The working principle of the electromagnetic flowmeter, when the conductor in the electromagnetic field for laser cutting magnetic induction line fitness movement, in the conductor will cause the induction potential, the size of the induction potential and conductor in the electromagnetic field in the medium effect length and conductor in the magnetic field for vertical bisection direction fitness movement rate proportional to.Similarly, conducting hydrodynamics creates vertical azimuthal fluidity in the electromagnetic field, and laser cutting of magnetic induction lines also creates induced potential at the electrical levels on both sides of the line.The direction of the inductive potential is determined by the right hand rule, and the size of the inductive potential is determined by the above formula
Working principle and performance characteristics of electromagnetic flowmeter
Ex=BDv---- (1)
Where Ex -- induced potential, V;
B - magnetic induction intensity, T
D -- pipe diameter, m
V -- the average velocity of the liquid, m/s
However, the volume flow qv is equal to the product of the flow velocity v of the fluid and the sectional area of the pipe (D2) /4.
Qv= (D/4B) *Ex-- (2)
It can be seen from the above equation that, when the pipe diameter D is determined and the magnetic induction intensity B remains unchanged, the measured volume flow rate and the induced potential show a linear relationship.If an electrode is inserted on each side of the pipe, the induced potential Ex can be introduced, and the volume flow can be obtained by measuring the value of this potential.
As can be seen from the above equation, when the pipe diameter D is determined and the magnetic induction compressive strength B remains unchanged, the total flow of the measured volume is linearly related to the induced potential.If an electric level is inserted into each side of the pipeline, the induction potential Ex can be imported, and the measurement of this potential can be used to obtain the total volume flow.
Characteristics of electromagnetic flowmeter
The instrument panel is simple and reliable, unable to move components, and has a long working life.There is no interception resistance flow member, no working pressure damage and no hydrodynamic obstruction.No mechanical equipment inertial force, no quick response, good reliability, can be used in automatic identification, adjustment and program control system software.The measurement precision is not affected by the type of material being measured and the main parameters of the isostatic constants of temperature, viscosity, relative density and working pressure.Polytetrafluoroethylene or vulcanized rubber material lining and Hc, 316LTi and other metal electrode of different composition can be integrated into the different material must.Several types of steam flowmeters such as pipeline type and plug type are available.EEPROM memory is selected, and measurement and operation data can be stored and maintained reliably.There are two forms of integration and separation.High pixel LCD backlight display information.
The universal electromagnetic flowmeter is formulated according to Faraday's basic law of electromagnetic induction and is used to measure the total volume flow of conductive fluid mechanics.Because of its unique characteristics, it has been widely used in the measurement of various conductive liquids in industrial production.Suitable for chemical plant, paper industry, food industry, textile industry, metallurgical industry, environmental protection, water supply and drainage and other manufacturing industries.
1. Electromagnetic flowmeter is a volume total flow measurement instrument panel, which will not be harmed by the temperature, viscosity, relative density and conductivity (within a certain range) of the measured substance during the whole process of measurement.
2, the electromagnetic flowmeter has no moving components, no choke, not easy to cause work pressure damage, in addition, not easy to cause damage, blockage and other difficult problems.
3. The measuring range of electromagnetic flowmeter is wide, reaching 1:100.In addition, the electromagnetic flowmeter is only proportional to the mean water flow of the measured material, and is not related to the axisymmetric fluidity (layer, flow or flow field).
4. Electromagnetic flowmeter has no inertia force of mechanical equipment, which reflects dexterity, can measure the total flow of instantaneous velocity pulsation, and has good linear shape, so it can convert the measured data signal into standard data signal output by linear shape immediately with the converter.Ld-t type can be labeled in place, and LD type can be transmitted over long distance.