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Proceedings Paper

Characteristics of reflection-type optical fiber sensor system using one grating panel
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Paper Abstract

Optical fibers can be used as a promising sensors in smart structures thanks to their novel characteristics. In particular, its immunity to electromagnetic interference (EMI) makes the sensor suitable for use in electronic environments. In order to inspect the reliability of a structure, it is essential to characterize the dynamic responses of the structure. An accelerometer associated with optical fiber makes it possible to conduct real-time structural health monitoring under high electromagnetic environments. This paper describes an optimal design of a novel fiber optic accelerometer using one grating panel for the application to civil engineering structures. The fiber optic sensor design was optimized to have the best sensitivity to the motion of the reflective grating using two optical fibers in the quadrature. The reflected optical signal of the sensor is influenced by the reflective grating pattern and optical fiber-grating distance. In this paper, several simulations and experiments were carried out to evaluate the characteristics of the output signals according to the grating pattern and the distance between the optical fiber and the grating for a fixed fiber core diameter. Through comparison of the results between the simulations and the experiments, the optimum design of the grating-pattern was determined to obtain a stable and periodic sine wave as the output signal. Furthermore, it was demonstrated that the output signals reflected by one grating panel could be used for the final parameter-measurement.

Paper Details

Date Published: 30 March 2009
PDF: 8 pages
Proc. SPIE 7292, Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2009, 72923H (30 March 2009); doi: 10.1117/12.817003
Show Author Affiliations
Yeon-Gwan Lee, Korea Advanced Institute of Science and Technology (Korea, Republic of)
Sang-Oh Park, Korea Advanced Institute of Science and Technology (Korea, Republic of)
Dae-Hyun Kim, Seoul National Univ. of Technology (Korea, Republic of)
Byeong-Wook Jang, Korea Advanced Institute of Science and Technology (Korea, Republic of)
Chun-Gon Kim, Korea Advanced Institute of Science and Technology (Korea, Republic of)


Published in SPIE Proceedings Vol. 7292:
Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2009
Masayoshi Tomizuka, Editor(s)

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