an arc-shaped semitransparent plate; controlling the projector to project a stripe image to the arc-shaped semitransparent plate, enabling the measured part located at the arc center position of the arc-shaped semitransparent plate to reflect the stripe image displayed on the arc-shaped semitransparent plate, and enabling the industrial camera to collect the image reflected by the measured part; repeating the above steps to obtain images of multiple groups of different stripe images reflected on the measured part; synthesizing all the images, and synthesizing a result image with depth information; identifying the gray-scale value of the result image, and judging whether places with different gray-scale values exist on the result image or not, so as to judge whether the detected part has defects or not, and identifying the places with different gray-scale values. By means of the mode, flaws on the surfaces of the parts can be rapidly, accurately and stably detected.

Description

technical field [0001] The invention relates to the field of product detection, in particular to a method for detecting defects of high-brightness and high-reflection parts. Background technique [0002] The defect detection of parts has always been a difficult problem in the field of product inspection, especially for parts with high brightness and high reflection. These parts are widely distributed in various industrial products, such as important parts of automobiles, 3C, general consumer goods, aircraft and so on. In addition to appearance requirements, the purpose of testing is mostly functional requirements, and the defects of parts will directly affect the function and life of the product. [0003] For parts with high brightness and high reflection, the existing inspection methods mainly rely on manual naked eye inspection, which not only has low efficiency, poor accuracy and consistency, but also damages the visual health of inspectors. [0004] Another detection m...

AI Technical Summary

Problems solved by technology

[0003] For parts with high brightness and high reflection, the existing detection methods mainly rely on manual naked eye detection, which not only has low efficiency, poor accuracy and consistency, but also damages the visual health of inspectors

[0004] Another detection method is to use a 2D camera to shoot directly, but this detection method can only be used for shooting and recognition of parts that are close to the plane and have stable gloss. It is a part with a complex shape, and the 2D camera will have a fixed angle and cannot cover all areas of the part.

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