Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Patent
1993-06-30
1994-12-20
Nelms, David C.
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
73800, H01J 516
Patent
active
053748212
ABSTRACT:
Fiber optic sensing means for the detection and measurement of events such as dynamic loadings imposed upon elastic materials including cementitious materials, elastomers, and animal body components and/or the attrition of such elastic materials are provided. One or more optical fibers each having a deformable core and cladding formed of an elastomeric material such as silicone rubber are embedded in the elastic material. Changes in light transmission through any of the optical fibers due the deformation of the optical fiber by the application of dynamic loads such as compression, tension, or bending loadings imposed on the elastic material or by the attrition of the elastic material such as by cracking, deterioration, aggregate break-up, and muscle, tendon, or organ atrophy provide a measurement of the dynamic loadings and attrition. The fiber optic sensors can be embedded in elastomers subject to dynamic loadings and attrition such as commonly used automobiles and in shoes for determining the amount and frequency of the dynamic loadings and the extent of attrition. The fiber optic sensors are also useable in cementitious material for determining the maturation thereof.
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"Silicone Rubber Fiber Optic Sensors" by Jeffrey D. Muhs, Reprint from Jul. 1992 issue of Photonics Spectra, Laurin Publishing Co. Inc.
Capps Gary J.
Muhs Jeffrey D.
Smith David B.
White Clifford P.
Bielawski W. Mark
Larcher Earl
Marasco Joseph A.
Martin Marietta Energy Systems Inc.
Nelms David C.
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