Rapid detection method and system for multiple defects on surface of aluminum valve plate, medium and terminal

Abstract

The invention discloses a rapid detection method and system for multiple defects on the surface of an aluminum valve plate, a medium and a terminal, and relates to the technical field of visual optical design. Aiming at a to-be-detected position on the surface of the aluminum valve plate, the camera and the light sources are controlled by the manipulator to reach a specified position, the same position on the surface of the aluminum valve plate is sequentially irradiated by the eight light sources at four angles of the same plane, and the camera sequentially photographs along with the irradiation of the different light sources to obtain images of the light sources at the corresponding angles; real-time integration processing is performed on the image corresponding to each light source angle, namely the image is calculated by using a photometric stereoscopic vision theory to obtain a corresponding illumination reflectivity image and a Gaussian convolution graph of the image; and a preprocessing area of the image is obtained through the albedo image and the Gaussian convolution image, polar coordinate conversion is carried out on the preprocessing area, and filtering processing is carried out after polar coordinate conversion. The problems that some qualified and slight scratches are not obviously compared with unqualified scratches on the image, and unqualified products cannot be recognized are solved.

Description

technical field [0001] The disclosure of the present invention relates to the technical field of visual optical design, in particular to a method, system, medium and terminal for rapid detection of various defects on the surface of an aluminum valve plate. Background technique [0002] The surface groove of the aluminum valve plate is not smooth, and whether the valve plate is qualified requires various inspections, such as scratches, peeling, bumps, air holes and foreign objects. At present, the detection is generally carried out manually, the detection efficiency is low, and the detection is not accurate enough. The total length of the metal block is about 220mm, the scanning length of the test bench is 250mm, the scanning speed is 50mm / s, and the time is 5s. From the 3D scanning diagram, it is large. The depth of some grooves can be measured, but the bottom surface of some grooves cannot be completely scanned, and there are partial scanning blind areas, which make it impo...

AI Technical Summary

Problems solved by technology

[0005] 1. In the long-term single repetitive work, workers are prone to fatigue, resulting in unqualified products flowing into the application market;

[0006] 2. Manually detect possible missing inspections based on experience, and there will be corresponding differences in the judgment of the qualification of limit parts;

[0007] 3. The surface of the aluminum valve plate is uneven and has many grooves on the surface, which is difficult to meet

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