Motor train unit safety interlock control device

Abstract

The invention discloses a motor train unit safety interlock control device, which comprises a preliminary filter circuit, an amplitude detection circuit, an amplitude compensation circuit, a frequency comparison circuit and a self-adaptive filter circuit, and is characterized in that a capacitor C1 and a resistor R1 are utilized to form a low-pass network to enable high-frequency interference signals to fall to the ground, and a capacitor C2 and a resistor R2 are utilized to form a high-pass network to enable low-frequency interference signals to fall to the ground. An operational amplifier AR8 is used for carrying out voltage amplification on a ground transponder signal, a triode Q5 is used for carrying out current amplification on the ground transponder signal, and a parallel resonance network 1, a parallel resonance network 2 and a parallel resonance network 3 are selected for carrying out accurate frequency-selecting filtering on the ground transponder signal. The adverse effect of the Doppler effect on receiving the ground transponder signal by the vehicle-mounted transponder receiver can be reduced, so that the signal-to-noise ratio of the received ground transponder signal is improved while the vehicle-mounted transponder receiver completely receives the ground transponder signal.

Description

technical field [0001] The invention relates to the technical field of EMUs, in particular to a safety interlock control device for EMUs. Background technique [0002] In order to ensure the driving safety of the EMU and effectively use the line information for driving, the EMU needs to receive the line and speed information stored inside the ground transponder as an interlocking device during the journey in order to continue moving; Both are equipped with on-board transponder antennas. When the head of the train runs above the ground transponder, the on-board transponder antenna will send electromagnetic energy to the ground transponder, making the electronic unit inside the ground transponder start to work, and the The stored line and speed information are wirelessly transmitted to the EMU; [0003] At present, the speed of the EMUs that have been put into operation in my country is mostly above 200km / h. Due to the high speed of the EMUs, it is easy to cause the signal tr...

AI Technical Summary

Problems solved by technology

[0003] At present, the speed of the EMUs that have been put into operation in my country is mostly above 200km / h. Due to the high speed of the EMUs, it is easy to cause the signal transmitted from the ground transponder to the EMU to be affected by the Doppler effect, making the on-board transponder The center frequency of the ground transponder signal received by the receiver is not stable, so that when the vehicle-mounted transponder receiver is close to the ground transponder, the center frequency of the ground transponder signal received is higher than the center frequency of the carrier used by the ground transponder transmitter. When the vehicle-mounted transponder receiver is far away from the ground transponder, the center frequency of the ground transponder signal received is lower than the center frequency of the carrier used by the ground transponder transmitter;

[0004] For a vehicle-mounted transponder receiver with a narrow receiving bandwidth, it is easy to cause the frequency deviation of the ground transponder signal to exceed the receiving bandwidth of the vehicle-mounted transponder receiver, so that the complete ground transponder signal cannot be received, and the vehicle-mounted transponder receiver cannot receive The signal-to-noise ratio of the received ground transponder signal is greatly reduced, and even code errors occur, which reduces the accuracy of the EMU operation decision-making and seriously affects the normal operation of the EMU; for the vehicle-mounted transponder receiver with a wide receiving bandwidth, although it can The ground transponder signal is basically completely received, but it is easy to intrude into more noise or interference signals in the bandwidth range, reduce the signal-to-noise ratio of the ground transponder signal, deteriorate the communication quality between the ground transponder and the vehicle transponder, and reduce the vehicle response The accuracy of the ground transponder signal received by the transponder receiver, thereby reducing the accuracy of the operation decision of the EMU

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