液化气体铁路罐车容积测量不确定度的评定

摘要

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.%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。