System and method for electromagnetic navigation in the vicinity of a metal object
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United States of America Patent
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Dec 17, 2013
Grant Date -
Jun 28, 2012
app pub date -
Mar 2, 2012
filing date -
May 5, 2005
priority date (Note) -
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Abstract
A system and method for performing object localization based on the emission of electromagnetic fields. The electromagnetic fields are simultaneously emitted from different transmitters. One electromagnetic field is emitted at a base frequency; the remaining waves are emitted at frequencies that are harmonics of the base frequency. The composite magnetic fields are measured by sensors. The signal generated by each sensor is subject to a Fourier analysis to determine the strengths of the individual electromagnetic fields forming the composite electromagnetic field. These individual measure field strength data are then used to determine the position and orientation of the sensors relative to the transmitters.
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