ARTICLE-TRACKING SYSTEM AND METHOD USING RFID TAGS

摘要

A control unit for tracking articles is positioned approximate to a package and communicates with a reader. The control unit includes a radio frequency identification (RFID) tag, a switch, a clock; and a microcontroller. The switch outputs a first control signal to the microcontroller when the package is opened. The microcontroller reads a real-time clock (RTC) signal from the clock according to the first control signal, and transmits an open status signal and the corresponding RTC signal to the RFID tag. The RFID tag feeds back the open status signal and the corresponding RTC signal to an RFID reader.