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A Differential Power Amplifying Circuit in the Driving System of Coriolis Mass Flowmeter

A technology of power amplifier circuit and mass flowmeter, which is applied in the direction of direct mass flowmeter, mass flow measurement device, measurement flow/mass flow, etc., can solve the problem of inability to increase driving energy, increase the amplitude, and improve the signal-to-noise ratio , to solve the effect of top cutting

Active Publication Date: 2018-10-02
HEFEI UNIV OF TECH
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Problems solved by technology

However, B-shaped Coriolis mass flow sensors are relatively rare at present, and in most cases, Coriolis mass flow sensors only have a single driver. In this way, for Coriolis mass flow sensors with a single driver, this method cannot increase the driving energy and becomes no longer applicable

Method used

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  • A Differential Power Amplifying Circuit in the Driving System of Coriolis Mass Flowmeter
  • A Differential Power Amplifying Circuit in the Driving System of Coriolis Mass Flowmeter
  • A Differential Power Amplifying Circuit in the Driving System of Coriolis Mass Flowmeter

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Embodiment Construction

[0027] The present invention will be further described below in conjunction with accompanying drawing.

[0028] figure 1 It is a block diagram of the circuit hardware composition of the analog drive system. The analog drive circuit consists of six parts: voltage follower, precision rectifier, gain control, multiplication amplifier, drive protection and power amplifier.

[0029] exist figure 1 Among them, the original vibration signal of the magnetoelectric speed sensor can be divided into two channels after being followed by voltage, amplified, and filtered. After the required gain, it is sent to one end of the multiplier; the other signal is directly sent to the other end of the multiplier as the waveform information required by the driving signal. In this way, the two signals containing amplitude and waveform information will output the required driving original signal after passing through the multiplier. After the original drive signal is amplified by the power of the ...

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Abstract

The invention relates to the field of flow detection, in particular to a differential type power amplifying circuit in a Coriolis mass flowmeter driving system. The differential type power amplifying circuit is modified based on a single ended power amplifying circuit in an original driving system. Under the limitation of a safety barrier circuit and supply voltage, driving energy is effectively improved, and the problem of driving energy insufficiency under the conditions of a single phase flow driving thick-tube-wall flow tube and gas-liquid two-phase flow is solved.

Description

technical field [0001] The invention relates to the field of flow detection, and is a power amplification circuit applied to a Coriolis mass flowmeter drive system, in particular to a differential type drive system applied to an analog Coriolis mass flowmeter drive system and a digital Coriolis mass flowmeter drive system. System power amplifier circuit. Background technique [0002] The Coriolis mass flowmeter is used for direct measurement of fluid mass flow, with high measurement accuracy and good repeatability, and it can also simultaneously realize the measurement of fluid volume flow, density, temperature and other parameters under different fluid conditions, and has a wide range of applications prospect. The Coriolis mass flowmeter consists of a primary instrument (or mass flow sensor) and a transmitter (or secondary instrument). The primary instrument includes a flow tube, drive coil, pickup coil (magnetic speed sensor) and temperature sensor, and the transmitter i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01F1/84
CPCG01F1/8431
Inventor 徐科军刘铮董帅方正余张建国
Owner HEFEI UNIV OF TECH
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