Magnetic flowmeter determining flow rate from phase angle differ

Details Magnetic flowmeter determining flow rate from phase angle differ Magnetic flowmeter determining flow rate from phase angle differ

1993-08-23

1995-05-23

Goldstein, Herbert

Measuring and testing

Volume or rate of flow

By measuring electrical or magnetic properties

7386115, G01F 160

Patent

active

054171180

ABSTRACT:
A magnetic flowmeter provides a first alternating electrical signal with at least a portion thereof comprising a first electromotive force generated by an electromagnetic interaction between an alternating magnetic field and the velocity of an electrically conductive fluid moving transversely across the alternating magnetic field, wherein the first electromotive force varies as a function of the velocity of the electrically conductive fluid, and a second alternating electrical signal with at least a portion thereof comprising a second electromotive force generated by an electromagnetic induction from the alternating magnetic field and other ambient electromagnetic field, wherein the second electromotive force is independent of the velocity of the electrically conductive fluid, and determines the velocity of the electrically conductive fluid as a function of a phase angle difference between the first and second alternating electrical signals.

REFERENCES:
patent: 4015471 (1977-04-01), Marsh
patent: 4106337 (1978-08-01), Trietly, Jr.

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