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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

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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.

Keywords:

chirped fiber Bragg gratings optical fiber sensors structural health monitoring vibration assessment

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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.