National Maglev Transportation Engineering R&D Center, Tongji University, Shanghai 201804, China.
Institute of Railway and Urban Mass Transit, Tongji University, Shanghai 201804, China.
Sensors (Basel). 2021 May 7;21(9):3236. doi: 10.3390/s21093236.
Guideway inspection is of great significance to the operation safety and riding quality of a commercial high-speed maglev transportation system. When analyzing guideway inspection data, it is important to obtain the location information for each piece of raw data and convert it from the time domain to the spatial domain for the analysis afterward. Previous studies have used the method of adding additional hardware such as GPS (global positioning system) receivers, LRF (location reference flag) readers, or onboard CAN (controller area network) bus adaptors to obtain location information. This paper presents a novel method for indirectly obtaining the location information via the use of data from the levitation and guidance control sensors perpendicular to the longitudinal direction to extract the characteristic information from the track. The method can be used for a long stator linear motor-driven maglev system and similar contactless rail transit systems. The results showed that the method could accurately identify the required location information in each stator tooth during the entire operation simultaneously with the operating information such as train velocity, direction, and track ID, without additional hardware installation and vehicle network connection. Thus, it could improve the pertinence of the results of guideway inspection equipment, and at the same time, facilitate the miniaturization and independence of guideway inspection equipment.
轨道检测对商业高速磁悬浮运输系统的运行安全和乘坐质量具有重要意义。在分析轨道检测数据时，重要的是要获取每段原始数据的位置信息，并将其从时域转换到空间域，以便后续进行分析。之前的研究使用了添加 GPS（全球定位系统）接收器、LRF（位置参考标记）读取器或车载 CAN（控制器局域网）总线适配器等附加硬件的方法来获取位置信息。本文提出了一种通过使用垂直于纵向方向的悬浮和导向控制传感器的数据来间接获取位置信息的新方法，以从轨道中提取特征信息。该方法可用于长定子直线电机驱动的磁悬浮系统和类似的非接触式轨道运输系统。结果表明，该方法无需额外的硬件安装和车辆网络连接，即可在整个运行过程中同时与列车速度、方向和轨道 ID 等运行信息一起准确识别每个定子齿所需的位置信息。因此，它可以提高轨道检测设备的结果针对性，同时方便轨道检测设备的小型化和独立性。
