Track frequency-shift signal detection system based on HMC1001 magnetoresistance sensor

Abstract

The invention provides a track frequency-shift signal detection system based on an HMC1001 magnetoresistance sensor, which comprises a frequency-shift signal collecting system, a signal core processing system, a data real-time display system and an upper computer communication system, wherein the frequency-shift signal collecting system is used for collecting a frequency-shift signal, and specifically comprises a magnetoresistance sensor peripheral circuit, an HMC1001 magnetoresistance sensor, a probe, a protection circuit, a signal conditioning circuit and an A / D (analog-digital) converter. The track frequency-shift signal detection system adopts the anisotropic HMC1001 magnetoresistance sensor to replace the traditional clamp current transformer, and realizes detection for a frequency-shift current signal on the track in a non-contact mode, thereby improving the working efficiency of a communication and signaling section in detecting and maintaining frequency-shift equipment. Meanwhile, the test system is small in size, convenient to carry and suitable for field work, and has excellent anti-interference performance.

Description

Technical field [0001] The invention relates to the technical field of early warning systems, in particular to a track frequency shift signal detection system based on an HMC1001 magnetoresistive sensor. Background technique [0002] Since the "Eleventh Five-Year Plan" proposed to accelerate the development of railways and urban transportation, China has gradually entered the era of high-speed rail. The emergence of high-speed rail has accelerated the flow of railway passenger and freight transportation, improved the overall efficiency of railway transportation, and contributed to my country's economic development. Social progress has contributed new power. However, the gradual increase in the operating speed of high-speed railway trains and the continuous increase in the density of trains have also put forward higher requirements for the railway department on train control and dispatch. The track circuit is a very important part of the railway transportation system, and it is re...

AI Technical Summary

Problems solved by technology

[0003] At present, the CD96 series frequency shifting meter commonly used in the electric service section uses a clamp current transformer. When measuring the signal, the detected object needs to be placed in the center of the meter clamp. When performing equipment debugging and daily maintenance in the station, a special lead-out is required. Line position detection, this detection method slows down the work efficiency of the detection personnel to a certain extent

Moreover, most of the current frequency-shifting meters have a single function, do not have the function of communicating with other equipment, and cannot collect the detection results to the railway computer system in time, and cannot quickly, accurately and conveniently detect the characteristic parameters of the track frequency-shifting signal, and thus cannot do To find out the frequency shifting equipment failure in time, and maintain the stable operation of the frequency shifting equipment in time

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