Rail travelling crane detection device

Abstract

The utility model discloses a track travelling crane detection device which comprises a magnetoelectric sensor arranged on a track and a signal processing shaping circuit composed of a signal amplification shaping chip, a modulation pulse oscillator, a pulse generator, a PNP triode and an NPN triode. The magnetoelectric sensor, the base electrode of the PNP triode and the collector electrode of the NPN triode are respectively connected with corresponding pins of the signal amplification shaping chip, the pulse signal output end of the modulation pulse oscillator is connected with the base electrode of the NPN triode, the emitter electrode of the PNP triode is connected with the power supply end of the pulse generator, and the pulse signal output end of the pulse generator outputs pulse signals. Coded pulse signals output after modulation of the magnetoelectric sensor and the modulation pulse oscillator are compared, and when the signals are consistent, the signals are judged as wheel signals, so that pulse signals are output, and the accuracy of track travelling crane detection alarm is effectively improved.

Description

Technical Field

[0001] This utility model relates to the field of track vehicle detection technology, specifically a track vehicle detection device. Background Technology

[0002] With the development of railways, safety control at railway crossings and highways, or pedestrian crossings, is of paramount importance. Installing automatic railway crossing alarms at railway crossings used by motor vehicles and pedestrians is a crucial measure to ensure traffic safety. To address this issue, the current method involves installing wheel sensors on the tracks. These sensors collect signals of approaching vehicles and issue timely alarms.

[0003] Because magnetoelectric sensors can be used in all weather conditions on railway lines with speeds of 0-350 km / h, electrified railway lines, and various other railway lines, they have extremely high anti-interference characteristics, especially stable operation on electrified lines, making them suitable for use as wheel sensors. However, track magnetoelectric sensors are highly susceptible to interference from environmental factors such as lightning, electrified railways, and radio stations, which can easily lead to false alarms. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a track vehicle detection device that compares the coded pulse signal output by the magnetoelectric sensor and the modulated pulse oscillator. When the signals are consistent, it is determined to be a wheel signal, and a pulse signal is output, which effectively improves the accuracy of track vehicle detection alarm.

[0005] The technical solution of this utility model is as follows:

[0006] A track vehicle detection device includes a magnetoelectric sensor mounted on the track and a signal processing and shaping circuit. The signal processing and shaping circuit includes a signal amplification and shaping chip, a modulation pulse oscillator, a pulse generator, a PNP transistor, and an NPN transistor. The magnetoelectric sensor is connected to the differential signal input terminal of the signal amplification and shaping chip. The pulse signal output terminal of the modulation pulse oscillator is connected to the base of the NPN transistor. The collector of the NPN transistor is connected to the reference signal input terminal of the signal amplification and shaping chip. The signal output terminal of the signal amplification and shaping chip is connected to the base of the PNP transistor. The emitter of the PNP transistor is connected to the power supply terminal of the pulse generator. The pulse signal output terminal of the pulse generator outputs a pulse signal.

[0007] The negative terminal of the pulse generator is connected to the emitter of the PNP transistor, and the positive terminal of the pulse generator is connected to the 5V power supply terminal.

[0008] The power supply terminal of the signal amplification and shaping chip and the collector of the NPN transistor are both connected to the 5V power supply terminal, and the ground terminal of the signal amplification and shaping chip, the collector of the PNP transistor, and the emitter of the NPN transistor are all grounded.

[0009] The pulse signal output terminal of the pulse generator is connected to an external controller. After receiving the pulse signal output by the pulse generator, the controller outputs an alarm signal.

[0010] The controller is equipped with a voice alarm, alarm indicator light, or buzzer to provide alarm indication.

[0011] Advantages of this utility model:

[0012] This invention incorporates a signal processing and shaping circuit. A signal amplification and shaping chip compares the electromagnetic oscillation frequency transmitted by the magnetoelectric sensor with the coded pulse signal output by the modulated pulse oscillator. When the signals match, it is determined to be a wheel signal, thus powering on the pulse generator to send a signal pulse, providing a vehicle alarm. When the signals do not match, it is determined to be an interference signal, and power is not supplied to the pulse generator, meaning the pulse generator does not output a signal pulse. This effectively avoids false alarms and significantly improves the accuracy of track vehicle detection alarms. Attached Figure Description

[0013] Figure 1 This is a circuit diagram of the signal processing and shaping circuit of this utility model. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0015] See Figure 1A track vehicle detection device includes a magnetoelectric sensor 1 mounted on the track and a signal processing and shaping circuit 2. The signal processing and shaping circuit 2 includes a signal amplification and shaping chip U1 (Hunan Xuri Intelligent Technology Co., Ltd., model XRL230), a modulation pulse oscillator U2, a pulse generator U3, a PNP transistor VT1, and an NPN transistor VT2. The magnetoelectric sensor is connected to the differential signal input terminals (pins 5 and 6) of the signal amplification and shaping chip U1. The pulse signal output terminal of the modulation pulse oscillator U2 is connected to the base of the NPN transistor VT2. The collector of the NPN transistor VT2 is connected to the reference signal input terminal (pin 3) of the signal amplification and shaping chip U1. The signal output terminal (pin 2) of the pulse generator U3 is connected to the base of the PNP transistor VT1. The negative power supply terminal of the pulse generator U3 is connected to the emitter of the PNP transistor VT1. The power supply terminal (pin 1) of the signal amplification and shaping chip U1, the collector of the NPN transistor VT2, and the positive power supply terminal of the pulse generator U3 are all connected to the 5V power supply terminal. The ground terminal (pin 4) of the signal amplification and shaping chip, the collector of the PNP transistor VT1, and the emitter of the NPN transistor VT2 are all grounded. The pulse signal output terminal of the pulse generator U3 is connected to an external controller. After receiving the pulse signal output by the pulse generator U3, the controller controls the connected voice alarm, alarm indicator light, or buzzer to output an alarm signal.

[0016] The working principle of this utility model:

[0017] The differential signal output by the magnetoelectric sensor is sent to the signal amplification and shaping chip U1. The modulated pulse oscillator U2 outputs the modulated coded pulse signal, which is then sent to the signal amplification and shaping chip U1 via the NPN transistor VT2. The signal amplification and shaping chip U1 compares the waveforms of the two signals. If they match, it is determined to be a wheel signal. The signal amplification and shaping chip U1 then outputs a low level to the base of the PNP transistor VT1, turning on the PNP transistor VT1 and energizing the pulse generator U3. The pulse generator U3 sends 10-25 pulse signals OUT-NPN to the controller. The controller receives the pulse signals and performs subsequent alarm reminder operations.

[0018] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A track vehicle detection device, characterized in that: The system includes a magnetoelectric sensor mounted on the track and a signal processing and shaping circuit. The signal processing and shaping circuit includes a signal amplification and shaping chip, a modulation pulse oscillator, a pulse generator, a PNP transistor, and an NPN transistor. The magnetoelectric sensor is connected to the differential signal input terminal of the signal amplification and shaping chip. The pulse signal output terminal of the modulation pulse oscillator is connected to the base of the NPN transistor. The collector of the NPN transistor is connected to the reference signal input terminal of the signal amplification and shaping chip. The signal output terminal of the signal amplification and shaping chip is connected to the base of the PNP transistor. The emitter of the PNP transistor is connected to the power supply terminal of the pulse generator. The pulse signal output terminal of the pulse generator outputs a pulse signal.

2. The track vehicle detection device according to claim 1, characterized in that: The negative terminal of the pulse generator is connected to the emitter of the PNP transistor, and the positive terminal of the pulse generator is connected to the 5V power supply terminal.

3. The track vehicle detection device according to claim 1, characterized in that: The power supply terminal of the signal amplification and shaping chip and the collector of the NPN transistor are both connected to the 5V power supply terminal, and the ground terminal of the signal amplification and shaping chip, the collector of the PNP transistor, and the emitter of the NPN transistor are all grounded.

4. The track vehicle detection device according to claim 1, characterized in that: The pulse signal output terminal of the pulse generator is connected to an external controller. After receiving the pulse signal output by the pulse generator, the controller outputs an alarm signal.

5. A track vehicle detection device according to claim 4, characterized in that: The controller is equipped with a voice alarm, an alarm indicator light, or a buzzer.

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