Review: optical fiber sensors for civil engineering applications

Leung, Christopher Kin Ying; Wan, Kai Tai; Inaudi, Daniele; Bao, Xiaoyi; Habel, Wolfgang; Zhou, Zhi; Ou, Jinping; Ghandehari, Masoud; Wu, Hao; Imai, Michio

doi:10.1617/s11527-013-0201-7

Cited by 320 publications

(142 citation statements)

References 74 publications

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“…The strain precisions are OFDR (1 με), BOTDR (40 με), BOTDA (20 με), BOFDA (2 με), BOCDA (10 με), FBG (1 με). The OFDR is a type of DOFS technologies which has shorter measuring time, higher sensitivity, and higher spatial resolution than other frequently-used DOFS technologies like BOTDR, BOTDA, BOFDA, BOCDA, and so on [10][11][12][13][14][15][16][17][18][19][20][21][22][23].…”

Section: Introductionmentioning

confidence: 99%

Experiment and Numerical Study on Deformation Measurement of Cast-in-Place Concrete Large-Diameter Pipe Pile Using Optical Frequency Domain Reflectometer Technology

et al. 2018

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Abstract:The Cast-in-place concrete large-diameter pipe (PCC) pile has been used as the foundation reinforcement and embankment in China due to its low cost and high bearing capacity. The deformation of PCC pile under different vertical loads is very important for the application of engineering. In order to study the deformation characteristics of PCC pile, a small-scale model test was carried out. The new distributed measuring technology, named Optical Frequency Domain Reflectometer (OFDR), was applied to measure the strain on the PCC pile. A single mode fiber (SMF) was used, and the methods of layout, packaging and protection of optical fiber are introduced in detail. The obtained data was dealt with by wavelet transform, and the strain curves were analyzed based on the experiments. The finite element (FE) analysis model was established by COMSOL Multiphysics, and the numerical results compared with the experiment results. It showed that the optical fiber sensor can measure the strain of PCC pile, and that the deformation of PCC pile can be successfully obtained by OFDR technology. The strain of the pile decreases with depth and increases with loading. The measured result agrees well with numerical simulation result. The potential application of OFDR technology to PCC pile in situ and PCC energy pile is discussed.

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Section: Introductionmentioning

confidence: 99%

Experiment and Numerical Study on Deformation Measurement of Cast-in-Place Concrete Large-Diameter Pipe Pile Using Optical Frequency Domain Reflectometer Technology

et al. 2018

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“…FBG-based displacement sensors have attracted extensive attention owing to their remarkable advantages such as, miniature size, corrosion resistance, immunity to electromagnetic interference (EMI) and multiplexing capability [1][2]. Their implementations mainly involve pasting FBG elements on elastic structures to detect displacement.…”

Section: Introductionmentioning

confidence: 99%

A temperature-insensitive FBG displacement sensor with a 10-nanometer-grade resolution

Tan

et al. 2018

IEICE Electron. Express

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This paper proposed and studied a simple and novel displacement sensor that stretching two fiber Bragg gratings (FBGs) directly with a developed lever structure. The sensing principle was presented, and the corresponding theoretical model was derived and validated. Experimental results show that this design has an excellent displacement sensitivity of 23.654 pm/μm and a high resolution of 42 nm within a range of 0~300 μm. The resonant frequency and dynamic working bandwidth of the sensor are 115 Hz and 0~50 Hz respectively, which were obtained through finite element method (FEM) and modal testing experiment. The difference method was utilized to decouple temperature sensitivity of the FBGs, and the experimental results indicate that the designed sensor shows good temperature independence. This sensor can be utilized for micro-amplitude displacement measurement in harsh industry environment. Keywords: fiber Bragg grating, lever structure, displacement, temperature-insensitive Classification: Optical system

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“…Fiber Bragg gratings (FBGs) are functional fiber-optical sensors with excellent measurement precision, good stability, short response time, and provide quasi-distributed measurement. They have gradually become a preferred sensor and have wide applications in hydraulic engineering, electrical power engineering and the petrochemical industry in the measurement of structural defects and structural stress-strain [1][2][3][4][5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Principles and Application of Polyimide Fiber Bragg Gratings for Surface Strain Measurement

et al. 2017

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Abstract:Although theoretical investigation has demonstrated that fewer strain transfer layers imply a greater strain transfer ratio, as well as increased accuracy, most researchers are still focused on investigating encapsulated Fiber Bragg gratings (FBGs) in surface strain measurements. This is because, in a traditional view, bare FBGs are too fragile to be mounted on the substrate for measuring surface strain. Polyimide FBGs may provide a better balance point between accuracy and protection. A new method to measure surface strain with polyimide fiber Bragg gratings is proposed. Bare polyimide FBGs have a polyimide coating, but like regular non-coated FBGs. This gives polyimide FBGs a higher strain transfer ratio and response frequency. Bare polyimide FBGs can be considered as uncoated FBGs. The coupling of the matrix material of polyimide FBGs is improved as compared to FBGs without coating. In order to verify the capacity for surface strain measurement, polyimide FBGs are mounted to obtain the surface strain of a concrete specimen with SM130-700 interrogator from Micron Optics Incorporation (MOI) with a sampling frequency maximum of 2000 Hz. The experiment demonstrates that polyimide FBGs work well even in dynamic surface strain measurements such as explosion measurement. Validation experiment in this paper also proposed that fewer strain transfer layers can increase dynamic response frequency and coupling between FBG and substrate.

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Review: optical fiber sensors for civil engineering applications

Cited by 320 publications

References 74 publications

Experiment and Numerical Study on Deformation Measurement of Cast-in-Place Concrete Large-Diameter Pipe Pile Using Optical Frequency Domain Reflectometer Technology

Experiment and Numerical Study on Deformation Measurement of Cast-in-Place Concrete Large-Diameter Pipe Pile Using Optical Frequency Domain Reflectometer Technology

A temperature-insensitive FBG displacement sensor with a 10-nanometer-grade resolution

Principles and Application of Polyimide Fiber Bragg Gratings for Surface Strain Measurement

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