浮子流量计的应用以及示值误差测量不确定度的评定  

Application of Float Flowmeter and Assessment of Indication Error Measurement Uncertainty

作　　者：张靓 Zhang Liang(Nantong Institute of Metrology and Measurement,Nantong 226011)

机构地区：[1]南通市计量检定测试所,南通市226011

出　　处：《仪器仪表标准化与计量》2020年第6期33-35,共3页Instrument Standardization & Metrology

摘　　要：浮子流量计是一种常用的可变截面式压差流量计量装置,结构简单、成本低、工作可靠性高,可测量流量小和节流压力损失小的特点,因此,在石油、煤炭、冶金、轻化工业、食品卫生等工业领域中广泛应用。本文介绍了浮子流量计的应用,以及示值误差的测量不确定度。测量不确定度是一种对测量结果可信程度的表示方式,文章后半部分讲述了钟罩式气体流量标准装置检定浮子流量计时,其测得值的示值误差不确定度评定方法。依据检定规程气体流量中,用容积法测量浮子流量计的实际流量,用其示值误差的换算公式建立测量模型,分别计算相关关系的输入量的不确定度分量,得到合理的评定结果。The float flowmeter is a common variable cross-section differential pressure flow metering device.It has the characteristics of simple structure,low cost,high reliability,small flow rate and small pressure loss,it is widely used in petroleum,coal,metallurgy,light chemical industry,food safety industry,etc.The paper introduces the application of the rotameter and the measurement uncertainty of the indication error.The second half of the article describes the evaluation method of the uncertainty of indication error of the measured value when the bell-jar type gas flow standard device calibrates the float flowmeter.According to the verification regulation of gas flow,the actual flow rate of the rotameter is measured by the volumetric method,and the measurement model is established by using the conversion formula of the indication error of the rotameter,to get a reasonable assessment.

关 键 词：浮子流量计 测量不确定度 钟罩式气体流量标准装置 

分 类 号：TH814.7[机械工程—仪器科学与技术]