Turnout switch machine expression rod notch signal processing circuit

A signal processing circuit and a technology of representing rods, which are applied to the locking mechanism of turnouts, railway signals, railway car body parts, etc., can solve the problems of signal distortion of AD acquisition module, improve frequency stability, reduce output resistance, The effect of improving accuracy

Active Publication Date: 2019-11-26
ZHENGZHOU RAILWAY VOCATIONAL & TECH COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of the above situation, in order to overcome the defects of the prior art, the purpose of the present invention is to provide a signal processing circuit for the gap signal of the switc

Method used

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  • Turnout switch machine expression rod notch signal processing circuit
  • Turnout switch machine expression rod notch signal processing circuit
  • Turnout switch machine expression rod notch signal processing circuit

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Embodiment Construction

[0011] Regarding the aforementioned and other technical contents, features and effects of the present invention, refer to the appended Figure 1 to Figure 3 It will be apparent from the detailed description of the embodiments. The structural contents mentioned in the following embodiments are all based on the accompanying drawings of the description.

[0012] Exemplary embodiments of the present invention will be described below with reference to the accompanying drawings.

[0013] A signal processing circuit for indicating rod notch of a turnout point machine, the input buffer circuit receives the signal of the notch indicating rod of a turnout point machine detected by an eddy current sensor, in order to prevent unnecessary instantaneous high-energy pulses from being transmitted to the subsequent stage circuit, so that the instantaneous The high-energy pulse is released to the ground through the parallel transient suppression diode VD1 and the varistor R1 through the capaci...

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Abstract

The invention discloses a turnout switch machine expression rod notch signal processing circuit. An input buffering circuit receives a turnout switch machine expression rod notch signal detected by anelectric eddy current sensor. The signal is transmitted to a peak holding and conditioning circuit after being subjected to clamping and impedance matching. An amplifying circuit is adopted for amplifying frequency component of an alternating voltage signal output by an electric eddy probe under oscillation frequency of an oscillator module, wherein the amplifying circuit is formed by connectinga variable LC parallel network and an operational amplifier AR2 in series through double T networks. Later, the peak holding circuit obtains an expression rod notch peak signal and outputs the signalafter keeping the signal for a certain period of time, one way is fed back to the variable LC parallel network, resonance with the frequency component of the alternating voltage signal is achieved, the frequency stability of amplifying of the amplifying circuit is improved, the other way is compensated after being compared with the amplified signal, the amplitude stability of amplifying of the amplifying circuit is improved, after a source electrode following output circuit receives a peak holding signal, the signal is further subjected to impedance conversion through pi-type filtering and source electrode follower and then output to the controller.

Description

technical field [0001] The invention relates to the technical field of switch machines, in particular to a signal processing circuit for indicating rod gaps of a switch machine. Background technique [0002] The authorized announcement number is CN104197821B, the monitoring system for the notch width of the turnout switch machine and its eddy current sensor. The eddy current sensor uses high-frequency oscillating current to generate an alternating magnetic field through the eddy current probe, and uses the metal conductor to move to make the eddy current probe generate The magnetic field changes and is converted into current or voltage, which is rectified and filtered by the detection module, temperature compensated by the temperature compensation module, and amplified by the output buffer module to output, and an eddy current sensor that meets the actual needs (accuracy, sensitivity) is designed; The information of the notch width of the rod detected by the sensor is transm...

Claims

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Application Information

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IPC IPC(8): B61L5/10
CPCB61L5/10
Inventor 卢伟李春莹李丽兰梁宏伟占雪梅
Owner ZHENGZHOU RAILWAY VOCATIONAL & TECH COLLEGE
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