Magneto-inductive positioning using a rotating magnetic field
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United States of America Patent
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Apr 7, 2015
Grant Date -
Aug 29, 2013
app pub date -
Feb 23, 2012
filing date -
Feb 23, 2012
priority date (Note) -
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Abstract
A method and system for locating the position of a source that emits a rotating magnetic field. Three or more receivers are deployed or positioned in known position relative to each other, which may be along a common axis in some cases. Phase differences between the magnetic fields measured by the receivers are detected. The phase shifts are used to determine the location of the source. With three receivers, a range and bearing angle relative to a middle receiver may be determined. With five or more receivers, a range and two bearing angles may be determined, thereby providing a three-dimensional position.
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