Wireless metamaterial-inspired rotation sensors

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buir.advisorErtürk, Vakur Behçet
dc.contributor.authorGargari, Ali Maleki
dc.date.accessioned2017-07-11T13:27:13Z
dc.date.available2017-07-11T13:27:13Z
dc.date.copyright2017-06
dc.date.issued2017-06
dc.date.submitted2017-07-06
dc.departmentDepartment of Electrical and Electronics Engineeringen_US
dc.descriptionCataloged from PDF version of article.en_US
dc.descriptionThesis (M.S.): Bilkent University, Department of Electrical and Electronics Engineering, İhsan Doğramacı Bilkent University, 2017.en_US
dc.descriptionIncludes bibliographical references (leaves 40-44).en_US
dc.description.abstractRecently steel construction structures have been attracting increasingly more attention due to the speed and ease of their construction. However, to detect potential damages in these structures, long-term and cost-effective health monitoring solutions are required. A rotation-based bending movement, which typically occurs in the load carrying elements of these structures (such as beams), is an example of the aforementioned potential damage. In this thesis, for measuring small bending rotations (10−4 ~ 10−5 radians) in the structures made of materials such as steel, a novel wireless rotation sensing system with a high level of sensitivity and resolution is proposed and demonstrated. This system consists of two elements: an interrogating antenna and an inter-digital double-layer sensor. The proposed sensing system operates based on the principle of near-field coupling between the antenna and the sensor. Briefly, by rotating one layer with respect to the other, the electromagnetic coupling between the layers changes and the resonance frequency is consequently shifted. This frequency shift can be recorded by tracking the resonance dips in the S11 response of the antenna. In the thesis work, various experiments were systematically performed to characterize the sensing system. A high rotation resolution of 20 µ-radians, an excellent sensitivity level of 28 MHz/degree, and a large dynamic range extending over 40◦ were measured. Furthermore, the validity of measurement results was verified by using full-wave electromagnetics simulator and applying digital image correlation (DIC) method for 2D measurements.en_US
dc.description.degreeM.S.en_US
dc.description.provenanceSubmitted by Betül Özen (ozen@bilkent.edu.tr) on 2017-07-11T13:27:13Z No. of bitstreams: 1 MS_Thesis_Ali_Maleki Gargari.pdf: 29422640 bytes, checksum: aeea89df0617752c00606280965ca0f6 (MD5)en
dc.description.provenanceMade available in DSpace on 2017-07-11T13:27:13Z (GMT). No. of bitstreams: 1 MS_Thesis_Ali_Maleki Gargari.pdf: 29422640 bytes, checksum: aeea89df0617752c00606280965ca0f6 (MD5) Previous issue date: 2017-07en
dc.description.statementofresponsibilityby Ali Maleki Gargari.en_US
dc.embargo.release2018-07-30
dc.format.extentix, 44 leaves : illustrations, charts (some color) ; 29 cmen_US
dc.identifier.itemidB155885
dc.identifier.urihttp://hdl.handle.net/11693/33381
dc.language.isoEnglishen_US
dc.publisherBilkent Universityen_US
dc.rightsinfo:eu-repo/semantics/openAccessen_US
dc.subjectWireless passive sensoren_US
dc.subjectRotation sensoren_US
dc.subjectMetamaterial-inspired sensoren_US
dc.titleWireless metamaterial-inspired rotation sensorsen_US
dc.title.alternativeKablosuz metamalzemeden ilham alınan dönüş algılayıcılarıen_US
dc.typeThesisen_US

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Dept. of Electrical and Electronics Engineering - Master's degree