原油站刮板流量计测量结果不确定度评定

The uncertainty evaluation of the result measured by a scraper flowmeter in oil station

刮板流量计是一种常用的动态计量器具,其计量准确性取决于测量人员、计量器具的准确度、计量介质的性质、计量方法以及计量空间的准确性。对于一台给定的刮板流量计,以上5种因素还随着工作条件(压力、温度)的变化而变化。因此,对刮板流量计进行不确定度评定与分析要充分考虑各方面的影响因素,使测量结果更加完善准确。

The scraper flowmeter is a general purpose dynamic measurement instrument. Its measurement accuracy depends on the surveyors, the accuracy of measurement instrument, the nature of measurement medium, measuring methods and the accuracy of the measurement space. For a given scraper flowmeter, the five affecting factors above may change along with the working conditions （pressure and temperature） change. To make the measured results more accurate, the affecting factors in various sides should be fully considered when the uncertainty of a scraper flowmeter is evaluated and analyzed.