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Proceedings Paper

Probe parameters calibration for articulated arm coordinate measuring machine
Author(s): Wentao Cheng; Yetai Fei; Liandong Yu; Ruichang Yang
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Paper Abstract

Articulated Arm Coordinate Measuring Machine (AACMM) is a kind of portable coordinate measuring equipment with a flexible structure, which employs a series of rotating components around generally perpendicular axes. As a portable device, the probe parameters of AACMM will change after probe switching or dismounting and reassembling the same probe during shipping AACMM from one place to another to carry out measurement tasks. As incorrect coordinates will be given without the correct probe parameters, the probe parameters must be re-identified. By analyzing the identifiability of geometrical parameters of kinematical model and presenting the non-redundant-parameter model in this paper, a simple approach for the probe parameters calibration of AACMM is proposed, to improve its portability and ensure the accuracy of AACMM. In addition a very simple accessory was designed to hold the spherical probe as a data capture device. Gauss-Newton method was adopted as an optimization method to figure out the probe parameters. A program was developed to carry out the calibration process. Experimental results prove that the calibration approach proposed in the paper was effective.

Paper Details

Date Published: 31 December 2010
PDF: 7 pages
Proc. SPIE 7544, Sixth International Symposium on Precision Engineering Measurements and Instrumentation, 75445K (31 December 2010); doi: 10.1117/12.885303
Show Author Affiliations
Wentao Cheng, Hefei Univ. of Technology (China)
Yetai Fei, Hefei Univ. of Technology (China)
Liandong Yu, Hefei Univ. of Technology (China)
Ruichang Yang, Hefei Univ. of Technology (China)

Published in SPIE Proceedings Vol. 7544:
Sixth International Symposium on Precision Engineering Measurements and Instrumentation
Jiubin Tan; Xianfang Wen, Editor(s)

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