Object tracking system with non-contact object detection and...

G - Physics – 08 – B

Patent

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Details

G08B 13/14 (2006.01) G06K 17/00 (2006.01) G07B 15/04 (2006.01) G08B 13/24 (2006.01)

Patent

CA 2343404

An object tracking system is provided for tracking the removal of objects (41, 61, 181) from a location and the replacement of the objects (41, 61, 181) at the location. The system includes a radio frequency identification "RFID" tag (19, 34, 52, 61, 166, 231) attached to each of the objects (41, 61, 181) to be tracked and each tag (19, 34, 52, 61, 166, 231) has an antenna (22, 23, 37, 38, 54, 56, 76, 169, 187, 197, 219, 232). When activated, the RFID tag (19, 34, 52, 61, 166, 231) of an object (41, 61, 181) transmits a unique code identifying the object (41, 61, 181). A storage unit (81) is provided at the location and the storage unit (81) has a plurality of receptacles (83) configured to receive objects (41, 61, 181) replaced at the location. Each receptacle (83) has an associated antenna (87, 88, 134, 141, 149, 151, 173, 193, 199, 224) for activating the RFID tag (19, 34, 52, 61, 166, 231) of an object (41, 61, 181) in the receptacle and receiving the radio frequency transmitted code of the object (41, 61, 181). The antennae of the system can be capacitive plates (22, 23, 27, 38, 54, 56) for conveying the radio frequency transmissions (93) through capacitive coupling or inductive loops (173, 193, 197) for conveying the transmissions through the inductive coupling. A computer-based controller (67, 234) is coupled to the antenna of the receptacles (83) for receiving transmitted codes and determining based thereon the absence or presence and location of objects (41, 61, 181) within the storage unit (81).

L'invention concerne un système de repérage d'objets qui peut repérer le retrait d'objets (41, 61, 181) d'un emplacement ou leur remise en place audit emplacement. Le système inclut une étiquette d'identification radiofréquence (RFID) (19, 34, 52, 61, 166, 231) fixée à chaque objet (41, 61, 181) devant être repéré, chaque étiquette (19, 34, 52, 61, 166, 231) étant munie d'une antenne (22, 23, 37, 38, 54, 56, 76, 169, 187, 197, 219, 232). L'étiquette RFID (19, 34, 52, 61, 166, 231), lorsqu'elle est activée, transmet un code unique identifiant l'objet (41, 61, 181). Un poste de stockage (81) installé audit emplacement présente une pluralité de réceptacles (83) conçus pour recevoir les objets (41, 61, 181) remis en place audit emplacement. Chaque réceptacle (83) est associé à une antenne (87, 88, 134, 141, 149, 151, 173, 193, 199, 224) pour activer l'étiquette RFID (19, 34, 52, 61, 166, 231) d'un objet (41, 61, 181) placé dans le réceptacle et recevoir le code de l'objet (41, 61, 181) transmis par radiofréquence. L'antenne du système peut être constituée soit de plaques capacitives (22, 23, 27, 38, 54, 56) pour acheminer les transmissions par radiofréquence (93) à travers un accouplement capacitif, soit de boucles magnétiques (173, 193, 197) pour acheminer les transmissions à travers l'accouplement inductif. Un organe de commande informatique (67, 234) est couplé à l'antenne des réceptacles (83) pour recevoir les codes transmis et déterminer, sur cette base, l'absence ou la présence des objets (41, 61, 181), et leur emplacement à l'intérieur du poste de stockage (81).

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