An Auxiliary Collision Avoidance Warning Method Based on Bilateral Two-Range Ranging

Abstract

The invention relates to an assisting anti-collision early warning method based on bilateral double-pass distance measurement, and belongs to the technical field of track traffic. The assisting anti-collision early warning method comprises the following steps that before a train travels from a train shed to a station, and after the situation that the run direction of the train is an uplink or a downlink is judged and recorded through reading a ground label, the train enters the station and starts running; the train travels in a mainline, and a driving end of a system host machine at the front end of the train sends a distance measuring request to a driven end of a system host machine of an adjacent train in a range of 800-2000m through a 2.4 G communication antenna, performs wireless data communication transmission with the driven end of the system host machine of the adjacent train, and judges distance information between the two trains; and through the judging of the own travelling state of the current train and the distance information between the trains, whether the current train sends a warning signal or not is selected. According to the assisting anti-collision early warning method disclosed by the invention, a symmetric bilateral double-pass distance measuring manner is adopted, the distance is measured through utilizing the transmission time of a signal in a journey to and from two nonsynchronous transceivers, and in the process of measuring the distance, the shake due to nonsynchronous time is offset, so that the distance measuring accuracy is greatly improved, and further high positioning accuracy is guaranteed.

Description

technical field [0001] The invention belongs to the technical field of rail transit, and in particular relates to a method for assisting collision avoidance warning. Background technique [0002] During the actual operation of the train, it is sometimes necessary to disconnect the automatic train protection system (Automatic Train Protection, ATP). At this time, the operational safety of the train is greatly reduced, and it is difficult to fully ensure the operational safety of the train only by means of traditional telephones. [0003] In the case of ATP removal, the distance between the vehicle and the preceding vehicle running in the same direction is measured in real time, and a safe distance warning is provided for the driver to ensure the safe operation of the train. Using the distance measurement scheme of the train collision avoidance auxiliary warning system, based on the linear frequency modulation spread spectrum signal technology and the symmetrical bilateral tw...

AI Technical Summary

Problems solved by technology

At this time, the operating safety of the train is greatly reduced, and it is difficult to completely ensure the operating safety of the train only by relying on traditional telephones and other methods.

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