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Signal processing method and system for constant magnetic electromagnetic flowmeter

An electromagnetic flowmeter and signal processing technology, which is applied in the application of electromagnetic flowmeters to detect fluid flow, volume/mass flow generated by electromagnetic effects, etc., can solve the problems of not considering the influence of flow signals and the technical complexity of fluid flow velocity values, etc.

Inactive Publication Date: 2008-11-19
李斌
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Does not consider the effect of the overall potential imbalance on the electrode on the flow signal
The technical complexity of deriving fluid flow rate values ​​directly from the electrode potential signal

Method used

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  • Signal processing method and system for constant magnetic electromagnetic flowmeter
  • Signal processing method and system for constant magnetic electromagnetic flowmeter
  • Signal processing method and system for constant magnetic electromagnetic flowmeter

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Embodiment Construction

[0036] A preferred embodiment of the present invention is as follows: see figure 1 and figure 2 .

[0037] The signal processing method of the constant magnetic electromagnetic flowmeter is to use the two electrodes of the electromagnetic flowmeter to alternately measure the period of time and the period of control, and make the electrode potential value of each control period equal to the electrode of the negative measurement period The potential measurement value is used to eliminate the polarization in the electrode potential signal, so that the fluid flow velocity value V can be obtained directly from the difference between the two electrode signals S1 and S2.

[0038] In this method, each electrode 1, 2 is connected with a switch 5, 7 and a measurement and control unit 4, 6 to realize the alternate working mode of periodically measuring and controlling each electrode, and making each The electrode potential value in the control period is equal to the measured value of ...

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Abstract

The invention supplies a constant magnetic electromagnetic flow meter signal process method and system. It adopts cycling measuring time interval and controlling interval alternation method to every electrode to make the electrode electric potential value in every control time interval be equal to the electrode electric potential value in measuring time interval. It would remove the polarization in the electrode signal and could directly gain the liquid flow rate from the difference of the two electrode electric potential signals. The invention could be used in measuring normal conductive liquid flow rate. And it has high dynamic response and low energy consumption.

Description

technical field [0001] The invention relates to a signal processing method and system of an electromagnetic flowmeter. In particular, it relates to a signal processing method and system for a constant magnetic electromagnetic flowmeter. Background technique [0002] The electromagnetic flowmeter technology applies Faraday's law of electromagnetic induction, using conductive fluid to cut the magnetic field line to generate an induced potential E=K×B×D×V that is proportional to the fluid flow velocity V, and realizes the measurement of the fluid flow velocity V by measuring the induced potential E. Among them, B is the magnetic field strength, D is the distance between the two measuring electrodes that lead to the induced potential E, and K is a determinable coefficient. [0003] At present, there are two basic forms of electromagnetic flowmeter technology: one is a constant magnetic flowmeter that uses a constant magnetic field, and the other is an electromagnetic flowmeter ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01F1/58
Inventor 李斌沈天飞
Owner 李斌