基于惯性法的磁浮轨道长波不平顺检测及其实现  

Implementation of Detecting Maglev Track Long Wave Irregularity Based on Inertial Measurement Principle

作　　者：郑树彬[1] 林建辉[1] 林国斌 

机构地区：[1]西南交通大学牵引动力国家重点实验室,成都610031 [2]国家磁浮交通工程技术研究中心

出　　处：《电子测量与仪器学报》2007年第1期61-65,共5页Journal of Electronic Measurement and Instrumentation

基　　金：国家863磁浮专项资助项目(编号:2005AA505010-511)。

摘　　要：轨道长波不平顺是影响磁浮列车平稳性和乘坐舒适性的主要因素,利用自动化测试系统是检测轨道平顺性的有效手段。提出了一种用于磁浮轨道长波不平顺的惯性检测方法,结合GPS技术实现轨道的定位。配置相应的检测系统,系统中利用多线程并行处理技术实现GPS-OEM板数据和数采卡数据的同步记录;由速度信号控制加速度信号和间隙信号的等空间间隔采样;并且设计了线性相位IIR移变滤波器来实现对长波不平顺成分的提取。测试结果表明该检测方法能实现磁浮轨道长波不平顺准确测量,检测结果不受列车运行速度变化的影响,可方便的提取特定波长范围内的轨道不平顺成分,同时使用GPS能准确可靠的实现梁跨范围内的定位。Long wave irregularity of track is a primary factor that affects both steadiness and ride comfort of maglev train. Automatic measurement system is an effective method for detecting the track smoothness. An inertial measurement method for detecting long wave irregularity of maglev track is presented, which uses GPS technology to decide the track position. A corresponding measurement system was built, in which the parallel processing technique of muhithreading is applied to record synchronously the data from GPS-OEM board and the data from DAQ card; acceleration signal and gap signal are sampled at equal space intervals controlled by velocity signal, and a linear phase IIR variable filter is designed to extract long wave components from the measured signal. The test results show that this method is practicable for detecting long wave irregularity of maglev track accurately, the measured result is immune to the variation of speed, extracted in a convenient manner, and with the the irregularity component within defined wavelength scope could be help of GPS the measurement system could search the track position within the range of a girder accurately and reliably.

关 键 词：轨道检测 高速磁浮 长波不平顺 GPS 移变滤波器 

分 类 号：U216.3[交通运输工程—道路与铁道工程]