Optical Fiber Accelerometer System for Structural Dynamic Monitoring

In this study, the implementation of an optical accelerometer unit based on fiber Bragg gratings, suitable to monitor structures with frequencies up to 45 Hz, is reported. The developed optical system was used to estimate the structure eigenfrequencies of a steel footbridge, with a total length of 3...

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Bibliographic Details
Published in:	IEEE sensors journal Vol. 9; no. 11; pp. 1347 - 1354
Main Authors:	da Costa Antunes, P.F., Lima, H.F.T., Alberto, N.J., Rodrigues, H., Pinto, P.M.F., de Lemos Pinto, J., Nogueira, R.N., Varum, H., Costa, A.G., de Brito Andre, P.S.
Format:	Journal Article
Language:	English
Published:	New York IEEE 01-11-2009 The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects:	Accelerometer Accelerometers Aerodynamics Bragg gratings Dynamical systems Dynamics Estimates fiber Bragg grating (FBG) Fiber gratings Frequency Monitoring Monitors Optical fibers Optical network units optical sensor Optical sensors Sensor phenomena and characterization structural health monitoring (SHM) Structural steels
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Summary:	In this study, the implementation of an optical accelerometer unit based on fiber Bragg gratings, suitable to monitor structures with frequencies up to 45 Hz, is reported. The developed optical system was used to estimate the structure eigenfrequencies of a steel footbridge, with a total length of 300 m, over the Sao Pedro Creek, located at University of Aveiro Campus, in Portugal. The acceleration records measured with this solution are compared with those obtained by traditional commercial electronic devices, revealing a root-mean-square error of 2.53 times 10 -5 G.
Bibliography:	ObjectType-Article-2 SourceType-Scholarly Journals-1 ObjectType-Feature-1 content type line 23
ISSN:	1530-437X 1558-1748
DOI:	10.1109/JSEN.2009.2026548