Optical Fiber Accelerometer System for Structural Dynamic Monitoring

Author

Antunes, Paulo Fernando Da Costa ; Lima, Hugo F T ; Alberto, Nélia Jordão ; Rodrigues, Hugo ; Pinto, P.M.F. ; Pinto, Pedro M F ; Nogueira, Rogerio N. ; Varum, Humberto ; Costa, Aníbal G. ; de Brito Andre, P.S.

Author_Institution

Dept. de Fis., Univ. de Aveiro, Aveiro, Portugal

Volume

9

Issue

11

fYear

2009

Firstpage

1347

Lastpage

1354

Abstract

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.

Keywords

Bragg gratings; accelerometers; bridges (structures); condition monitoring; fibre optic sensors; frequency measurement; mean square error methods; steel; vibration measurement; Portugal; Sao Pedro Creek; University of Aveiro Campus; fiber Bragg grating; optical fiber accelerometer system; root-mean-square error; size 300 m; steel footbridge; structural dynamic monitoring; structural eigenfrequency; Accelerometer; fiber Bragg grating (FBG); optical sensor; structural health monitoring (SHM);

fLanguage

English

Journal_Title

Sensors Journal, IEEE

Publisher

ieee

ISSN

1530-437X

Type

jour

DOI

10.1109/JSEN.2009.2026548

Filename

5205187