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AssigneeAvery Dennison Retail Information Services LLC
InventorIan J. Forster
Estimating the term…
Electronic surveillance article systems reducing the number and likelihood of false alarms are provided. Such systems include two read zones, with a second read zone having an associated RFID reader configured to detect an RFID device at a trigger threshold. The trigger threshold may be set or modified in view of a value of a sensor of an RFID device (sensing a capacitance or dielectric permittivity or temperature or degree of movement, for example), the number of times the RFID device is detected in the first read zone, or whether the RFID device is detected in the first read zone under predetermined conditions. Such systems may also or alternatively initiate a response (e.g., modifying the trigger threshold or the amount of power transmitted by an RFID reader) when an RFID guard device associated with a piece of infrastructure in the first read zone is detected in the second read zone.
An electronic article surveillance system, comprising:
A method of controlling an electronic article surveillance system including a controller, a first Radio-Frequency Identification (RFID) reader associated with a first read zone, a second RFID reader associated with a second read zone, a piece of infrastructure having an associated RFID guard device and configured to support and/or display at least one piece of inventory that is removably associated with the piece of infrastructure, and an RFID device associated with the piece of inventory at a trigger threshold, wherein the RFID device comprises a sensor configured to measure a capacitance value of the RFID device, and wherein the RFID device is configured to auto-tune by varying its capacitance to optimize performance of the RFID device based on proximity of materials;
Dependencies are inferred from the claim text.