A system and method for determining proximity to a wireless...

G - Physics – 01 – V

Patent

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Details

G01V 3/08 (2006.01) A01K 3/00 (2006.01) G01P 13/02 (2006.01) G01V 3/10 (2006.01) G01V 13/00 (2006.01)

Patent

CA 2677059

Described is a boundary proximity determining system for wirelessly defining a boundary having a programmable shape and for indicating the occurrence of a rover unit traversing the boundary. The boundary proximity determining system includes a base station unit that generates a plurality of magnetic fields. The boundary proximity determining system also includes a rover unit that is responsive to the generated magnetic fields such that the rover unit defines the boundary in terms of the intensities and polarities of the magnetic fields. The rover unit determines whether the rover unit is within or outside the boundary by determining the current location of the rover unit in terms of the intensities and polarities of the magnetic fields and comparing the current location to the boundary.

L'invention concerne un système de détermination de proximité de frontière pour définir sans fil une frontière ayant une forme programmable et pour indiquer l'occurrence d'une unité itinérante traversant la frontière. Le système de détermination de proximité de frontière comprend une unité de station de base qui génère une pluralité de champs magnétiques. Le système de détermination de proximité de frontière comprend également une unité itinérante qui est sensible au champ magnétique généré de sorte que l'unité itinérante définit la frontière en termes des intensités et des polarités des champs magnétiques. L'unité itinérante détermine si l'unité itinérante est à l'intérieur ou à l'extérieur de la frontière en déterminant l'emplacement actuel de l'unité itinérante en termes des intensités et des polarités des champs magnétiques et en comparant l'emplacement actuel à la frontière.

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