Modelling and testing of a piezoelectric sensor for defect detection in steel rods using acoustic guided waves

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dc.contributor.authorDurham, Nicholas
dc.contributor.examiningcommitteeBridges, Gregory (Electrical and Computer Engineering) Wu, Nan (Mechanical Engineering)en_US
dc.contributor.supervisorThomson, Douglas (Electrical and Computer Engineering)en_US
dc.date.accessioned2018-08-23T17:03:06Z
dc.date.available2018-08-23T17:03:06Z
dc.date.issued2018-08en_US
dc.date.submitted2018-08-21T18:18:35Zen
dc.date.submitted2018-08-23T16:58:37Zen
dc.degree.disciplineElectrical and Computer Engineeringen_US
dc.degree.levelMaster of Science (M.Sc.)en_US
dc.description.abstractCorrosion in grounding electrodes is an emerging problem affecting electric power distribution systems worldwide. An effective means to detect acute corrosion within specific grounding rods remains elusive. However, a promising method for corrosion detection is being explored that is based on acoustic guided waves. An acoustic pulse is transmitted into a steel rod using a piezoelectric element. The transmitted wave echoes off of any defects which may be present, letting their size and location be made known. A transducer is developed that best transmits the longitudinal mode into the rod. A novel model of the pulse-echo system using PSpice is presented. The model is compared with lab experiments using frequency and time domain testing and show that our model is in close agreement with the lab measurements. A novel pulse-echo transceiver embedded system is developed and presented for use in field testing. Measurements obtained from the board are compared with bench-top equipment to verify accuracy and quality.en_US
dc.description.noteOctober 2018en_US
dc.identifier.urihttp://hdl.handle.net/1993/33223
dc.language.isoengen_US
dc.rightsopen accessen_US
dc.subjectGrounding Roden_US
dc.subjectCorrosionen_US
dc.subjectAcoustic guided wavesen_US
dc.subjectcorrosion detectionen_US
dc.subjectpiezoelectricen_US
dc.subjectpulse-echo methoden_US
dc.subjectPZTen_US
dc.subjectpiezoen_US
dc.titleModelling and testing of a piezoelectric sensor for defect detection in steel rods using acoustic guided wavesen_US
dc.typemaster thesisen_US
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