柴油堵塞倾向性测定时间的不确定度评定

Evaluation of Uncertainty in Determining Filter Blocking Tendency of Diesel

以JJF1059.1—2012《测量不确定度评定与表示》规范,对柴油堵塞倾向性时间测定。实验中,由各影响因素引入的不确定分量进行了不确定度分析和评定,结果表明其主要来源是真空泵的压力和重复性测定,其次是样品量取的体积、样品温度和秒表测定时间的影响,从而可对此方法的可行性和准确性进行科学判断,为改进试验工作指明了路径。

Based on the measurement of filter blocking tendency of diesel denoted by time,according to the rule of measuring uncertainty,the mathematical model was established and used to analyze and evaluate the uncertainty components in the determination process. It is pointed out that the uncertainty of diesel blocking tendency time measured mainly come from the effluence of repeatability test,pressure of the vacuum pump,measurement of samples volume,determination of stopwatch time and temperature of the sample,and the feasibility and accuracy of the method was scientifically evaluated.