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http://dx.doi.org/10.5369/JSST.2002.11.6.365

Detection of Levitated Ring using Photo Sensor and Construct of an Education System  

Park, Seong-Wook (Electricity Applied Computer, Kumi College)
Publication Information
Journal of Sensor Science and Technology / v.11, no.6, 2002 , pp. 365-370 More about this Journal
Abstract
The jumping ring apparatus described in this study is used to demonstrate and educate the effects of electromagnetic induction. Placing an aluminum ring over the core and switching on AC source causes the ring to jump in the air due to induced currents in the ring producing a magnetic field opposed to that produced in the core. This force is a function of flux density, ac current of ring and levitated height of the ring. Using photo sensor arrays, detect the ring position and represent the position of the ring to analog voltage for an education performance. This paper presents modelling of the jumping ring system and shows how does control signal generate in order to follow desired position.
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