Rail type track circuit shunting system

Abstract

A rail type track circuit shunting system is characterized in that four axle counting pulse signals are generated by wheel detectors mounted at two ends of a track block section, for each axle counting pulse signal, each wheel is detected by two wheel detectors mounted on corresponding left and right rails, and the output axle counting pulse signal is valid only when the two wheel detectors mounted on the corresponding left and right rails detect the wheel simultaneously and output effective signals. The system automatically judges the four axle counting pulse signals and counts axles entering and leaving the track block section, and when the numbers of axles entering and leaving the track block section are equal, track block section occupying signals are enabled to be invalid automatically. Narrow pulse interference as well as dithering interference at signal edges of the axle counting pulse signals is removed by a pulse interference elimination unit through filtering, and the anti-interference capacity is further improved. The system is used for replacing the existing track shunting circuit.

Description

technical field [0001] The invention relates to a rail transit track circuit, in particular to a rail-type track circuit branching system. Background technique [0002] The track surface of the track circuit is badly shunted due to the influence of bad conductors. When a train or locomotive occupies the track, the track relay that controls the track section cannot operate normally, resulting in signal interlock failure. When the axle counting sensor solution is adopted, the mechanical sensor relies on the spring to control the on-off of the electrode contacts to generate the signal of the arrival of the train, which is prone to poor contact and signal jitter interference; the infrared rays of the infrared sensor are easily blocked by dust and debris, and are easily affected. The interference of other light produces interference pulses; the ultrasonic piezoelectric transducer cannot be effectively protected because it must be exposed, and is also susceptible to interference f...

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problem of poor branching of the existing track circuit, the present invention provides a rail-type track circuit branching system, which includes the first left wheel sensor, the first right wheel sensor, the second left wheel sensor, the second right wheel sensor, and the third left wheel sensor. Sensor, right third wheel sensor, left fourth wheel sensor, right fourth wheel sensor, first axle counting pulse unit, second axle counting pulse unit; third axle counting pulse unit, fourth axle counting pulse unit, axle counting branch unit

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