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A rail transit train line fitting and positioning method based on RFID ground beacons

A technology for rail transit trains and ground beacons, applied in the field of rail transit train positioning and control, can solve the problems of complex system hardness and structure, and achieve the effect of improving positioning accuracy and reducing the number of layings

Inactive Publication Date: 2019-01-08
JINAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the system hardness structure is complex, and a good data fusion algorithm is also required

Method used

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  • A rail transit train line fitting and positioning method based on RFID ground beacons
  • A rail transit train line fitting and positioning method based on RFID ground beacons
  • A rail transit train line fitting and positioning method based on RFID ground beacons

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Embodiment

[0025] Train positioning is a key technology in rail traffic control system. Accurate and real-time acquisition of train position information is the basis of rail traffic control. This embodiment discloses a rail transit train line fitting method based on RFID ground beacons, in order to form a ground beacon-satellite positioning-dead reckoning combined train positioning system to realize "small grouping and high density" of rail transit trains The driving organization mode provides technical support.

[0026] The technology of the present invention includes: 1) a rail transit train line fitting system structure based on RFID ground beacons; 2) a dead reckoning algorithm; 3) a positioning system data structure.

[0027] System structure such as figure 1 .

[0028] The ground beacon is installed on the sleeper in the center of the two rails of the train track. The ground beacon reading and writing terminal is installed at the corresponding position at the bottom of the train...

Embodiment 2

[0054] The ground beacon (RFID tag) in the embodiment of the present invention: Shenzhen Jietong Technology JT-305 ultra-high frequency long anti-metal passive RFID electronic tag is used, which supports EPC Global C1Gen2 and ISO18000-6C protocols, and the working frequency is 860-960MHz; Read and write sensitivity -17dBm, tag chip: AlienH3; 96-bit EPC code, 512-bit user data area. The data storage time is 10 years, and the number of rewritable times: 100,000 times. Reading distance: 5M (with JT-8280 reader).

[0055] In the embodiment of the present invention, the ground beacon reading and writing terminal: adopts Shenzhen Jietong Technology JT-8280A ultra-high frequency RFID reader, supports ISO18000-6C (EPC G2) protocol, operating frequency 902-928MHz, communication interface Wiegand26\34\ 42. RJ45, RS232 data interface, stable working distance 5M. Power requirements DC-7.5-12V, 3A.

[0056] In the embodiment of the present invention, the wireless communication interface ...

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Abstract

The invention discloses an RFID ground beacon based route fitting positioning method of a rail transit train. The method comprises the following steps: sending an EPC code to a read-write terminal of a vehicle-mounted ground beacon through a passive ground beacon; sending the EPC code to a computer of a ground monitoring center system of the rail transit train through a vehicle-mounted positioning system; searching a positioning database copy through the vehicle-mounted positioning system using the EPC code as an index; performing fitting positioning on adjacent ground beacons through the vehicle-mounted positioning system based on the route fitting parameters provided by the positioning database; searching the positioning database through the rail transit train ground monitoring center system using the EPC code as the index; and then performing fitting positioning on adjacent ground beacons through the rail transit train ground monitoring center system according to the route fitting parameters provided by the positioning database. With the adoption of the method, the hardware structure and algorithm of an existing train track reckoning system are simplified; the quantity of paved ground beacons is decreased. Therefore, the positioning accuracy is improved, and as a result, the system reliability is improved.

Description

technical field [0001] The invention relates to the technical field of rail transit train positioning and control, in particular to a fitting and positioning method for rail transit trains based on RFID (Radio Frequency Identification--radio frequency identification) ground beacons Background technique [0002] Train positioning is a key technology in the rail traffic control system. Accurate and real-time acquisition of train position information is the basis of the rail traffic control system. Train positioning based on ground beacons is a positioning method widely used in rail transit at present. The ground beacon installed on the central sleepers of the two rails is activated when the train passes and receives the power carrier sent by the on-board interrogator, and sends the physical location information of the ground beacon to the on-board interrogator, realizing the on-board positioning system and rail transit trains The ground monitoring center locates and tracks th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B61L25/02
CPCB61L25/026
Inventor 王博
Owner JINAN UNIVERSITY
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