Rail Transit Train Positioning Method

Abstract

The invention discloses a rail transit train positioning method, which comprises the following steps: (1) arranging a beacon database and a turnout database; (2) setting the initial positioning state of a train as non-positioning; (3) enabling the train to begin to run from the initial poisoning state, and naming a beacon as an initial beacon after any one effective beacon is read on the way of running; (4) looking up the initial beacon position of the beacon database, taking the initial beacon as a criterion, searching all adjacent beacons to a forward direction and a reverse direction through the beacon database or the turnout database, and recording the adjacent beacons as expected beacons; (5) enabling the train to continuously run along a station track, comparing a second beacon with all expected beacons when the second beacon is read, wherein if the second beacon is matched with one of the expected beacons, the positioning is successful, and if the second beacon is not matched with one of the expected beacons, the positioning is failed; taking the second beacon as the initial beacon again, and returning back to the step (4) for continuously calculating. Across-turnout positioning can be realized, thus improving the positioning efficiency and improving the repositioning efficiency.

Description

technical field [0001] The invention relates to the field of rail transit, in particular to a method for positioning a rail transit train. Background technique [0002] In the field of rail transit automatic operation and automatic protection technology, the train positioning method is one of the first technologies that must be considered and solved. [0003] Train positioning, that is, the train obtains the current position of the train and the direction relative to the running of the track according to the pre-arranged beacons on the track. Before the train enters official operation, it needs to obtain its own position through the beacon. [0004] Relocation, that is, the process of obtaining the position of the train again after the train reads the beacon, but cannot obtain the position of the train because the beacon does not meet the requirements. [0005] When obtaining the position, the train is required to pass two consecutive positioning beacons, and the train can...

AI Technical Summary

Problems solved by technology

[0017] Since the existing positioning method requires that there should be no switch between the initial beacon and the adjacent beacon, and the switch is an indispensable facility for the rail transit line, when the vehicle moves across the switch, the position cannot be established, and the established position is reduced s efficiency

[0018] In the existing method, if the location cannot be established after reading the second beacon, all beacon information including the second beacon will be discarded, resulting in the need to re-search the initial beacon during the train relocation process, and the relocation efficiency Low

[0019] In the prior art, such as the Chinese patent application titled "Metro Train Positioning Method Based on RSSI" and application number 201110250340.6, and the Chinese patent application titled "Train Positioning Method Based on Railway Mobile Communication Network Communication Base Station" and application number 201310477121.0 Application, the use of wireless or mobile base stations to obtain the train position, the error is relatively large, and there are high requirements for the layout of wireless base stations or mobile base stations, and it is not convenient for existing lines to be reconstructed

[0020] In the prior art, for example, the Chinese patent application titled "A Stationary Train Locating Method Applicable to CBTC System" and application number 201210495948.X uses wireless signal field strength for positioning, which is inconvenient for the transformation of existing lines. For wireless The layout of the base station has high requirements, and it is only for stationary vehicles, so the application is narrow

[0021] In the prior art, such as the Chinese patent application titled "A Train Positioning Method and System" with application number 201310633649.2 and the Chinese patent application titled "Train Positioning Method Applicable to Different Blocking Systems" with application number 200710024560.0, Obtaining the position of the train by way of the track circuit can only obtain the position of the train in a certain section, and cannot know the exact position of the train

[0022] In the prior art, such as the Chinese patent application titled "A Method and System for Train Positioning" and application number 201310127510.0, the direction of movement of the vehicle relative to the track cannot be obtained due to only one beacon and position acquisition, and has not solved the problem. The problem of positioning when crossing a turnout

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