高速铁路无缝钢轨纵向位移在线监测方法研究  

Study on the monitoring method of longitudinal displacement for the high-speed continuous welded rail

作　　者：史红梅[1] 余祖俊[1] 朱力强[1] 刘文琪[1] 

机构地区：[1]北京交通大学机械与电子控制工程学院,北京100044

出　　处：《仪器仪表学报》2016年第4期811-817,共7页Chinese Journal of Scientific Instrument

基　　金：国家自然基金重点(61134003)项目资助

摘　　要：无缝钢轨在温度改变时会发生纵向位移,严重时引发胀轨、断轨,影响行车安全。针对此问题本文提出一种基于磁致伸缩原理的非接触式钢轨纵向位移在线监测方法,设计了系统总体方案、传感器安装方式以及基于卡尔曼滤波的数据处理算法。系统经标定和校准,测量最大示值误差为0.07 mm。为减小温度变化对测量结果的影响,通过温度实验研究了温度补偿算法,在50℃的温度变化范围内测量位移输出漂移不大于0.05 mm。在大西高铁线的现场试验结果表明,该系统能实现测量范围±100 mm的钢轨纵向位移监测,测量精度达0.1 mm。Rail temperature changes bring the longitudinal displacement of the continuous welded rail （ CWR）, causing buckling or broken rail, which seriously affect the operation safety. A non-contact magnetostrietive monitoring method of rail longitudinal displacement is presetned. The overall system, as well as the sensor installation and data processing algorithm based on Kalman filter, are designed. The maximum indication error of the output displacement is 0.07 mm after the system is calibrated. In order to reduce the effect of temperature changes on measurement results, the compensation algorithm is studied through temperature experiments. The output temperature drift of the displacement is less than 0.05 mm within 50~C temperature changes. The field test results of Datong to Xi＇ an high-speed line show that the system can realize the monitoring of rail longitudinal displacement with the measurement range of -＋ 100 mm, and the accuracy is up to 0.1 mm.

关 键 词：无缝钢轨 纵向位移 磁致伸缩位移传感器 温度补偿 卡尔曼滤波 

分 类 号：U216.3[交通运输工程—道路与铁道工程] TH865[机械工程—仪器科学与技术]