采用标准长度的激光多边法坐标测量系统自标定算法

doi:10.3969/j.issn.1000-1158.2019.01.10

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Abstract The coordinate measuring system based on laser multilateral tracking method has remarkable superiority in the large scale measurement filed,and the accurate calibration of system parameters is the key to achieve high-precision coordinate measurement.To overcome the shortcomings of the traditional calibration method,an improved self-calibration algorithm by using standard length is proposed. Firstly,a number of fixed points are set in the stable base,and the accurately standard lengths along X,Y,Z directions are measured using laser interference method respectively.Then the standard lengths are used to constructed self-calibration optimization functions.By increasing the weight of the corresponding optimization function, the coordinates measurement accuracy is improved further.The feasibility of the algorithm is verified through simulation experiments.Also,the actual experiments are conducted to verify the measurement accuracy of the developed system in large scale range.By comparing with independent laser interferometer measurement results, the error of two groups are distributed in the［-9.5 μm, 4.6 μm］ range as the distances between the compared points to the origin of the coordinate measure system are distributed in the［7.0 m,8.3 m］ interval. The results show that the measurement accuracy of large scale coordinate significantly is improved by the proposed self-calibration algorithm.

Key words： metrology large scale measurement laser multilateral method self-calibration algorithm standard length laser tracking interferometer

Received: 26 February 2018 Published: 07 January 2019

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TB92

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	Articles by authors
	ZHENG Ji-hui
	MIAO Dong-jing
	LI Jian-shuang
	XU Zhi-ling
	HE Ming-zhao
	LI Lian-fu

Cite this article:

ZHENG Ji-hui,MIAO Dong-jing,LI Jian-shuang, et al. Self-calibration Algorithm for Laser Multilateral Coordinate Measurement System Using Standard Length Method[J]. Acta Metrologica Sinica, 2019, 40(1): 64-70.

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http://jlxb.china-csm.org:81/Jwk_jlxb/EN/10.3969/j.issn.1000-1158.2019.01.10 OR http://jlxb.china-csm.org:81/Jwk_jlxb/EN/Y2019/V40/I1/64

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