System and method for electromagnetic navigation in the...

A - Human Necessities – 61 – B

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A61B 5/06 (2006.01) A61B 19/00 (2006.01)

Patent

CA 2607564

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.

L'invention concerne un système et un procédé permettant de localiser un objet en fonction de l'émission de champs électromagnétiques. Ces champs électromagnétiques sont émis simultanément à partir d'émetteurs différents. Un champ électromagnétique est émis à une fréquence de base, les ondes restantes étant émises à des fréquences qui sont des harmoniques de cette fréquence de base. Les champs électromagnétiques composites sont mesurés à l'aide de capteurs. Le signal généré par chaque capteur est soumis à une analyse de Fourier afin de déterminer les forces des champs électromagnétiques individuels formant un champ électromagnétique composite. On utilise ensuite les données de force de champ individuel mesurées pour déterminer la position et l'orientation des capteurs par rapport aux émetteurs.

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