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| Uncertainty Analysis and Evaluation of Form Measurement Task for CMM |
| CHENG Yin-bao1,2,CHEN Xiao-huai3,WANG Zhong-yu2,WANG Han-bin4,LI Hong-li3,LI Ya-ru2 |
1. College of Metrology & Measurement Engineering, China Jiliang University, Hangzhou, Zhejiang 310018, China
2. School of Instrumentation Science & Opto-Electronics Engineering, Beihang University, Beijing 100191, China
3. School of Instrument Science & Opto-Electronics Engineering, Hefei University of Technology, Hefei,Anhui 230009, China
4. Fujian Metrology Institute, Fuzhou, Fujian 350003, China |
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Abstract The coordinate measuring machine (CMM) uncertainty for evaluating the form errors-oriented measurement tasks has been systematically studied, thus the rapid and reliable evaluation of the CMM measurement uncertainty can be realized.Two uncertainty combined methods based on Guide to the Expression of Uncertainty in Measurement (GUM) and Monte Carlo method are provided.The feasibility of the evaluation method has been verified by measurement example of flatness.The experimental result shows that precision significance of uncertainty determined by GUM is unreliable, the expanded uncertainty increased by 11.1% compared with actual situation.To systematically solve the problem of the CMM uncertainty for evaluating the measurement tasks targeting form errors is typical and representative, which can be effectively applied to solve the uncertainty evaluation problems of other precision instruments.
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Received: 22 November 2018
Published: 17 February 2020
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2020, Vol. 41 
