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Passive beacon device, system and measurement method for precise positioning of rail trains

A precise positioning and passive signal technology, applied in the direction of radio wave measurement system, positioning, measuring devices, etc., can solve the problem of decreased positioning accuracy and achieve high-precision positioning and convenient installation

Active Publication Date: 2020-08-11
合肥四相至新科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Under the condition of certain speed measurement accuracy, the positioning accuracy will decrease with the increase of accumulation time.

Method used

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  • Passive beacon device, system and measurement method for precise positioning of rail trains
  • Passive beacon device, system and measurement method for precise positioning of rail trains
  • Passive beacon device, system and measurement method for precise positioning of rail trains

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] A passive beacon device for precise positioning of rail trains, including an interrogator and m passive beacons, where m is a natural number greater than 1. The interrogator is used to send an inquiry signal to the beacon and receive a response signal sent back by the beacon; The beacon mainly accepts the interrogator's interrogation signal, processes it, and sends it back to the interrogator as a response signal.

[0050] Such as figure 2 As shown, the passive beacon includes a receiving antenna B1, a band-pass filter B, and a transmitting antenna B2 connected in sequence. The receiving antenna B1 can receive the inquiry signal transmitted by the transmitting antenna A1, and the received inquiry signal passes through the band-pass filter B is filtered and sent as a response signal through the transmitting antenna B2. The band-pass filter B of the beacon is a passive filter, and the center frequency of the band-pass filter B of different passive beacons is different, ...

Embodiment 2

[0060] This embodiment provides a passive beacon system for precise positioning of rail trains. Such as Figure 6 As shown, the passive beacon system includes a passive beacon device for precise positioning of rail trains in Embodiment 1; the application scenario of the passive beacon system in this embodiment is as follows Figure 4 As shown, wherein, the interrogator is installed on the top, side or bottom of the train head, the beacon is installed on the top, side or bottom of the train track and m beacons are respectively installed in different train running sections; when the train passes through the corresponding During beaconing, the transmitting antenna A1 of the interrogator can be directed at the receiving antenna B1 of the beacon, and the receiving antenna A2 of the interrogator can be directed at the transmitting antenna B2 of the beacon.

[0061] The center frequency of the beacon is f 0 +kΔf, the bandwidth is less than Δf, where f 0 For the initial frequency o...

Embodiment 3

[0073] In order to further illustrate the parameters of the present invention and the process of signal processing, the following specific examples of the method of entering numerical values ​​are given:

[0074] Such as figure 1 As shown, the controller A receives the information of the running interval from the train, and obtains the beacon number k=0 of this interval; the controller A configures the frequency synthesizer A according to the interval information of the train running at this time; the frequency synthesizer A generates the interval The query signal corresponding to the beacon, the signal frequency is f 0 +kΔf, in this example, the initial frequency f 0 =8GHz, frequency interval Δf=10MHz, so the frequency of the inquiry signal is 8GHz, amplified by the amplifier A, and transmitted by the transmitting antenna A1. Transmitting antenna A adopts horizontal polarization, that is, X polarization.

[0075] Such as figure 2 As shown in , the beacon installed in thi...

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Abstract

The present invention discloses a passive beacon device, passive beacon system and measurement method for rail train accurate positioning. The device comprises an interrogator and at least one passivebeacon; the interrogator comprises a frequency synthesizer A, a digital signal processor A, a transmitting antenna A1 and a receiving antenna A2; the frequency synthesizer generates different single-frequency radio frequency signals as interrogation signals and transmits the interrogation signals through the transmitting antenna A1; the passive beacons receive the interrogation signals and forward response signals; the center frequencies of the different passive beacons are different; the operating frequency of each passive beacon is corresponding to at least one single-frequency radio frequency signal; and the receiving antenna A2 receives the response signals and transmits the response signals to the digital signal processor A for calculating time when the interrogator is facing the corresponding beacon. According to the passive beacon device, passive beacon system and measurement method for rail train accurate positioning, a train speed measuring and positioning method is used in cooperation, and different beacons installed correspondingly in different intervals are selected; positioning is performed through measuring the Doppler frequency shift of the response signals of the beacons; and the measurement data of the train speed measuring and positioning method are timely compensated and corrected, and the high-precision positioning of a rail train is realized.

Description

technical field [0001] The invention relates to the field of rail transportation and positioning, in particular to a passive beacon device, system and measurement method for precise positioning of rail trains. Background technique [0002] Rail train positioning, that is, accurately obtaining the physical position of the vehicle on the track, can more effectively improve driving safety and efficiency. The main methods of existing train positioning include: track circuit positioning method, ground beacon method, cross cable loop positioning method, speed measurement positioning method. [0003] In the existing terrestrial beacon method, beacons are mainly divided into two types: active and passive. Beacons are installed in stations or along track lines such as in each track subdivision. When the train passes, the ground beacon is aligned with the corresponding equipment on the vehicle, and the vehicle equipment transmits the corresponding signal to the beacon in the form of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S5/02
Inventor 陈祝明景茂强姜琦李维铭王子晟
Owner 合肥四相至新科技有限公司
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