A hybrid fiber optic sensing system for structural health monitoring

Ghorai, S.K.; Sengupta, S.; Sidhishwari, Soumya; Roy, Dilip

doi:10.1109/icsens.2010.5689938

Cited by 1 publication

(2 citation statements)

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“…The other branch guided the signal through a linear polarizer that converted the variations of the SOP into power level changes. This arrangement is a simplified version of that proposed in several publications [11][12][13], since it exploits a low-cost, standard single mode fiber as a sensing element instead of a highly birefringent fiber. This choice reduces the cost and eases the splicing as well as the entire assembly.…”

Section: Polarimetric Sensing Systemmentioning

confidence: 99%

“…A first demonstration of exploitation of the polarization as a means to measure strain dates back to the eighties [11]; in that case a highly birefringent fiber was used as a sensing device. In a recent study [12] a hybrid sensor consisting of a FBG and a highly birefringent fiber were used to simultaneously measure pointlike and distributed strain, in order to overcome the inherent limitation of gratings to implement a fully distributed sensing system. A wide-ranging review on PS working principle and applications can be found in [13].…”

Section: Introductionmentioning

confidence: 99%

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Comparative Study of Fiber Bragg Gratings and Fiber Polarimetric Sensors for Structural Health Monitoring of Carbon Composites

Olivero

Perrone

Vallan

et al. 2014

Advances in Optical Technologies

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A comparative study is presented between Bragg grating (FBG) and polarimetric sensors (PS), two of the most promising fiber optic sensing techniques for the structural health monitoring of smart materials based on carbon fiber composites. The paper describes the realization of a test plate equipped with both types of sensors and reports the characterization under static and dynamic conditions, highlighting pros and cons of both technologies. The FBG setup achieves 1.15 ± 0.0016 pm/kg static load response and reproduces dynamic excitation with 0.1% frequency uncertainty; the PS system exhibits a sensitivity of 1.74 ± 0.001 mV/kg and reproduces dynamic excitation with 0.5% frequency uncertainty. It is shown that the PS technology is a good and cheap alternative to FBG for vibration-monitoring of small structures at high frequency.

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Section: Polarimetric Sensing Systemmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%