刮板流量计检定结果不确定度评定

Evaluation of Uncertainty in Verification Results of Scraper Flowmeter

刮板流量计是原油动态计量最常用的计量器具之一,其计量性能、计量准确度将直接影响原油贸易双方的经济利益。介绍了刮板流量计的检定原理,通过标准体积管在线检定刮板流量计理论计算公式确定测量不确定度的来源,通过计算不确定度分量,进行不确定度的分析及评定,根据不确定度对合成不确定度的贡献值结果,分析影响刮板流量计检定的因素,并提出了相应合理化解决对策及建议。

The scraper flowmeter is one of the metering instruments which are often used in crude oil dynamic transportation,and its measuring performance and accuracy will directly affect the economic interests of both sides of the crude oil trade.The verification principle of the scraper flowmeter is introduced.The source of measurement uncertainty is determined according to the theoretical calculation formula of the standard volumetric tube online verification of the scraper flowmeter.The analysis and evaluation of the uncertainty are carried out through calculation of the weight of the uncertainty.The factors affecting the calibration of the scraper flowmeter are conducted according to the contributed results of the uncertainty to the synthesized uncertainty.The corresponding reasonable solutions and suggestions are puts forward.