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Track circuit for signal separation and achieving method

A track circuit and circuit technology, which is used in railway signals, railway signals and safety, transportation and packaging, etc., can solve the problems of low frequency domain separation accuracy, reduce the probability of erroneous demodulation, and improve the signal-to-noise ratio.

Inactive Publication Date: 2018-06-01
CRSC RESEARCH & DESIGN INSTITUTE GROUP CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The present invention provides a track circuit and implementation method for signal separation, which are used to solve the problem of low separation accuracy in the existing frequency domain

Method used

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  • Track circuit for signal separation and achieving method
  • Track circuit for signal separation and achieving method

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Embodiment Construction

[0023] The preferred embodiments of the present invention will be described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.

[0024] figure 1 It is a track circuit diagram for signal separation in the embodiment of the present invention. Such as figure 1 As shown, the track circuit used for signal separation in the embodiment of the present invention includes two branches in parallel: a frequency-shifting dual-channel separation branch and a pulse dual-channel separation branch, and the frequency-shifting dual-channel separation branch is used to shift the frequency The signal is separated from the input pulse frequency shift mixed signal, and the pulse dual-channel separation branch is used to separate the pulse signal from the input pulse frequency shift mixed signal.

[0025] Such as ...

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Abstract

The invention provides a track circuit for signal separation and an achieving method. The track circuit comprises a frequency shift dual-channel separation branch circuit and a pulse dual-channel separation branch circuit which are connected in parallel. The frequency shift dual-channel separation branch circuit comprises a series resonance circuit, and the pulse dual-channel separation branch circuit comprises a resistor-capacitor parallel circuit. The track circuit has the advantages that separation of two signals is performed through a method for performing simulation filtering in advance,the signal to noise ratio of signals can be greatly increased, and the probability of mistaken demodulation is greatly lowered.

Description

technical field [0001] The invention relates to the technical field of track circuit signal transmission, in particular to a track circuit for signal separation and an implementation method. Background technique [0002] With the rapid development of railway construction, track circuits have been widely used in my country as the basic safety equipment of railway signals. Track circuits are circuits composed of rails of a section of railway line as conductors, which are used to automatically and continuously detect whether a certain section of line is used by rolling stock. Occupied to ensure the safety of driving. [0003] At present, the railway circuits used in the station usually include 25Hz phase-sensitive track circuits, 480-type track circuits, high-voltage pulse track circuits and ZPW-2000A integrated track circuits. Among them, the 25Hz phase-sensitive track circuit and the 480-type track circuit can check whether the corresponding section of the rail is in an idle ...

Claims

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Application Information

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IPC IPC(8): B61L1/18
CPCB61L1/18
Inventor 乔志超任国桥刘志明李继隆韩聪颖
Owner CRSC RESEARCH & DESIGN INSTITUTE GROUP CO LTD