Apparatus for measuring the flow of a fluid flowing through a me

Details Apparatus for measuring the flow of a fluid flowing through a me Apparatus for measuring the flow of a fluid flowing through a me

1994-08-11

1995-09-19

Chilcot, Jr., Richard E.

Measuring and testing

Volume or rate of flow

By measuring electrical or magnetic properties

G01F 158

Patent

active

054507570

ABSTRACT:
An apparatus for measuring the flow of fluid through a substantially horizontal measuring tube includes coils for producing two states of a magnetic field in which the magnetic fields extend through the measuring tube in a horizontal plane. The magnetic field in a first state extends through a first horizontal plane which intersects the measuring tube in substantially the same direction on both sides of the horizontal plane and in a second state extends in substantially opposite directions on both sides of the first horizontal plane. A pair of electrodes arranged at the measuring tube senses displacement of changes in the fluid and an electrical circuit corrects the voltage Ur between the electrodes in the first state of the magnetic field by using the voltage Ug between the electrodes in the second state of the magnetic field to obtain an output signal substantially proportional to the flow of the fluid. The electrodes are located in a second horizontal plane which is offset relative to the first horizontal plane so that an unambiguous relation exists between the voltages Ug and Ur on the one hand and the flow of the fluid on the other hand. Furthermore, the relation is dependent on the flow of the fluid but independent of the flow profile of the fluid.

REFERENCES:
patent: 4137765 (1979-02-01), Matsushita

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