Fiber optic flow sensing device and method

Details Fiber optic flow sensing device and method Fiber optic flow sensing device and method

2005-02-25

2008-12-16

Alsomiri, Isam (Department: 3662)

Optics: measuring and testing

Velocity or velocity/height measuring

With light detector

C356S028000

Reexamination Certificate

active

07466399

ABSTRACT:
The invention provides an optical flow meter for measuring fluid flow through a pipe which obviates the need for the flow to be seeded with foreign particles. The meter comprises a fiber optic Sagnac interferometer with optical path crossing the flowing fluid. The interferometer measures velocity of the fluid by measuring the phase difference between the two beams propagating in the optical path in opposite directions. Light, which is deflected by the fluid, is collected by optical means at both sides of the optical path for calculation, the scintillating statistics and compensation for light intensity.

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patent: 7030970 (2006-04-01), Lin et al.
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