SHELF-LIFE MONITORING SENSOR-TRANSPONDER SYSTEM

摘要

A perishable integrity indicator system (42) includes a RFID transponder (14)and a perishable integrity sensor (16). The RFID transponder includes a RF integrated circuit coupled with an antenna. The sensor monitors the time and temperature of the perishable. A freshness determining module receives time- and temperature-dependent measurement data from the perishable integrity sensor (16) and determines a current freshness status. A communications interface to the RFID transponder (14) permits RFID reader (40) to retrieve current freshness status data corresponding to the freshness status determined by the freshness determining module. The system further includes a power management module (32) .