2026-09-19T07:27:00Zhttps://dspace.mit.edu/server/oai/requestoai:dspace.mit.edu:1721.1/918122026-06-06T00:55:35Zcom_1721.1_7582com_1721.1_7581col_1721.1_131023
Steven B. Leeb and Al-Thaddeus Avestruz.
George, Elizabeth C. (Elizabeth Christine)
Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science.
Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science
2014-11-24T18:36:28Z
2014-11-24T18:36:28Z
2014
2014
http://hdl.handle.net/1721.1/91812
894115410
Thesis: M. Eng., Massachusetts Institute of Technology, Department of Electrical Engineering and Computer Science, 2014.
Cataloged from PDF version of thesis.
Includes bibliographical references (pages 135-137).
In this thesis a wide-area impedance sensor used in hyperspectral imaging for a wide variety of applications is presented. Building on previous work, this sensor is decoupled from fluorescent lamps and thus is used to passively detect independent sources such as fluorescent lamps and laptop control signals. The active sensing electrodes with common-mode feedback are used with a spectrum analyzer and synchronous demodulator for source and material detection respectively. A setup for active source multiplexing is described and used in image reconstruction and material detection. Algorithms for image reconstruction from such ill-posed inverse problems are discussed and improvements are made. Hyperspectral techniques for extracting the occupancy values of various materials are shown. Finally, future experiments using this sensor for gesture sensing and as a purely digital demodulator for passive imaging are described.
by Elizabeth C. George.
M.Eng.
137 pages
eng
Massachusetts Institute of Technology
M.I.T. theses are protected by copyright. They may be viewed from this source for any purpose, but reproduction or distribution in any format is prohibited without written permission. See provided URL for inquiries about permission.
http://dspace.mit.edu/handle/1721.1/7582
Electrical Engineering and Computer Science.
Advanced applications in wide-area impedance sensing
Thesis
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