2005
DOI: 10.1088/0964-1726/14/3/001
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Fiber optic health monitoring of civil structures using long gage and acoustic sensors

Abstract: Structural health monitoring with optical fibers provides practical sensing capabilities in many applications including in aeronautics and mechanical structures. A variety of optical fiber sensors have been used including Bragg gratings, intensity or amplitude sensors, and Fabry-Perot ones. Civil structures pose further challenges in monitoring mainly due to their large dimensions, diversity as well as heterogeneity of materials involved, and hostile construction environment. Monitoring of strains, deformation… Show more

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Cited by 81 publications
(40 citation statements)
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“…The long gage sensors are configured to measure strain over lengths on the order of meters. Several types of long gage optic sensors having different sensing principles exist [6,7,11,12]. In our study, a long gage optic sensor based on a low-coherence interferometer is used.…”
Section: Average Strain From Long Gage Fiber Optic Sensorsmentioning
confidence: 99%
“…The long gage sensors are configured to measure strain over lengths on the order of meters. Several types of long gage optic sensors having different sensing principles exist [6,7,11,12]. In our study, a long gage optic sensor based on a low-coherence interferometer is used.…”
Section: Average Strain From Long Gage Fiber Optic Sensorsmentioning
confidence: 99%
“…The characteristics of the presented method are listed as: (1) a linear and direct relationship between strain and deflection is established to avoid error caused by the aforementioned double integral of curvature or transformation of response between time-domain and frequency-domain; (2) the method is suitable for both static and dynamic loads and external loads are irrelevant; (3) the method is applicable for different boundary conditions; (4) long-gauge strain sensors are utilized to ensure damage can be reflected and identified [17][18][19][20][21][22], and therefore the method can be reasonably extended to damaged structures. Firstly, the relationship between long-gauge strain and deflection was theoretically derived based on the improved moment-area method.…”
Section: Introductionmentioning
confidence: 99%
“…Compared with the traditional methods, the optical fiber sensors have advantages of corrosion resistance, compact size, immunity to electromagnetic interference, high sensitivity and the potential for multiplexing, so they have been widely applied in the field of structural health monitoring in the past two decades [8][9][10]. Some corrosion sensors based optical fibers have been presented.…”
Section: Introductionmentioning
confidence: 99%