Vehicle-ground communication-based train positioning system, and positioning method based on train positioning system

Abstract

Embodiments of the invention disclose a vehicle-ground communication-based train positioning system, and a positioning method based on the train positioning system, being capable of positioning the train accurately in real time. The system comprises a trackside smart antenna, wherein the trackside smart antenna comprises an array antenna, a DBF module, a receiving module, and a processing module,the array antenna is used for receiving a microwave signal sent by a vehicle antenna, converting the microwave signal into an electric signal and sending the electric signal to the DBF module and thereceiving module, the DBF module is used for calculating, according to the electric signal, an angle alpha in a latitudinal direction and an angle beta in a longitudinal direction of the microwave signal of an incident array antenna relative to an antenna receiving plane, and sending the angles to the processing module, the receiving module is used for analyzing digital information from the electric signal and sending the digital information to the processing module, and the processing module is used for converting the angle alpha and the angle beta into train position information in real time, determining the train position comprehensively according to the digital information and the train position information during receiving of the digital information, and packaging and sending a trainposition determining result and digital information to a corresponding device.

Description

technical field [0001] The embodiments of the present invention relate to the communication field, and in particular to a train positioning system based on vehicle-ground communication and a train positioning method based on the system. Background technique [0002] The train positioning technology plays an important role in the train control system. The main function of the train positioning information in the CBTC system is: in order to provide a basis for ensuring safe train intervals, the CBTC system can calculate the distance from the rear of the preceding train to each train on the line. , or the distance from the approach signal point, so as to implement effective speed control on it. [0003] At present, the train positioning technologies applied in the automatic train control system mainly include: track circuit method, query-transponder method, cross induction coil method, leaky waveguide method, leaky cable method, speed measurement and positioning method, Doppler...

AI Technical Summary

Problems solved by technology

[0004] At present, the train positioning technology has its own advantages and disadvantages. Different positioning technologies are more or less expensive, require a lot of additional equipment on the trackside, or have poor positioning accuracy, low real-time performance, or poor reliability. Currently, a variety of positioning technologies are mainly used. Positioning is carried out in the way of technology integration, and there are many trackside equipment, which is not easy to maintain

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