Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Patent
1984-10-12
1987-01-13
Nelms, David C.
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
356 32, 73800, 250227, G01D 534, G01B 1116, G01L 124
Patent
active
046366385
ABSTRACT:
An apparatus is disclosed for remotely detecting cracks of sub-critical lth which originate from stress raisers in structural materials, wherein the apparatus typically comprises a source of light, a continuous length of optical fiber to conduct the light, strain responsive devices coupled to the fiber and bonded to the structural member in close proximity to the stress raisers, and a light responsive detector which is optically coupled to the fiber in order to detect breaks in the fiber induced by either tensile or shear forces eminating from cracks around the stress raisers.
REFERENCES:
patent: 4163397 (1979-08-01), Harmer
patent: 4477725 (1984-10-01), Asawa
Gause Lee W.
Huang Shih L.
Libeskind Mark
Scotese Arthur
Beers Robert F.
Hansen Henry
Nelms David C.
Oen William L.
The United States of America as represented by the Secretary of
LandOfFree
Remote optical crack sensing system including fiberoptics does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Remote optical crack sensing system including fiberoptics, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Remote optical crack sensing system including fiberoptics will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2356993