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Proceedings Paper

Fixtureless nonrigid part inspection using depth cameras
Author(s): Hanwei Xiong; Jun Xu; Chenxi Xu; Ming Pan
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Paper 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.

Paper Details

Date Published: 19 October 2016
PDF: 6 pages
Proc. SPIE 10155, Optical Measurement Technology and Instrumentation, 101553T (19 October 2016); doi: 10.1117/12.2247537
Show Author Affiliations
Hanwei Xiong, Guangdong Univ. of Technology (China)
Jun Xu, Guangdong Univ. of Technology (China)
Chenxi Xu, Guangdong Univ. of Technology (China)
Ming Pan, Guangdong Univ. of Technology (China)

Published in SPIE Proceedings Vol. 10155:
Optical Measurement Technology and Instrumentation
Sen Han; JiuBin Tan, Editor(s)

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