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| Research on Non-contact Speed Meter Comparison in China |
| SUN Qiao1,DU Lei1,BAI Jie1,CAO Jin2,WANG Li-fang2,SU Yang2 |
1. National Institute of Metrology, Beijing 100029, China
2. Chongqing Academy of Metrology and Quality Inspection, Chongqing 401120, China |
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Abstract The national comparison of non-contact speed meters was finished in 2018. The pilot lab was National Institute of Metrology, China. As the first comparison of fixed measurement spot type in on-site speed measuring metrology, 29 participating laboratories were involved, among which 27 were provincial level metrological institutes. All participating laboratories got satisfied results. The technical background and comparison program were introduced, the comparison method and uncertainty components were studied, the metrological particularities of speed measurement were proposed, and the comparison results were analyzed.
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Received: 14 March 2019
Published: 02 November 2020
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2020, Vol. 41 
