基于恒温纯水置换称重法的容积测量方法与不确定度评定

张骏驰, 綦磊, 冯振辉, 芮小博, 孙立军, 杨子涵, 张宇

计量学报 ›› 2026, Vol. 47 ›› Issue (3) : 380-386.

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PDF(990 KB)
计量学报 ›› 2026, Vol. 47 ›› Issue (3) : 380-386. DOI: 10.3969/j.issn.1000-1158.2026.03.09
力学计量

基于恒温纯水置换称重法的容积测量方法与不确定度评定

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Volumetric Measurement Using the Isothermal Pure Water Displacement Weighing Method and Evaluation of Its Measurement Uncertainty

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文章历史 +

摘要

基于恒温纯水置换称重法,设计并构建了正压平缓注水容积测量系统,验证了该系统在测量过程中的可靠性,并在此基础上制定了相应的测量方案与工艺流程。实验结果表明:1 000 ml标准容器及管路的容积测量值为1 008.06 ml,扩展不确定度U k=0.011 1%(k=2);200 ml标准容器及管路的测量值为215.77 ml,扩展不确定度Uk =0.019 7%(k=2)。所提出的方法为微流量校准系统的容积测量提供了稳定、可靠的解决方案,提高了流量计量设备的整体校准精度和测量一致性。

Abstract

A low-velocity positive-pressure injection volume measurement system was designed and constructed based on the constant-temperature pure water displacement weighing approach. The reliability of the system during the measurement process was verified, and accordingly, a corresponding measurement scheme and process flow were established. Experimental results show that the measured volume of the 1 000 mL reference container and its associated piping is 1 008.06 mL, with an expanded uncertainty of 0.011 1% (k=2). For the 200 mL reference container and its piping, the measured volume is 215.77 mL, with an expanded uncertainty of 0.019 7%(k=2). The proposed method provides a stable and reliable solution for volume measurement in micro-flow calibration systems, thereby improving the overall calibration accuracy and measurement consistency of flow metering devices.

关键词

容积测量 / 恒温纯水置换称重法 / 微流量校准系统 / 正压注水 / 不确定度评定

Key words

volume measurement / constant-temperature pure water displacement weighing method / micro-flow calibration system / positive-pressure water injection / uncertainty evaluation

引用本文

导出引用
张骏驰, 綦磊, 冯振辉, . 基于恒温纯水置换称重法的容积测量方法与不确定度评定[J]. 计量学报. 2026, 47(3): 380-386 https://doi.org/10.3969/j.issn.1000-1158.2026.03.09
ZHANG Junchi, QI Lei, FENG Zhenhui, et al. Volumetric Measurement Using the Isothermal Pure Water Displacement Weighing Method and Evaluation of Its Measurement Uncertainty[J]. Acta Metrologica Sinica. 2026, 47(3): 380-386 https://doi.org/10.3969/j.issn.1000-1158.2026.03.09
中图分类号: TB938.3   

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基金

国家重点研发计划(2023YFB3209304)
国家自然科学基金(52272432)
国家自然科学基金(62373276)

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