Inductive flow meter

Details Inductive flow meter Inductive flow meter

1993-09-23

1995-03-28

Chilcot, Jr., Richard E.

Measuring and testing

Volume or rate of flow

By measuring electrical or magnetic properties

7386112, G01F 100

Patent

active

054006600

ABSTRACT:
In an inductive flow meter, the magnetic field generator that generates a magnetic field within a tube, is connected to a source of alternating voltage via an electronic switch. The switch is controlled such that it becomes conductive only upon a zero crossing of the alternating voltage, respectively, and remains conductive until the next successive zero crossing of the exciting current. The useful voltage taken at the electrodes is integrated in an integrator, whereby the parasitic voltage coupled into the electrode loop by self induction becomes zero. In order to eliminate the influences of retentivity, each current pulse, at which integration is performed, is preceded by a pre-pulse.

REFERENCES:
patent: 3764895 (1973-10-01), DiMarco
patent: 4601209 (1986-07-01), Amata
patent: 4644799 (1987-02-01), Tomita
patent: 4704907 (1987-11-01), Mannherz et al.
patent: 5018391 (1991-05-01), Doll

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