RFID Settlement Detection for Retail Exit Gate Accuracy

The patent introduces an intermediary RFID tag system that mediates between the settlement process and the exit gate detection. The RFID tag stores settlement information and can be read without destruction, allowing the gate to verify settlement status accurately without relying on the presence or absence of a destroyed IC tag. This intermediary solution resolves the contradiction by enabling both effective anti-theft measures and precise settlement status measurement.

The patent replaces the mechanical/physical destruction method of IC tags with an electronic information storage system using RFID tags. Instead of relying on physical destruction to indicate settlement, the system uses electronic data storage and reading to verify settlement status. This substitution maintains simplicity while dramatically improving reliability, as electronic reading is more reliable than physical destruction detection.

The patent implements a feedback mechanism where the RFID tag provides settlement information back to the exit gate. The gate reads the RFID tag information and uses this feedback to determine whether to activate the alarm. This feedback system allows the gate to distinguish between settled and unsettled commodities accurately, preventing false alarms while maintaining loss prevention, thereby resolving the contradiction between security and public confidence.