RFID (radio frequency identification devices)-assisted subway train position detecting and accurate parking system

Abstract

The invention discloses a RFID (radio frequency identification devices)-assisted subway train position detecting and accurate parking system which can be used for timely correcting the position detection result of the existing rail transit train. The system comprises a vehicle-mounted reader-writer, a radio frequency antenna, a plurality of ground electronic labels, a train information processing unit and a background main system, wherein the vehicle-mounted reader-writer is arranged at the head of a subway train and is connected with the train information processing unit; the radio frequency antenna is arranged at the center of the bottom at the head of the train and is arranged right above the center line of a track; and the ground electronic labels with different spacing distances are arranged on the center line of the track. After the invention is used, the real-time detection of the subway train position and the accurate parking of the train can be realized, the length of a station can be effectively shortened due to an accurate train parking technology, therefore, the investment cost can be saved, the system can be furthest matched with a screen door of a station, so as to convenient for a passenger to get on and off, and meet the trip comfortableness requirement of the passenger.

Description

technical field [0001] The invention relates to an automatic detection system for subway trains in place, especially suitable for real-time on-line detection of train positions in urban rail transit and precise parking of trains at stations. Background technique [0002] In urban rail transit, the real-time detection of the train position is an important prerequisite for realizing the synchronization of train and station information. The precise positioning of the train can not only ensure the safety of the vehicle, but also meet the large number of departures and departures faced by the development of the subway system in the future. The time interval is short and there are many train lines. At the same time, in order to ensure the safety of passengers waiting for the train, screen door facilities have been generally installed on subway platforms. When the train enters and exits the station, the screen door is automatically opened and closed. The limitation of the door open...

AI Technical Summary

Problems solved by technology

[0003] The simplest existing train positioning method is the on-board coded odometer, which uses the instrument installed on the train to directly calculate the running speed and the distance traveled by the train from the rotation speed and the number of cycles of the wheel, but in practical applications However, due to the idling and skidding of the wheels when the train starts, brakes, and goes up and down slopes, it is necessary to use a certain method to correct the distance measurement error of the on-board odometer; the use of track circuits to detect train positions has been widely used in China's railways. Widely used, the basic principle is to use the two rails of the defined track section as conductors, install insulators on the rail joints at both ends, install power transmission equipment at one end, and install power receiving equipment at the other end. When the track is occupied by trains, The low current sent by the power transmitting end is short-circuited by the train, and the relay at the power receiving end is demagnetized, and then the occupancy of the track can be judged. The starting point and end point of each track are used as the synchronous reference point of the train position, which acts as a beacon for ground position positioning , this detection method has a lot of trackside equipment, which is limited by the limit length of rails, traction backflow, and track circuits, and it is difficult to meet the precise parking requirements of trains; in addition, axle counting equipment, loop-type detection equipment, etc. are obtained in train position detection. The former is a product of the 1930s. This method is not limited by track conditions and limit lengths, but it cannot realize the transmission of vehicle-ground information. The latter appeared in the 1970s. This method of trackside equipment Less, it can transmit vehicle-ground two-way communication information, but it is limited by the limit length, and the laying of the ring line is more complicated

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