Systems and methods for compensating for large moving objects in magnetic-tracking environments
US8228028B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 4, 2009 |
| Grant date | Jul 24, 2012 |
| Priority date | — |
| Expiry date | Feb 8, 2031 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B2090/3958
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
Methods for accurately tracking position and orientation of a magnetic-field sensor in a tracking volume when a large magnetic-field distorter is present in the tracking volume. In some of the methods, magnetic field data is collected from within the tracking volume both with and without the large magnetic-field distorter present in the tracking volume. This data is used to obtain correction information that is subsequently used during real-time operation of the magnetic-field sensor to correct the position and orientation solutions for the sensor for magnetic-field distortions caused by the presence of the large magnetic-field distorter in the tracking volume. Others of the methods involve modeling the large magnetic-field distorter using dipole and multipole modeling. Magnetic tracking systems for implementing the methods include hardware and software for carrying out the methods.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.