Basic development of magnetic resonance coupling-based distance sensor with adjustable sensing range using active quality factor control

Recently, various types of mobile robots have clearly gained attention and some are readily available. In response to this, the authors have been studying on realizing both wireless charging and self-localization as an integrated compact system using magnetic resonance coupling. However, due to the fact that sensing range depends on the fixed quality factor of antenna, the narrow sensing range of the current system was a problem in the practical use. Therefore, the authors are considering a new method which enables the control of the sensing range by active quality factor control. However, the introduced theory and simulation results were preliminary so far. In response to this, this paper introduces an advanced sensing algorithm for overall sensor system with the experimental results of the prototype setup. As a result, it was proved that the quality factor could be controlled with the proposed method.