Electronic article surveillance and identification device,...

Details Electronic article surveillance and identification device,... Electronic article surveillance and identification device,...

G - Physics

06

K

G06K 19/07 (2006.01) G06K 7/00 (2006.01) G08B 13/24 (2006.01)

Patent

CA 2403539

An electronic article surveillance and identification tag (1) and system is provided. The tag couples energy from a radiated energy source, which comprises first and second radiated signals. A mixing member (4) in the tag mixes the first and second signals to produce a sideband of the first signal, which is re-radiated by the tag. The mixing member is activated by a controller (6) that switches the mixing member into and out of the circuit according to a code stored within the controller that is associated with an article to be identified. As the mixing member is activated and deactivated, the sideband is radiated in a sequential manner according to the stored code. A receiver detects the sideband, and a decoder recovers the stored code according to the sequence of received sideband emissions from the tag.

L'invention concerne un système et une étiquette de surveillance et d'identification (1) électroniques d'articles. L'étiquette couple l'énergie provenant d'une source d'énergie rayonnée, qui comprend des premier et second signaux rayonnés. Un élément de mélange (4) placé dans une étiquette mélange les premier et second signaux afin de produire une bande latérale du premier signal, qui est à nouveau rayonné par l'étiquette. Ledit élément de mélange est activé par un contrôleur (6) qui commute l'élément de mélange dans un circuit ou à l'extérieur de celui-ci, en fonction d'un code associé à l'article à identifier stocké dans le contrôleur. Lorsque l'élément de mélange est activé ou désactivé, la bande latérale est rayonnée de manière séquentielle en fonction du code stocké. Un récepteur détecte la bande latérale, et un décodeur récupère le code stocké en fonction de la séquence des émissions de bande latérale reçues de l'étiquette.

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