19 October 2016 Fixtureless nonrigid part inspection using depth cameras
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Proceedings Volume 10155, Optical Measurement Technology and Instrumentation; 101553T (2016) https://doi.org/10.1117/12.2247537
Event: International Symposium on Optoelectronic Technology and Application 2016, 2016, Beijing, China
Abstract
In automobile industry, flexible thin shell parts are used to cover car body. Such parts could have a different shape in a free state than the design model due to dimensional variation, gravity loads and residual strains. Special inspection fixtures are generally indispensable for geometric inspection. Recently, some researchers have proposed fixtureless nonridged inspect methods using intrinsic geometry or virtual spring-mass system, based on some assumptions about deformation between Free State shape and nominal CAD shape. In this paper, we propose a new fixtureless method to inspect flexible parts with a depth camera, which is efficient and low computational complexity. Unlike traditional method, we gather two point cloud set of the manufactured part in two different states, and make correspondences between them and one of them to the CAD model. The manufacturing defects can be derived from the correspondences. Finite element method (FEM) disappears in our method. Experimental evaluation of the proposed method is presented.
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Hanwei Xiong, Hanwei Xiong, Jun Xu, Jun Xu, Chenxi Xu, Chenxi Xu, Ming Pan, Ming Pan, } "Fixtureless nonrigid part inspection using depth cameras", Proc. SPIE 10155, Optical Measurement Technology and Instrumentation, 101553T (19 October 2016); doi: 10.1117/12.2247537; https://doi.org/10.1117/12.2247537
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