基于中点弦测法的中低速磁浮轨道不平顺检测  

Detection of Medium and Low Speed Maglev Track Irregularity Based on MCO

作　　者：高雄杰 于龙[1] 陈唐龙[1] GAO Xiongjie;YU Long;CHEN Tanglong(School of Electrical Engineering,Southwest Jiaotong University,Chengdu 610031,China)

机构地区：[1]西南交通大学电气工程学院,四川成都610031

出　　处：《铁道学报》2020年第8期116-122,共7页Journal of the China Railway Society

基　　金：国家自然科学基金(U1734202)。

摘　　要：针对中低速磁浮F轨轨道不平顺检测问题,提出基于机器视觉测量技术的中点弦测方法。由一组激光摄像式传感器检测轨道轮廓,进行图像处理、特征点提取以及世界坐标系转换后,计算得到轨道不平顺正矢值,通过“以小推大”、差值方法得到不同弦长的不平顺值,并为长沙磁浮快线研制了MTDS-1型车载非接触式中低速磁浮F轨轨道动态检测装置。选取株洲电力机车有限公司的磁浮交通系统中心试验线为试验地点,测试结果表明:在20 km/h和25 km/h的速度下测得的4 m弦和10 m弦轨道不平顺满足精度要求,验证了轨道不平顺检测数据的一致性,该检测方法能实现中低速磁浮轨道不平顺的准确测量,检测结果不受列车运行速度变化的影响。Aiming at the problem of track irregularity detection of F-shaped rail of medium and low speed maglev track,the mid-chord offset(MCO)method based on machine vision measurement technology was proposed.The track contour was detected by a group of laser camera sensors,to conduct image processing,feature point extraction and world coordinate system conversion,before the track irregularity vector value was obtained.Different chord irregularities were obtained by“Using small fetch big”method and the Interpolation Filter.The MTDS-1 type vehicle mounted non-contact dynamic detection device for the medium low speed maglev F-shaped rail was developed for Changsha Maglev Express Line.The Maglev Test Center of CRRC Zhuzhou Locomotive Co.,Ltd.was chosen as the test site.The test results show that the track irregularities of 4 m and 10 m chords measured at the speeds of 20 km/h and 25 km/h can meet the precision requirements,and verify the consistency of the track irregularity detection data.This method can realize the accurate measurement of the maglev track irregularity,and the test results are not affected by the change of the train speed.

关 键 词：中点弦测法 F轨 轨道不平顺 中低速磁浮列车 

分 类 号：U216.3[交通运输工程—道路与铁道工程]