Method and device for judging running direction of train based on satellite positioning

Abstract

The invention provides a method and device for judging the running direction of a train based on satellite positioning. The method comprises the steps of enabling on-board equipment ATP to receive satellite data through a satellite receiver, and carry out the matching operation with an electronic map; executing a satellite positioning algorithm of an unknown orbit, and then carrying out train orbit judgment; after the orbit is successfully judged, executing a satellite positioning algorithm of a known orbit, and judging the running direction of the train; and after the running direction of thetrain is judged successfully, completing initial positioning of the train. Aiming at line characteristics, the invention designs the method for judging the running direction of the train based on satellite positioning according to the vehicle-mounted electronic map, so that the train can finish initial positioning of the train in a railway line interval, and the running efficiency of the train isimproved.

Description

technical field [0001] The invention belongs to the field of train control, in particular to a method and device for determining the running direction of a train based on satellite positioning. Background technique [0002] The Qinghai-Tibet Railway (Xining-Lhasa) is located in the high-altitude area of ​​Northwest my country, and the natural conditions along the line are harsh. The trackside equipment is easily affected by natural disasters such as wind, sand, rain and snow. Not only the maintenance personnel have a greater maintenance risk, but also the maintenance cost is relatively high. . The Qinghai-Tibet Railway used the ITCS system of General Motors to realize train operation in the early stage (it expires in 2024). In order to realize independence as soon as possible, realize the construction of the CTCS system system, and the interconnection of the road network, it is necessary to develop a new train control system to replace the original one. ITCS system. Except ...

AI Technical Summary

Problems solved by technology

Except for special cases, there is basically no physical balise arrangement in the railway line section. Relying on the physical balise to complete the initial positioning of the train will greatly affect the efficiency of train operation

For example, the existing scheme 1 (journal paper "Research on a Method for Initial Positioning of Trains Based on Satellite Navigation", "Railway Communication Signals" 2020 No. 3, Han Gaitang, etc.) discloses that the pre-matching method is determined by comparing distances. Although the orbit sheet improves the efficiency of initial positioning, there will be more pre-matched orbit sheet errors when the distance between the front and rear orbit sheets is large and the satellite positioning point is set near the junction of the two orbit sheets.

In addition, it only judges the position of the track, and does not judge the direction of the train.

Existing scheme 2 (conference paper "Research on the Application of Satellite Positioning Technology in Lightweight Train Control System", the 10th China Satellite Navigation Academic Conference in 2019, Guo Huazhen, etc.) discloses a track determination process, which requires the driver to confirm the operation , and then combined with the design of the electronic map, the judgment of the train running direction is made according to the front and rear sections of the satellite positioning, and there are restrictions on the size of the section and the distance interval

Images