Fluid flow velocity sensor using a piezoelectric element

Details Fluid flow velocity sensor using a piezoelectric element Fluid flow velocity sensor using a piezoelectric element

1980-12-10

1982-09-28

Ruehl, Charles A.

Measuring and testing

Volume or rate of flow

By measuring vibrations or acoustic energy

7386174, 73DIG4, 367118, G01F 128

Patent

active

043511929

ABSTRACT:
A piezoelectric, acoustic vibration detecting element is positioned in a fluid flow to be measured so as to be moved according to the intensity of the fluid flow away from a source of acoustic vibration. As the distance between the acoustic vibration source and the element increases with increasing fluid flow intensity, reducing the acoustic pressure on the element, the magnitude of an electrical output signal produced by the element decreases providing a detectable measurement of the change in the fluid flow intensity.

REFERENCES:
patent: 2935872 (1960-05-01), Misner
patent: 2985018 (1961-05-01), Williams
patent: 3140612 (1964-07-01), Houghton et al.
patent: 3452594 (1969-07-01), Dale
patent: 3508623 (1970-04-01), Greenstein
patent: 3857277 (1974-12-01), Moore
patent: 3955415 (1976-05-01), Sharon

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