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Proceedings Paper

3-D measuring of engine camshaft based on machine vision
Author(s): Jianxin Qiu; Liang Tan; Xiaodong Xu
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Paper Abstract

The non-touch 3D measuring based on machine vision is introduced into camshaft precise measuring. Currently, because CCD 3-dimensional measuring can't meet requirements for camshaft's measuring precision, it's necessary to improve its measuring precision. In this paper, we put forward a method to improve the measuring method. A Multi-Character Match method based on the Polygonal Non-regular model is advanced with the theory of Corner Extraction and Corner Matching .This method has solved the problem of the matching difficulty and a low precision. In the measuring process, the use of the Coded marked Point method and Self-Character Match method can bring on this problem. The 3D measuring experiment on camshaft, which based on the Multi-Character Match method of the Polygonal Non-regular model, proves that the normal average measuring precision is increased to a new level less than 0.04mm in the point-clouds photo merge. This measuring method can effectively increase the 3D measuring precision of the binocular CCD.

Paper Details

Date Published: 3 February 2009
PDF: 9 pages
Proc. SPIE 7160, 2008 International Conference on Optical Instruments and Technology: Optoelectronic Measurement Technology and Applications, 71601Z (3 February 2009); doi: 10.1117/12.806895
Show Author Affiliations
Jianxin Qiu, Shanghai Univ. of Engineering Science (China)
Liang Tan, Shanghai Univ. of Engineering Science (China)
Shanghai Jiao tong Univ. (China)
Xiaodong Xu, Shanghai Univ. of Engineering Science (China)
Shanghai Jiao tong Univ. (China)


Published in SPIE Proceedings Vol. 7160:
2008 International Conference on Optical Instruments and Technology: Optoelectronic Measurement Technology and Applications

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