RFID SYSTEM WITH LOCATION CAPABILITY

摘要

Provided are RFID systems, methods and RFID tags according to various aspects. An infrared (IR) beam, from an IR transmitter, is outputted in a first direction so that an RFID tag with an IR sensor adds a flag to stored data in the RFID tag in response to the RFID tag's IR sensor detecting the IR beam. An RF interrogation signal is outputted by an RFID reader, and a response is received from the RFID tag to the RF interrogation signal. It is determined whether the flag is contained in the RFID tag's response to the RF interrogation signal, and if so, the RFID tag is determined to be in the first direction relative to the IR transmitter.

主权项

1. A radio frequency identification (RFID) reader comprising:
an infrared (IR) transmitter configured to output an IR beam in a first direction that causes an RFID tag to add a flag to stored RFID data in the RFID tag; a transmit antenna to output an RF interrogation signal; a receive antenna to receive a response containing the stored data from an RFID tag to the RF interrogation signal; and a processor configured to determine that the RFID tag is in the first direction if the response contains the flag, wherein the IR beam is such that, in response to an IR sensor of the RFID tag detecting the IR beam, the RFID tag's IR sensor adds a flag to stored data in the RFID tag.