Image reconstruction on electrical resistance tomography measurements in a settling process

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dc.contributor.advisorTapson, Jonathanen_ZA
dc.contributor.authorHerholdt, Siegfrieden_ZA
dc.date.accessioned2014-08-30T05:52:37Z
dc.date.available2014-08-30T05:52:37Z
dc.date.issued2004en_ZA
dc.descriptionIncludes bibliographical references (leaves 60-62).en_ZA
dc.description.abstractThis thesis uses Electrical Resistance Tomography (ERT) to measure a settling process. The measurement hardware for this system was developed during previous work carried out by the author. This research is the continuation of this work by focusing on image reconstruction from the measured data. The reconstruction algorithm attempts to find the conductivity distribution of the interior of a rig from measurements made on its boundary. The method used in this thesis is the Newton-Raphson (NR) Algorithm, which employs iterative solutions of the Finite Element Method (FEM) in order to converge to a solution for conductivity. FEM is a numerical simulation method that discretises a region into elements and performs a global optimisation or minimisation in order to arrive at a solution. The NR-method is similar in principle to Newton's method, but is designed to operate on complex data and matrix equations in multiple dimensions. This thesis discusses the methods in reasonable detail and highlights several issues, including ill-conditioning, and regularisation as a method to improve the conditioning of the data. The results contain images of successful reconstruction of a settling process.en_ZA
dc.identifier.apacitationHerholdt, S. (2004). <i>Image reconstruction on electrical resistance tomography measurements in a settling process</i>. (Thesis). University of Cape Town ,Faculty of Engineering & the Built Environment ,Department of Electrical Engineering. Retrieved from http://hdl.handle.net/11427/6768en_ZA
dc.identifier.chicagocitationHerholdt, Siegfried. <i>"Image reconstruction on electrical resistance tomography measurements in a settling process."</i> Thesis., University of Cape Town ,Faculty of Engineering & the Built Environment ,Department of Electrical Engineering, 2004. http://hdl.handle.net/11427/6768en_ZA
dc.identifier.citationHerholdt, S. 2004. Image reconstruction on electrical resistance tomography measurements in a settling process. University of Cape Town.en_ZA
dc.identifier.ris TY - Thesis / Dissertation AU - Herholdt, Siegfried AB - This thesis uses Electrical Resistance Tomography (ERT) to measure a settling process. The measurement hardware for this system was developed during previous work carried out by the author. This research is the continuation of this work by focusing on image reconstruction from the measured data. The reconstruction algorithm attempts to find the conductivity distribution of the interior of a rig from measurements made on its boundary. The method used in this thesis is the Newton-Raphson (NR) Algorithm, which employs iterative solutions of the Finite Element Method (FEM) in order to converge to a solution for conductivity. FEM is a numerical simulation method that discretises a region into elements and performs a global optimisation or minimisation in order to arrive at a solution. The NR-method is similar in principle to Newton's method, but is designed to operate on complex data and matrix equations in multiple dimensions. This thesis discusses the methods in reasonable detail and highlights several issues, including ill-conditioning, and regularisation as a method to improve the conditioning of the data. The results contain images of successful reconstruction of a settling process. DA - 2004 DB - OpenUCT DP - University of Cape Town LK - https://open.uct.ac.za PB - University of Cape Town PY - 2004 T1 - Image reconstruction on electrical resistance tomography measurements in a settling process TI - Image reconstruction on electrical resistance tomography measurements in a settling process UR - http://hdl.handle.net/11427/6768 ER - en_ZA
dc.identifier.urihttp://hdl.handle.net/11427/6768
dc.identifier.vancouvercitationHerholdt S. Image reconstruction on electrical resistance tomography measurements in a settling process. [Thesis]. University of Cape Town ,Faculty of Engineering & the Built Environment ,Department of Electrical Engineering, 2004 [cited yyyy month dd]. Available from: http://hdl.handle.net/11427/6768en_ZA
dc.language.isoeng
dc.publisher.departmentDepartment of Electrical Engineeringen_ZA
dc.publisher.facultyFaculty of Engineering and the Built Environment
dc.publisher.institutionUniversity of Cape Town
dc.subject.otherMechanical Engineeringen_ZA
dc.titleImage reconstruction on electrical resistance tomography measurements in a settling processen_ZA
dc.typeThesis
uct.type.filetypeText
uct.type.filetypeImage
uct.type.publicationResearchen_ZA
uct.type.resourceThesisen_ZA
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