System and method for magnetic tracking of a sensor for...

G - Physics – 01 – D

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G01D 5/20 (2006.01)

Patent

CA 2617380

A system and method for determining the location of a remote object, using a magnetic tracking sensor. The system and method include locating a magnetic core (132) asymmetrically disposed within an induction coil (130) and operably connecting a single DC electrical circuit (136) to ends defining the induction coil (130). The DC electrical circuit (136) provides a DC current to the induction coil (130) while the induction coil (130) is disposed in an external AC magnetic field (108) . The DC current adjusts the level of saturation of the magnetic core (132), and hence varies a response signal of the induction coil (130) disposed in the external AC magnetic field (108) to provide magnetic tracking of the induction coil (130) in 6 degrees of freedom.

L'invention concerne un système et une méthode pour déterminer l'emplacement d'un objet éloigné en faisant appel à un capteur de traçage magnétique. Ce système et cette méthode consistent à localiser un noyau magnétique (132) asymétriquement monté dans une bobine d'induction (130) et reliant fonctionnellement un circuit électrique CC (136) unique à des extrémités définissant la bobine d'induction (130). Le circuit électrique CC (136) fournit un courant CC à la bobine d'induction (130), tandis que la bobine d'induction (130) est montée dans un champ magnétique CA externe (108). Le courant CC règle le niveau de saturation du noyau magnétique (132), et par conséquent fait varier un signal de réponse de la bobine d'induction (130) située dans le champ magnétique CA externe (108) pour obtenir un traçage magnétique de la bobine d'induction (130) dans 6 degrés de liberté.

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