Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Patent
1996-09-09
1998-10-27
Westin, Edward P.
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
356 32, G01B 1116, G01K 1132
Patent
active
058280596
ABSTRACT:
A system and method to sense the application of transverse stress to an optical fiber which includes a light source that producing a relatively wide spectrum light beam. The light beam is reflected or transmitted off of an optical grating in the core of an optical fiber that is transversely stressed either directly or by the exposure to pressure when the fiber is bifringent so that the optical fiber responds to the pressure to transversely stress its core. When transversely stressed, the optical grating produces a reflection or transmission from the light beam that has two peaks or minimums in its frequency spectrum whose spacing and/or spread are indicative of the forces applied to the fiber. One or more detectors sense the reflection or transmissions from the optical grating to produce an output representative of the applied force. Multiple optical gratings and detectors may be employed to simultaneously measure temperature or the forces at different locations along the fiber.
REFERENCES:
patent: 4806012 (1989-02-01), Meltz et al.
patent: 4915468 (1990-04-01), Kim et al.
patent: 4996419 (1991-02-01), Morey
patent: 5319435 (1994-06-01), Melle et al.
patent: 5361130 (1994-11-01), Kersey et al.
patent: 5380995 (1995-01-01), Udd et al.
patent: 5399854 (1995-03-01), Dunphy et al.
patent: 5426297 (1995-06-01), Dunphy et al.
patent: 5493113 (1996-02-01), Dunphy et al.
patent: 5591965 (1997-01-01), Udd
patent: 5641956 (1997-06-01), Vengsarkar et al.
patent: 5646401 (1997-07-01), Udd
Wolinski, et al., "Polarimetric Fiber Optic Sensing for Smart Structures", Proc. of SPIE, vol. 2839, p. 265, 1996.
Udd, "Advanced Strain Measurement Applications of Fiber Optic Grating Sensors", Proc. of SPIE, vol. 2872, p. 18, 1996.
Craig Lawrence et al., "Multiparameter Sensing with Fiber Bragg Gratings", Proc. of SPIE, vol. 2872, p. 24, 1996.
Finch George W.
Lee John R.
Westin Edward P.
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