Measuring and testing – Volume or rate of flow – By measuring vibrations or acoustic energy
Patent
1987-06-03
1989-08-08
Goldstein, Herbert
Measuring and testing
Volume or rate of flow
By measuring vibrations or acoustic energy
73DIG4, G01F 132
Patent
active
048541770
ABSTRACT:
A piezoelectric vortex flow meter for determining the rate of fluid flow through piping including a hermetically sealed bluff body having a vortex generating plate operably associated with a sensing plate. The vortex generating plate is positioned perpendicular to the fluid flow for creating a "vortex street". A pair of piezoelectric sensors are disposed in a pair of recesses formed in the interior of the sensing plate. Sensing surfaces are formed on each side of the sensing plate adjacent the piezoelectric sensors. The sensing surfaces are formed such that the side surfaces of the sensing plate are free from any discontinuities. The vortices created by the vortex generating plate exert a force on the sensing surfaces which transmit a signal proportional to the force exerted, to the piezoelectric sensors. The piezoelectric sensors transform the mechanical energy into electrical energy readily readable with an appropriate electrical circuit.
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Barrier Ronald B.
Phipps Jackie M.
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