Weld appearance shape based on line laser scanning and surface defect detection method
A technology for defect detection and weld appearance, applied in the direction of optical defect/defect test, measuring device, optical device, etc., can solve the problems of laser recognition difficulty, affecting detection accuracy, interference of normal defect detection, etc., to achieve accurate detection, High-quality weld production and the effect of improving detection efficiency
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[0067] Example 1.
[0068] For ease of description, in this embodiment, the longitudinal direction of the welding seam is set as the Z-axis direction, the cross-sectional direction is the X-axis direction, and the height is set as the Y-axis direction.
[0069] A line laser generator is located in the Y-axis direction of the weld, which can generate a beam of line laser in the X-axis direction, project and focus on the surface of the weld, and scan the cross-section of the weld in the X-axis direction.
[0070] A photodetector images the line laser on the surface of the weld from another angle. Due to the different heights of the line laser irradiation on the surface of the weld, the angle of the scattered or reflected laser light received by the photodetector is also different. For any laser point of the line laser, the photodetector will obtain the position of the spot image, which can be calculated. The position height of the laser irradiation point on the surface of the w...
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