Fiber optic fuel detection system

Details Fiber optic fuel detection system Fiber optic fuel detection system

2007-08-13

2010-02-09

Font, Frank G (Department: 2883)

Optical waveguides

Optical waveguide sensor

C385S039000, C385S123000, C356S614000, C702S055000

Reexamination Certificate

active

07660494

ABSTRACT:
A method and apparatus for an optical fuel detection system. The optical fuel detection system comprises an outer tube, and inner tube, and a set of optical fibers. The outer tube has a reflective inner surface capable of reflecting light and is configured to allow a liquid fuel to enter an interior of the outer tube on which the reflective inner surface is located. The inner tube is located within the outer tube in which an area is present between the reflective inner surface. The set of optical fibers are mounted to an outer surface of the inner tube. Each optical fiber has a core that is exposed on each part of an optical fiber opposite to the reflective inner surface and the optical fiber has a refractive index that is lower that the liquid fuel but higher than a gaseous form of any gas that may enter the area.

REFERENCES:
patent: 4342919 (1982-08-01), Brogardh
patent: 5164608 (1992-11-01), Vali et al.
patent: 6801678 (2004-10-01), Murshid
patent: 7049622 (2006-05-01), Weiss
Moynihan et al., “Optoelectronic Liquid-Level Gauges for Aircraft Fuel Tanks”, NASA Tech Briefs NPO20105, Jet Propulsion Laboratory, Pasadena, California, Feb. 1999, pp. 1-2.

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