Eas system with wide exit coverage and reduced over-range

Details Eas system with wide exit coverage and reduced over-range Eas system with wide exit coverage and reduced over-range

G - Physics

08

B

G08B 13/24 (2006.01)

Patent

CA 2406700

System for preventing detection stationary identification marker in a detection zone of an electronic article surveil-lance system. The system includes a transmitter for transmitting an exciter pulse for exciting an identification marker, and a receiver system for receiving a characteristic response energy emitted by an identification marker in an inhibit field of the detection zone and in a main area of said detection zone. A comparator system is provided for generating an alarm condition when the characteristic response energy received in the main area exceeds the characteristic response energy received in the inhibit field by a predetermined threshold value.

L'invention concerne un système empêchant la détection de marqueur d'identification stationnaire dans une zone de détection d'un système électronique de surveillance d'articles. Ledit système comprend un émetteur conçu pour émettre une impulsion d'excitation pour exciter un marqueur d'identification, et un système de réception pour recevoir une énergie de réponse caractéristique émise par un marqueur d'identification dans un champ d'inhibition de la zone de détection et dans une zone principale de ladite zone de détection. Un système comparateur est conçu pour générer un état d'alarme lorsque l'énergie de réponse caractéristique reçue dans la zone principale excède l'énergie de réponse caractéristique reçue dans le champ d'inhibition, d'une valeur seuil prédéterminée.

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