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| An Extracting Method for Center of Rivet Holes Based on Scattered Point Cloud |
| TIAN Qinglian 1 , XIONG Tianchen 2 , HUANG Xiang 1 , LI Shuanggao 1 , HAO Long 1 |
1. College of Mechanical and Electrical Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China;
2. Jiangxi Aerospace Haihong Test & Control Co., Ltd., Nanchang 330024, China |
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Abstract Aiming at the limitations and the low automations of the current rivet hole feature extraction method, an automatic identification and features parameter extraction method for rivet hole based on scattered point cloud is proposed. The point cloud boundary points are extracted by the k neighbor point distribution of each point, and the point cloud blocks belonging to different boundary features are obtained by using Euclidean distance clustering, and then according to the ellipse fitting result, the rivet hole boundaries are extracted. The k nearest neighbor search algorithm is used to find the point cloud of the rivet hole boundary neighborhood, and then the actual positioning plane of the rivet hole is constructed, and the boundary point is projected to the positioning plane to fit the end circle. The experiments show that the method can accurately identify and extract the rivet holes and that the center position extraction accuracy can reach 0.029mm.
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2022, 
