Electromagnetic flow meter

Details Electromagnetic flow meter Electromagnetic flow meter

1975-02-20

1976-03-16

Ruehl, Charles A.

Measuring and testing

Volume or rate of flow

System

G01F 158

Patent

active

039437655

ABSTRACT:
An electromagnetic flow meter comprising a circuit for generating signals proportional to the intensity of an A.C. magnetic field impressed on a fluid running through a pipe; a first switch rendered conducting for a prescribed period simultaneously with an A.C. voltage obtained in proportional to the period of the A.C. magnetic field; a second switch actuated after the conduction of the first switch; a circuit for integrating outputs corresponding to the flow rate of a fluid obtained through the first switch and further integrating said outputs with an opposite polarity; a circuit for rendering the second switch nonconducting when an output from said integration circuit reaches a referential level; and a circuit for generating an output corresponding to the period in which said outputs are integrated, for each operating cycle of said integration circuit.

REFERENCES:
patent: 2729103 (1956-01-01), Raynsford et al.
patent: 3246176 (1966-04-01), Nazareth, Jr.
patent: 3802263 (1974-04-01), Krechmery et al.

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