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Proceedings Paper

Research on calibration method of hybrid Body-in-White online measurement system
Author(s): Xinlin Jia; Changjie Liu; Lifang Wang; Zekun Jing; Zixiong Li
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Paper Abstract

In the online measurement of automotive body-in-white, the fixed visual online measuring equipment and flexible visual online measuring equipment are often used in the field to meet different measurement requirements. Therefore, it is necessary to calibrate the two systems separately before measurement. The hybrid measurement equipment’s calibration is involuted and inefficient. So, in this paper, an integral-fast calibration method for flexible and fixed on-line detection equipment is proposed to solve these problems. In this paper, the calibration theory and the on-site calibration technique are described in detail. The following is a summary of the calibration process. First, measuring the same target simultaneously with the fixed vision sensor and the flexible vision sensor. Then, according to the robot's own coordinate equipment relationship in the flexible measurement, the control points are multipath measured and the hand-eye relationship of the robot is calculated. Then, the relationship between the vehicle body coordinate equipment and the robot base coordinate equipment is calculated by using the laser tracker according to the vehicle body positioning reference and the target control point. At last, and the coordinate equipment conversion relationship of the fixed measurement equipment is simultaneously calibrated according to the result of the flexible measurement equipment. Eliminating the section for separate measurement of the fixed measurement equipment by the laser tracker and saving calibration time. Ensuring the overall measurement consistency of the hybrid measurement equipment. We designed a verification test and the test results show that the standard deviation of the calibration method can reach 0.15mm, and the calibration method has high efficiency and simple method, which can meet the calibration requirements of the body-in-white measuring equipment in the field environment.

Paper Details

Date Published: 12 March 2020
PDF: 9 pages
Proc. SPIE 11439, 2019 International Conference on Optical Instruments and Technology: Optoelectronic Measurement Technology and Systems, 114391A (12 March 2020); doi: 10.1117/12.2548982
Show Author Affiliations
Xinlin Jia, Tianjin Univ. (China)
Changjie Liu, Tianjin Univ. (China)
Lifang Wang, China Shipbuilding Industry Corp. (China)
Zekun Jing, Tianjin Univ. (China)
Zixiong Li, Tianjin Univ. (China)

Published in SPIE Proceedings Vol. 11439:
2019 International Conference on Optical Instruments and Technology: Optoelectronic Measurement Technology and Systems
Jigui Zhu; Kexin Xu; Hai Xiao; Sen Han, Editor(s)

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