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Signal amplification treatment method of electromagnetic flow meter

An electromagnetic flowmeter and signal amplification technology, which is used in the application of electromagnetic flowmeters to detect fluid flow, volume/mass flow generated by electromagnetic effects, and measure flow/mass flow to enhance analysis and processing capabilities, eliminate zero-point drift interference, and improve The effect of measurement accuracy

Inactive Publication Date: 2006-01-11
SHANGHAI UNIV
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Problems solved by technology

However, it uses feedback amplification processing on the signal during the positive modulation or negative modulation time period. For the electromagnetic flowmeter signal amplification processing, it does not use the zero excitation process of the electromagnetic flowmeter to eliminate the zero drift. It is not conducive to providing more time to amplify, acquire and process the signal during the positive and negative rectangular excitation time

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  • Signal amplification treatment method of electromagnetic flow meter
  • Signal amplification treatment method of electromagnetic flow meter
  • Signal amplification treatment method of electromagnetic flow meter

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Embodiment Construction

[0013] A preferred embodiment of the present invention is as follows: see figure 1 , figure 2 and image 3 .

[0014] A method for amplifying and processing signals of an electromagnetic flowmeter, the sensor 1, the excitation controller 2 and the impedance converter 3 make the magnetic field B of the sensor 1 = 0 in the T0-T3 period according to the T0-T10 beat sequence T generated by the timing controller 7, Make the magnetic field B of the sensor 1 positive (or negative) in the period of T3-T6, make the magnetic field B of the sensor 1 = 0 in the period of T6-T7, make the magnetic field B of the sensor 1 be negative (or positive) in the period of T7-T10, The sensor 1 outputs the signal S0 to the impedance converter 3, and the impedance converter 3 outputs the signal S1, which is characterized in that the feedback structure composed of the difference amplifier 4 and the baseline adjuster 6 adjusts the baseline of the signal S1 according to the time sequence T in the perio...

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Abstract

The present invention relates to an electromagnetic flowmeter signal amplification processing method. Said method adopts the following steps: under a zero-excitation process of sensor it makes baseline feedback regulation, and then in the following positive and negative rectangular wave excitation time quantum makes the signal undego the processes of undistored effective amplification, acquisition and processing so as to implement accurate measurement.

Description

technical field [0001] The invention relates to a signal amplification processing method of an electromagnetic flowmeter. technical background [0002] Modern electromagnetic flow uses positive and negative square wave modulation to excite the sensor to generate the corresponding flow induced potential, so that the flow signal output by the sensor can eliminate the polarization phenomenon and provide a steady-state flow signal. In practice, the flow signal output by the sensor also has interference problems such as low signal-to-noise ratio and large zero drift. Patent ZL99113868.6 provides an effective method to dynamically eliminate zero-point drift interference and accurately amplify signals for signal processing under positive and negative rectangular wave modulation. However, it adopts feedback amplification processing of the signal under the positive modulation or negative modulation time period. For the electromagnetic flowmeter signal amplification processing, it do...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01F1/60G01F1/58
Inventor 李斌曹金亮史骥
Owner SHANGHAI UNIV
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