High-Order Fiber Bragg Grating Corrosion Sensor Based on the Detection of a Local Surface Expansion

This paper presents a fiber optic sensor for the detection of corrosion processes that occur on metal surfaces. In the proposed sensor design, a sensing fiber with an inscribed high-order Bragg grating is attached to the observed metal surface. A broadening of high-order Bragg grating spectral chara...

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Bibliographic Details
Published in:Structural control and health monitoring 2023-07, Vol.2023, p.1-14
Main Authors: Budinski, Vedran, Njegovec, Matej, Pevec, Simon, Macuh, Boris, Donlagic, Denis
Format: Article
Language:English
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Summary:This paper presents a fiber optic sensor for the detection of corrosion processes that occur on metal surfaces. In the proposed sensor design, a sensing fiber with an inscribed high-order Bragg grating is attached to the observed metal surface. A broadening of high-order Bragg grating spectral characteristics is observed and used to detect small and highly localized longitudinal strain variations that occur along the fiber as a result of corrosive rust flakes’ formations beneath the sensing fiber. The proposed approach provides a straightforward fabrication method, the possibility for unobtrusive mounting, including mounting of the sensor beneath the corrosion-protective layers, and consistent corrosion detection yields.
ISSN:1545-2255
1545-2263
DOI:10.1155/2023/9972511