Apparatus for measuring fluid flow

Details Apparatus for measuring fluid flow Apparatus for measuring fluid flow

G - Physics

01

F

73/113, 73/125,

G01F 1/32 (2006.01)

Patent

CA 1144390

G. D. Pitt - R. J. Williamson 27-4 APPARATUS FOR MEASURING FLUID FLOW ABSTRACT OF THE DISCLOSURE 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.

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