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Proceedings Paper

High-precision method for measuring large diameter on-line
Author(s): Qiancheng Zhao; Xiaoli Luo; Changyou Lu; Yingfu Guo
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Paper Abstract

An apparatus, mainly being made up of 3 displacement sensors, for measuring large diameter from Chord Length and Bow Altitude is designed, and the diameter measuring uncertainty is discussed in detail. The chord length, being calibrated with two standard circles, is selected matching with the dimension of measured large diameter. A series of techniques, including of sensors being set symmetrically, relative measuring method, and averaging the measuring results, are presented, so that the structure of measurement apparatus, the processes of calibration and measuring are to be simplified, with the measuring precision being improved. The results show the uncertainty of estimated values of diameter is about 3 μm, when some conditions are restricted.

Paper Details

Date Published: 31 December 2008
PDF: 6 pages
Proc. SPIE 7130, Fourth International Symposium on Precision Mechanical Measurements, 71305G (31 December 2008); doi: 10.1117/12.819756
Show Author Affiliations
Qiancheng Zhao, Hunan Univ. of Science and Technology (China)
Xiaoli Luo, Hunan Univ. of Science and Technology (China)
Changyou Lu, Hunan Univ. of Science and Technology (China)
Yingfu Guo, Hunan Univ. of Science and Technology (China)


Published in SPIE Proceedings Vol. 7130:
Fourth International Symposium on Precision Mechanical Measurements
Yetai Fei; Kuang-Chao Fan; Rongsheng Lu, Editor(s)

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