俯仰轴轴线位置的视觉标定方法研究

doi:10.3969/j.issn.1000-1158.2022.04.04

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Abstract With regard to the calibration difficulty of pitch axis positions in the five-axis vision measuring system for film cooling holes, a new calibration method based on industrial camera and specially designed target was proposed. During the implementation of the method, a cuboid metal block with sharp and intact edges was applied as the calibration target. In the calibrating procedure, the target was placed at different positions and postures by the rotations of the pitch axis. Afterwards, the industrial camera focused on the surfaces of the target in different situations and then captured the images of the same goal edge on the front surface and upper surface respectively. According to the constraint condition established by the uniqueness of the goal edge extracted from those images, spatial position of the pitch axis in the measuring space denoted by O-XYZ would be calculated by solving simultaneous equations. At last, to verify the calibration method and results, a test piece was measured 10 times by the system after pitch axis position calibration, whose nominal size was 60mm. As shown in the inspecting experiments, the limit errors of single measurement of the length dimension were ±0.0216mm, and the measuring errors of those experimental results were all smaller than ±0.012mm, which manifested the feasibility and effectiveness of the calibration method proposed.

Key words： metrology pitch axis position calibration two-axis turntable target machine vision

Received: 26 January 2021 Published: 08 April 2022

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TB92

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	Articles by authors
	BI Chao
	ZHAO Yuan
	HAO Xue
	FANG Jian-guo

Cite this article:

BI Chao,ZHAO Yuan,HAO Xue, et al. Research on Vision Calibration Method of the Pitch Axis Position[J]. Acta Metrologica Sinica, 2022, 43(4): 457-463.

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http://jlxb.china-csm.org:81/Jwk_jlxb/EN/10.3969/j.issn.1000-1158.2022.04.04 OR http://jlxb.china-csm.org:81/Jwk_jlxb/EN/Y2022/V43/I4/457

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