Train positioning method and system based on two-dimensional code recognition

Abstract

The embodiment of the invention provides a train positioning method and system based on two-dimensional code recognition. The method comprises the following steps that firstly, a current image frame taken by a camera shooting device on a train is acquired, and an identification number and a first position information carried by a two-dimensional code region in the current image frame is identified; then, based on the identification number, the theoretical position information corresponding to the identification number is determined, and if it is judged that the first position information is consistent with the theoretical position information, the second position information of the center point of the two-dimensional code region in the current image frame is determined; and finally, the current position information of the train is determined based on the first position information, the second position information and the preset distance model. According to the train positioning method,less ground equipment is needed for realizing the method, only two-dimensional code identification cards arranged on the train running track need to be arranged, the equipment cost and the installation and maintenance cost of the ground equipment are reduced, the two-dimensional code identification card does not need to be powered, energy can be saved, and the front and back sides of the two-dimensional code identification card can both position the train.

Description

technical field [0001] The present invention relates to the technical field of train operation control, and more specifically, to a train positioning method and system based on two-dimensional code identification. Background technique [0002] With the rapid development of cities, the development of urban public transport systems with rail transit as the backbone has become one of the effective means to solve urban traffic problems; To improve the driving safety, it is necessary to obtain the location information of the running trains in the rail transit. [0003] At present, urban rail transit train positioning mostly uses track circuits, Global Navigation Satellite System (Global Navigation Satellite System, GNSS), vehicle-mounted autonomous positioning and ground transponder-assisted correction to realize continuous positioning of trains. Among them, the positioning method of vehicle-mounted autonomous positioning plus ground transponder-assisted correction is the most w...

AI Technical Summary

Problems solved by technology

[0004] However, no matter which of the above-mentioned positioning methods, there is the problem of inaccurate positioning of the train due to its own nature limitations. The layout and maintenance cost are high. If the number of transponders is insufficient, the accurate positioning of the train cannot be carried out, that is, the requirements of economy and accuracy cannot be met at the same time; the positioning method of the track circuit can only determine that the train is in a certain interval. Unable to perform more precise positioning; the positioning method using GNSS has high requirements on the terrain, and can only be applied on the Qinghai-Tibet line with less obstacles, for example, and cannot be accurately positioned in the city

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