Alternating current ground potential gradient voltage signal measuring device

A gradient voltage and signal measurement technology, applied in measurement devices, measurement of current/voltage, measurement of electrical variables, etc., can solve the problems of rapid measurement, inability to AC ground potential gradient voltage signal accuracy, etc., and achieve the effect of moderate signal frequency

Pending Publication Date: 2021-11-16
SHENYANG ACAD OF INSTR SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] In order to solve the technical problem that the existing technology cannot realize accurate and fast measurement of the AC ground

Method used

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  • Alternating current ground potential gradient voltage signal measuring device
  • Alternating current ground potential gradient voltage signal measuring device
  • Alternating current ground potential gradient voltage signal measuring device

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0030] Depend on figure 1 , 2 As shown in, the power supply circuit of the AC ground potential gradient voltage signal measuring device described in the present invention includes an input voltage divider circuit; the input end of the input voltage divider circuit is connected with the output end of the measured signal, and the output end of the input voltage divider circuit is sequentially It is connected with the differential amplifier circuit, the frequency mixer circuit, the analog-to-digital conversion circuit and the single-chip microcomputer circuit; between the output end of the single-chip microcomputer circuit and the input end of the differential amplifier circuit, there is also a device for implementing two-way operational amplifiers for differential amplification and circuit gain. Gain adjustment circuit; a waveform generator circuit for setting signal frequency by the single-chip circuit is also arranged between the output end of the single-chip circuit and the i...

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Abstract

In an alternating current ground potential gradient voltage signal measuring device, the input end of an input voltage division circuit is connected with the output end of a measured signal, and the output end of the input voltage division circuit is sequentially communicated with a differential amplification circuit, a frequency mixing circuit, an analog-digital conversion circuit and a single chip microcomputer circuit; a gain adjusting circuit for realizing differential amplification and circuit gain of the two operational amplifiers is also arranged between the output end of the single chip microcomputer circuit and the input end of the differential amplification circuit; a waveform generator circuit is arranged between the output end of the single-chip microcomputer circuit and the input end of the frequency mixing circuit. The frequency mixing circuit receives signals from the waveform generator circuit at the same time, carries out frequency mixing processing in the signals, and outputs the signals after frequency mixing to the input end of the analog-digital conversion circuit. The analog-to-digital conversion circuit digitizes an input signal and outputs a digital signal to the single-chip microcomputer circuit. The single-chip microcomputer circuit can control the waveform generator circuit and the gain adjusting circuit.

Description

technical field [0001] The invention belongs to the technical field of electronic measurement, and specifically provides an AC ground potential gradient voltage signal measuring device and method, especially for measuring the AC ground potential gradient voltage signal in the cathodic protection parameters of buried steel pipelines. Background technique [0002] The alternating ground potential gradient (ACVG) voltage signal in the cathodic protection parameters of buried steel pipelines can reflect the corrosion status of pipelines to a certain extent, so its detection is an important means of safety maintenance and can prevent problems before they happen. By measuring the signal with precision instruments, it is possible to accurately find the exact location of the damaged point of the anti-corrosion layer outside the pipeline and conduct quantitative analysis on the corrosion state, so as to provide real and reliable basic data for the integrity management of the pipeline ...

Claims

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Application Information

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IPC IPC(8): G01R19/25
CPCG01R19/2503
Inventor 张军诸海博王松亭张海军常伟徐海宁袁峰何方张娜
Owner SHENYANG ACAD OF INSTR SCI
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