Electromagnetic flowmeter based on dynamic detection and detection method

Abstract

The invention provides an electromagnetic flowmeter based on dynamic detection and a detection method. The electromagnetic flowmeter comprises a power supply unit for performing exciting power supply,a sensor unit for acquiring a flow signal, an analog-digital conversion unit for conducting analog-digital conversion on the acquired signal, and a control processing unit for processing the acquiredsignal, wherein when the electromagnetic flowmeter begins to perform measurement and exciting current is at a rising stage, the control processing unit directs processes the acquired signal, the exciting current is controlled by adjusting the exciting width, and different signal intensities are obtained by selecting different exciting currents in different measurement intervals to perform dynamicmeasurement. The electromagnetic flowmeter meets the measurement requirements under different conditions, meanwhile ensures the service life, achieves the electric quantity saving purpose and inhibits interference signals to highlight measurement signals, the circuit design difficulty is remarkably reduced, the use quantity of components and devices is remarkably decreased, and accordingly the production cost is reduced.

Description

technical field [0001] The invention relates to the field of electronics, in particular to an electromagnetic flowmeter based on dynamic detection and a detection method. Background technique [0002] Electromagnetic flowmeter is an instrument that uses the principle of electromagnetic induction to measure the flow of conductive fluid based on the electromotive force induced when the conductive fluid passes through an external magnetic field. In order to ensure measurement accuracy and response speed, it must continuously provide current to the sensor to maintain a stable magnetic field to obtain a signal. , because the water market is powered by batteries, and the service life is more than four to five years, so in order to meet the power consumption requirements, the existing technology usually adopts two methods of reducing the excitation current or reducing the measurement frequency to meet the power consumption requirements . [0003] At present, manufacturers of elect...

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Problems solved by technology

However, the applicability of this method is poor, and it can only be applied to pipes with a diameter of less than 200 mm, which can only cover part of the market demand. Moreover, this new sensor has high requirements for technology, and there is no such sensor in China. A process technology that has not yet been widely promoted

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