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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.

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In this paper, investigations on turning over of the first low-speed guideway switch for high-speed maglev transportation are introduced. Through geometric nonlinear analyses and comparisons for several characteristics during the turning over process of the switch, a schema with minimum position deviation, smooth changes of line types, gentle variations of stresses, and driving forces, is obtained. Based on the test and verification, the correctness of the theoretical analyses and the feasibility of the turning over schema are proven. The turning over schema has been applied to the low-speed guideway switch and obtained satisfied results. INTRODUCTIONThe low-speed guideway switch for high-speed maglev transportation is the main equipment for maglev trains to transfer from one track to another (Wu, 2003). Just as the high-speed guideway switch (Zhu, 2011), it is also composed of a beam, a set of mechanical subsystem, and the electronic control subsystem.