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Proceedings Paper

Measurements of strain distributions with a long gauge FBG sensor using optical frequency domain reflectometry
Author(s): H. Igawa; H. Murayama; T. Kasai; I. Yamaguchi; K. Kageyama; K. Ohta
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Paper Abstract

We developed a strain measurement system based on optical frequency domain reflectometry and applied it to measuring strain distributions of a specimen in tensile tests. In the sensing region on the specimen, five FBG sensors of 6 mm gauge length or one of 100 mm gauge length was bonded and strain measurements were implemented with both configurations. By using the former configuration, we could successfully carry out accurate quasi-distributed strain measurements. The later allowed fully-distributed measurements for 100 mm at the high spatial resolution. Such performance of high resolution sensing can be applied to health monitoring of a structure which may have stress concentration. In this paper, we describe the principle of the measurement system and the results in the tensile tests.

Paper Details

Date Published: 23 May 2005
PDF: 4 pages
Proc. SPIE 5855, 17th International Conference on Optical Fibre Sensors, (23 May 2005); doi: 10.1117/12.624250
Show Author Affiliations
H. Igawa, Japan Aerospace Exploration Agency (Japan)
H. Murayama, The Univ. of Tokyo (Japan)
T. Kasai, Japan Aerospace Exploration Agency (Japan)
I. Yamaguchi, Japan Aerospace Exploration Agency (Japan)
K. Kageyama, The Univ. of Tokyo (Japan)
K. Ohta, The Univ. of Tokyo (Japan)

Published in SPIE Proceedings Vol. 5855:
17th International Conference on Optical Fibre Sensors
Marc Voet; Reinhardt Willsch; Wolfgang Ecke; Julian Jones; Brian Culshaw, Editor(s)

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