Research On Location And Speed Measurement Of Medium Speed Maglev Train Based On Induction Loop

Considering the characteristics of high-speed maglev and low speed maglev,a design scheme of medium speed maglev train based on medium and low speed suspension structure and long stator synchronous traction is proposed.Due to the synchronous traction of the medium speed maglev train and the cogging structure of the air core long stator,the slot counting positioning and speed measuring method based on inductance effect is unable to adopt the high speed maglev.Therefore,it is necessary to study a new location and speed measurement method to obtain the real-time position and speed information of the train to realize closed loop traction,so as to achieve the rapid and stable operation of the train.Based on the background of medium speed maglev train,the medium speed maglev train induction loop to solve the problem of position and velocity,and,due to the use of the ground positioning speed measuring mechanism,does not need to train ground communication facilities complex,ground traction system can obtain train position and speed.The main work and innovation of this paper are as follows:1.The electromagnetic model of induction loop is established,and its simulation is verified by MATLAB and finite element analysis software ANSOFT.According to the simulation results,the appropriate parameters are selected to determine the final structure of the loop.2.Aiming at the induction signal of ground loop,from signal demodulation to absolute positioning and relative positioning method,a series of signal processing methods are proposed,and the train location information is obtained by solving the original loop signal.3.The signal noise of the loop system is analyzed.It is known from the analysis result that the traction current is the main source of the loop signal noise,and the noise is the colored noise related to the frequency of the traction switch.In this regard,a signal processing method based on particle filter is proposed,and applied to the loop system to filter the colored noise in the signal.4.Location and speed detection system based on induction loop designed in this paper for the national defense science and 204 m medium speed maglev test line,respectively from two angles of onboard equipment and ground receiver case of hardware and software of the system realization.Medium speed maglev train positioning speed measuring system based on induction loop is studied in this paper.At the National University of Defense Technology 204 meters speed test line,realize the real-time position of the train,and to achieve a single bogie and five car traction steering closed loop.