Measuring and testing – Volume or rate of flow – By measuring vibrations or acoustic energy
Patent
1990-12-31
1992-07-07
Goldstein, Herbert
Measuring and testing
Volume or rate of flow
By measuring vibrations or acoustic energy
G01F 132
Patent
active
051272733
ABSTRACT:
A vortex generator-sensor comprises a vortex generating bluff body disposed across a flow passage and a pressure sensing planar member disposed within a planar cavity included in the bluff body in a pivotable arrangement about a torsion axis disposed at the midsection of the pressure sensing planar member in a parallel relationship thereto, wherein alternating fluid pressure difference between the two opposite sides of the bluff body associated with the vortex shedding from the bluff body is introduced to the two opposite halves of the pressure sensing planar member by a plurality of pressure communicating holes in such a way that the alternating fluid pressure difference creates a torsional movement of the pressure sensing planar member about the torsion axis, which is converted to an alternating electrical signal by a transducer connected to the pressure sensing planr member.
REFERENCES:
patent: 1935445 (1933-11-01), Heinz
patent: 4181020 (1980-01-01), Herzl
patent: 4803870 (1989-02-01), Lew
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