扭矩加载装置标准不确定度

扭矩加载装置的不确定度随被测量对象而变化,通常参考实验数据或长期的测量经验来估计。通过对扭矩扳手的受力与误差原因分析,以B类方法来评定加载装置的标准不确定度,推导各种矢量作用下引入的标准不确定度的计算公式,将实验方法和经验方法改变为量化方法,所得到的相对不确定度与扭矩扳手有效力臂长度、传感器的长度、结构表面的粗糙度、转换接头有关。此量化结果与PTB的实验结果相吻合,对扭矩扳手检定仪的设计制造和用户选择设备具有参考意义。

Standard Uncertainty in Torque Loader

The uncertainty of torque loader vary according to the measured object,usually referred the experimental data or long - term measurement experience to estimate it. Based on analyzing the forces of torque wrench and the error sources,type B is used to evaluate standard uncertainty of torque loader,derived the formula of calculating the standard uncertainty under various vector action,changing the experimental methods and empirical methods into the quantification method,the relative uncertainty obtained in connection with the effective length of force arm of torque wrench,the length of sensor,the roughness on the surface of structure and an adaptor. The quantitative results agree well with the experimental results by PTB,it has guiding significance on design and manufacture the device for calibrating torque wrenches as well as user selects the device.