A laser communication-based train collision avoidance system and its application method

Abstract

The invention relates to a laser-communication-based train anti-collision system and a utilization method thereof. The train anti-collision system comprises a front train and a rear train which move on a to-be-measured road segment. The train anti-collision system is characterized by further comprising an inquiring unit, a responding unit, a signal comprehensive-treatment unit, a warning unit, a laser transmitter and an uninterruptible power supply, wherein the inquiring unit is arranged at the front end of the rear train on the to-be-measured road segment, the responding unit is arranged over against the inquiring unit and is arranged at the rear end of the front train on the to-be-measured road segment, and the signal comprehensive-treatment unit is used for accurately judging and obtaining a distance value between the front train and the rear train according to a laser communication signal between the front train and the rear train, the transmission property of the laser in air and a formula that the distance is equal to the product of the speed of light and a running time. The laser-communication-based train anti-collision system is not limited by a severe environment; the utilization method is simple, convenient and reliable, is high in accuracy and efficiency; by utilizing the anti-collision system and the utilization method, and the life and property damage caused by collision accidents including tailgating or clashing and the like of the trains during track traffic control can be effectively avoided.

Description

technical field [0001] The invention belongs to the technical field of rail transit communication, and in particular relates to a train collision avoidance system based on laser communication and a using method thereof. Background technique [0002] In the management and control of modern urban rail transit, accurate driving distance measurement is an important means of driving safety. Accurately judge the distance between the front and rear vehicles, facilitate the coordinated monitoring of the driving system, arrange the departure, operation and waiting time of each vehicle, and at the same time enable the driver of the rear vehicle to fully grasp the distance between the vehicle in front and the vehicle in front, ensuring safety Under the premise, the speed of the vehicle can be flexibly selected to effectively avoid the loss of life and property caused by collisions such as rear-end collisions or collisions. [0003] The existing driving range measurement mainly adopts ...

AI Technical Summary

Problems solved by technology

Although the ATC system application technology has matured, the ATC system is affected by external environmental interference factors and the reliability and accuracy of its own ranging, and driving safety accidents still occur from time to time.

[0004] In order to overcome the deficiencies of the ATC system, there are many anti-collision methods superior to the ATC system, such as satellite positioning, image recognition, anti-collision radar, etc., but these anti-collision methods are mostly based on electromagnetic wave sensing or detection conditions Under the anti-collision mechanism, the rail trains driving in the tunnel for a long time still have not fundamentally solved the problem. Relays (such as satellites, etc.) establish uninterrupted and reliable communication; second, factors such as curvature and narrow space in the tunnel limit the effective distance of the vehicle image sensing method; third, due to the influence of internal facilities in the tunnel and space constraints , the medium and high frequency electromagnetic waves in the tunnel attenuate quickly, the echo is complex, and the driving line has up and down slopes and curves, resulting in a blind spot for detection, so electromagnetic wave radar cannot play an effective role in the tunnel

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