Train occupation detecting system and method

Abstract

The invention relates to a train occupancy detection system and method. The system includes: a fiber grating detection unit, used to detect the stress change of the track and process the detection signal; a safety calculation unit connected to the fiber grating detection unit, used to detect the fiber grating The detection signal processed by the unit is verified, and all calculations related to train occupancy detection are performed. The fiber grating detection unit includes a fiber grating unit and a grating modulation and demodulation unit connected with the fiber grating unit. The safety computing unit is connected to the light grid modem unit via the safety input unit. Compared with the prior art, the present invention can adapt to the complex situation on the urban rail transit line, automatically realize the safety protection of the train, greatly improve the safety of the urban rail transit operation, and has the advantages of simple installation, strong anti-electromagnetic interference ability, high sensitivity, High stability and other advantages.

Description

technical field [0001] The invention relates to a technology in the field of rail transit train operation control and safety protection, in particular to a train occupancy detection system and method. Background technique [0002] The safety of urban rail transit operations largely depends on train occupancy detection. Usually, in the urban rail transit system, the safety protection between trains (including head-on, side impact and rear-end collisions), trains and turnouts or other trackside equipment is in the signal automatic control system (Automatic Train Control) However, the safety protection of the train in the degraded mode largely depends on the detection of track occupancy. The main track occupancy detection methods in the urban rail signal system are mainly traditional track circuits and axle counting based on electromagnetic induction technology. Among them, the axle counting based on electromagnetic induction technology is suitable for harsh environments such ...

AI Technical Summary

Problems solved by technology

For example, the installation of the outdoor magnetic head part needs to be drilled on the steel rail, resulting in a complicated installation process; the detection of track occupancy depends on the electromagnetic induction of the wheel flange through the magnetic head, so it should be interfered by other electromagnetic induction; each magnetic head is active Devices require a large number of cables, resulting in high project cost, and are also easily affected by indoor power supply voltage fluctuations, which also makes the axle counting based on electromagnetic induction technology unsuitable for long sections of suburban lines, etc.

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