2007 年 31 巻 6 号 p. 439-444
We propose a new system for sensing the positions of up to five wireless magnetic markers using phase detection. It consists of five resonated markers, a driving coil, and pickup coils. Slim LC resonated markers were fabricated and a detector was formed by connecting high-speed AD converters. The system has a position accuracy of around 1 mm, and can be used for highly accurate position sensing without magnetic shielding, because it is free from earth field noise. We tracked fingertips using five resonated markers.