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dc.contributor.authorTwedt, Jason Christopheren
dc.date.accessioned2014-03-14T21:36:34Zen
dc.date.available2014-03-14T21:36:34Zen
dc.date.issued2007-05-18en
dc.identifier.otheretd-05232007-130104en
dc.identifier.urihttp://hdl.handle.net/10919/42782en
dc.description.abstractMonitoring accurate temperature and pressure profiles in harsh environments is currently in high demand in aerospace gas turbine engines and nuclear reactor simulators. Having the ability to measure both quantities continuously over a region, without thermal coupling, using a sensor with a small size (envelope) is also highly desirable. Currently available MEMS (microelectromechanical systems) provide effective small scale pressure and temperature measurement devices, however, they have only been shown to be effective up to 600C and lack the ability to perform distributed measurements unless combined with fiber-optic techniques. In general, fiber-optics provide many advantages over electrical based sensors and are the ideal choice for high temperature regimes and distributed sensing. In this thesis, preliminary designs and suggested future work are presented for a sensor built within an 3.175 mm radius envelope and capable of distributed pressure and temperature sensing up to temperatures reaching 800C. Finite element analysis via ANSYS, along with analytical verification models have been used for the design evolution. Diaphragm based designs, seem to provide easy fabrication methods and good sensitivity, however, for this design to be realized at high temperature operation, a robust bonding method must be chosen to avoid unwanted deformation due to misfit strains.en
dc.publisherVirginia Techen
dc.relation.haspartpath.txten
dc.relation.haspartNashCooley.nben
dc.relation.haspartinput.txten
dc.relation.haspartThesis_twedt.pdfen
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subjectSensoren
dc.subjectPressureen
dc.subjectTemperatureen
dc.subjectFiber opticsen
dc.subjectFinite element analysisen
dc.subjectBellowsen
dc.subjectDiaphragm Sensorsen
dc.subjectHarsh Environmentsen
dc.subjectElliptical diaphragmen
dc.titleFiber-Optics Based Pressure and Temperature Sensors for Harsh Environmentsen
dc.typeThesisen
dc.contributor.departmentAerospace Engineeringen
dc.description.degreeMaster of Scienceen
thesis.degree.nameMaster of Scienceen
thesis.degree.levelmastersen
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen
thesis.degree.disciplineAerospace Engineeringen
dc.contributor.committeechairKapania, Rakesh K.en
dc.contributor.committeememberPatil, Mayuresh J.en
dc.contributor.committeememberSchetz, Joseph A.en
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-05232007-130104/en
dc.date.sdate2007-05-23en
dc.date.rdate2009-05-24en
dc.date.adate2007-05-24en


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