To address the problem that the point cloud on the bottom surface of the measured object cannot be acquired efficiently in 3D laser inspection,a supplementary perspective 3D point cloud scanning method based on the principle of right-angle prism refraction is proposed in this paper.The method adopts a right-angle prism to refract the bottom view image to the side,compensating for the lack of a bottom detection viewpoint for 3D detection and complements the bottom detection viewpoint.The sealing ring is taken as the defect detection object,and a structured light 3D cam-era is employed to collect the 3D point cloud.Compared with the direct scanning methods,this approach allows for re-al-time and rapid identification of surface defects with intact sealing rings in a single operation.It particularly simpli-fies the detection of bottom defects,eliminating the need for specialized gripping devices or complex mechanical struc-tures such as robotic arms,and only the addition of a right-angle prism is required.Experimental results demonstrate that the point cloud scanning method with the supplementary perspective using a right-angle prism can meet the ima-ging requirements and effectively detect common defects such as fracture and collapse in sealing rings,achieving a de-tection accuracy of 100％and fulfilling the requirements of sealing rubber ring defect detection.
关键词
三维检测/直角三棱镜/补充视角/折射/反射/缺陷检测
Key words
3D inspection/right-angle prism/supplementary perspective/refraction/reflection/defect detection
维普
万方数据