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Broadband Source-Based Interrogation Scheme of Fiber Bragg Grating Sensors for Structural Health Monitoring

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Abstract:

In the present work we report on the development of a low cost interrogation system of fiber Bragg grating sensors for structural health monitoring. The developed scheme uses two gratings and a directional coupler as sensing point, and it includes self-compensation of temperature effects. The reading equipment consists of a standard photodiode for telecom applications with custom signal-conditioning electronics. The characterization of multiplexed sensors, carried out in real framework conditions, shows that the system can work in a temperature range of -20÷+40°C, making strain measurements up to at least 320με with an accuracy of ~3% and an acquisition rate of 12 samples/min. Further, a budget evaluation is drawn to asses the feasibility of our interrogation system as a low cost solution to increase the extent of structural health monitoring in funds-limited applications.

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Periodical:

Key Engineering Materials (Volume 347)

Pages:

399-404

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.347.399

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Online since:

September 2007

Authors:

Daniele Tosi, Massimo Olivero, Guido Perrone

Keywords:

Building Health Monitoring, Fiber Bragg Grating (FBG), Fiber Optic Sensor, Optical Fiber Transducers, Strain Measurement, Structural Engineering

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© 2007 Trans Tech Publications Ltd. All Rights Reserved

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