An axle counting frequency signal detection method and circuit

A technology of frequency signal and frequency measurement, applied in the direction of frequency measurement device, frequency to amplitude conversion, etc.

Active Publication Date: 2015-10-28
MIANYANG WEIBO ELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] In view of this, the embodiment of the present application provides a method and circuit for detecting the axle counting frequency signal to solve the problems existing in the existing axle counting system

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  • An axle counting frequency signal detection method and circuit
  • An axle counting frequency signal detection method and circuit
  • An axle counting frequency signal detection method and circuit

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Embodiment 2

[0111] Figure 6 It is a structural block diagram of an axle counting frequency signal detection circuit provided in the embodiment of the present application.

[0112] Such as Figure 6 As shown, the axle counting frequency signal detection circuit includes: a voltage input circuit 10, a voltage isolation circuit 20, a first band-pass filter circuit 31, a second band-pass filter circuit 32, a third band-pass filter circuit 33, and three data processing circuit 40 and three frequency measurement circuits 50 .

[0113] The voltage input circuit 10 is connected to the detection sensor arranged at the detection site, and is used to receive the voltage signal input by the detection sensor, that is, to receive the voltage signal sent by the outdoor unit. The voltage signal received here is a coincidence signal. In the voltage signal, Contains multiple frequency signals.

[0114] The input end of the voltage isolation circuit 20 is connected to the voltage input circuit 10 for pe...

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Abstract

The application discloses a method and circuit for detecting axle counting frequency signals. The method comprises the following steps: receiving and detecting voltage signals input by a sensor; performing voltage isolation processing to the voltage signals; performing band-pass filtering with multiple different frequencies to the isolated voltage signals; performing data processing and frequency measurement to each filtering signal subjected to band-pass filtering processing so as to obtain characteristic information of three frequency signals, wherein the characteristic information comprises a value of amplitude of voltage and a frequency value. The method adopts the manner of combination of high-pass filtering and band-pass filtering to finish processing the input voltage signals, parallel processing of three frequency bands is performed to the input voltage signals through the topological structure, and the problem existing in the conventional axle counting system is solved.

Description

technical field [0001] The present application relates to the technical field of railway equipment detection, in particular to a method and circuit for detecting an axle counting frequency signal. Background technique [0002] Axle counting, also known as microcomputer axle counting, is the largest installed equipment in stations at both ends of the railway. It uses closed-loop sensors installed on the rails to monitor the number of train wheel pairs passing by. The number is sent to the other station by semi-automatic equipment. After the train arrives at the other station, the other station will automatically open the interval when the number of wheel pairs received by the other station is the same as that of the departure station. That is to say, the axle counting is a railway signal device that can detect passing wheels. Since the axle counting does not need to be installed with track insulation, this avoids sawing off the welded long rails due to the insertion of insula...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R23/06
Inventor 景小军邹琼倪伟戚继飞
Owner MIANYANG WEIBO ELECTRONICS
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