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Proceedings Paper

Monitoring of beam deflection subjected to bending load using Brillouin distributed optical fiber sensors
Author(s): Sang-Hoon Kim; Jung-Ju Lee; Il-Bum Kwon
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Paper Abstract

Distributed optical fiber sensors are effective in the monitoring of large structures because of their large sensing range. In this research, the methods of strain and deflection measurement for bending beams using Brillouin distributed optical fiber sensors were presented. The deflection monitoring of beams makes possible the damage detection of large structures such as bridges. The measured strain with Brillouin distributed optical fiber sensors is expressed as the averaged value within its spatial resolution. Due to the characteristic of the spatial resolution, strain near the ends of a measurement range cannot be correctly measured with respect to the measuring position. Therefore, its compensation is required. The strain measurement method suitable to the sensor characteristic was proposed, and it was verified by the analysis of aluminum-tube beams. The beam deflection could be monitored using the distributed measurement more simply and effectively than using general point-measurement.

Paper Details

Date Published: 6 August 2001
PDF: 7 pages
Proc. SPIE 4328, Smart Structures and Materials 2001: Sensory Phenomena and Measurement Instrumentation for Smart Structures and Materials, (6 August 2001); doi: 10.1117/12.435543
Show Author Affiliations
Sang-Hoon Kim, Korea Advanced Institute of Science and Technology (South Korea)
Jung-Ju Lee, Korea Advanced Institute of Science and Technology (South Korea)
Il-Bum Kwon, Korea Research Institute of Standards and Science (South Korea)


Published in SPIE Proceedings Vol. 4328:
Smart Structures and Materials 2001: Sensory Phenomena and Measurement Instrumentation for Smart Structures and Materials
Eric Udd; Daniele Inaudi, Editor(s)

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