MODIFICATION OF TRIGGER THRESHOLDS OF RFID DEVICES IN AN ELECTRONIC ARTICLE SURVEILLANCE SYSTEM

• Main Author: FORSTER, Ian, J
• Format: Patent
• Language: English; French; German
• Published: 16.10.2024
• Subjects: ALARM SYSTEMS; ORDER TELEGRAPHS; PHYSICS; SIGNALLING; SIGNALLING OR CALLING SYSTEMS

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.