Development of Ionic Polymer Metallic Composites as sensors

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dc.contributor.authorGriffiths, David Johnen
dc.contributor.committeecochairLeo, Donalden
dc.contributor.committeecochairVlachos, Pavlos P.en
dc.contributor.committeememberRoan, Michael J.en
dc.contributor.departmentMechanical Engineeringen
dc.date.accessioned2014-03-14T20:47:47Zen
dc.date.adate2009-01-16en
dc.date.available2014-03-14T20:47:47Zen
dc.date.issued2008-09-26en
dc.date.rdate2009-01-16en
dc.date.sdate2008-11-12en
dc.description.abstractIonomeric polymer transducers (IPTs) are an exciting new class of smart materials that can serve a dual purpose in engineering or biomedical applications as sensors or actuators. Most commonly they are used for mechanical actuation, as they have the ability to generate large bending strains and moderate stress under low applied voltages. Although the actuation capabilities of IPTs have been extensively studied, the sensing capabilities of these transducers have yet to be fully explored. The work presented herein aims to investigate the fundamental sensing characteristics of these transducers and apply the acquired knowledge toward the development of an electronic stethoscope for digital auscultation. The sensors were characterized both geometrically and electrically to determine their effectiveness in resolving a signal from sub 1 Hz to 2 kHz. Impedance spectroscopy was used to interrogate the sensing mechanism. Following the characterization of the transducer, a bio–acoustic sensor was designed and fabricated. The bio–acoustic sensor was placed over the carotid artery to resolve the arterial pressure waveform in situ and on the thorax to measure the S1 and S2 sounds generated by the heart. The temporal response and spectral content was compared with previously known data and a commercially available electronic stethoscope to prove the acquisition of cardiovascular sounds.en
dc.description.degreeMaster of Scienceen
dc.identifier.otheretd-11122008-093649en
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-11122008-093649/en
dc.identifier.urihttp://hdl.handle.net/10919/35676en
dc.publisherVirginia Techen
dc.relation.haspartDavid_J_Griffiths_MSME_Thesis.pdfen
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subjectionic polymer metallic compositeen
dc.subjectcharacterizationen
dc.subjectIPMCen
dc.subjectsensoren
dc.titleDevelopment of Ionic Polymer Metallic Composites as sensorsen
dc.typeThesisen
thesis.degree.disciplineMechanical Engineeringen
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen
thesis.degree.levelmastersen
thesis.degree.nameMaster of Scienceen

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