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%.
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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