液化气体铁路罐车容积测量不确定度的评定  

Evaluation on the Uncertainty in Volume Measurement of Rail Tanker for Liquefied Gases

作　　者：周宝珑[1] 傅青喜[1] 邵学君[1] 闫凤霞[1] 丁建兴[2] 

机构地区：[1]中国铁道科学研究院标准计量研究所,北京100081 [2]国家铁路罐车容积计量站西安分站,陕西西安710086

出　　处：《铁道技术监督》2011年第11期14-16,共3页Railway Quality Control

摘　　要：对采用几何测量法检定的液化气体铁路罐车容积进行不确定度评定,建立数学模型,确定灵敏系数,从内竖直径测量、内横直径测量、内总长测量、封头容积和筒体变形等方面评定该方法的标准不确定度。几何测量法检定结果的扩展不确定度为3.2×10-3(k=2),满足液化气体铁路罐车容积检定规程的计量性能要求。To evaluate the uncertainty in volume measurement of rail tankers for liquefied gases using geometric method,the mathematical model is constructed and the sensitivity coefficients are defined.The standard uncertainty is evaluated according to such factors as measuring inside vertical diameters,measuring inside cross diameters,measuring total inside length,volume of head and deformation of the tank.The expanded uncertainty in measurement by geometric method is 3.2×10-3（k=2）,which meets the metrological requirements in the verification regulation of volume of rail tankers for liquefied gases.

关 键 词：计量 罐车 几何测量法 不确定度 评定 

分 类 号：U272.4[机械工程—车辆工程] TB92[交通运输工程—载运工具运用工程]