Current position > Product detail
『Electromagnetic flowmeter in high school physics』Related information(flow rotameter|digital flow meter|balo meter|hydraulic flow meter|volumetric meter|positive displacement meter|pitot tube flow meter|displacement meter|cfm meter|variable area flow meter|inline flow meter|differential pressure flow meter|calibrated flow meter|velocity meter|paddle wheel flow meter|oval gear flow meter|anemometer hvac|multiphase flow meter|doppler flow meter|thorpe tube flowmeter|heat flow meter)
1. Working principle of electromagnetic flowmeter
The working principle of electromagnetic flowmeter is based on Faraday electromagnetic induction principle. Specifically, the generation of induced potential: A pair of detection electrodes are installed on the tube wall perpendicular to the axis of the measuring tube and the magnetic field lines. When the conductive liquid moves along the axis of the measuring tube, it will excavate and cut the magnetic field lines, thereby generating induced potential. Detection of induced potential: This induced potential is detected by two detection electrodes. The relationship between flow velocity and induced potential: The value of induced potential is directly proportional to the flow velocity, that is, the faster the flow velocity, the greater the induced potential. In addition, the electromagnetic current vertical gauge also has the characteristic of measuring without being affected by changes in fluid density, viscosity, temperature, pressure, and conductivity, which makes it widely used in the field of fluid measurement.
2. How is the electromagnetic flowmeter calculated?
The electromagnetic flowmeter applies the principle of Faraday phenol water induction law, which states that when a conductive object cuts a magnetic wire in a magnetic field, an induced electromotive force is generated in the conductor.
. The induced electromotive force E is E=KBdV, and the flow rate Q is Q=3600 × V × S. In the equation: K - instrument coefficient B - magnetic induction intensity (T) d - electrode spacing (m) V - average fluid velocity (m/s) S - cross-sectional area inside the conduit (m2) When measuring the flow rate, the conductive liquid flows through a magnet
3. Summary and sorting of "Relevant technologies for the" qE=qVB "relationship in electromagnetic field applications" in high school physics
Summary and sorting of "Relevant technologies for the" qE=qVB "relationship in electromagnetic field applications" in high school physics
1. Principles and formulas. Schematic diagram of velocity selector: Rule formula: When particles move uniformly in a straight line in an electromagnetic field, qv? B=Eq, that is, v?=E/B. Schematic diagram of magnetohydrodynamic generator: Regular formula: After plasma injection, it is deflected by Lorentz force, causing the two plates to carry positive and negative charges. When the voltage between the two plates is U and reaches stability, is qU/d=qv? B， Is U=v? Bd. Schematic diagram of electromagnetic flowmeter: Regular formula: When U/D · q=qvB, there is v=U/DB. Then the traffic Q=vS=U/DB ·π · (D/2) 2=π DU/4B. Hall Effect Schematic: Regular Formula: Since Bqv=Eq and current I=nqSv, S=HD, we can obtain B=E/v=U/HV=nqdU/I.
2. Application Example: Application Device Description of Magnetic Fluid Generator: The magnetic fluid generator device consists of two plates, a and b, forming a pair of parallel electrodes. The distance between the two plates is d, the area of the plate plane is S, and there is a uniform mag