Patent ID: 6615155
Filing Date: 2003-09-02
Classification: A61B,G01D

Abstract:
A method of tracking an object that moves in three dimensions, comprising the steps of:(a) providing the object with at least one vector field component sensor for measuring a respective component of a vector field; (b) for each said at least one vector field component sensor, empirically determining parameters of a set of equations that relate said respective component only to a position of the object with respect to a reference frame; (c) providing a plurality of vector field generators for generating respective instances of said vector field, each said generator having a fixed respective position in said reference frame; (d) for each said generator: (i) generating said respective instance of said vector field, and (ii) for each said at least one sensor, measuring said respective component of said respective instance of said vector field; and (e) solving said set of equations for said position of the object.