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 -20H-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.
| Original language | English |
|---|---|
| Pages (from-to) | 399-404 |
| Number of pages | 6 |
| Journal | Key Engineering Materials |
| Volume | 347 |
| DOIs | |
| Publication status | Published - Jul 2 2007 |
| Externally published | Yes |
Keywords
- Building health monitoring
- Fiber bragg gratings (FBG)
- Fiber optic sensor (FOS)
- Optical fiber transducers
- Strain measurement
- Structural engineering
ASJC Scopus subject areas
- Materials Science(all)
- Mechanics of Materials
- Mechanical Engineering