临界流文丘利喷嘴法气体流量标准装置的不确定度评定  

Uncertainty of Measurement Evaluation about the Critical Flow Venturi Nozzle Gas Flow Standard Device Technology

作　　者：薛飞 Xue Fei

机构地区：[1]宝鸡市质量技术检验检测中心

出　　处：《计量与测试技术》2019年第11期108-109,113,共3页Metrology & Measurement Technique

摘　　要：本文对以文丘利喷嘴为标准表,采用负压法检定气体流量计的标准装置进行了不确定度评定。结果表明:整套装置的相对扩展不确定度为0.33%,性能稳定可靠,满足开展本地区气体流量计检定工作的要求。In this paper,the uncertainty evaluation of the standard equipment of gas flowmeter is carried out by using the venturi nozzle as the standard meter and adopting the negative pressure method.The results show that the relative extended uncertainty of the whole equipment is 0.33%,the performance is stable and it can meet the requirements of gas flowmeter verification in this area.

关 键 词：文丘利喷嘴 负压法 不确定度评定 

分 类 号：TH814[机械工程—仪器科学与技术]