Phase-sensitive track circuit intelligent receiver and signal processing method

Abstract

The invention relates to a phase-sensitive track circuit intelligent receiver and a signal processing method. The phase-sensitive track circuit intelligent receiver comprises a signal input unit, an anti-aliasing filtering unit, a digital signal processing unit, a dynamic security AND gate and a module switch power supply, wherein the signal input unit, the anti-aliasing filtering unit, the signal processing unit and the dynamic security AND gate are sequentially connected. The phase-sensitive track circuit intelligent receiver and the signal processing method have the advantages that on the premise of completely realizing the functions of a two-element two-position relay and a microelectronic phase-sensitive track receiver, the mutant function is added for solving the problem of defective shunting; the track circuit state, the receiving equipment state, track signals, local signals, electrification interference signals and coding interference signals are monitored; and the use by field repair personnel is convenient.

Description

technical field [0001] The invention relates to the technical field of rail transit, in particular to a phase-sensitive rail circuit intelligent receiver and a signal processing method. Background technique [0002] The 25Hz phase-sensitive track circuit was developed in imitation of the Soviet Union according to the Ministry of Railways (78) Tiejizi No. 1422 document. Since it was put on the road in Shijiazhuang III and IV fields in 1980, it has worked stably and reliably, and has been promoted and used throughout the road. Due to the proper selection of the parameters of the equipment, the 25Hz phase-sensitive track circuit has reliable adjustment, branching and broken rail inspection within the range allowed by the technical conditions. The receiver is the receiving device of the 25Hz phase-sensitive track circuit. It is responsible for monitoring the adjustment and branching of the track circuit. The early receiving device used a binary two-position relay, and it was fo...

AI Technical Summary

Problems solved by technology

Although these renovation measures alleviated the "red light band" phenomenon to a certain extent, they caused a serious mismatch between the characteristic impedance of the track circuit and the load impedance on the other hand, and the residual voltage of the shunt circuit of the track circuit became higher. Poor road phenomenon, that is, the receiving equipment cannot detect the occupancy information of the track circuit by the train

Poor track circuit shunting is likely to cause safety accidents such as train derailment and rear-end collision, and affect the efficiency of railway operation

In addition, with the continuous increase of railway operating mileage, the maintenance work of track circuit equipment is becoming increasingly heavy

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