Dissertationen zum Thema „Optial fiber sensor“
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Pham, Thi Nhung. „Fabry-Perot interferometer based on end-of-fiber polymer microtip for chemical sensing“. Electronic Thesis or Diss., Bordeaux, 2024. http://www.theses.fr/2024BORD0006.
Der volle Inhalt der QuelleFabry−Perot interferometers (FPIs) have received a significant attention for their use in sensor applications. FPIs consist of an optical cavity with separate parallel reflecting surfaces which reflect incident light, resulting in an optical interferometric signal. The FPI signal depends on the distance between the reflecting surfaces and the refractive index of the cavity medium, which are sensitive to variation of environment humidity, temperature, pressure, and material. FPIs can be attached to optical fibers to form compact fiber optic FPI-based sensors in which the optical fiber works as a waveguide for both incident and reflected signal. This thesis presents FPI-based chemical sensors incorporating a polymer microtip located at the end of an optical fiber and characterizes their sensing capabilities for humidity, water, and chemical targets.Firstly, we develop a pentaerythritol triacrylate (PETA) tip on the facet of an optical fiber by a self-guiding photopolymerization. One end of the optical fiber is placed inside a PETA droplet and the self-guiding photopolymerization of PETA is actuated by a 375 nm laser injected to the other end of the fiber. The optimal conditions to form a straight and mechanically stable PETA tip are 1.0 μW of laser power × 1.0 second of exposure time. However, the PETA chains do not completely polymerize during this self-polymerization, leading to an unstable dynamic resonant frequency of the tip. Thus, the tip needs a post-polymerization under a UV 365 nm lamp to achieve a stable dynamic characteristic, which is applicable for further sensing applications.Secondly, we demonstrate the PETA tip as an effective sensor to detect humidity. The PETA tip acts as an optical cavity formed between the fiber-core/PETA and the PETA/environment interface, resulting in a clear interferometric signal. The FPI signal of the tip is highly sensitive to humidity in the air. This is due to hydroxyl groups within the PETA structure, which strongly absorb water molecules in the humid air and significantly swell the tip. The length and/or the refractive index of the tip are therefore changed, resulting in a FPI shift. The tip exhibits a consistent sensitivity of 90pm/%RH, equivalent to a relative sensitivity of 104 ppm/%RH in the humidity range from 30 to 80%. The sensing performance is highly reproducible and stable. Furthermore, the cross effect of the temperature is negligible, indicating a great practical potential for the devices.Next, we apply the FPI-based PETA tips to determine the water content in glycerol and ethylene glycol solutions. The FPI signal of the PETA tip shifts nonlinearly towards longer wavelengths as the water content increases from 0 to 100 wt.%. The shift in the FPI signal occurs due to the contraction in the tip length, which is linked to the loss of water inside the PETA structure caused by the hydrophilic solutions. When the water contamination is below 10 wt.%, the tip shows a sensitivity of 394 pm/wt.% and 226 pm/wt.% for glycerol and ethylene glycol solutions, respectively. Therefore, the FPI-based PETA tip shows a great potential in determining water content in hydrophilic aqueous solutions, including hydrocarbons.Finally, a tip consisting of a PETA core and a shell of molecularly imprinted polymers (MIPs) is developed for detecting Dansyl-L-phenylalanine. The PETA tip is initially fabricated using the self-guiding polymerization and MIPs are then copolymerized to form a thin shell layer around the PETA tip. Upon the selective binding of Dansyl-L-phenylalanine, the refractive index of the MIP layer changes, leading to the change in the FPI signal of the whole PETA/MIP tip. This straightforward and affordable method offers new innovative possibilities for creating FPI-based MIP fiber optic sensors, which can be applied for a wide range of analytes, including both non-fluorescent and fluorescent targets
Andrews, Jeffrey Pratt. „Longitudinal misalignment based strain sensor“. Thesis, Virginia Tech, 1989. http://hdl.handle.net/10919/43283.
Der volle Inhalt der QuelleA practical fiber optic strain sensor has been developed to measure strains in the range of 0.0 to 2.0 percent strain with a resolution ranging between 10 and 100 microstrain depending on sensor design choices. This intensity based sensor measures strain by monitoring strain induced longitudinal misalignment in a novel fiber interconnection. This interconnection is created by aligning fibers within a segment of hollow core fiber. Related splice loss mechanisms are investigated for their effect on resolution. The effect of gauge length and launch conditions are also investigated.
Master of Science
Lee, Shiao-Chiu. „Axial offset effects upon optical fiber sensor and splice performance“. Thesis, Virginia Polytechnic Institute and State University, 1985. http://hdl.handle.net/10919/91128.
Der volle Inhalt der QuelleM.S.
Bronk, Karen Srour. „Imaging based sensor arrays /“. Thesis, Connect to Dissertations & Theses @ Tufts University, 1996.
Den vollen Inhalt der Quelle findenAdviser: David R. Walt. Submitted to the Dept. of Chemistry. Includes bibliographical references. Access restricted to members of the Tufts University community. Also available via the World Wide Web;
Kominsky, Daniel. „Development of Random Hole Optical Fiber and Crucible Technique Optical Fibers“. Diss., Virginia Tech, 2005. http://hdl.handle.net/10919/28949.
Der volle Inhalt der QuellePh. D.
Wavering, Thomas A. „Optical Path Length Multiplexing of Optical Fiber Sensors“. Thesis, Virginia Tech, 1998. http://hdl.handle.net/10919/36037.
Der volle Inhalt der QuelleMaster of Science
Fan, Chenjun. „Fiber optic sensor based on dual ring resonator system /“. Online version of thesis, 1992. http://hdl.handle.net/1850/11070.
Der volle Inhalt der QuelleUtou, Frumence E. „Fiber optic sensors ensuring structural integrity“. Thesis, Cape Peninsula University of Technology, 2005. http://hdl.handle.net/20.500.11838/1300.
Der volle Inhalt der QuelleAmong the issues that are taken into consideration for many years by Engineers and Technologists is the integrity of the servicing elements in structures and mechanisms. It is a documented phenomenon that after a certain period of time, in service, engineering components tend to change their original state, and begin to develop faults and defects. This includes the original shape distortion due to effects such as bending, twisting, and cracks. The above-sited effects may be caused by the sudden or accumulative effect of overloading, thermal shocks, corrosion etc, which eventually lead to malfunction of these engineering components. The occurrence of the cracks may be as a result of stress variation in excess of different or similar materials; thermal shocks, vibration, etc. A system of structural health monitoring using optical fiber sensors to track down a crack occurrence and its propagation is considered to be a promising method in warning of catastrophic events. Taking advantage of optical fibers' properties and behavior, such as easy interaction with other materials, small size, low weight, corrosion resistance, geometrical flexibility and an inherent immunity to electromagnetic interference, there is potential in adopting the Fiber Optic Sensors (FOS) for structural health monitoring systems. Structural integrity does not confine itself to crack detection only. For example there are many instances where unwanted or excessive displacement may occur. Optical fibers play an important role in proximity sensing as evidenced in the literature [49] to [54] and available commercial systems. However it is felt that FOS displacement sensors may suffer in measurement accuracy due to in situ conditions.
Haskell, Adam Benjamin. „A Durability and Utility Analysis of EFPI Fiber Optic Strain Sensors Embedded in Composite Materials for Structural Health Monitoring“. Fogler Library, University of Maine, 2006. http://www.library.umaine.edu/theses/pdf/HaskellAB2006.pdf.
Der volle Inhalt der QuelleXiao, Hai. „Self-Calibrated Interferometric/Intensity-Based Fiber Optic Pressure Sensors“. Diss., Virginia Tech, 2000. http://hdl.handle.net/10919/28845.
Der volle Inhalt der QuellePh. D.
Peterson, Brian James. „Wireless sensor interrogator design for passive, resonant frequency sensors using frequency modulation spectroscopy“. Thesis, Montana State University, 2009. http://etd.lib.montana.edu/etd/2009/peterson/PetersonB0509.pdf.
Der volle Inhalt der QuelleIpson, Benjamin L. „Polarimetric Temperature Sensor Using Core-replaced Fiber“. Diss., CLICK HERE for online access, 2004. http://contentdm.lib.byu.edu/ETD/image/etd606.pdf.
Der volle Inhalt der QuelleWang, Xingwei. „Optical Fiber Tip Pressure Sensor“. Thesis, Virginia Tech, 2004. http://hdl.handle.net/10919/35490.
Der volle Inhalt der QuelleMiniature pressure sensors which can endure harsh environments are a highly sought after goal in industrial, medical and research fields. Microelectromechanical systems (MEMS) are the current methods to fabricate such small sensors. However, they suffer from low sensitivity and poor mechanical properties.
To fulfill the need for robust and reliable miniature pressure sensors that can operate under high temperatures, a novel type of optical fiber tip sensor only 125μm in diameter is presented in this thesis. The essential element is a piece of hollow fiber which connects the fiber end and a diaphragm to form a Fabry-Pérot cavity. The all-fused-silica structure fabricated directly on a fiber tip has little temperature dependence and can function very well with high resolution and accuracy at temperatures up to 600ï °C. In addition to its miniature size, its advantages include superior mechanical properties, biocompatibility, immunity to electromagnetic interference, disposability and cost-effective fabrication.
The principle of operation, design analysis, fabrication implementation and performance evaluation of the sensor are discussed in detail in the following chapters.
Master of Science
Brady, Geoffrey Phillip. „Fibre Bragg grating sensors : interrogation and multiplexing techniques“. Thesis, University of Kent, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.309781.
Der volle Inhalt der QuelleFeth, Shari. „Sapphire optical fiber sensors“. Thesis, This resource online, 1991. http://scholar.lib.vt.edu/theses/available/etd-12232009-020350/.
Der volle Inhalt der QuelleSilva, Muñoz Rodrigo. „Structural Health Monitoring Using Embedded Fiber Optic Strain Sensors“. Fogler Library, University of Maine, 2008. http://www.library.umaine.edu/theses/pdf/SilvaMunozR2008.pdf.
Der volle Inhalt der QuelleChen, Qiao. „ESA based fiber optical humidity sensor“. Thesis, Virginia Tech, 2002. http://hdl.handle.net/10919/10134.
Der volle Inhalt der QuelleMaster of Science
Miller, Mark S. „Optical fiber-based corrosion sensor systems“. Diss., This resource online, 1995. http://scholar.lib.vt.edu/theses/available/etd-03042009-041455/.
Der volle Inhalt der QuelleGaikwad, Parikshit S. „Chemically deposited optical fiber humidity sensor“. Master's thesis, Mississippi State : Mississippi State University, 2003. http://library.msstate.edu/etd/show.asp?etd=etd-06092003-141607.
Der volle Inhalt der QuelleRen, Yundong. „Specially Shaped Optical Fiber Probes: Understanding and Their Applications in Integrated Photonics, Sensing, and Microfluidics“. Digital WPI, 2019. https://digitalcommons.wpi.edu/etd-dissertations/569.
Der volle Inhalt der QuelleVošček, Jakub. „Optické vlákno jako distribuovaný teplotní senzor“. Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2020. http://www.nusl.cz/ntk/nusl-433164.
Der volle Inhalt der QuelleHolmberg, Patrik. „Laser processing of Silica based glass“. Doctoral thesis, KTH, Laserfysik, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-173929.
Der volle Inhalt der QuelleHuvudtemana i denna avhandling är fotokänslighet och fotostrukturering av optiska fibrer och bulk glas. Trots att forskning inom fotokänslighet i glas och optiska fibrer har pågått under mer än tre decennier är de bakomliggande mekanismerna ännu inte klarlagda. Syftet var att få en bättre förståelse för fotoresponsen genom att studera fotokäsligheten ur ett termodynamiskt perspektiv, i motsats till etablerad forskning med fokus på punktdefekter och strukturförändringar, samt mekaniska spännings effekter i optiska fibrer. Optiska fibrer användes för flertalet av de experimentella studierna av två skäl; för det första är fotokänsligheten i fibrer större och dessutom vet man mindre om bakomliggande mekanismer jämfört med motsvarande bulk glas, och för det andra kan fibrer vara enklare att studera eftersom de experimentellt kan ses som en endimensionell struktur.Inledningsvis utfördes ablaherings experiment på bulk glas med en infraröd laser med pikosekund pulser. Raka kanaler med ett designtvärsnitt på 40x40 μm tillverkades på ovansidan (mot infallande ljus) och bottensidan av provet och de resulterande geometrierna analyserades. Resultaten visar en högre känslighet för variationer i experimentella parametrar vid ablahering på undersidan vilket kan förklaras av inkubations effekter i materialet. Dessutom är den resulterande geometrin på ovansidan V-formad, oavsett experimentella parametrar, vilket kunde relateras till den numeriska aperturen hos den fokuserande linsen, vilket förklaras av skuggningseffekter.Efter detta arbete flyttades fokus mot optiska fibrer, UV inducerade fiber Bragg gitter (FBG), och termisk bearbetning med konventionell ugn samt även med en CO2-laser som källa för strålningsvärme.Först konstruerades ett system för CO2-laservärmning av fibrer. För mätning av temperaturen hos bearbetade fibrer användes en speciell sorts FBG med hög temperaturstabilitet, kallade ”Chemical Composition Gratings” (CCG). En grundlig karaktärisering och temperaturkalibrering utfördes och temperaturdynamiken mättes med en tidsupplösning på under en millisekund. Temperaturprofilen i fibern, och laserns strålprofil, kunde mätas med en spatiell upplösning begränsad av gitterlängden och fiberns diameter. Temperaturer upp till ~1750 °C, vilket är högre än mjukpunktstemperaturen, kunde mätas med korresponderande uppvärmnings- och avsvalningshastighet på 10.500 K/s och 6.500 K/s.Därefter gjordes en omfattande undersökning av värmebearbetning och termisk regenerering av FBG:er i telekomfiber. Resultaten visar att termisk gitter-regenerering aktiveras av flera olika mekanismer. Värmebearbetning vid en temperatur omkring 900 °C resulterade i starka gitter efter en regenerering vid en temperatur på 1100 °C. Två olika aktiveringsenergier kunde extraheras från en Arrhenius plot avseende brytningsindexmodulation och Braggvåglängd, med en skärningspunkt tillika runt 900 °C, vilket indikerar en avvägning mellan två motverkande mekanismer vid denna temperatur.Slutligen undersöktes temperaturdynamiken och de spektrala egenskaperna under tillverkning av långperiodiga fibergitter (LPG). Gittren tillverkades med CO2-vi iilasersystemet genom att skapa en periodisk urgröpning medelst termisk ablahering. Transmissionsförluster kunde reduceras med noggrant valda processparametrar. Dessa parametrar identifierades genom mätningar av ablaherat djup och transmissionsförlust som funktion av laserintensitet och exponeringstid.
QC 20150924
Beadle, Brad Michael. „Fiber optic sensor for ultrasound“. Diss., Georgia Institute of Technology, 2002. http://hdl.handle.net/1853/17869.
Der volle Inhalt der QuelleBeadle, Brad Michael. „Fiber optic sensor for ultrasound“. Thesis, Georgia Institute of Technology, 1999. http://hdl.handle.net/1853/19173.
Der volle Inhalt der QuelleShih, Jessica Chu-Huei. „Concentric-core optical fiber sensors“. Thesis, Virginia Polytechnic Institute and State University, 1986. http://hdl.handle.net/10919/91069.
Der volle Inhalt der QuelleM.S.
Barnes, Adam. „Sapphire fiber in optical sensors“. Thesis, This resource online, 1995. http://scholar.lib.vt.edu/theses/available/etd-09052009-041053/.
Der volle Inhalt der QuelleCASALICCHIO, MARIA LUISA. „Innovative Plastic Optical Fiber Sensors“. Doctoral thesis, Politecnico di Torino, 2012. http://hdl.handle.net/11583/2497120.
Der volle Inhalt der QuelleBiazon, Filho Alcino José. „Nova técnica de malha fechada para estabilização do ponto de operação de interrogadores de sensores com grade de bragg em fibras ópticas“. [s.n.], 2012. http://repositorio.unicamp.br/jspui/handle/REPOSIP/260881.
Der volle Inhalt der QuelleTese (doutorado) - Universidade Estadual de Campinas, Faculdade de Engenharia Elétrica e de Computação
Made available in DSpace on 2018-08-21T18:07:20Z (GMT). No. of bitstreams: 1 BiazonFilho_AlcinoJose_D.pdf: 3212736 bytes, checksum: 5eb7bde925a233493806c588f3c39cfe (MD5) Previous issue date: 2012
Resumo: Sensores de fibra óptica são imunes à interferência eletromagnética (EMI), e são uma excelente escolha para ser usado em ambientes eletricamente ruidosos aplicações em sensoriamento remoto, incluindo aeroespacial, ferroviário equipamentos de segurança militar e em linhas de alta tensão. Outras vantagens incluem o fato de que eles são compactos, leves e os sinais de medição podem ser transmitidos a distâncias muito grandes (da ordem de km). Os interrogadores convencionais para redes de Bragg (FBG) do sensor são equipamentos de custo elevado e não pode ser utilizado em aplicações de baixo custo. Neste trabalho é apresentada uma nova técnica de interrogação robusta e de baixo custo que apresenta uma boa precisão. A técnica, que utiliza um circuito de retroalimentação eletrônico para estabilizar o ponto de operação DC das grades de Bragg, permite a medição simultânea de ambos sinais AC e DC. Um protótipo do interrogador proposto foi projetado e implementado. A técnica exige apenas três componentes ópticos: um laser distribuído, um acoplador óptico e um fotodiodo. O interrogador foi testado com sucesso em uma aplicação de DC (medição de temperatura) e uma aplicação AC (medição de corrente elétrica). Os resultados experimentais mostraram que o controle eletrônico em malha fechada pode controlar o ponto de operação da FBG com uma precisão de ± 2 ppm
Abstract: Fiber optic sensors are immune to electromagnetic interference (EMI), and are an excellent choice for being used in electrically noisy environments sensing applications, including aerospace, rail, military security equipment and in high voltage power lines. Other advantages include the fact that they are compact, lightweight and the measured signals can be transmitted at very large distances (of the order of kilometers). The conventional interrogators for Fiber Bragg Gratings (FBG) sensor are high cost equipment and cannot be used in low cost applications. In this work it is presented a novel robust and low cost interrogation technique that presents good accuracy. The technique, which uses an electronic feedback loop to stabilize the DC operating point of the Bragg gratings, allows the simultaneous measurement of both AC and DC signals. A prototype of the proposed interrogator was designed and implemented. The technique requires only three optical components: a Distributed Feedback Laser, an optical coupler and one photodiode. The interrogator has been successfully tested in a DC application (temperature measurement) and an AC application (electrical current measurement). Experimental results showed that the electronic feedback loop can control the operation point of the FBG with a precision of ±2 ppm
Doutorado
Eletrônica, Microeletrônica e Optoeletrônica
Doutor em Engenharia Elétrica
Shreeve, Bryson J. „Magnetic Field Sensing with Slab Coupled Optical Fiber Sensors“. BYU ScholarsArchive, 2011. https://scholarsarchive.byu.edu/etd/2774.
Der volle Inhalt der QuelleKahn, Mohammed Tariq Ekeramodien. „Development of a non-monochromatic lightwave sensor for applications in smart structures research“. Thesis, Peninsula Technikon, 1998. http://hdl.handle.net/20.500.11838/888.
Der volle Inhalt der QuelleThe purpose of this study was to perform an investigation into advances in the field of opto-electronics and to develop a suitable lightwave sensor, for application in smart structures research. Included in the scope of this research was the theoretical development and analysis of an appropriate technology to lead to an implementation of such sensors. This project forms part of an overall plan to gain experience in optoelectronic (photonic) sensor design. In research done previously in smart structure monitoring, piezo-electric techniques with the usual electrical interconnections was used. In a highly distributed sensor system the problems of electromagnetic interference, the tribo-electric effect and noise could be problematic. In this research, opto electronic techniques were thoroughly researched and an improvement on laser based fibre-optic interferometers was made. A non monochromatic lightwave interferometer was developed from theory and a prototype tested. The results suggests that an interferometric sensor can be operated with a non monochromatic source by using a second interferometer to modulate the frequency spectrum of the light before it is detected by a photodetector. Various test and measurement circuits for improved photodetector performance were evaluated, as well as a study of signal processing techniques that would be of use for an upgrade of the project where specific feature detection and analysis using the sensor is envisaged. A specification for a computer based data acquisition system was developed to do initial tests. The project should continue, with the sensor head being improved and all the necessary signal processing routines programmed into a Labview based data acquisition system.
Burford, Mary Kathleen. „Material process monitoring with optical fiber sensors“. Thesis, Virginia Tech, 1996. http://hdl.handle.net/10919/45077.
Der volle Inhalt der QuelleMaster of Science
Noren, Jonathan Robert. „Electric Field Sensing in a Railgun Using Slab Coupled Optical Fiber Sensors“. BYU ScholarsArchive, 2012. https://scholarsarchive.byu.edu/etd/3482.
Der volle Inhalt der QuelleAllsop, Thomas David Paul. „A fibre optical strain sensor“. Thesis, University of Plymouth, 1999. http://hdl.handle.net/10026.1/2779.
Der volle Inhalt der QuelleLudden, Brendan Patrick. „A distributed optical fibre sensor“. Thesis, University of Cambridge, 1997. https://www.repository.cam.ac.uk/handle/1810/272327.
Der volle Inhalt der QuelleGibson, Richard S. „Slab-Coupled Optical Fiber Sensors for Electric Field Sensing Applications“. Diss., CLICK HERE for online access, 2009. http://contentdm.lib.byu.edu/ETD/image/etd3248.pdf.
Der volle Inhalt der QuelleKinney, Stuart. „The development of an optical position sensor“. Virtual Press, 1998. http://liblink.bsu.edu/uhtbin/catkey/1115421.
Der volle Inhalt der QuelleDepartment of Physics and Astronomy
Murphy, Kent A. „Novel phase-modulated optical fiber sensors“. Diss., Virginia Tech, 1992. http://hdl.handle.net/10919/39712.
Der volle Inhalt der QuellePark, William Heuywon. „Fluorescence lifetime sensor using optical fiber and optical signal processing“. Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk2/tape17/PQDD_0009/MQ34107.pdf.
Der volle Inhalt der QuelleDeWolf, Scott. „Optical and mechanical behavior of the optical fiber infrasound sensor“. Diss., [La Jolla] : University of California, San Diego, 2009. http://wwwlib.umi.com/cr/ucsd/fullcit?p1469578.
Der volle Inhalt der QuelleTitle from first page of PDF file (viewed October 22, 2009). Available via ProQuest Digital Dissertations. Includes bibliographical references (p. 46-48).
Garcia, Mina Diego Felipe. „Bi-tapered Fiber Sensor Using a Supercontinuum Light Source for a Broad Spectral Range“. University of Dayton / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=dayton1492001857501804.
Der volle Inhalt der QuelleCameron, Alexander John. „A Bayesian approach to optimal sensor placement“. Thesis, University of Oxford, 1989. http://ora.ox.ac.uk/objects/uuid:ad201132-d418-4ee4-a9d5-3d79bd4876a7.
Der volle Inhalt der QuelleChadderdon, Spencer L. „Application Improvements of Slab-Coupled Optical Fiber Sensors“. BYU ScholarsArchive, 2014. https://scholarsarchive.byu.edu/etd/3976.
Der volle Inhalt der QuelleKahn, Mohammed Tariq Ekeramodien. „Miniaturised dedicated application opto-electronic sensors in the evolution of smart systems“. Thesis, Peninsula Technikon, 2002. http://hdl.handle.net/20.500.11838/1196.
Der volle Inhalt der QuelleIn the last decade, the South Amcan Electricity Supply Commission would have had their ability to serve an ever demanding public severely tested. With the dilemma of providing electricity supply through hazardous environmental conditions, and with prospects of supplying power even beyond South Afiican borders, the need for a comprehensive damage and power delivery assessment strategy becomes all the more relevant. The rapid growth being made in the evolution of so called "intelligent" structures, with inherent sensor, actuator and control mechanisms built in can have direct influence on a power distribution network. At least in the foreseeable future, the impact ofphotonic sensors with inherent miniaturization, a foremost candidate in Smart System technology, can play a vital role in damage assessment of a potentially large network such as that found in the supply ofelectricity. Smart systems are nonliving systems that integrate the functions of sensing, actuation, logic and control, to respond adaptively to changes in their condition or environment to which they are exposed, in a useful and usually repetitive manner. Sensors are a fundamental part of the evolution of such systems and form the basis for the topic of this dissertation. The use ofoptical fiber sensors is increasing widely mainly due to their (a) miniature size, (b) remote signal processing ability, and (c) multiplexing capabilities. Because of the above features a variety of optical fiber sensing techniques has evolved over the years having potential for a myriad of applications. In this work a systems model and equations was developed for modeling the propagation of light in a optical waveguide, in order to study a Fabry Perrot sensor topology for application as a miniaturised sensor in a new type of smart structure, namely a smart electrical power system.
Harold, Douglas A. „An Evaluation of Optical Fiber Strain Sensing for Engineering Applications“. Thesis, Virginia Tech, 2012. http://hdl.handle.net/10919/41239.
Der volle Inhalt der QuelleMaster of Science
Maier, Eric William. „Buried fiber optic intrusion sensor“. Thesis, Texas A&M University, 2004. http://hdl.handle.net/1969.1/425.
Der volle Inhalt der QuelleAlfeeli, Bassam. „Ionizing Radiation Resistance of Random Hole Optical Fiber for Nuclear Instrumentation and Control Applications“. Thesis, Virginia Tech, 2009. http://hdl.handle.net/10919/32661.
Der volle Inhalt der QuelleMaster of Science
Luanje, Appolinaire Tifang. „INTEGRATED OPTICAL FIBER RAMAN SENSOR FOR CRYOGENIC APPLICATION“. MSSTATE, 2008. http://sun.library.msstate.edu/ETD-db/theses/available/etd-04042008-155057/.
Der volle Inhalt der QuelleWang, Yongxin. „High Speed Fiber Optic Spectrometer“. Diss., Virginia Tech, 2007. http://hdl.handle.net/10919/30126.
Der volle Inhalt der QuellePh. D.
Juarez, Juan C. „Distributed fiber optic intrusion sensor system for monitoring long perimeters“. Thesis, [College Station, Tex. : Texas A&M University, 2005. http://hdl.handle.net/1969.1/ETD-TAMU-1702.
Der volle Inhalt der QuelleMacLean, Alistair. „A distributed fibre optic water sensor“. Thesis, University of Strathclyde, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.248853.
Der volle Inhalt der Quelle