Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Patent
1983-07-29
1986-04-08
Nelms, David C.
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
350 961, H01J 516
Patent
active
045815275
ABSTRACT:
A damage assessment system consisting of a three-dimensional grid of opti fibers for locating and assessing damage in plastic composite structures. A optical fiber grid system is implanted in a composite structure during its fabrication and becomes integrated with it. The optical fiber grid experiences an identical load/damage condition as the structure itself. Using a system of interrogation based on optoelectronics, passage or continuity of light throughout the system can be monitored for light attenuation or interruption. Highly stressed fibers would attenuate light while broken fibers would interrupt or hinder light transmission. By monitoring a number of optical fiber ends, the extent of damage in three dimensions can be determined.
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Crane Roger M.
Macander Aleksander B.
Beers Robert F.
Marsh Luther A.
Maxwell Roger L.
Nelms David C.
The United States of America as represented by the Secretary of
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