Share Email Print
cover

Proceedings Paper

Impact monitoring in smart composites using stabilization-controlled FBG sensor system
Author(s): Hyung-Joon Bang; Sang-Wuk Park; Dae-Hyun Kim; Chang-Sun Hong; Chun-Gon Kim
Format Member Price Non-Member Price
PDF $14.40 $18.00
cover GOOD NEWS! Your organization subscribes to the SPIE Digital Library. You may be able to download this paper for free. Check Access

Paper Abstract

Impact location monitoring is one of the major concerns of the smart health monitoring. For this application, multipoint ultrasonic sensors are to be employed. In this study, a multiplexed FBG sensor system with wide dynamic range was proposed and stabilization controlling system was also developed for the maintenance of maximum sensitivity of sensors. For the intensity demodulation system of FBG sensors, Fabry-Perot tunable filter (FP-TF) with 23.8 nm FSR (free spectral range) was used, which behaves as two separate filters between 1530 ~ 1560 nm range. Two FBG sensors were attached on the bottom side of the graphite/epoxy composite beam specimen, and low velocity impact tests were performed to detect the one-dimensional impact locations. Impact locations were calculated by the arrival time differences of the impact longitudinal waves acquired by the two FBGs. As a result, multiplexed in-line FBG sensors could detect the moment of impact precisely and found the impact locations with the average error of 1.32 mm.

Paper Details

Date Published: 27 July 2004
PDF: 8 pages
Proc. SPIE 5384, Smart Structures and Materials 2004: Smart Sensor Technology and Measurement Systems, (27 July 2004); doi: 10.1117/12.539681
Show Author Affiliations
Hyung-Joon Bang, Korea Advanced Institute of Science and Technology (South Korea)
Sang-Wuk Park, Korea Advanced Institute of Science and Technology (South Korea)
Dae-Hyun Kim, Korea Advanced Institute of Science and Technology (South Korea)
Chang-Sun Hong, Korea Advanced Institute of Science and Technology (South Korea)
Chun-Gon Kim, Korea Advanced Institute of Science and Technology (South Korea)


Published in SPIE Proceedings Vol. 5384:
Smart Structures and Materials 2004: Smart Sensor Technology and Measurement Systems
Eric Udd; Daniele Inaudi, Editor(s)

© SPIE. Terms of Use
Back to Top