3D Reconstruction of Power Steel Poles'Flange Rib Welding Seam by Light Section Method
Aiming at the problem of weld guide in automatic welding of electric steel tube towers'flange rib,a method of 3d re-construction and measurement of rib weld based on light section method was proposed.Constructed the platform of camera and linear laser,and the measurement model was demarcated by using the Zhang Zhengyou's method,established a corresponding relationship between the optical plane's space coordinates and the camera's image coordinates.Used the linear structured light to scan the experiment,solved the corresponding points'space coordinates by measuring model,reconstructed the 3D point cloud based on the Visual Studio,Random Sample Consensus(RANSAC)iteration method was adopted to realize segmentation of point cloud,used the point cloud algorithm which is based on normal and k neighborhoods′search to extract the edge,used the max angle of the tie-line between sampling points and k neighbors'project points as the principle to enhance the cloud boundaries'identification accuracy,then designed point cloud screening principle based on statistical filtering to achieve the goal of weld cloud points'segmentation.The experimental results show that the relative error of the model after calibration of the tangent plane is≤1.46%,the maximum absolute error of the weld length after fitting is 0.97mm,and the relative error is≤1.29%.This method can extract two target welds at the same time,has the high efficiency and low cost characteristics.
Steel Poles for PowerRib WeldLight Section MethodThree-Dimensional ReconstructionWeld Extraction
NETL
NSTL
万方数据
维普
