Browsing by Subject "Magnetic induction"
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Item Identification of Preisach Measures(Texas Tech University, 2003-05) Shirley, Matthew EdwardA common occurrence in the modeling of magnetic and piezoelectric materials is the phenomenon of hysteresis. The Preisach operator has been successfully used in the modeling of physical systems with hysteresis, when the Preisach operator's density function is known. In this thesis, we examine a method for determining the density function for a physical system when implementing the Preisach operator and there is not enough experimental data to uniquely solve for the density function. To do this we will use a discretization of the Preisach plane, and implement a linear optimization method for experimental data.Item Non-intrusive generation of a pressure pulse propagating preferably in one direction along a metal pipeline(Texas Tech University, 2003-05) Shinde, Sachin VitaleThe purpose of the experiment was to generate a pressure pulse, which propagates preferably in one direction. The pressure pulse is required for detection of defects in metal pipelines. A pulse propagating only in one direction makes locating the defects simpler. It also makes the generator more effective. The pressure pulse is generated by a traveling electromagnetic pulse on a lumped element delay line. The magnetic component of the traveling wave generates a pressure pulse, which propagates preferably in the same direction as the electromagnetic pulse. An electrostatic detector detects the pressure pulse traveling though the pipe. Both the generator and detector are not in direct mechanical contact with the pipe. The experiment has been conducted successfully and the results of the experiment are presented. An enhancement of 4:1 of the pulse in the preferred direction to that in the undesired direction is obtained. The damping of the traveling pulse has been measured and is close to -0.19dB/m.Item Wireless power transfer in the classroom(2013-08) O'Dell, David Harrison; Ling, HaoTraditional methods of teaching magnetic induction with lab investigations using a battery, wire and compass are best reserved for demonstration purposes to introduce this particular topic. The modern student who sits in a physics course also lives in a world filled with an increasing number of small portable devices that will eventually be charged wirelessly using some form of magnetic induction. The topic of magnetic induction needs to be placed in the modern context it deserves since the future of transmitting power will eventually be through wireless means. The wireless power transfer kit described in this report is designed to improve student understanding and the application of magnetic induction in an engaging, relevant manner.