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Title: Impurity-doped optical shock, detonation and damage location sensor

A shock, detonation, and damage location sensor providing continuous fiber-optic means of measuring shock speed and damage location, and could be designed through proper cabling to have virtually any desired crush pressure. The sensor has one or a plurality of parallel multimode optical fibers, or a singlemode fiber core, surrounded by an elongated cladding, doped along their entire length with impurities to fluoresce in response to light at a different wavelength entering one end of the fiber(s). The length of a fiber would be continuously shorted as it is progressively destroyed by a shock wave traveling parallel to its axis. The resulting backscattered and shifted light would eventually enter a detector and be converted into a proportional electrical signals which would be evaluated to determine shock velocity and damage location. The corresponding reduction in output, because of the shortening of the optical fibers, is used as it is received to determine the velocity and position of the shock front as a function of time. As a damage location sensor the sensor fiber cracks along with the structure to which it is mounted. The size of the resulting drop in detector output is indicative of the location of the crack. 8more » figs.« less
Inventors:
Issue Date:
OSTI Identifier:
6597409
Assignee:
Dept. of Energy, Washington, DC (United States) SNL; EDB-95-037779
Patent Number(s):
US 5387791; A
Application Number:
PPN: US 8-083223
Contract Number:
AC04-76DP00789
Resource Relation:
Patent File Date: 29 Jun 1993
Country of Publication:
United States
Language:
English
Subject:
47 OTHER INSTRUMENTATION; MEASURING INSTRUMENTS; DESIGN; SHOCK WAVES; MEASURING METHODS; DAMAGE; OPTICAL EQUIPMENT; OPTICAL FIBERS; VISIBLE RADIATION; ELECTROMAGNETIC RADIATION; EQUIPMENT; FIBERS; RADIATIONS 440600* -- Optical Instrumentation-- (1990-)

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