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Train safe-positioning method of ground device of CBTC (Communications-Based Train Control) system

A technology for ground equipment and safe positioning, which is applied in transmission systems, railway signals and safety, and transportation center control systems, etc., can solve problems such as inaccurate calculation of safe positions and complex control algorithms of ground equipment, and achieve accurate safe positions

Active Publication Date: 2012-07-11
TRAFFIC CONTROL TECH CO LTD
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0005] The technical problem to be solved by the present invention is how to overcome defects such as inaccurate safe position calculation and complex ground equipment control algorithm that exist in the existing CBTC system train positioning method

Method used

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  • Train safe-positioning method of ground device of CBTC (Communications-Based Train Control) system
  • Train safe-positioning method of ground device of CBTC (Communications-Based Train Control) system
  • Train safe-positioning method of ground device of CBTC (Communications-Based Train Control) system

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Experimental program
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Embodiment 1

[0038] Such as image 3 The most unfavorable situation of the train is shown, that is, when the train is running at point B on the line (acceleration is 0), the communication link between the on-board equipment and the ground equipment is lost. At this time, the obtained train speed is 80km / h, and the maximum Allowing a communication delay of 6s to calculate the safe position, then:

[0039] Front-end safety envelope (position) = (80000m / 3600) × (6s) + measurement error value

[0040] =22.2×6+measurement error value

[0041] ≈133m

[0042]Back-end safety envelope (position) = measurement error value + potential regression

[0043] According to the processing method of the prior art, the train arrives at point A after the train actually travels 133 meters. At this time, the ground equipment receives the position of point B sent by the on-board equipment, which is obviously very inaccurate.

[0044] The position calculated according to the...

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Abstract

The invention provides a train safe-positioning method of a ground device of a CBTC system, comprising the following steps of: S1, obtaining driving data of the current train by a vehicular device in real time; S2, respectively calculating a front-end safe envelope and a rear-end safe envelope of the train according to predetermined communication delay time (t), a measured error value, potential retreating quantity and the driving data of the current train; S3, obtaining a train safe position according to the front-end safe envelope and the rear-end safe envelope. The invention has the technical scheme that the ground device is used for actively calculating a train position in order to obtain the train safe position and does not passively use position information transmitted by the vehicular device for defending; and because the communication delay between the train and the ground is considered in real time, the safe position obtained by the ground device is more accurate.

Description

technical field [0001] The invention relates to the technical field of automatic control, in particular to a method for safely locating trains by ground ATP equipment in a communication-based train control system (CBTC system). Background technique [0002] The urban rail transit train operation control system is a key system to realize traffic command and train operation automation and improve transportation efficiency. In recent years, with the progress of science and technology, the system is gradually developing towards the communication based train control system (communication based train control-CBTC). How the ground area control equipment handles the position sent by the train is one of the key issues of the CBTC system. The current mainstream processing method is carried out according to the train positioning method of my country's CTCS3 train control system: the on-board equipment uses the information received by the ground transponder as the reference point, and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B61L25/00H04B17/00H04B17/309
CPCB61L2027/204B61L27/20
Inventor 王海峰唐涛郜春海杨旭文刘朔
Owner TRAFFIC CONTROL TECH CO LTD
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