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Wheel sensor

A wheel sensor and bridge circuit technology, applied in railway car body parts, vehicle route interaction equipment, railway signal and safety, etc., can solve problems such as large environmental impact and inability to detect trains, achieve strong anti-interference ability and improve judgment. Effectiveness of accuracy, improved safety and reliability

Inactive Publication Date: 2014-02-05
HARBIN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0004] The present invention aims to solve the problem that existing wheel sensors are greatly affected by the environment and cannot detect trains running at low speeds, and further provides a wheel sensor

Method used

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Embodiment Construction

[0014] In order to clarify the characteristics and working principles of the present invention more clearly, the present invention will be described below in conjunction with the accompanying drawings and embodiments.

[0015] This specific embodiment provides a wheel sensor, including: an amplitude modulation unit, a phase unit and a signal processing unit;

[0016] The amplitude modulation unit includes a bridge circuit and two coils with the same parameters, and the bridge circuit and the two coils are arranged on the same side of the rail;

[0017] The phase unit includes a sending coil and a receiving coil, the sending and receiving coils are respectively located on both sides of the rail, the sending coil is used to generate alternating magnetic flux, and induce an AC signal of the same frequency by coupling the receiving coil;

[0018] The signal processing unit is used to generate a square wave with a frequency of 62.5kHz and provide it to the sending coil and a sine w...

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Abstract

The invention provides a wheel sensor. A corresponding amplitude modulation unit comprises a bridge circuit and two coils with the same parameters, wherein the bridge circuit and the two coils are arranged at the same side of a rail; a phase unit comprises a transmitting coil and a receiving coil which are respectively located at the two sides of the rail; the transmitting coil is used for producing alternating flux and sensing same-frequency alternating-current signals through coupling with the receiving coil; a signal processing unit is used for producing and providing square wave with preset frequency for the transmitting coil, producing and providing sine wave with preset frequency for the bridge circuit and obtaining the axle counters state of a vehicle in a region according to the output signal of the bridge circuit and the received alternating flux signals output by the coils. By using the wheel sensor, the wheel arriving and departing states can be detected, the physical center of a wheel can be accurately captured, the working state cannot be influenced by ballast bed, rail and circuit conditions, external white noise can be eliminated, and the influence on the coils, caused by high-voltage electric field, electromagnetic wave and the like nearby electrified railways can be removed.

Description

technical field [0001] The invention relates to a wheel sensor capable of detecting the number of passing axles of a train and the physical center position of a wheel, and belongs to the field of railway transportation safety monitoring and fault early warning systems. Background technique [0002] In order to ensure the safety of railway transportation production, the Transportation Bureau of the Ministry of Railways constructively proposed a train and vehicle operation safety warning system (referred to as "5T" system), which specifically includes an infrared shaft temperature detection system, a ground safety monitoring system for truck running status, and early failure of truck rolling bearings. Railside acoustic diagnosis system, dynamic image detection system for freight car running faults and passenger car running safety monitoring system. The "5T" system adopts intelligence, networking and information technology to realize dynamic detection, data centralization, remo...

Claims

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Application Information

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IPC IPC(8): B61L1/16
Inventor 卢迪林雪周三强
Owner HARBIN UNIV OF SCI & TECH
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