Apparatus for measuring fluid flow

Details Apparatus for measuring fluid flow Apparatus for measuring fluid flow

1980-09-10

1983-02-08

Arnold, Bruce Y.

Measuring and testing

Volume or rate of flow

By measuring vibrations or acoustic energy

356133, G01F 132, G01N 2141

Patent

active

043721656

ABSTRACT:
A fluid flowmeter of the vortex shedding type. The vortex frequency is determined from variations in the internal reflectivity of a prism 16 mounted in the fluid and coupled to a light source 13 and to a detector/frequency meter 14 via an optical waveguide arrangement 15. Passage of a vortex adjacent the prism 16 causes a temporary change in the local fluid refractive index and hence a change in the intensity of light internally reflected by the prism.

REFERENCES:
patent: 2807976 (1955-10-01), Vossberg
patent: 3572117 (1971-03-01), Rodely
patent: 3732731 (1973-05-01), Fussell, Jr.
patent: 3733897 (1973-05-01), Herzl
patent: 4206642 (1980-06-01), Bearcroft
Lyle, J. H. et al., "Vortex Shedding Fluid Flowmeter Using Optical Fiber Sensor," Electronics Letters, vol. 17, No. 6, 3/19/81, pp. 244-245.

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