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Static and Dynamic Multiparameter Assessment of Structural Elements Using Chirped Fiber Bragg Gratings
Leandro Macedo1, Edson A Souza1, Anselmo Frizera1
1Graduate Program in Electrical Engineering, Federal University of Espírito Santo, Vitoria 29075-910, Espírito Santo, Brazil.
Sensors (Basel, Switzerland)
|February 28, 2023
Summary
Chirped Fiber Bragg Gratings (CFBGs) enable simultaneous static and dynamic structural health assessment. This novel sensor accurately measures force and strain distribution, offering a potential resolution of 0.25 N.
Area of Science:
- Optical Engineering
- Materials Science
- Structural Health Monitoring
Background:
- Chirped Fiber Bragg Gratings (CFBGs) are advanced optical sensors.
- Accurate structural health monitoring requires versatile sensing capabilities.
Purpose of the Study:
- To develop and analyze CFBGs for simultaneous static and dynamic measurements.
- To assess the feasibility of CFBGs for structural health assessment of beams.
Main Methods:
- Numerical analysis using the finite-element method (FEM) for static and dynamic beam behavior.
- Experimental evaluation of CFBG sensors under static loading and dynamic excitation.
- Analysis of wavelength shift and Full-Width at Half-Maximum (FWHM) for strain and force assessment.
Main Results:
- CFBGs accurately determined force and strain distribution with determination coefficients > 0.99.
- A force resolution of 0.25 N was achieved.
- Dynamic tests confirmed frequency detection at excited frequencies.
- Simultaneous measurement of static and dynamic parameters was demonstrated.
Conclusions:
- CFBG sensors are suitable for structural health assessment.
- The proposed device enables simultaneous measurement of multiple parameters.
- Multiplexing capabilities allow integration for complete shape reconstruction.
