标准超偏载检测装置测量不确定度评定  

Measurement Uncertainty Evaluation on the Standard Detecting Device for Overload and Unbalance Load

作　　者：彭冲 段小军 李学宝 高长律 PENG Chong;DUAN Xiaojun;LI Xuebao;GAO Changlyu

机构地区：[1]国家轨道衡计量站,北京100081 [2]中国铁道科学研究院集团有限公司标准计量研究所,北京100081

出　　处：《铁道技术监督》2022年第7期10-14,共5页Railway Quality Control

摘　　要：在铁路货车超偏载检测装置量值溯源链中,偏重差、转向架重心偏离量和整车重心偏离量等量值采用理论计算得到,不能直接溯源到国家计量基准,存在一定局限性。通过建立标准超偏载检测装置计量标准,使上述量值可以溯源至国家计量基准。介绍标准超偏载检测装置结构及原理,分析标准超偏载检测装置测量不确定度来源。根据JJF 1059.1—2012《测量不确定度评定与表示》,采用测量不确定度表示指南法评定标准超偏载检测装置测量不确定度。评定结果表明,标准超偏载检测装置转向架单侧2个称重单元组合、整车单侧4个称重单元组合和转向架4个称重单元组合质量的扩展测量不确定度,均小于其最大可接受扩展不确定度,满足量值溯源要求。In the value traceability chain of detecting device for overload and unbalance load of rail wagons, the weight deviation, bogie center of gravity deviation and vehicle center of gravity deviation are calculated theoretically,which can not be directly traceable to the national measurement standards, and there are certain limitations. By establishing the measurement standard of the standard detecting device for overload and unbalance load, the measurement value can be traced to the national measurement standard. This paper introduces the structure and principle of the standard detecting device for overload and unbalance load, and analyzes the source of measurement uncertainty of the standard detecting device for overload and unbalance load. According to JJF 1059.1—2012 Evaluation and expression of uncertainty in measurement, the measurement uncertainty expression guide method is adopted to evaluate the measurement uncertainty of the standard detecting device for overload and unbalance load. The evaluation results show that the extended uncertainty of measurement mass of bogie with two weighing units on one side, bogie with four weighing units on one side and bogie with four weighing units on the other side of the standard detecting device for overload and unbalance load is all less than its maximum acceptable extended uncertainty, which meets the requirement of traceability.

关 键 词：标准超偏载检测装置 超偏载装置计量车 测量不确定度 评定 

分 类 号：TB932[一般工业技术—计量学] U294.17[机械工程—测试计量技术及仪器]