气体流量标准装置的研制  

Develepment of Gas Flow Standard Facilities

作　　者：刘辰魁 李同波 张红刚 于巍 屈宏强 卜占成 

机构地区：[1]河北省计量监督检测院,河北石家庄050051

出　　处：《计量学报》2008年第5期454-456,共3页Acta Metrologica Sinica

摘　　要：介绍了音速喷嘴法和标准表法相结合的气体流量标准装置的原理、组成、主要技术措施以及特点等。通过控制管路机械加工影响量,控制温度、压力、湿度和数据采集系统各环节的不确定度,采用湿度在线补偿,音速喷嘴按实测最大背压比进行控制,以及采取一系列抗干扰措施等,使本装置的扩展不确定度达到了0.25%(k=2)。The principle, composition, main technology measures and characteristics of the gas flow standard facilities composed by combining a sonic nozzle method and a standard meter method were introduced. The expanded uncertainty of the facilities is 0.25 % （ k = 2） by controlling the machining influence quantity of pipeline, the uncertainties of temperature, pressure, humidity and data acquisition system and the measured maximum back-pressure ratio and using the humidity on-line compensation and a series of anti-jamming measures.

关 键 词：计量学 气体流量标准装置 音速喷嘴法 标准表法 在线湿度补偿 最大背压比 

分 类 号：TH814[机械工程—仪器科学与技术] TP274.2[机械工程—精密仪器及机械]