基于多线结构光扫描点云的导管弯曲褶皱度测量方法

Abstract

Objective Aviation tubes have been widely used in various systems of aerospace equipment owing to their excellent physical and chemical properties. It is important to ensure the manufacturing quality of aviation tubes for the safety of aircraft. Aviation tubes are manufactured by bending straight tubes. Under the action of the bending moment, the inner side of the tube is wrinkled and deformed owing to compressive instability. Although numerous researchers have investigated various manufacturing methods in the past few decades, wrinkle deformation is still unavoidable. The wrinkle degree of the tube is a key indicator of tube deformation, with the key geometric parameter being the wrinkle depth. Conventional manual inspection methods cannot guarantee the measurement efficiency and reliability of measurement results. Using a digital 3D measurement method can effectively avoid these shortcomings. Such methods quickly capture the surface shape data of the target object and have been widely used in welding seam detection and contour deformation detection.