Magnetic motion capture system using LC resonant magnetic marker composed of Ni-Zn ferrite core

S. Hashi, M. Toyoda, M. Ohya, Y. Okazaki, S. Yabukami, K. Ishiyama, K. I. Arai

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

We have proposed a magnetic motion capture system using an LC resonant magnetic marker. The proposed system is composed of an exciting coil, an LC marker, and a 5×5 -matrix search coil array (25 search coils). The LC marker is small and has a minimal circuit with no battery and can be driven wirelessly by the action of electromagnetic induction. It consists of a Ni-Zn ferrite core (3 mmφ×10 mm) with a wound coil and a chip capacitor, forming an LC series circuit with a resonant frequency of 186 kHz. The relative position accuracy of the system is less than 1 mm within the area of 100 mm3 up to 150 mm from the search coil array. Compared with dc magnetic systems, the proposed system is applicable for precision motion capture in optically isolated spaces without magnetic shielding because the system is not greatly influenced by earth field noise.

Original languageEnglish
Article number08B312
JournalJournal of Applied Physics
Volume99
Issue number8
DOIs
Publication statusPublished - 2006 May 25

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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