3-D Magnetic Tracking of a Single Subminiature Coil with a Large 2-D Array of Uniaxial Transmitters

Anton Plotkin, Eugene Paperno

Research output: Contribution to journalArticlepeer-review

63 Scopus citations

Abstract

A novel system and method for magnetic tracking of a single subminiature coil is described. The novelty of the method consists in employing a large, 8 × 8 array of coplanar transmitting coils. This allows us to always keep the receiving coil not far from the wide, flat transmitting array, to increase the signal-to-noise ratio, and to decrease the retransmitted interference. The whole transmitting array, 64 coils, is sequentially activated only at the initiation stage to compute the initial position of the receiving coil. The redundancy in the transmitters number provides fast and un-ambiguous convergence of the optimization algorithm. At the following tracking stages, a small (8 coils) transmitting subarray is activated. The relatively small subarray size allows us to keep a high update rate and resolution of tracking. For a 50-Hz update rate, the tracking resolution is not worse than 0.25 mm, 0.2° rms at a 200-mm height above the transmitting array's center. This resolution corresponds to an ∼l-mm, 0.6° tracking accuracy. The novelty of the method consists as well in optimizing the transmitting coils' geometry to substantially (down to 0.5 mm) reduce the systematic error caused by the inaccuracy of the dipole field approximation.

Original languageEnglish
Pages (from-to)3295-3297
Number of pages3
JournalIEEE Transactions on Magnetics
Volume39
Issue number5 II
DOIs
StatePublished - 1 Jan 2003

Keywords

  • Coplanar transmitting coils
  • Dipole field approximation error
  • Large transmitting array
  • Magnetic tracking
  • Subminiature coil

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering

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