Vortex flow meter

Details Vortex flow meter Vortex flow meter

1993-02-26

1994-06-21

Goldstein, Herbert

Measuring and testing

Volume or rate of flow

By measuring vibrations or acoustic energy

G01F 132

Patent

active

053219902

ABSTRACT:
A sensor measures the flow velocity and/or the volumetric flow rate of a fluid flowing in a pipe and in a measuring tube mounted therein, and includes a bluff body disposed in the conduit of the measuring tube, said bluff body being designed to generate Karman vortices and having a blind hole which is in communication with the conduit via passages formed in the bluff body, a vortex sensor inserted into the blind hole and having an electrodynamic transducer responsive to the vortexinduced pressure fluctuations, said electrodynamic transducer supporting a first oscillating body being a sensor sleeve which is deflectable by the pressure fluctuations, has a first cavity sealed from the fluid, and supports a permanent magnet within the cavity, and a second oscillating body movably disposed within the cavity so as to be isolated from the pressure fluctuations and supporting at least one coil located opposite the permanent magnet.

REFERENCES:
patent: 3116639 (1964-01-01), Bird
patent: 3683691 (1972-08-01), Kivenson
patent: 3720104 (1973-03-01), Zanker
patent: 3796095 (1974-03-01), Fussell, Jr.
patent: 4005604 (1977-02-01), Herzl
patent: 4161878 (1979-07-01), Fussell, Jr.
patent: 4716770 (1988-01-01), Herzog

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