High-precision speed measurement positioning method and system for medium and low-speed maglev trains

Abstract

The invention discloses a high-precision speed measurement positioning method and a high-precision speed measurement positioning system for medium and low-speed maglev trains. The method comprises the following steps of: spreading metal tooth groove bars on a running track of the train, and arranging over two speed measurement positioning sensors on a train body; and cooperatively generating detection signals when the train runs and the speed measurement positioning sensors are close to the metal tooth groove bars, and judging the speed, relative position and direction of the vehicle body according to the detection signals. The system comprises the metal tooth groove bars fixed on the track, the over two speed measurement positioning sensors arranged on the train body and a signal processing unit; when the speed measurement positioning sensors are close to the metal tooth groove bars, periodic sinusoidal signals and periodic on-off signals are cooperatively generated and output to thesignal processing unit; and the signal processing unit judges the speed and the position of the train body according to the received sinusoidal signals and the received on-off signals. The system hasthe advantages of simple and compact structure, low cost, high measurement precision, convenient installation, strong anti-jamming capability and the like.

Description

technical field [0001] The invention mainly relates to the field of maglev trains, in particular to a speed measuring and positioning method and system suitable for medium and low speed maglev trains. Background technique [0002] The speed measurement and positioning system is an important part of the operation control of medium and low speed maglev trains. At present, the main methods used in the research of medium and low speed maglev trains at home and abroad include the induction loop method and the sleeper counting method. The induction loop speed measurement positioning method uses the induction loop laid on the track and the electromagnetic induction of the vehicle antenna coil for positioning, and its positioning accuracy is limited by the induction loop wiring, usually on the order of centimeters. The sleeper counting method uses sensors to count the passing sleepers to achieve the purpose of positioning and speed measurement. Due to the constraints of the sleeper...

AI Technical Summary

Problems solved by technology

The sleeper counting method uses sensors to count the passing sleepers to achieve the purpose of positioning and speed measurement. Due to the constraints of the sleeper distance, its accuracy is low

In addition, the distance between sleepers is also uneven, which leads to cumulative errors and also has an adverse effect on the speed measurement and positioning accuracy

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