Relevant bibliographies by topics / Distributed fibre optic strain sensors

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  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers

Academic literature on the topic 'Distributed fibre optic strain sensors'

Author: Grafiati
Published: 4 June 2021
Last updated: 6 February 2022

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Journal articles on the topic "Distributed fibre optic strain sensors"

1

DeMerchant, Michael, Anthony Brown, Jeff Smith, Xiaoyi Bao, and Theodore Bremner. "Distributed strain sensing for structural monitoring applications." Canadian Journal of Civil Engineering 27, no. 5 (October 1, 2000): 873–79. http://dx.doi.org/10.1139/l00-006.

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Strain sensors are a valuable tool for assessing the health of structures. The University of New Brunswick, in conjunction with ISIS Canada, is developing a distributed fibre optic strain sensor based on Brillouin scattering. This sensor can provide a virtually unlimited number of measurement points using a single optical fibre. A description of the operating principles of the system is given, along with a summary of laboratory test results. Strain measurement accuracy as high as approximately ±11 µε has been demonstrated at 1 m spatial resolution. Spatial resolutions as short as 100 mm can be used, although with decreased strain measurement accuracy. Future development of the technology will include an enhancement allowing both strain and temperature to be measured simultaneously.Key words: strain sensor, fibre optics, distributed sensing, structural monitoring, Brillouin scattering.
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Tennyson, R. C., T. Coroy, G. Duck, G. Manuelpillai, P. Mulvihill, David JF Cooper, PW E. Smith, A. A. Mufti, and S. J. Jalali. "Fibre optic sensors in civil engineering structures." Canadian Journal of Civil Engineering 27, no. 5 (October 1, 2000): 880–89. http://dx.doi.org/10.1139/l00-010.

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This paper presents an overview of the development and application of ISIS fibre optic sensor (FOS) technology by the University of Toronto Institute for Aerospace Studies and Department of Electrical and Computer Engineering. The primary focus of this technology has involved the use of fibre Bragg gratings (FBGs) to measure strain and temperature in concrete structures and fibre reinforced plastic (FRP) overwraps applied to concrete structures. A brief review of existing fibre optic sensor configurations and the advantages of using FOS compared to other strain sensors is first presented. Subsequently, the development of new sensor concepts such as a long gauge of arbitrary length, a distributed gauge for measuring local strain gradients, and multiple FBGs on a single fibre optic cable are discussed, with examples of their application to civil engineering structures. In addition, the specialized instruments under development that are essential for obtaining strain information from these sensors are also described. Finally, the issue of wireless remote monitoring of FOS systems is addressed.Key words: fibre optic sensors, Bragg gratings, civil engineering structures, instrumentation.
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Sieńko, Rafał, Mariusz Zych, Łukasz Bednarski, and Tomasz Howiacki. "Strain and crack analysis within concrete members using distributed fibre optic sensors." Structural Health Monitoring 18, no. 5-6 (October 8, 2018): 1510–26. http://dx.doi.org/10.1177/1475921718804466.

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This article presents laboratory tests, with the purpose being to verify the suitability of standard optical fibres in a tight jacket for advanced strain analysis within concrete members. An optical reflectometer was used to enable the optical signal to be processed on the basis of the Rayleigh scattering phenomenon, so that strains and/or temperature changes were determined along the length of the measuring fibre. The measurements were carried out continuously in a geometrical sense (distributed measurements), with a spatial resolution starting from as fine as 5 mm. The arrangement of optical fibres inside the heterogeneous concrete medium and on its surface allowed for the identification and detailed analysis of local phenomena such as cracks. Remote and early location of structural damage with an estimation of its scale provides new opportunities for the monitoring of the structural health of reinforced concrete structures, facilitating the interpretation of its behaviour as well as failure risk management based on comprehensive and reliable measurement data. If traditional spot techniques are used, this approach is not possible. The aim of the initial studies was to analyse the strain distributions over compressed and tensioned measurement sections located on the surface of a cylindrical specimen of concrete. In the tests which followed, the reinforced concrete rod was eccentrically tensioned with fibre optics installed inside. Qualitative and quantitative verification of crack widths was made, with a narrow range up to 0.05 mm and a wider one to 0.30 mm. The results of the studies show very good accuracy of optical fibre sensor technology as a reference technique during the analysis of microcracks and narrow cracks, and moderate accuracy in the case of wider cracks. Despite using optical fibres in a tight jacket which mediates in strain transfer, the results obtained can be very suitable for the assessment of the structural condition of the member under consideration. It is also worth noting that the tests conducted indicate the effectiveness of distributed optical fibre technology for the analysis of concrete homogeneity and its structural behaviour within compressed areas, as it is possible to calculate strains over measuring bases that start from lengths as short as 5 mm.
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Nagulapally, Prashanth, Md Shamsuddoha, Ginu Rajan, Luke Djukic, and Gangadhara B. Prusty. "Distributed Fibre Optic Sensor-Based Continuous Strain Measurement along Semicircular Paths Using Strain Transformation Approach." Sensors 21, no. 3 (January 25, 2021): 782. http://dx.doi.org/10.3390/s21030782.

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Distributed fibre optic sensors (DFOS) are popular for structural health monitoring applications in large engineering infrastructure because of their ability to provide spatial strain measurements continuously along their lengths. Curved paths, particularly semicircular paths, are quite common for optical fibre placement in large structures in addition to straight paths. Optical fibre sensors embedded in a curved path configuration typically measure a component of strain, which often cannot be validated using traditional approaches. Thus, for most applications, strain measured along curved paths is ignored as there is no proper validation tool to ensure the accuracy of the measured strains. To overcome this, an analytical strain transformation equation has been developed and is presented here. This equation transforms the horizontal and vertical strain components obtained along a curved semicircular path into a strain component, which acts tangentially as it travels along the curved fibre path. This approach is validated numerically and experimentally for a DFOS installed on a steel specimen with straight and curved paths. Under tensile and flexural loading scenarios, the horizontal and vertical strain components were obtained numerically using finite element analysis and experimentally using strain rosettes and then, substituted into the proposed strain transformation equation for deriving the transformed strain values. Subsequently, the derived strain values obtained from the proposed transformation equation were validated by comparing them with the experimentally measured DFOS strains in the curved region. Additionally, this study has also shown that a localised damage to the DFOS coating will not impact the functionality of the sensor at the remaining locations along its length. In summary, this paper presents a valid strain transformation equation, which can be used for transforming the numerical simulation results into the DFOS measurements along a semicircular path. This would allow for a larger scope of spatial strains measurements, which would otherwise be ignored in practice.
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Bai, Hedan, Shuo Li, Jose Barreiros, Yaqi Tu, Clifford R. Pollock, and Robert F. Shepherd. "Stretchable distributed fiber-optic sensors." Science 370, no. 6518 (November 12, 2020): 848–52. http://dx.doi.org/10.1126/science.aba5504.

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Silica-based distributed fiber-optic sensor (DFOS) systems have been a powerful tool for sensing strain, pressure, vibration, acceleration, temperature, and humidity in inextensible structures. DFOS systems, however, are incompatible with the large strains associated with soft robotics and stretchable electronics. We develop a sensor composed of parallel assemblies of elastomeric lightguides that incorporate continuum or discrete chromatic patterns. By exploiting a combination of frustrated total internal reflection and absorption, stretchable DFOSs can distinguish and measure the locations, magnitudes, and modes (stretch, bend, or press) of mechanical deformation. We further demonstrate multilocation decoupling and multimodal deformation decoupling through a stretchable DFOS–integrated wireless glove that can reconfigure all types of finger joint movements and external presses simultaneously, with only a single sensor in real time.
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Martín-Pérez, Beatriz, Amre Deif, Bruno Cousin, Chunshu Zhang, Xiaoyi Bao, and Wenhai Li. "Strain monitoring in a reinforced concrete slab sustaining service loads by distributed Brillouin fibre optic sensors." Canadian Journal of Civil Engineering 37, no. 10 (October 2010): 1341–49. http://dx.doi.org/10.1139/l10-080.

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Reinforced concrete (RC) structures deteriorate and as a result crack due to extreme loading and (or) environmental conditions. Damage accumulation as such adversely affects the structure’s durability properties, impairing its service life. The intensity of cracking in an RC structure is usually regarded as the key criterion toward damage assessment and repair intervention. This paper presents the results of an experimental program in which the concrete strains of a small-scale RC slab sustaining in-service loads were monitored by traditional electrical strain gauges and distributed Brillouin fibre optic sensors in an attempt to detect damage due to crack formation. A comparison of these measurements with classical bending theory is also presented. The results show that distributed Brillouin fibre optic sensors can capture both tensile and compressive strains in concrete; however, the accuracy of their measurements is dependent on the proper installation of the sensors and the fibre length over which the strains are to be measured.
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Rajeev, Pathmanathan, Jayantha Kodikara, Wing Kong Chiu, and Thomas Kuen. "Distributed Optical Fibre Sensors and their Applications in Pipeline Monitoring." Key Engineering Materials 558 (June 2013): 424–34. http://dx.doi.org/10.4028/www.scientific.net/kem.558.424.

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Health monitoring of civil infrastructure systems has recently emerged as a powerful tool for condition assessment of infrastructure performance. With the widespread use of modern telecommunication technologies, structures could be monitored periodically from a central station located several kilometres away from the field. This remote capability allows immediate damage detection, so that necessary actions are taken to reduce the risk. Optical fiber sensors offer a relatively new technology for monitoring the performance of spatially distributed structures such as pipelines. In this regards, several commercially available strain and temperature sensing equipment such as discrete FBGs (Fibre Bragg Gratings) and fully distributed sensing techniques such as Raman DTS (distributed temperature sensor) and Brillouin Optical Time Domain Reflectometry (BOTDR) typically offer sensing lengths of the order of 100 km's. Distributed fiber optic sensing offers the ability to measure temperatures and/or strains at thousands of points along a single fiber. In this paper, the authors will give a brief overview of these optical fiber technologies, outline potential applications of these technologies for geotechnical engineering applications and experience in utilising BOTDR in water pipeline monitoring application.
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Xu, Cheng, and Zahra Sharif Khodaei. "Shape Sensing with Rayleigh Backscattering Fibre Optic Sensor." Sensors 20, no. 14 (July 21, 2020): 4040. http://dx.doi.org/10.3390/s20144040.

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In this paper, Rayleigh backscattering sensors (RBS) are used to realize shape sensing of beam-like structures. Compared to conventional shape sensing systems based on fibre Bragg grating (FBG) sensors, RBS are capable of continuous lateral sensing. Compared to other types of distributed fibre optic sensors (FOS), RBS have a higher spatial resolution. First, the RBS’s strain sensing accuracy is validated by an experiment comparing it with strain gauge response. After that, two shape sensing algorithms (the coordinate transformation method (CTM) and the strain-deflection equation method (SDEM)) based on the distributed FOS’ input strain data are derived. The algorithms are then optimized according to the distributed FOS’ features, to make it applicable to complex and/or combine loading situations while maintaining high reliability in case of sensing part malfunction. Numerical simulations are carried out to validate the algorithms’ accuracy and compare their accuracy. The simulation shows that compared to the FBG-based system, the RBS system has a better performance in configuring the shape when the structure is under complex loading. Finally, a validation experiment is conducted in which the RBS-based shape sensing system is used to configure the shape of a composite cantilever-beam-like specimen under concentrated loading. The result is then compared with the optical camera-measured shape. The experimental results show that both shape sensing algorithms predict the shape with high accuracy comparable with the optical camera result.
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Fenta, Mulugeta C., David K. Potter, and János Szanyi. "Fibre Optic Methods of Prospecting: A Comprehensive and Modern Branch of Geophysics." Surveys in Geophysics 42, no. 3 (March 9, 2021): 551–84. http://dx.doi.org/10.1007/s10712-021-09634-8.

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AbstractOver the past decades, the development of fibre optic cables, which pass light waves carrying data guided by total internal reflection, has led to advances in high-speed and long-distance communication, large data transmission, optical imaging, and sensing applications. Thus far, fibre optic sensors (FOSs) have primarily been employed in engineering, biomedicine, and basic sciences, with few reports of their usage in geophysics as point and distributed sensors. This work aimed at reviewing the studies on the use of FOSs in geophysical applications with their fundamental principles and technological improvements. FOSs based on Rayleigh, Brillouin, and Raman scatterings and fibre Bragg grating sensors are reviewed based on their sensing performance comprising sensing range, spatial resolution, and measurement parameters. The recent progress in applying distributed FOSs to detect acoustic, temperature, pressure, and strain changes, as either single or multiple parameters simultaneously on surface and borehole survey environments with their cable deployment techniques, has been systematically reviewed. Despite the development of fibre optic sensor technology and corresponding experimental reports of applications in geophysics, there have not been attempts to summarise and synthesise fibre optic methods for prospecting as a comprehensive and modern branch of geophysics. Therefore, this paper outlines the fibre optic prospecting methods, with an emphasis on their advantages, as a guide for the geophysical community. The potential of the new outlined fibre optic prospecting methods to revolutionise conventional geophysical approaches is discussed. Finally, the future challenges and limitations of the new prospecting methods for geophysical applications are elucidated.
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Stevens, Kevin J., Grant V. M. Williams, I. Monfils, D. Hirst, P. Wagner, S. G. Raymond, J. W. Quilty, and My T. T. Do. "Optics-Based Strain Sensing System." Materials Science Forum 700 (September 2011): 178–81. http://dx.doi.org/10.4028/www.scientific.net/msf.700.178.

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An optics-based strain sensing system is being developed for quazi-distributed strain sensing in locations and environments that are not accessible to conventional strain sensors. The system comprises an Optical Interrogator that has been designed and constructed by Southern Photonics [1], and optical fibre coupled Bragg grating strain sensors. It has been tested using commercial fibre Bragg gratings [2] that were attached to 2 samples of 316 grade stainless steel and cycled in strain and temperature using an Instron mechanical testing machine and temperature controlled cabinet. The results have been compared to the performance of conventional electrical resistance strain gauges. Pairs of fibre Bragg gratings were simultaneously interrogated at 1540 and 1550 nm centre wavelengths to demonstrate the ability of the system to use multiple sensors for quazi-distributed sensing and temperature compensation. The Optical Interrogator resolution is approximately 4 microstrains, accounting for longer term temperature drift, and it is capable of resolving dynamic strains at rates of up to 90 Hz.
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Dissertations / Theses on the topic "Distributed fibre optic strain sensors"

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Froggatt, Mark E. "Distributed fiber-optic strain and temperature sensors using photoinduced bragg gratings." Thesis, Virginia Tech, 1995. http://hdl.handle.net/10919/41902.

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Much of the analytical and computational work necessary for the development of distributed fiber-optic strain sensors using photo induced Bragg gratings is presented. The one dimensional wave equation is solved for a slowly varying sinusoidal modulation of the index of refraction. The solution is found to take the form of a fourier transform for low reflectivity «15%) gratings. As a result, the process can be inverted, and if the phase and amplitude of the reflected light can be measured over frequency, the phase and amplitude of the bragg grating as a function of length can be computed using the inverse fourier transform. These results are computationally verified, and then further analysis of critical engineering parameters is carried out. A measurement system and procedure are described. A method of writing long, low-reflectivity bragg grating is proposed.


Master of Science
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Huang, Zhengyu. "Quasi-Distributed Intrinsic Fabry-Perot Interferometric Fiber Sensor for Temperature and Strain Sensing." Diss., Virginia Tech, 2006. http://hdl.handle.net/10919/26247.

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The motivation of this research is to meet the growing demand for the measurand high-resolution, high-spatial resolution, attenuation insensitive and low-cost quasi-distributed temperature and strain sensors that can reliably work under harsh environment or in extended structures. There are two main drives for distributed fiber sensor research. The first is to lower cost-per-sensor so that the fiber sensors may become price-competitive against electrical sensors in order to gain widespread acceptance. The second is to obtain spatial distribution of the measurand. This dissertation presents detailed research on the design, modeling, analysis, system implementation, sensor fabrication, performance evaluation, sensor field test and noise analysis of a quasi-distributed intrinsic Fabry-Perot interferometric (IFPI) fiber sensor suitable for temperature and strain measurement. For the first time to our knowledge, an IFPI sensor using a different type of fiber spliced in between two single-mode fibers is proposed and tested. The proposed sensor has high measurement accuracy, excellent repeatability, a large working range and a low insertion-loss. It requests no annealing after the sensor is made, and the sensor is calibration-free. The sensor fabrication is low-cost and has a high yield rate. The goal for this research is to bring this sensor to a level where it will become commercially viable for quasi-distributed sensing applications.
Ph. D.
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Shen, Fabin. "UV-Induced Intrinsic Fabry-Perot Interferometric Fiber Sensors and Their Multiplexing for Quasi-Distributed Temperature and Strain Sensing." Diss., Virginia Tech, 2006. http://hdl.handle.net/10919/28053.

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Distributed temperature and strain sensing is demanded for a wide range of applications including real-time monitoring of industrial processes, health monitoring of civil infrastructures, etc. Optical fiber distributed sensors have attracted tremendous research interests in the past decade to meet the requirements of such applications. This research presents a multiplexed sensor array for distributed temperature and strain sensing that can multiplex a large number of UV-induced sensors along a single fiber. The objective of this research is to develop a quasi-distributed sensing technology that will greatly increase the multiplexing capacity of a sensor network and can measure temperature and strain with a high accuracy and high resolution. UV-induced intrinsic Fabry-Perot interferometric (IFPI) optical fiber sensors, which have low reflectance and low power loss, are good candidates for multiplexed sensors networks. Partial reflectors are constructed by irradiating photosensitive fiber with a UV laser beam. A pair of reflectors will form a Fabry-Perot interferometer that can be used for temperature and strain sensing. A sensor fabrication system based on a pulsed excimer laser and a shadow mask is developed. A spectrum-based measurement system is presented to measure the interference fringes of IFPI sensors. A swept coherent light source is used as the light source. The spectral responses of the IFPI sensors at different wavelengths are measured. A frequency division multiplexing (FDM) scheme is proposed. Multiple sensors with different optical path differences (OPD) have different sub-carrier frequencies in the measured spectrum of the IFPI sensors. The multiplexing capacity of the sensor system and the crosstalk between sensors are analyzed. Frequency estimation based digital signal processing algorithms are developed to determine the absolute OPDs of the IFPI sensors. Digital filters are used to select individual frequency components and filter out the noise. The frequency and phase of the filtered signal are estimated by means of peak finding and phase linear regression methods. The performance of the signal processing algorithms is analyzed. Experimental results for temperature and strain measurement are demonstrated. The discrimination of the temperature and strain cross sensitivity is investigated. Experimental results show that UV-induced IFPI sensors in a FDM scheme have good measurement accuracy for temperature and strain sensing and potentially have a large multiplexing capacity.
Ph. D.
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Geiger, Harald. "Quasi-distributed optical fibre strain sensors." Thesis, University of Southampton, 1995. https://eprints.soton.ac.uk/399104/.

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This thesis presents for the first time two complementary techniques to monitor the optical path length in optical fibre over both long and short sensing lengths. Both techniques may be used to measure the physical environment of the optical fibre, in particular strain and temperature, and are suitable for multiplexed operation. Signal-to-noise analysis shows that current optical time domain reflectometry (OTDR) systems do not fully exploit the spatial resolution theoretically available. A new OTDR technique exploits the theoretical findings to monitor the range of reflective markers in an optical fibre. Measuring strain in fibre sections of several metres is demonstrated. 100?m spatial resolution has been achieved with a pulse duration equivalent to 1 m fibre length and within one second measurement time. The first fibre Bragg grating interrogation system using an acousto-optic tunable filter (AOTF) is described. The interrogation system locks the AOTF wavelength to the wavelength of a selected grating. Measuring the frequency of the AOTF control signal provides an accurate measurement of the grating wavelength. A detailed system analysis is presented to enable the optimisation of system parameters. A wavelength resolution corresponding to 0.4 microstrain is achieved within 0.1sec measurement time, close to the resolution predicted by the system model. This technique allows the use of fibre gratings as sensors for the measurement of both quasi-static and dynamic strains. The combination of the two systems facilitate the utilisation of optical fibre to monitor a structure both over a few metres and at critical points. Both sensor types offer new measurement possibilities as embedded structure monitors, for example for in-service health and usage monitoring or as nerves for active control of smart structures.
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Liu, Tongyu. "Fibre optic sensors for strain and temperature measurements in fibre reinforced composites." Thesis, Brunel University, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.266638.

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Hadeler, Oliver. "Distributed feedback fibre laser strain and temperature sensors." Thesis, University of Southampton, 2002. https://eprints.soton.ac.uk/46100/.

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This thesis presents the development of two new types of polarimetric distributed feedback (DFB) fibre laser sensors for simultaneous strain and temperature measurements. These fibre Bragg grating (FBG) based sensors offer strain and temperature measurement accuracies of ±0.3 - ±15 με and ±0.04 - ±0.2°C which are suitable for many applications. The main advantage of these DFB fibre laser sensors over other FBG based sensors is the simplicity of their interrogation system. The first type of sensor operates stably in a single longitudinal mode which splits into two orthogonally polarised modes. This sensor utilises the wavelength of one polarisation mode and the RF beat frequency between the two polarisation modes. The system complexity is reduced to a minimum in the dual longitudinal mode polarirnetric DFB fibre laser sensor which utilises the RF beat frequencies between two longitudinal modes and their associated orthogonal polarisations, therefore requiring only a simple and cost effective frequency counter. -ions and pump excited state absorption into account. An extended version of this model incorporates, for the first time, self-heating in DFB fibre lasers which is caused by non-radiative decays. The performance of DFB fibre lasers employed in telecommunication applications is likely to benefit from these modelled results, which are also verified by experimental data.
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Kerrouche, Abdelfateh. "Fibre Optic Distributed Sensors Systems for Structural Health Monitoring." Thesis, City University London, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.507411.

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Levin, Klas. "Durability of Embedded Fibre Optic Sensors in Composites." Doctoral thesis, Stockholm, 2001. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-3145.

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Hayward, Justin Peter William. "Distributed optical-fibre sensors for monitoring mechanical strain and disturbance." Thesis, University of Southampton, 2005. https://eprints.soton.ac.uk/46856/.

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This thesis reports work carried out to develop an optical sensor capable of detecting disturbance of optical fibre cables, for application in protection of telecommunications infrastructure. Initially, three types of sensor were investigated, however after preliminary experimental and theoretical work it was decided to concentrate on a novel coherent-optical time-domain reflectometer (C-OTDR). The operation of the C-OTDR has been investigated theoretically, using various models to describe coherent scattering in the optical fibre. The assumptions used in the models were applied to a numerical simulation of coherent scattering, obtaining results in good agreement with theoretical predictions and experimental measurements. Having developed a clear explanation of the sensor's operation, a detailed noise analysis is carried out, enabling the limiting factors to be identified and minimised. The design and development of a portable sensor system is then described, and the results from a number of field trials are presented. Seeking to explain unexpected observations during these trials, a detailed experimental and theoretical analysis of the limits due to optical non-linearity was carried out, showing that the pulse power is limited by the need to prevent spectral broadening due to self-phase modulation, which adds noise to the sensor output. Applying the findings of these investigations, further field trials and laboratory tests were carried out with improved experimental C-OTDR sensors. By optimising the pulse power and carefully controlling the noise sources, it has been possible to demonstrate operation at longer ranges, with superior spatial resolution, than has been reported for other sensors of this type.
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Forsyth, David I. "Fibre optic sensors based on fluorescence techniques for temperature and strain measurement." Thesis, City University London, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.269363.

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Books on the topic "Distributed fibre optic strain sensors"

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Valis, Tomas. Localized and distributed fiber-optic strain sensors embedded in composite materials. [Downsview, Ont.]: Institute for Aerospace Studies, University of Toronto, 1992.

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Valis, Tomas. Localized and distributed fiber-optic strain sensors embedded in composite materials. [Downsview, Ont.]: University of Toronto, 1991.

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Melia, A. Instrumentation for fibre optic distributed sensors. Manchester: UMIST, 1996.

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Hogg, William Daylesford. Strain and temperature measurements using a localised polarimetric fibre optic sensor. [Downsview, Ont.]: University of Toronto, 1989.

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Melle, Serge Michel. A wavelength demodulation system for use with fibre optic Bragg grating sensors. [Toronto, Ont.]: University of Toronto, 1992.

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Valis, Tomas *. Localized and distributed fiber-optic strain sensors embedded in composite materials. 1991.

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Distributed Fibre Optic Sensors. ERA Technology Ltd, 1989.

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Craig, Lopatin, and Langley Research Center, eds. Application of a fiber optic distributed strain sensor system to woven E-glass composite. Hampton, Va: National Aeronautics and Space Administration, Langley Research Center, 2001.

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Book chapters on the topic "Distributed fibre optic strain sensors"

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Rogers, A. J. "New Methods for Distributed Optical-Fibre Measurement of Strain and Temperature in Large Structures." In Applications of Fiber Optic Sensors in Engineering Mechanics, 225–35. New York, NY: American Society of Civil Engineers, 1993. http://dx.doi.org/10.1061/9780872628953.ch15.

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Wanser, Keith H., Michael Haselhuhn, and Michael Lafond. "High Temperature Distributed Strain and Temperature Sensing Using OTDR." In Applications of Fiber Optic Sensors in Engineering Mechanics, 194–209. New York, NY: American Society of Civil Engineers, 1993. http://dx.doi.org/10.1061/9780872628953.ch13.

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Mahadi, Nur Hidayah, and Hisham Mohamad. "Interpretation Method of Distributed Fibre Optic Strain Sensor in Instrumented Static Pile Load Test." In Lecture Notes in Civil Engineering, 772–78. Singapore: Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-33-6311-3_88.

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Culshaw, Brian. "Distributed and Multiplexed Fibre Optic Sensor Systems." In Optical Fiber Sensors, 165–84. Dordrecht: Springer Netherlands, 1987. http://dx.doi.org/10.1007/978-94-009-3611-9_8.

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Costa, Susanga, Gayan Kahandawa, Jian Chen, and Jianfeng Xue. "Measuring Soil Strain Using Fibre Optic Sensors." In Proceedings of the 8th International Congress on Environmental Geotechnics Volume 2, 43–50. Singapore: Springer Singapore, 2018. http://dx.doi.org/10.1007/978-981-13-2224-2_6.

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Rui, Yi, and Qianchen Sun. "Measurement of Pile Cover Thickness Using Distributed Fibre Optic Sensors." In Information Technology in Geo-Engineering, 699–705. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-32029-4_59.

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Sierra-Pérez, Julián, and Joham Alvarez-Montoya. "Strain Field Pattern Recognition for Structural Health Monitoring Applications." In Pattern Recognition Applications in Engineering, 1–40. IGI Global, 2020. http://dx.doi.org/10.4018/978-1-7998-1839-7.ch001.

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Strain field pattern recognition, also known as strain mapping, is a structural health monitoring approach based on strain measurements gathered through a network of sensors (i.e., strain gauges and fiber optic sensors such as FGBs or distributed sensing), data-driven modeling for feature extraction (i.e., PCA, nonlinear PCA, ANNs, etc.), and damage indices and thresholds for decision making (i.e., Q index, T2 scores, and so on). The aim is to study the correlations among strain readouts by means of machine learning techniques rooted in the artificial intelligence field in order to infer some change in the global behavior associated with a damage occurrence. Several case studies of real-world engineering structures both made of metallic and composite materials are presented including a wind turbine blade, a lattice spacecraft structure, a UAV wing section, a UAV aircraft under real flight operation, a concrete structure, and a soil profile prototype.
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Li, Suzhen, and Zhishen Wu. "A model-free method for structural damage identification-based on dynamic strain sensing of distributed fiber optic sensors." In World Forum on Smart Materials and Smart Structures Technology. CRC Press, 2008. http://dx.doi.org/10.1201/9781439828441.ch175.

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"Brillouin-Based Distributed Temperature and Strain Sensors." In An Introduction to Distributed Optical Fibre Sensors, 161–229. CRC Press, 2017. http://dx.doi.org/10.1201/9781315119014-7.

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"Distributed Strain Sensors Practical lssues, Solutions And Applications." In An Introduction to Distributed Optical Fibre Sensors, 315–38. CRC Press, 2017. http://dx.doi.org/10.1201/9781315119014-11.

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Conference papers on the topic "Distributed fibre optic strain sensors"

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Miller, Gary A., Charles G. Askins, and E. Joseph Friebele. "Shape sensing using distributed fiber optic strain measurements." In Second European Workshop on Optical Fibre Sensors. SPIE, 2004. http://dx.doi.org/10.1117/12.566653.

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Woschitz, Helmut, Christoph Monsberger, and Martin Hayden. "Distributed fibre optic strain measurements on a driven pile." In Sixth European Workshop on Optical Fibre Sensors (EWOFS'2016), edited by Elfed Lewis. SPIE, 2016. http://dx.doi.org/10.1117/12.2236986.

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Siwowski, Tomasz W., Aleksander Kozlowski, and Leonard Ziemiański. "Distributed fibre optic sensors for advanced structural health monitoring of FRP composite bridge." In IABSE Congress, New York, New York 2019: The Evolving Metropolis. Zurich, Switzerland: International Association for Bridge and Structural Engineering (IABSE), 2019. http://dx.doi.org/10.2749/newyork.2019.1533.

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Abstract:
<p>Considering the worldwide recognized advantages of fibre optic sensors as measuring devices in structural health monitoring (SHM) of bridges and the unique ability to measure the long range distributed strain and temperature along the entire bridge superstructure, the distributed fibre optic sensors (DFOS) technology was chosen for the advanced SHM system of the first Polish FRP composite bridge. To develop an understanding of the long-term performance of the FRP bridge, a monitoring scheme utilizing DFOSs was implemented to assess any changes in the bridge structural behaviour in service. The monitored FRP bridge is a simply supported structure with four U- girders bonded with sandwich deck panels. The initial results of the SHM with the DFOS technology are the main subject of the paper. Analysis of the results obtained under proof tests in the field proved the effectiveness of the distributed fibre optic sensors for the SHM purposes. Wide range of practical problems related to sensor installation, fibre connection and data processing were successfully solved in the pilot field application. The smart <span>Rayleigh </span>sensors can ensure an acceptable measurement accuracy, thereby providing reliable strains referring to time-dependent behaviour of the FRP bridge span to assess the safety and serviceability of the FRP bridge.</p>
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Naruse, H. "River levee strain measurement using fiber optic distributed strain sensor." In 13th International Conference on Optical Fiber Sensors. SPIE, 1999. http://dx.doi.org/10.1117/12.2302056.

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Kusche, Nadine, Vivien Schukar, Detlef Hofmann, Frank Basedau, Wolfgang Habel, Helmut Woschitz, and Werner Lienhart. "Field examples for optical fibre sensor condition diagnostics based on distributed fibre optic strain sensing." In Fifth European Workshop on Optical Fibre Sensors, edited by Leszek R. Jaroszewicz. SPIE, 2013. http://dx.doi.org/10.1117/12.2025567.

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Naruse, Hiroshi, Hideki Uehara, Taishi Deguchi, Kazuhiko Fujihashi, Yasuhiko Ishikura, Masatoshi Onishi, Raul Espinoza, et al. "Underground Mine Monitoring Using Distributed Fiber Optic Strain Sensing System." In Optical Fiber Sensors. Washington, D.C.: OSA, 2006. http://dx.doi.org/10.1364/ofs.2006.thd5.

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Sayeh, Mohammed R., Lalit Gupta, D. Kagaris, R. Viswanathan, and B. Chung. "Multiplexed fiber optic strain sensors for distributed sensing." In Distributed Fiber Optical Sensors and Measuring Networks, edited by Yuri N. Kulchin. SPIE, 2001. http://dx.doi.org/10.1117/12.417877.

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Gu, Gordon P., Winston Revie, Lufan Zou, and Omur Sezerman. "Pipeline monitoring by Brillouin-scattering-based fibre optic distributed strain sensors: pipeline wall thickness detection." In 20th International Conference on Optical Fibre Sensors, edited by Julian D. C. Jones. SPIE, 2009. http://dx.doi.org/10.1117/12.835434.

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Peled, Yair, Lior Yaron, Avi Motil, and Moshe Tur. "Distributed and dynamic monitoring of 4km/sec waves using a Brillouin fiber optic strain sensor." In Fifth European Workshop on Optical Fibre Sensors, edited by Leszek R. Jaroszewicz. SPIE, 2013. http://dx.doi.org/10.1117/12.2025640.

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Beisenova, Aidana, Aizhan Issatayeva, Carlo Molardi, Kanat Dukenbayev, and Daniele Tosi. "Distributed Fiber Optic Strain-Sensing Catheter for Assisted Delivery of Epidural Anesthesia." In Optical Fiber Sensors. Washington, D.C.: OSA, 2018. http://dx.doi.org/10.1364/ofs.2018.tue1.

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