Metal coated fiber optic damage detection sensors with system

Details Metal coated fiber optic damage detection sensors with system Metal coated fiber optic damage detection sensors with system

1992-06-02

1993-09-14

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

73800, H01J 516

Patent

active

052451801

ABSTRACT:
Optical fiber sensor coated with linear work hardening elastic-plastic materials is provided that are used for a non-destructive optical damage detection sensor. The detection coating's intrinsic and extrinsic properties are critical on the sensor's continuous performance while being subjected to adverse environmental conditions. The damage detection sensor can also be used as an alternative to the conventional fiber fracture sensor for sensing impact damage. Other uses include maintaining a permanent record of the load/damage history of a loaded structure. A simple damage detection system is described that detects the sensor's permanent output phase-shift.

REFERENCES:
patent: 4936649 (1990-06-01), Lymer et al.
patent: 5015842 (1991-05-01), Fradenburgh et al.
patent: 5029977 (1991-07-01), Wheeler
patent: 5182449 (1993-01-01), Johnson
Dasgupta, J. S. Sirkis & C. Liu, "The Importance of Coatings to Structurally Embedded Optical Fiber Sensors", ISA Proceedings, New Orleans, LA., Oct. 1990, pp. 1673-1693.

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