Train collision avoidance system based on acoustic echo detection and collision avoidance method thereof

Abstract

The invention provides a train collision avoidance system based on acoustic echo detection and a collision avoidance method thereof, relates to the technical field of track traffic and aims at solving the technical problem of the safety of a train running in a tunnel. The train collision avoidance system comprises an acoustic emission device, an acoustic receiving device and a signal control processing device. The collision avoidance method comprises the steps of utilizing an acoustic emission device to emit an acoustic detection signal to the front of the train, utilizing the acoustic receiving device to receive an echo of the acoustic detection signal reflected from the front of the train, analyzing the received echo of the acoustic detection signal, calculating the size of a front obstacle and a distance between the front obstacle and the train according to receiving-emitting time difference between the acoustic detection signal and the echo, the acoustic transmission speed and the train running speed and then judging collision risks of the train according to calculated results. The train collision avoidance system based on the acoustic echo detection and the collision avoidance method are especially suitable for application in urban metro lines.

Description

technical field [0001] The invention relates to rail transit technology, in particular to a train anti-collision system based on acoustic echo detection and an anti-collision method thereof. Background technique [0002] Once a collision accident such as rear-end collision or collision occurs in rail vehicles including urban rail transit trains, it will cause serious loss of life and property; especially when a collision accident occurs in a tunnel, the rescue and handling of the accident are extremely inconvenient and more serious. hazards and impacts of accidents. [0003] At present, most countries adopt Train Control System (TCS, or Automatic Train Control, ATC for subway lines) system to ensure the safety of train operation. In 2009, train safety accidents still occurred from time to time, especially the serious subway train collision accidents that occurred in various countries in recent years. Unfavorable factors and system defects may lead to overall or partial fai...

AI Technical Summary

Problems solved by technology

[0005] Existing train anti-collision technologies are based on electromagnetic wave sensing and detection mechanisms. The defect of this type of technology is that when the train line is in a tunnel, the anti-collision technologies based on electromagnetic wave sensing and detection mechanisms cannot be effectively utilized. For subway trains running in long-distance tunnels for a long time, its defects are especially obvious, mainly in:

[0006] 1) In tunnels, especially in long-distance tunnels, trains cannot use electromagnetic waves to directly establish communication with relays (such as satellites) outside the tunnel;

[0007] 2) Factors such as the curvature of the tunnel and the narrow space limit the effective distance of the vehicle-mounted image sensing method;

[0008] 3) Due to the influence of the internal facilities in the tunnel and the limitation of space, the medium and high frequency electromagnetic waves in the tunnel attenuate quickly and the echoes are complex, and the subway line has up and down slopes and curves, resulting in blind detection areas, so electromagnetic wave radar cannot be used effectively in the tunnel effect

[0009] It can be seen that the application effect of the existing train anti-collision technology in the tunnel is not good, especially in the non-straight long-distance tunnel, it is basically impossible to effectively improve the driving safety of the train, and it cannot well avoid the occurrence of train collision accidents. , the application effect in the subway line is poor

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