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Proceedings Paper

Study on inner hole testing of nozzle with small size and complex contour
Author(s): Liang Zhang; Jun-hong Su; Li-hong Yang; Jun-qi Xu
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Paper Abstract

Testing of small size and complex contour of Nozzle, an important component affecting the engine performance, is very difficult, particularly for the inner hole. Due to difficulty in holding, it is easy to scrap the surface of the inner hole by the traditional contact-type detection methods. In this paper testing method of the hole is researched in details with image stitching technology. In the testing, a serial of focused images in different depths of inner hole of nozzle are collected by CCD camera, and compared by image focusing evaluation function, thus depth information in various locations of the inner hole images is obtained. A full depth image, the panorama of the inner hole, is rebuilt by multi-focus image fusion algorithm, for the image pixels corresponding to the focus altitudes are segmented. To achieve 3D reconstruction of the inner hole, the depth information by linear interpolation is fitted to restore a precise inner hole depth information. The results show that the inner hole of nozzle can be tested precisely with high precision which can meet the design requirements, and the entire contour can be reconstructed by the testing method.

Paper Details

Date Published: 12 October 2010
PDF: 7 pages
Proc. SPIE 7656, 5th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test and Measurement Technology and Equipment, 76564N (12 October 2010); doi: 10.1117/12.865535
Show Author Affiliations
Liang Zhang, Xi'an Technological Univ. (China)
Jun-hong Su, Xi'an Technological Univ. (China)
Li-hong Yang, Xi'an Technological Univ. (China)
Jun-qi Xu, Xi'an Technological Univ. (China)


Published in SPIE Proceedings Vol. 7656:
5th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test and Measurement Technology and Equipment
Yudong Zhang; Jose M. Sasian; Libin Xiang; Sandy To, Editor(s)

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