Fluid flow monitors

Details Fluid flow monitors Fluid flow monitors

1980-11-12

1982-03-09

Ruehl, Charles A.

Measuring and testing

Volume or rate of flow

By measuring vibrations or acoustic energy

G01F 132

Patent

active

043183034

ABSTRACT:
A fluid flow monitor of the sort which detects the rate of formation of Karman vortices caused by a blunt obstruction in a fluid stream. The invention mitigates problems associated with the formation of spurious electrical signals not related to the Karman vortices by providing an amplifier which amplifies frequencies selected by a comparator arrangement the comparator arrangement being controlled by the value of a further signal proportional to the number of detected Karman vortices.

REFERENCES:
patent: 2887878 (1959-05-01), Kamp et al.
patent: 3362221 (1968-01-01), Eller et al.
patent: 3709034 (1973-01-01), Herzl
patent: 3995482 (1976-12-01), Kissel

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