|
 The
magnitude of the induced voltage E is directly proportional
to the velocity of the conductor V, conductor width D, and the
strength of the magnetic field B. Magnetic field coils placed
on opposite sides of the pipe generate a magnetic field. As
the conductive process liquid moves through the field with average
velocity V, electrodes sense the induced voltage. The width
of the conductor is represented by the distance between electrodes.
An insulating liner prevents the signal from shorting to the
pipe wall. The only variable in this application of Faraday's
law is the velocity of the conductive liquid V because field
strength is controlled constant and electrode spacing is fixed.
Therefore, the output voltage E is directly proportional to
liquid velocity, resulting in the linear output of a magnetic
resulting in the linear output of a magnetic flow meter
The
operating principle of magnetic flow meters is based upon Faraday's
law of electromagnetic induction,
" It states that a voltage will be induced in a conductor
moving through a magnetic field."
Faraday's Law :
E=kBDV Where
E = Induced Voltage,
B = Strength of the Magnetic Field,
D = Conductor Width,
V = Velocity of the Conductor.
|
