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Proceedings Paper

Investigation of a fiber specklegram sensor for structural fatigue monitoring
Author(s): Janet Sawyer; Paul B. Ruffin; Cassie M. Lofts
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Paper Abstract

An in-house laboratory independent research program was initiated at the U.S. Army Missile Command (MICOM) to develop a Fiber Specklegram Sensor (FSS) for structural monitoring of fiber optic bobbins during long-term storage. The purpose of this effort is to develop a nondestructive measurement technique to monitor the structural fatigue of the Fiber Optic Guided Missile (FOG-M) fiber optic payout bobbin. Issues associated with the fiber optic bobbin or dispenser are inter-layer stress buildup due to multi-layer winding, structural fatigue of fiber packs during long-term storage, and mechanical defects in the bobbin due to temperature fluctuations. A bulk optics FSS has been assembled, and test results quantify the FSS as a highly sensitive strain sensor. Several fibers were characterized by using compression and temperature tests to select a fiber that would provide the most sensitivity. The Corning graded index multimode 100/140 micron fiber was selected as the sensing fiber for the FSS. The sensing fiber was successfully embedded in a miniature composite bobbin.

Paper Details

Date Published: 1 May 1994
PDF: 11 pages
Proc. SPIE 2191, Smart Structures and Materials 1994: Smart Sensing, Processing, and Instrumentation, (1 May 1994); doi: 10.1117/12.173949
Show Author Affiliations
Janet Sawyer, U.S. Army Missile Command (United States)
Paul B. Ruffin, U.S. Army Missile Command (United States)
Cassie M. Lofts, U.S. Army Missile Command (United States)

Published in SPIE Proceedings Vol. 2191:
Smart Structures and Materials 1994: Smart Sensing, Processing, and Instrumentation
James S. Sirkis, Editor(s)

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