Sidetone generator flowmeter

Details Sidetone generator flowmeter Sidetone generator flowmeter

1983-11-03

1986-02-25

Goldstein, Herbert

Measuring and testing

Volume or rate of flow

By measuring vibrations or acoustic energy

G01F 120

Patent

active

045720037

ABSTRACT:
A flowmeter is provided which uses the sidetones generated in a cavity formed in the wall of a flowpipe or the like in response to fluid flowing past the cavity to provide a measure of the flow velocity of that fluid. The dimensions of the cavity are such as to provide a dominant vibratory frequency which is sensed by a pressure sensor. The flowmeter is adapted for use for a range of frequencies in which the Strouhal number is constant and under these conditions the vibratory frequency is directly related to the flow rate. The tone generator cavity and pressure transducer form a unit which is connected in-line in the flowpipe.

REFERENCES:
patent: 2936619 (1960-05-01), Gibney
patent: 3021708 (1962-02-01), November et al.
patent: 3144767 (1964-08-01), Testerman et al.
patent: 3600612 (1971-08-01), Beeken
patent: 3720104 (1973-03-01), Zaniter
patent: 3930556 (1976-01-01), Kusuda et al.
patent: 3948097 (1976-04-01), Kurita et al.
patent: 3958458 (1976-05-01), Foreman et al.
Rockwell et al. "Review-Self-Sustaining Oscillations of Flow Past Cavities" in Trans. of the ASME, vol. 100 6/78, pp. 152-165.

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