Vehicle tracking and positioning system and vehicle tracking and positioning method

Abstract

The invention discloses a vehicle tracking and positioning system and vehicle tracking and positioning method. The scheme is realized by vehicular tags, RFID (radio frequency identification) receiving terminals and auxiliary detecting and positioning devices, vehicle identification information is stored in each vehicular tag which is arranged on a vehicle, each RFID receiving terminal is controlled by one of the auxiliary detecting and positioning devices which detect states of vehicles entering a station in real time and triggers the corresponding RFID receiving terminals to receive RFID signals sent by the vehicular tags on the vehicles, and the RFID receiving terminals transmit received signals to an upper computer which judges traveling states and directions of the vehicles according to received signals and information of corresponding receiving terminals. Positions and traveling directions of subway trains can be accurately judged according to time to trigger ultrasonic / infrared / laser sensors mounted at different physical positions during traveling of the trains.

Description

technical field [0001] The invention relates to a vehicle information identification technology, in particular to a vehicle tracking and positioning system and a method based on the system. Background technique [0002] With the great development of urban rail transit, urban rail transit has been vigorously built in various places, and the subway has become an increasingly popular means of transportation. Vehicle driving safety measures and vehicle driving data information collection need to be guaranteed by the vehicle signal system. Due to the single collection of vehicle driving data, when the vehicle signal system or the train fails, the manual dispatching mode cannot accurately locate the vehicle position, so the train cannot run normally. It may lead to safety accidents such as train rear-end collisions. [0003] In response to this situation, people have proposed a vehicle status information collection system based on RFID technology, which can use RFID radio frequen...

AI Technical Summary

Problems solved by technology

However, due to the physical characteristics of the inner space of the tunnel, the serious reflection and refraction of the RFID signal, there are defects such as the inability to accurately locate the position of the vehicle and its running direction through RFID technology alone, and often give the wrong train position and running direction. Therefore, the train positioning and tracking system based on a single RFID technology cannot become an auxiliary means for locating the vehicle position during manual dispatching, but it will bring disastrous consequences

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