A novel fiber optics based method to measure very low strains in large scale infrastructures

Regez, Bradley; Sayeh, M.R.; Mahajan, Anupama; Figueroa, Fernando

doi:10.1016/j.measurement.2008.05.005

Cited by 11 publications

(6 citation statements)

References 14 publications

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“…The various attenuation mechanisms include absorption, Rayleigh scattering and macro- and microbending radiation losses. Despite the efforts to minimize power losses, the dependence on these mechanisms is widely used in the development of micro- and macrobending based optical fiber sensors [ 36 , 37 ].…”

Section: Sensing Techniquesmentioning

confidence: 99%

Optical Sensors Based on Plastic Fibers

Bilro

Alberto

Pinto

et al. 2012

Sensors

313

131

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The recent advances of polymer technology allowed the introduction of plastic optical fiber in sensor design. The advantages of optical metrology with plastic optical fiber have attracted the attention of the scientific community, as they allow the development of low-cost or cost competitive systems compared with conventional technologies. In this paper, the current state of the art of plastic optical fiber technology will be reviewed, namely its main characteristics and sensing advantages. Several measurement techniques will be described, with a strong focus on interrogation approaches based on intensity variation in transmission and reflection. The potential applications involving structural health monitoring, medicine, environment and the biological and chemical area are also presented.

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Section: Sensing Techniquesmentioning

confidence: 99%

Optical Sensors Based on Plastic Fibers

Bilro

Alberto

Pinto

et al. 2012

Sensors

313

131

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“…e microscale strain cannot be accurately determined by traditional technologies but can be monitored by the fiberoptic techniques. e very low strain in large-scale infrastructures was determined by a novel fiber-optic method, which is invented by Regez et al [16]. At the same time, other studies [17][18][19][20] conducted the experiments in coal mine, and the results were significant to the study of monitoring deformation and fracture process of roadway by FBG.…”

Section: Introductionmentioning

confidence: 99%

Physical Simulation and Monitoring the Deformation and Fracture of Roadway in Coal Mining

Liu

Yang

Ding

et al. 2018

Advances in Civil Engineering

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Aiming at the large deformation and the dynamic fracture of roadway during the underground excavation or mining, a physical simulation and strain testing system was established, and the deformation process of surrounding body and its inner strain characteristics of the simulated roadway under loading was carried out. Results showed that the inner strain change of the measurement points can be divided into three types: the strain firstly increases and then decreases, the strain slowly increases and then increases sharply, and strain firstly reduces and then increases. The strain starting time is closely related to the failure path and boundary of tested samples. This paper suggested two criteria for determining the instability of roadways, which are a huge and faster increase of strain at the location of the roof and floor with high absolute value, or a small increase with a peak value or irregular fluctuation. This paper provides a new idea for the simulation of roadway instability and is significant in deeper understanding the deformation and destabilization of underground roadway.

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“…Hence, no additional reference arm is required, leading to a reduction in optical components and hence cost savings when compared to either the Michelson or Mach-Zehnder interferometer. Moreover, the FFPI also exhibits superior performance in terms of the frequency bandwidth, sensitivity as well as precision [5][6][7], and has been frequently employed in velocity, strain, acoustics, temperature, micro-assembly process and vibration measurement [8][9][10].…”

Section: Introductionmentioning

confidence: 99%

An extrinsic fiber Fabry-Perot interferometer for dynamic displacement measurement

Pullteap

Seat²

2014

Photonic Sens

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A versatile fiber interferometer was proposed for high precision measurement. The sensor exploited a double-cavity within the unique sensing arm of an extrinsic-type fiber Fabry-Perot interferometer to produce the quadrature phase-shifted interference fringes. Interference signal processing was carried out using a modified zero-crossing (fringe) counting technique to demodulate two sets of fringes. The fiber interferometer has been successfully employed for dynamic displacement measurement under different displacement profiles over a range of 0.7 µm to 140 µm. A dedicated computer incorporating the demodulation algorithm was next used to interpret these detected data as well as plot the displacement information with a resolution of λ/64. A commercial displacement sensor was employed for comparison purposes with the experimental data obtained from the fiber interferometer as well as to gauge its performance, resulting in the maximum error of 2.8% over the entire displacement range studied.

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A novel fiber optics based method to measure very low strains in large scale infrastructures

Cited by 11 publications

References 14 publications

Optical Sensors Based on Plastic Fibers

Optical Sensors Based on Plastic Fibers

Physical Simulation and Monitoring the Deformation and Fracture of Roadway in Coal Mining

An extrinsic fiber Fabry-Perot interferometer for dynamic displacement measurement

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