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本文介绍了国际计量局组织的20～100MPa压力量值国际比对的概况。我国的比对结果十分令人满意。在中、美、英、法、日本、西德、意大利和捷克等8个比对结果较为一致的国家中,我国测量传递标准的活塞有效面积A_0值和压力形变系数λ值与8国测量平均值之差分别为12×10~(-6)和-0.02×10~(-6)[MPa]~(-1),考虑传递标准随时间的变化并作了修正后的结果则分别为4.5×10~(-6)和0.04×10~(-6)[MPa]~(-1),均优于估计不确定度。
This article presents an overview of the international comparison of pressure magnitudes from 20 to 100 MPa organized by the International Bureau of Weights and Measures. The result of our comparison is very satisfactory. Among the eight countries that are more consistent with the comparison results of China, the United States, Britain, France, Japan, West Germany, Italy and the Czech Republic, the A0 value of the piston active area and the value of the pressure deformation coefficient λ of the measurement transmission standard in China are in good agreement with those of the eight countries The difference between the values is 12 × 10 -6 and -0.02 × 10 -6 MPa, respectively. Considering the changes of transmission standard with time and the corrected results are 4.5 × 10 ~ (-6) and 0.04 × 10 ~ (-6) [MPa] ~ (-1), respectively, which are better than the estimated uncertainty.