Coupled passive resonant circuits as battery-free wireless sensors

dc.contributor.advisorNeikirk, Dean P., 1957-en
dc.contributor.committeeMemberWood, Sharon L.en
dc.contributor.committeeMemberArapostathis, Aristotleen
dc.contributor.committeeMemberDodabalapur, Ananthen
dc.contributor.committeeMemberHassibi, Arjangen
dc.creatorPasupathy, Praveenkumaren
dc.date.accessioned2011-01-24T22:11:36Zen
dc.date.available2011-01-24T22:11:36Zen
dc.date.available2011-01-24T22:11:45Zen
dc.date.issued2010-05en
dc.date.submittedMay 2010en
dc.date.updated2011-01-24T22:11:45Zen
dc.descriptiontexten
dc.description.abstractDetection and monitoring of the damage created by the corrosion of the steel reinforcement in concrete structures is a challenging and multidisciplinary problem. Economical monitoring strategy that is long-term and nondestructive requires low-cost, battery-free, wireless sensors. Our Electronic Structural Surveillance (ESS) platform uses battery-free passive resonant circuit (tag) as a sensor. The tag is magnetically coupled to an external reader coil. It is interrogated/read remotely in a non-contact (wireless) manner and the state of the sensor is determined from a swept frequency impedance measurement. When paired with the correct sensing element (transducer), the tag can be used for a variety of sensing applications for example, chemical & biochemical sensors. A circuit model of the reader and tag for such a universal battery-free wireless sensor platform is developed. The interaction between design and detection limit is examined. The dependence of the measured signal strength and read range on the various reader and tag circuit parameters is analyzed. Since the values of the circuit of the coils are dependent on their geometries, the effect of specific coil geometry is evaluated and design recommendations are made.en
dc.description.departmentElectrical and Computer Engineeringen
dc.format.mimetypeapplication/pdfen
dc.identifier.urihttp://hdl.handle.net/2152/ETD-UT-2010-05-725en
dc.language.isoengen
dc.subjectContact-lessen
dc.subjectStructural health monitoringen
dc.subjectConcrete corrosionen
dc.subjectSteel reinforcementen
dc.subjectWireless sensorsen
dc.subjectSignal strengthen
dc.subjectCircuit designen
dc.subjectSensorsen
dc.titleCoupled passive resonant circuits as battery-free wireless sensorsen
dc.type.genrethesisen
thesis.degree.departmentElectrical and Computer Engineeringen
thesis.degree.disciplineElectrical and Computer Engineeringen
thesis.degree.grantorThe University of Texas at Austinen
thesis.degree.levelDoctoralen
thesis.degree.nameDoctor of Philosophyen

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