Temperature characteristics of FBG sensors with different coatings for High Temperature Superconductor Application

Liu, Yanchao; Fang, Jin; Jia, Dongyu; Li, Wenlong

doi:10.1109/cieec47146.2019.cieec-2019551

Cited by 5 publications

(1 citation statement)

References 8 publications

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“…They found that coated sensors had a sensitivity of 48 pm/ • C, ten times higher than uncoated FBGSs. Metallic coatings such as gold and silver have demonstrated a marked improvement in sensor sensitivity to high-temperature gradients, with a delay response of 300 ms compared to bare sensors [52]. It is also worth mentioning that Weisbrich et al's study [53] on shrinkage tests, which analyzed the influence of output signals on distributed FBGSs (Rayleigh type) in concrete structures, used the same coatings studied in the present work.…”

Section: Of 16mentioning

confidence: 88%

Fiber Bragg Gratings Sensor Strain–Optic Behavior with Different Polymeric Coatings Subjected to Transverse Strain

González-Gallego,

Terroba Ramírez,

Martínez-Vicente

et al. 2024

Polymers

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This research work is based on a previous study by the authors that characterized the behavior of FBG sensors with a polyimide coating in a structural monitoring system. Sensors applied to structural health monitoring are affected by the presence of simultaneous multidirectional strains. The previous study observed the influence of the transverse strain (εy) while keeping the longitudinal strain constant (εx), where the x direction is the direction of the optical fiber. The present study develops an experimental methodology consisting of a biaxial test plan on cruciform specimens with three embedded FBG sensors coated with polyimide, acrylate, and ORMOCER®. Applying the Strain–Optic Theory as a reference, a comparison of the experimental values obtained with the different coatings was studied. This experimental work made it possible to study the influence of the transverse strain (εy) on the longitudinal measurements of each FBGS and the influence of the coating material. Finally, the calibration procedure was defined as well as K (strain sensitivity factor) for each sensor.

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Section: Of 16mentioning

confidence: 88%