SUBJECT: Ph.D. Proposal Presentation
BY: Min Li
TIME: Thursday, December 11, 2014, 1:00 p.m.
PLACE: MARC Building, 201
TITLE: Development of an Electromagnetic Sensing System for Field Reconstruction and Geometrical Feature Measurements
COMMITTEE: Dr. Kok-Meng Lee, Chair (ME)
Dr. Shreyes N. Melkote (ME)
Dr. Yan Wang (ME)
Dr. Boris I. Prilutsky (AP)
Dr. Yang Wang (CE)


This proposed research has been motivated by two practical applications: The first responds to a need to develop a geomagnetic field-based sensing system to help visually impaired patients locate objects and guide way-finding. The second is to develop a method that electromagnetically induces eddy-current in a conductive workpiece for real-time measurements of geometrical features in manufacturing. Research is proposed to address a common problem in these applications, which involves reconstruction of a physical field from limited measurements for characterizing geometrical features. Inspired by the simplicity of electromagnetic pole-based models, this research will formulate the forward and inverse electromagnetic problems and derive computationally efficient closed-form solutions to provide a basis for developing a multi-function electromagnetic sensing system and reconstructing a physical field of interest. The pole-based models will be employed in the design, analysis and optimization of the sensing system for the above mentioned applications, upon which a prototype sensing system will be developed to serve as a test-bed. An experimental investigation will be carried out to validate the concept feasibility of field reconstruction, verify the pole-based models and evaluate the sensor performance. Apart from the development of a multi-function electromagnetic sensing system for geometrical feature measurements, this research will lead to a general field-reconstruction method that has a spectrum of engineering applications.