Curve restoration anti-interference measuring device and method thereof

A measurement method and measurement device technology, which is applied in the field of flow and concentration measurement in the process of dredging medium transportation, can solve problems such as poor authenticity and real-time performance, and distortion of measurement results, and achieve the effects of easy handling, improved accuracy, and fast sampling speed

Pending Publication Date: 2020-12-08
CHANGJIANG WUHAN WATERWAY ENG CO
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] (2) Use software filtering to reduce the fluctuation amplitude caused by impact noise. The higher the smoothness of the fluctuation amplitude, the worse the authenticity and real-time performance of the measurement results. In many cases, the measurement results will be distorted, especially when the high flow rate, solid Working conditions with high content and large particles

Method used

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  • Curve restoration anti-interference measuring device and method thereof
  • Curve restoration anti-interference measuring device and method thereof
  • Curve restoration anti-interference measuring device and method thereof

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Embodiment 1

[0032] Such as figure 2 As shown, a curve reduction anti-interference measurement device of the present invention includes an electromagnetic flowmeter, a CPU chip, a power frequency AC excitation source, a potentiometer and a filter circuit.

[0033] The electromagnetic flowmeter is used to detect the flow information in the measurement pipeline. The electromagnetic flowmeter can be realized by using the existing technology, and this embodiment does not involve the improvement of the structure of the electromagnetic flowmeter. In this embodiment, the electromagnetic flowmeter includes an excitation coil and a pair of measuring electrodes; where the two electrodes in the pair of measuring electrodes are respectively denoted as measuring electrode S and measuring electrode P; the pair of measuring electrodes runs through the measuring pipeline and is arranged in the same direction as the fluid flow.

[0034] At present, most electromagnetic flowmeters adopt low-frequency squa...

Embodiment 2

[0042] On the basis of Embodiment 1, this embodiment provides a curve reduction anti-interference measurement method based on the device described in Embodiment 1, including the following steps:

[0043] S1. The AC excitation signal output by the power frequency AC excitation source is applied to the excitation coil of the electromagnetic flowmeter to establish a continuous alternating magnetic field, and the electromotive force is measured on the measurement electrode pair of the electromagnetic flowmeter; the two electrodes in the measurement electrode pair are respectively recorded For measuring electrode S and measuring electrode P;

[0044] S2. The measuring electrode S is connected to the two ends of the potentiometer through the wire A and the wire B respectively, and the measuring electrode P is electrically connected to the adjustment terminal of the potentiometer through the wire C, wherein the measuring electrode S, the wire A and the potentiometer constitute the fir...

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PUM

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Abstract

The invention provides a curve restoration anti-interference measuring device and method. A potentiometer is arranged, two wires are led out of a measuring electrode to be connected with the two endsof the potentiometer respectively to form two loops, and when the values of a current IA and a current IB are equal, the amplitudes of orthogonal interference signals and in-phase interference signalsare equal, so that when the phases of the quadrature interference signals and the in-phase interference signals in the currents IA and IB are opposite, the quadrature interference signals and the in-phase interference signals in the currents IA and IB can be cancelled out, and then the quadrature interference signals and the in-phase interference signals introduced by a power frequency alternating current excitation mode are eliminated.

Description

technical field [0001] The invention relates to the technical field of flow and concentration measurement during dredging medium transportation, in particular to a curve reduction anti-interference measurement device and a method thereof. Background technique [0002] At present, most domestic dredger flowmeters adopt low-frequency square wave excitation method, whose main characteristics are that it can avoid zero drift and no orthogonal interference, and has better anti-in-phase interference ability. But for the liquid-solid two-phase fluid, when the solid particles hit the electrode, the surface potential changes to form a spike-like noise, and the signal fluctuates greatly. The low-frequency square wave excitation cannot eliminate the interference caused by the impact from the hardware technology. To achieve the stability of the measurement results, it can only be eliminated by adjusting the excitation frequency and adding software. However, there are two defects: [00...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01F1/58G01F1/60G01F15/02
CPCG01F1/584G01F1/60G01F1/586G01F1/588G01F15/022
Inventor 李日新王仕辅周麒龙杜鹃张立刘丹亚张雨杜君梅
Owner CHANGJIANG WUHAN WATERWAY ENG CO
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