活塞式气体流量标准装置活塞缸内径测量及不确定度评估

doi:10.3969/j.issn.1000-1158.2021.10.03

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摘要针对活塞缸自身结构特点对测量器具的限制,提出了三坐标测量机测量活塞缸内径的方法。以名义内径为19mm、45mm、140mm的活塞缸为例,对活塞缸的内径、外径和厚度进行测量,比较不同方法测量得到的活塞缸内径的差异,验证了三坐标测量机测量活塞缸内径的可靠性。此外,分析了活塞缸的形状特征对其内径测量不确定度的影响,得到活塞缸内径测量结果分别为18.999mm、44.983mm、139.975mm,测量相对不确定度分别为0.016%、0.015%、0.010%。

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	李培晶
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关键词 ：计量学;微小气体流量;活塞缸;内径测量;三坐标测量机, 不确定度

Abstract：Due to the limit of the structural characteristics of piston cylinder for the measuring instrument, a measuring method for the inner diameter of the piston cylinder with three coordinate measuring machine was proposed. Taking the piston cylinders with nominal inner diameters of 19mm, 45mm, and 140mm as examples,the measurements for the inner diameter,external diameter and thickness of the piston cylinder were carried out. The difference of the inner diameter of the piston cylinder obtained with different measurement methods was analyzed and compared, and the reliability of the three coordinate measuring machine for measuring the inner diameter of the piston cylinder was verified. In addition, the influence of the shape characteristics of the piston cylinder on the uncertainty of its inner diameter measurement was analyzed. The measurement results of the inner diameter of the piston cylinder is 18.999mm, 44.983mm, 139.975mm respectively, and the relative measurement uncertainty is 0.016. %, 0.015%, 0.010%.

Key words： metrology small gas flow the piston cylinder inner diameter measurement three coordinate measuring machine uncertainty

收稿日期: 2020-01-06 发布日期: 2021-10-18

PACS:

TB937

基金资助:国家重点研发计划(2017YFF0205305)

通讯作者: 李春辉(1977-), 女, 天津蓟县人, 中国计量科学研究院研究员, 主要从事气体流量计量方面的研究。Email:lich@nim.ac.cn E-mail: cuils@nim.ac.cn

作者简介: 李培晶(1995-),女,山西临汾人,中国计量科学研究院在读硕士研究生,主要研究方向为气体流量计量方面。Email:lipeijing525@126.com

引用本文:

李培晶,崔骊水,李春辉. 活塞式气体流量标准装置活塞缸内径测量及不确定度评估[J]. 计量学报, 2021, 42(10): 1275-1281.
LI Pei-jing,CUI Li-shui,LI Chun-hui. The Inner Diameter Measurement and Uncertainty Evaluation on the Piston Cylinder of Piston Gas Flow Standard Device. Acta Metrologica Sinica, 2021, 42(10): 1275-1281.

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