Track circuit for signal superposition and achieving method

Abstract

The invention discloses a track circuit for signal superposition and an achieving method. According to the method, a pulse signal superposition branch circuit and a frequency shift signal superposition branch circuit which are connected in parallel are included, the pulse signal superposition branch circuit comprises an inductor-capacitor parallel connection circuit, and the frequency shift signalsuperposition branch circuit comprises a series resonance circuit. Cab signal code sending, steel rail occupation examination under the poor branch circuit condition, broken track and broken line examination, insulation breakage examination, branch parallel connection jumper and broken line examination and other functions can be achieved, and various problems existing in the aspect of transmission security of an existing in-station track circuit are solved.

Description

technical field [0001] The invention relates to the technical field of track circuit signal transmission, in particular to a track circuit for signal superposition 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. [0004] The 25Hz phase-sensitive track circuit and the 480-type track circuit can check whether the corresponding section of the rail is in the idle...

AI Technical Summary

Problems solved by technology

[0004] The 25Hz phase-sensitive track circuit and the 480-type track circuit can check whether the corresponding section of the rail is in the idle state or occupied state, that is, check whether the corresponding section of the rail is occupied by the train when the contact between the rail and the train wheel is good, that is, under normal circumstances ; but when there is a bad shunt on the rail, the 25Hz phase-sensitive track circuit and the 480-type track circuit will lose the function of checking whether the corresponding section of the rail is idle or occupied; and the 25Hz phase-sensitive track circuit and the 480-type track circuit do not have the corresponding zone The inspection function of rail insulation damage, rail broken rail and rail lead wire disconnection, that is, when the corresponding section has insulation damage, rail broken rail and rail lead wire disconnection, the 25Hz phase-sensitive track circuit and 480 type track circuit cannot be used. The rail is occupied for maintenance; in addition, the 25Hz phase-sensitive track circuit and the 480-type track circuit do not have the function of transmitting information to the on-board equipment

However, when the rails have bad shunts or part of the branch parallel jumpers are disconnected, the ZPW-2000A integrated track circuit will lose the function of checking whether the corresponding section of the rail is idle or occupied; at the same time, the ZPW-2000A integrated track circuit will also It does not have the function of insulation damage inspection, that is, when the insulation damage occurs in the corresponding section of the rail, the ZPW-2000A integrated track circuit cannot make the corresponding section of the rail in the occupied state

[0006] The high-voltage pulse track circuit has the characteristics of high rail surface voltage and signal asymmetry. When the rail is slightly corroded and dirty, it can check whether the corresponding section of the rail is idle or occupied; however, it does not have the rail broken rail and rail lead Wiring disconnection inspection function, that is, when the corresponding section of the rail is broken or the rail lead wire is broken, the high-voltage pulse track circuit cannot keep the rail in an occupied state; at the same time, it does not have the function of transmitting information to the on-board equipment

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