A dual wavelength fiber optic strain sensing system

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dc.contributor.authorMalik, Asifen
dc.contributor.committeechairMurphy, Kent A.en
dc.contributor.committeememberClaus, Richard O.en
dc.contributor.committeememberJacobs, Iraen
dc.contributor.departmentElectrical Engineeringen
dc.date.accessioned2014-03-14T21:30:36Zen
dc.date.adate2009-03-03en
dc.date.available2014-03-14T21:30:36Zen
dc.date.issued1996en
dc.date.rdate2009-03-03en
dc.date.sdate2009-03-03en
dc.description.abstractThe extrinsic Fabry-Perot interferometer (EFPI) has been extensively used as a strain sensor in various applications. However, like other interferometric sensors, the EFPI suffers from ambiguity in detecting directional changes of the applied perturbation, when the operating point is at a maxima or a minima on the transfer function curve. Different methods, or sensor configurations have been proposed to solve this problem. This thesis investigates the use of dual wavelength interferometry to overcome this limitation. Possible systems configurations based on dual wavelength interferometry were considered, and the comprehensive design and implementation of a dual laser time division multiplexed (TOM) system based is presented. The system operates by alternately pulse modulating two laser diodes, which are closely spaced in center wavelength. Although the strain rate measurement capability of the system is dependent primarily on the speed of its hardware and the accuracy of its software, it is shown that it can be considerably enhanced by employing digital signal processing techniques.en
dc.description.degreeMaster of Scienceen
dc.format.extentix, 84 leavesen
dc.format.mediumBTDen
dc.format.mimetypeapplication/pdfen
dc.identifier.otheretd-03032009-040724en
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-03032009-040724/en
dc.identifier.urihttp://hdl.handle.net/10919/41371en
dc.language.isoenen
dc.publisherVirginia Techen
dc.relation.haspartLD5655.V855_1996.M355.pdfen
dc.relation.isformatofOCLC# 34937153en
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subjectfiber optic sensorsen
dc.subjectinterferometeren
dc.subjectsignal reconstructionen
dc.subject.lccLD5655.V855 1996.M355en
dc.titleA dual wavelength fiber optic strain sensing systemen
dc.typeThesisen
dc.type.dcmitypeTexten
thesis.degree.disciplineElectrical Engineeringen
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen
thesis.degree.levelmastersen
thesis.degree.nameMaster of Scienceen

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