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Proceedings Paper

Long-gauge FBGs interrogated by DTR3 for dynamic distributed strain measurement of helicopter blade model
Author(s): M. Nishiyama; H. Igawa; T. Kasai; N. Watanabe
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Paper Abstract

In this paper, we describe characteristics of distributed strain sensing based on a Delayed Transmission/Reflection Ratiometric Reflectometry (DTR3) scheme with a long-gauge Fiber Bragg Grating (FBG), which is attractive to dynamic structural deformation monitoring such as a helicopter blade and an airplane wing. The DTR3 interrogator using the longgauge FBG has capability of detecting distributed strain with 50 cm spatial resolution in 100 Hz sampling rate. We evaluated distributed strain sensing characteristics of the long-gauge FBG attached on a 5.5 m helicopter blade model in static tests and free vibration dynamic tests.

Paper Details

Date Published: 2 June 2014
PDF: 4 pages
Proc. SPIE 9157, 23rd International Conference on Optical Fibre Sensors, 91579E (2 June 2014); doi: 10.1117/12.2059452
Show Author Affiliations
M. Nishiyama, Japan Aerospace Exploration Agency (Japan)
H. Igawa, Japan Aerospace Exploration Agency (Japan)
T. Kasai, Japan Aerospace Exploration Agency (Japan)
N. Watanabe, Tokyo Metropolitan Univ. (Japan)

Published in SPIE Proceedings Vol. 9157:
23rd International Conference on Optical Fibre Sensors
José M. López-Higuera; Julian D. C. Jones; Manuel López-Amo; José Luis Santos, Editor(s)

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