Electro-encephalographic Signal Averager

dc.contributor.advisorSchneider, William P.
dc.contributor.committeeMemberEverett, Robert L.
dc.contributor.committeeMemberHedgcoxe, Pat G.
dc.creatorHammer, Jerry Alan
dc.description.abstractOne potential method for obtaining high quality electro-encephalographs is to photographically average the electromagnetic signals of interest. Before any such process can be attempted, however, the concept and feasibility of photographic signal averaging must be demonstrated. The Electro-encephalographic Signal Averager fulfills this purpose. It provides a means to rotate a film-carrying drum through a specified angle at a constant speed. During the constant-speed rotation, optical signals may be recorded on the film. This process may be repeated a preset number of times. The signal averaging time (i.e., the time during which the drum is rotated through a specified angle) may be preset to 100 milliseconds, one second, or ten seconds. By averaging a large number of signals, some average value signal may be detected on the photograph. The Electro-encephalographic Signal Averager consists of two primary sections: an electronic control system and a servomechanism. The electronic control portion provides all necessary timing signals to permit presetting of the averaging time and the number of times cycling is to occur. It also furnishes appropriate control signals to the servomechanism. The servo assembly is approximated as a second order control system employing both position and velocity feedback. Using a high performance DC motor, a rise time of less than eight milliseconds and a drum rotation linearity of less than one percent was obtained.
dc.description.departmentElectrical and Computer Engineering, Department of
dc.format.digitalOriginreformatted digital
dc.rightsThis item is protected by copyright but is made available here under a claim of fair use (17 U.S.C. Section 107) for non-profit research and educational purposes. Users of this work assume the responsibility for determining copyright status prior to reusing, publishing, or reproducing this item for purposes other than what is allowed by fair use or other copyright exemptions. Any reuse of this item in excess of fair use or other copyright exemptions requires express permission of the copyright holder.
dc.titleElectro-encephalographic Signal Averager
thesis.degree.collegeCullen College of Engineering
thesis.degree.departmentElectrical Engineering, Department of
thesis.degree.disciplineElectrical Engineering
thesis.degree.grantorUniversity of Houston
thesis.degree.nameMaster of Science


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