Measuring and testing – Volume or rate of flow – By measuring vibrations or acoustic energy
Patent
1991-10-08
1993-06-01
Goldstein, Herbert
Measuring and testing
Volume or rate of flow
By measuring vibrations or acoustic energy
G01F 132
Patent
active
052149650
ABSTRACT:
A vortex flowmeter comprises a vortex generating bluff body disposed across a flow passage, and a transducer including a sealed cavity divided into three compartments by a pair of diaphragms and a relative motion sensor detecting relative lateral deflections of the pair of diaphragms away from and towards one another, wherein the middle compartment intermediate the pair of diaphragms includes a pressure communicating hole open to one cylindrical side of the bluff body, while the two side compartments straddling the middle compartment includes a pressure communicating hole open to the other cylindrical side of the bluff body; wherein the fluctuating pressure associated with vortex shedding from the bluff body creates pulsating relative lateral deflections of the pair of diaphragms, that generates an alternating electrical signal representing vortex shedding from the bluff body from the relative motion sensor.
REFERENCES:
patent: 4062238 (1977-12-01), Herzl
patent: 4161878 (1979-07-01), Fussell, Jr.
patent: 4212209 (1980-07-01), Newbold et al.
patent: 4257277 (1981-03-01), Klobe
patent: 4440027 (1984-04-01), Focht
patent: 4475405 (1984-10-01), Corpron
patent: 4879909 (1989-11-01), Lew
patent: 4891988 (1990-01-01), Tada
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