Next Article in Journal
Frequency Noise Suppression of a Single Mode Laser with an Unbalanced Fiber Interferometer for Subnanometer Interferometry
Next Article in Special Issue
An X-Band Radar System for Bathymetry and Wave Field Analysis in a Harbour Area
Previous Article in Journal
A Speedy Cardiovascular Diseases Classifier Using Multiple Criteria Decision Analysis
Previous Article in Special Issue
Palladium on Plastic Substrates for Plasmonic Devices
Article Menu

Export Article

Open AccessArticle
Sensors 2015, 15(1), 1321-1341; doi:10.3390/s150101321

Development and Experimental Validation of a Numerical Tool for Structural Health and Usage Monitoring Systems Based on Chirped Grating Sensors

Department of Aerospace Science and Technology, Politecnico di Milano, 20156 Milan, Italy
*
Author to whom correspondence should be addressed.
Received: 3 November 2014 / Accepted: 5 January 2015 / Published: 12 January 2015
(This article belongs to the Special Issue State-of-the-Art Sensors Technology in Italy 2014)
View Full-Text   |   Download PDF [7504 KB, uploaded 12 January 2015]   |  

Abstract

The interest of the aerospace industries in structural health and usage monitoring systems is continuously increasing. Among the techniques available in literature those based on Fibre Bragg Grating sensors are much promising thanks to their peculiarities. Different Chirped Bragg Grating sensor configurations have been investigated in this paper. Starting from a numerical model capable of simulating the spectral response of a grating subjected to a generic strain profile (direct problem), a new code has been developed, allowing strain reconstruction from the experimental validation of the program, carried out through different loading cases applied on a chirped grating. The wavelength of the reflection spectrum for a chirped FBG has a one-to-one correspondence to the position along the gauge section, thus allowing strain reconstruction over the entire sensor length. Tests conducted on chirped FBGs also evidenced their potential for SHM applications, if coupled with appropriate numerical strain reconstructions tools. Finally, a new class of sensors—Draw Tower Grating arrays—has been studied. These sensors are applicable to distributed sensing and load reconstruction over large structures, thanks to their greater length. Three configurations have been evaluated, having different spatial and spectral characteristics, in order to explore possible applications of such sensors to SHM systems. View Full-Text
Keywords: structural health monitoring; Chirped Fibre Bragg Gratings; Draw Tower Grating Array; strain reconstruction structural health monitoring; Chirped Fibre Bragg Gratings; Draw Tower Grating Array; strain reconstruction
Figures

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

Scifeed alert for new publications

Never miss any articles matching your research from any publisher
  • Get alerts for new papers matching your research
  • Find out the new papers from selected authors
  • Updated daily for 49'000+ journals and 6000+ publishers
  • Define your Scifeed now

SciFeed Share & Cite This Article

MDPI and ACS Style

Bettini, P.; Guerreschi, E.; Sala, G. Development and Experimental Validation of a Numerical Tool for Structural Health and Usage Monitoring Systems Based on Chirped Grating Sensors. Sensors 2015, 15, 1321-1341.

Show more citation formats Show less citations formats

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Sensors EISSN 1424-8220 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top