采用双剪力传感器的铁路货车超偏载检测装置设计

Design of Detecting Device for Overload and Unbalance Load of Rail Wagons Using Dual Shear Force Sensors

针对在既有线安装铁路货车超偏载检测装置存在的施工周期长、成本高、对线路条件要求高等问题,设计一种采用双剪力传感器的铁路货车超偏载检测装置。在介绍采用双剪力传感器的铁路货车超偏载检测装置设计原理的基础上,分析这种铁路货车超偏载检测装置的总体技术要求及设计方案,评定其测量不确定度,并进行检定和应用验证。结果表明,采用双剪力传感器的铁路货车超偏载检测装置各秤量点的重量测量结果不确定度均小于称重最大允许误差的1/3,满足计量性能要求;重量、偏重和偏载率检定结果均满足设计要求;与现有铁路货车超偏载检测装置测得的货车重量、偏重差、偏载率相比,采用双剪力传感器的超偏载检测装置测得的货车重量、偏重差、偏载率的偏差均较小,检测结果准确度满足货运安全检测要求。

Aiming at the problems of long construction period,high cost,and high requirements for line conditions of the detecting device for overload and unbalance load of rail wagons installed on existing lines,a detecting device for overload and unbalance load of rail wagons using dual shear force sensors is designed.On the basis of introducing the design principle of a detecting device for overload and unbalance load of rail wagons using dual shear force sensors,this paper analyzes the overall technical requirements and design scheme of this kind of detecting device for overload and unbalance load of rail wagons.The measurement uncertainty of the detecting device for overload and unbalance load of rail wagons using dual shear force sensors is evaluated,and verification and application certification are conducted.The results show that the uncertainty of weight measurement results at each weighing point of the detecting device for over⁃load and unbalance load of rail wagons using dual shear sensors is less than 1/3 of the maximum allowable weighing er⁃ror,which meets the requirements of metrological performance;verification results of the weight,unbalance load,and eccentricity rate all meet the design requirements;compared with the weight,deviation,and deviation rate measured by the existing detecting device for overload and unbalance load of rail wagons,the deviation of the weight,unbalance load deviation,and eccentricity rate of the detecting device for overload and unbalance load using dual shear force sensors is relatively small,and the accuracy of detection results meets the requirements of freight safety detection.