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Permanent link (DOI): https://doi.org/10.7939/R3432W

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Studies of Ultrasound Distribution and Ultrasound Generation Efficiency of Transducers Open Access

Descriptions

Other title
Subject/Keyword
Transducer
Ultrasound distribution
Type of item
Thesis
Degree grantor
University of Alberta
Author or creator
Ge, Chang
Supervisor and department
Liu, Qingxia (Department of Chemical and Material Engineering)
Chen, Jie (Department of Electrical and Computer Engineering)
Examining committee member and department
Liu, Qingxia (Department of Chemical and Material Engineering)
Chen, Jie (Department of Electrical and Computer Engineering)
Zhao, Qing (Department of Electrical and Computer Engineering)
Niu, Di (Department of Electrical and Computer Engineering)
Department
Department of Electrical and Computer Engineering
Specialization
Integrated Circuit and Systems
Date accepted
2014-12-10T13:43:54Z
Graduation date
2015-06
Degree
Master of Science
Degree level
Master's
Abstract
Renewable energy production is an important application of ultrasound waves. Ultrasound waves can increase the ethanol and biodiesel generated by biomass during metabolic behaviour. Ultrasound distribution and ultrasound generation efficiency of transducers are important for these applications. The ultrasound distribution and ultrasound generation efficiency of transducers were studied in this project. Theories of ultrasound distribution and ultrasound transducer were studied during literature survey. A method of transducer modeling was proposed based on research works before for studies of ultrasound distribution of a cylindrical transducer, which will be used in biodiesel production system in the future. Validation of the model was carried out. The model of a cylindrical transducer was built. The ultrasound distribution described by the model was validated by both simulation in MATLAB and measurement by a hydrophone. Studies of ultrasound generation efficiency were carried out from a mechanics point of view. Governing equations for displacement distribution over the transducer active surface were studied. A physical quantity was proposed for comparison of generation efficiency between different transducer structures. Transducer arrays with rectangular plate transducers being the element were validated by MATLAB simulation to be more efficient in ultrasound generation than a cylindrical transducer. A triangular prism transducer array was proposed to replace a cylindrical transducer in applications.
Language
English
DOI
doi:10.7939/R3432W
Rights
Permission is hereby granted to the University of Alberta Libraries to reproduce single copies of this thesis and to lend or sell such copies for private, scholarly or scientific research purposes only. Where the thesis is converted to, or otherwise made available in digital form, the University of Alberta will advise potential users of the thesis of these terms. The author reserves all other publication and other rights in association with the copyright in the thesis and, except as herein before provided, neither the thesis nor any substantial portion thereof may be printed or otherwise reproduced in any material form whatsoever without the author's prior written permission.
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