Data communication and positioning-speed-measuring combined system based on asymmetic structure inductive loop

Abstract

The invention discloses a data communication and position detection composite system based on asymmetric structure induction ring, which includes terrestrial communication and position detection units, automotive communication and position detection units, cables laid on the center of tracks, transmitting antennas, receiving antennas and position detection antennas that are installed facing the cable between tracks under vehicle body. The terrestrial communication and positioning detection unit connects the cable between tracks, and the automotive communication and positioning unit respectively connects the transmitting antenna, receiving antenna and position detection antenna. The cable between tracks includes the first and second cable, the first cable is laid vertically along the track center, the second cable crosses with the first one at a certain distance interval, and the first one is set curved section on each crossing.

Description

technical field [0001] The invention mainly relates to the technical field of data communication, positioning and speed measurement, in particular to a data communication, positioning and speed measurement composite system based on an induction loop with an asymmetric structure. Background technique [0002] At present, in the rail transit, how to locate and measure the speed of the car, and how to solve the communication between the car and the ground have become the key problems to be solved in the rail transit technology. Taking the maglev train as an example, in order to ensure the normal operation of the maglev train, it is necessary to design a communication and positioning speed measurement system that meets the operation requirements of the maglev train. For ordinary wheel-rail railways, the vehicle-ground communication is mainly realized through the track circuit, and the structure of the positioning, speed measurement and communication system is too complicated. T...

AI Technical Summary

Problems solved by technology

The parallel long wire induction loop method has no anti-interference treatment on the line structure, so the system as a whole is easily affected by external electromagnetic interference, and the anti-interference ability is poor, especially not conducive to long-distance applications.

The cross induction loop mode reduces external interference to a certain extent, but the system has communication blind spots, and multiple antennas must be used alternately to achieve continuous communication

Multiple antennas add complexity to the system, and it is easy to make communication errors when switching antennas

The improved cross-inductive loop method adopts the signal phase shifting method to eliminate the communication dead zone, but because it performs phase shifting operation on the sending and receiving signals, it further increases the complexity of the system, and the phase shifting operation makes useful signals mixed with shifting signals. phase noise, reducing the reliability of the communication

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