High dynamic range, temperature compensated fibre Bragg gratings sensor for structural monitoring of buildings

Smeu, E., Gnewuch, H., Jackson, David A., Podoleanu, Adrian G.H. (2006) High dynamic range, temperature compensated fibre Bragg gratings sensor for structural monitoring of buildings. In: SPIE Proceedings Series. 6345. Spie-Int Soc Optical Engineering ISBN 0-8194-6421-X. (doi:10.1117/12.693086) (The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided)

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Official URL
http://dx.doi.org/10.1117/12.693086

Abstract

The distance changes between structural elements inside a building (e.g. walls, pillars, stairs, etc.) ought to be monitored, especially in seismic-prone areas, in order to assess its stability. Fibre Bragg grating (FBG) sensors are now the most interesting choice for this purpose, since several gratings can be included in the fibre, resulting in a quasi-distributed sensor, which can be illuminated using a single light source and interrogated simply by a single optical spectrum analyzer (OSA), using wavelength multiplexing. The paper deals with such a sensor, which was installed for monitoring the distance changes in a construction joint between two building blocks inside the University "Politehnica" of Bucharest. Since this city is placed in a seismic-prone area, we use a fast scanning OSA, so that the dynamic behavior of the monitored construction joint is expected to be captured during future earthquakes. Slow drifts of the construction joint width will be also monitored. The paper describes the sensor structure and working principle, the experimental tests and main parameters evaluation. The reported sensor is temperature compensated. It has an estimated distance resolution better or equal to 10 μm, and a linearity of +0.2%...-0.35% for displacements up to 0.55 mm. Simulated dynamic tests are also reported.

Item Type: Conference or workshop item (Proceeding)
DOI/Identification number: 10.1117/12.693086
Uncontrolled keywords: Dynamic tests, FBG, Linearity, Resolution, Sensitivity, Strain, Structural monitoring, Temperature compensation, Buildings, Condition monitoring, Earthquakes, Fiber Bragg gratings, Sensitivity analysis, Strain, Dynamic tests, Linearity, Optical spectrum analyzer (OSA), Resolution, Structural monitoring, Temperature compensation, Optical sensors
Subjects: Q Science > QC Physics
T Technology > TA Engineering (General). Civil engineering (General) > TA1520 Optical Engineering
Divisions: Faculties > Sciences > School of Physical Sciences > Applied Optics Group
Depositing User: Giles Tarver
Date Deposited: 24 Jul 2015 14:48 UTC
Last Modified: 29 May 2019 14:54 UTC
Resource URI: https://kar.kent.ac.uk/id/eprint/49749 (The current URI for this page, for reference purposes)
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