A device for transmitting a non-track circuit signal and a track circuit signal together on the same cable

Abstract

The invention relates to a device for transmitting a non-track circuit signal and a track circuit signal together on the same cable, comprising an isolator and a modulation and demodulation unit. Modulating a non-track circuit signal into a non-track circuit carrier frequency signal suitable for transmission by a track circuit signal cable and loading the non-track circuit carrier frequency signalonto the track circuit signal cable for transmission with the track circuit signal; Alternatively, the signal transmitted on the track circuit signal cable is separated into a track circuit signal and a non-track circuit carrier frequency signal, and the non-track circuit carrier frequency signal is restored as a non-track circuit signal. As the signal of the track circuit and the signal of the non-track circuit are transmit in the same cable, the non-track circuit equipment does not need to lay a signal special cable additionally, the raw material is saved, the cost is reduced, the engineering construction is reduced, and the maintenance workload in the later period is reduced. The invention realizes that the signal of the track circuit and the signal of the non-track circuit are transmitted in the same cable.

Description

technical field [0001] The invention belongs to the technical field of railway signal systems, in particular to a device for co-cable transmission of non-track circuit signals with track circuit signal cables. Background technique [0002] The rails are divided into several sections, and the train dispatcher arranges the route for the train according to the idleness or occupancy of each section, and the signal system controls the movement of the train. Usually, the railway signal system uses the track circuit to check the position of the train, judge whether the section is free or occupied, and provide driving conditions for the interlocking system. Track circuit is the key equipment in the railway signaling system and is widely used in the field of rail transportation. The track circuit includes a transmitter that generates the track circuit signal and a receiver that receives and processes the track circuit signal and outputs the idle or occupied section. The track circui...

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Problems solved by technology

[0003] Other equipment installed beside the track, such as axle counting system, monitoring system and other equipment, are collectively referred to as non-track circuit equipment. These equipment also need to use cables to connect indoor equipment and outdoor equipment signals. Currently, various non-track circuit equipment are laid separately Special cables are used to realize the signal connection of indoor and outdoor equipment. Various non-track circuit equipment are laid with special signal cables. The cost of the cables used is high and the construction is difficult. There may be mutual interference between the signal cables. The laid signal cables are maintained. In the prior art, there is a lack of a device that uses track circuit signal cables to enable signal connection between indoor and outdoor equipment of non-track circuit equipment.

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