Working principle of electromagnetic flow meter for paper pulp flow

Abstract: The information on the working principle of the electromagnetic flowmeter for paper pulp flow is provided by the excellent flowmeter and flowmeter manufacturers and quotation manufacturers. The measurement principle of electromagnetic flowmeter is based on Faraday's law of electromagnetic induction. The measuring tube of the flowmeter is a short tube of non-magnetic conductive alloy lined with insulating material. Two electrodes are fixed on the measuring tube through the tube wall along the diameter of the tube. The excitation coil is excited by bidirectional square wave pulses. For more flowmeter manufacturers to select models and price quotations, you are welcome to inquire. The following is the article details of the working principle of electromagnetic flowmeters for paper pulp flow. The measurement principle of electromagnetic flowmeter is based on Faraday's law of electromagnetic induction. The measuring tube of the flowmeter is a short tube of non-magnetic conductive alloy lined with insulating material. Two electrodes are fixed on the measuring tube through the tube wall along the diameter of the tube. When the excitation coil is excited by the bidirectional square wave pulse, a working magnetic field with a magnetic flux density of B will be generated in the direction perpendicular to the axis of the measuring tube. At this time, if the fluid with a certain conductivity flows through the measuring tube, the electromotive force E will be induced by the cutting magnetic field lines. The electromotive force E is proportional to the magnetic flux density B, and the product of the inner diameter d of the measuring tube and the average flow velocity v is measured. The electromotive force E (flow signal) is detected by the electrodes and sent to the converter through the cable. After the converter amplifies the flow signal, it can display the fluid flow, and can output pulse, analog current and other signals for flow control and regulation. E=KBdv where: E------- is the signal voltage between electrodes (v) B--------magnetic flux density (T) d--------measurement tube Inner diameter (m) v--------average flow velocity (m/s) where k and d are constants, since the excitation current is constant current, so B is also a constant, then from E=KBdv we can know that the volume flow Q is proportional to the signal voltage E-, that is, the signal voltage E induced by the flow rate is linearly related to the volume Q. Therefore, the flow rate Q can be determined as long as E is measured, which is the basic working principle of the electromagnetic flowmeter. According to E=KBdv, parameters such as temperature, density, pressure, electrical conductivity, and liquid-solid composition ratio of the liquid-solid two-phase fluid medium to be measured will not affect the measurement results. As for the flow state, as long as it conforms to axisymmetric flow (such as laminar flow or turbulent flow), it will not affect the measurement results. Therefore, the electromagnetic flowmeter is a real volume flowmeter. For manufacturers and users, the volume flow of any other conductive fluid medium can be measured without any correction as long as it is actually calibrated with ordinary water. This is an outstanding advantage of the electromagnetic flowmeter, which is not found in any other flowmeter. There are no moving and blocking parts in the measuring tube, so there is almost no pressure loss and high reliability. The above is the whole content of this article. You are welcome to inquire about the flowmeter selection and quotation of our factory. 'Working Principle of Electromagnetic Flow Meter for Paper Pulp Flow'
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