基于旋转激光传感的多轨纵向位移在线监测方法  

Online monitoring method for longitudinal displacement of multiple rails based on rotary laser sensing

作　　者：颜荣 伍剑波[1] 王杰[1] 荆学喜 丁玉柱 康轩 YAN Rong;WU Jianbo;WANG Jie;JIN Xuexi;DING Yuzhu;KANG Xuan(College of Mechanical Engineering,Sichuan University,Chengdu,Sichuan 610065,China;Jiayuguan Maintenance Section of China Railway Lanzhou Group Co.,Ltd.,Jiayuguan,Gansu 735103,China)

机构地区：[1]四川大学机械工程学院,四川成都610065 [2]中国铁路兰州局集团有限公司嘉峪关工务段,甘肃嘉峪关735103

出　　处：《机车电传动》2023年第6期56-62,共7页Electric Drive for Locomotives

基　　金：国家自然科学基金项目(51505308)。

摘　　要：钢轨纵向位移变化引起的断轨和胀轨会严重影响列车行驶安全。针对钢轨位移检测高精度、非接触和多轨测量的需求,文章提出一种基于旋转激光位移传感的多轨纵向位移在线监测方法,利用固定在钢轨上的角度标板将钢轨纵向位移转换为标板横向位移,然后利用旋转激光传感器同时采集多根钢轨标板横向位移,在此基础上提出基于滑动窗口阈值的凹槽特征识别方法,实现标板横向位移的测量准确性与稳定性。最后,将开发的钢轨位移监测系统部署在甘肃省嘉峪关市兰新线上行K730+000处进行长期测试。试验结果表明,新方法可实现多轨纵向位移的长期稳定在线监测与预警。Rail breakage and expansion resulting from changes in longitudinal displacement of the steel rail pose a significant threat to train safety.To address the need for high-precision,non-contact and multi-rail displacement detection,an online monitoring method for multi-rail longitudinal displacement based on rotary laser sensing was proposed in this paper.Angular gauge plates fixed on rails were used to convert the longitudinal displacement of rails into lateral displacement of gauge plates,and the lateral displacement of rail gauge plates were then captured by the rotary laser sensor.On this basis,a groove feature recognition method utilizing a sliding window threshold was proposed to ensure accurate and stable measurement of the lateral displacement of gauge plates.Finally,the developed rail displacement monitoring system was deployed for long-term testing at K730+000 on the Lanzhou-Urumqi railway in Jiayuguan city,Gansu province.The test results show that the proposed method could ensure long-term and reliable online monitoring and early warning of longitudinal displacement for multiple rails.

关 键 词：多轨纵向位移 在线监测 激光传感 标板特征识别 高速铁路 

分 类 号：U213.2[交通运输工程—道路与铁道工程]