System and method for locating objects and communicating...

G - Physics – 01 – S

Patent

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G01S 13/75 (2006.01) B60R 25/00 (2006.01) G01S 11/02 (2006.01) G01S 13/76 (2006.01) G08C 17/02 (2006.01) H04L 9/32 (2006.01) A61B 5/00 (2006.01) A61B 5/01 (2006.01) A61B 5/0215 (2006.01) A61B 5/024 (2006.01) A61B 5/04 (2006.01) A61B 5/087 (2006.01) A61B 5/145 (2006.01) A61N 1/36 (2006.01) G01P 13/00 (2006.01)

Patent

CA 2601088

An object locator system utilizes a microtransponder (12) that is used in association with an object to be located. A remote locator (10) transmits an encoded signal in which is embedded an identification code associated with the object to be located. The microtransponder (12) receives the encoded transmitted signal and processes such signal utilizing fast fourier transform techniques. The microtransponder (12) correlates the transformed received signal with a fast fourier transformed version of an identification code associated with the microtransponder (12) and upon detection of a correlation, transmits an acknowledgement signal to the remote locator (10). The remote locator (10) determines the distance to the microtransponder (12) based upon the round trip time from transmission of the coded signal to the microtransponder (12) to the receipt of the acknowledgement signal.

La présente invention se rapporte à un système de localisation d'objets, qui fait appel à un microtranspondeur (12) associé à un objet destiné à être localisé. Un dispositif de localisation à distance (10) émet un signal codé contenant un code d'identification associé à l'objet destiné à être localisé. Le microtranspondeur (12) reçoit le signal émis codé, et traite ledit signal à l'aide de techniques de transformation de Fourier rapide. Le microtranspondeur (12) corrèle le signal reçu transformé avec une version transformée par transformation de Fourier rapide d'un code d'identification associé au microtranspondeur (12) et, lors de la détection d'une corrélation, transmet un signal d'accusé de réception au dispositif de localisation à distance (10). Le dispositif de localisation à distance (10) détermine la distance à laquelle se trouve le microtranspondeur (12) sur la base du laps de temps total s'écoulant entre la transmission du signal codé au microtranspondeur (12) et la réception du signal d'accusé de réception.

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