DETECTION OF VOLATILE CHEMICALS USING AN RFID SENSING SYSTEM

摘要

Methods, systems, and apparatuses, including computer programs encoded on computer-readable media, for monitoring volatile chemicals. A system includes an radio-frequency identification (RFID) tag composed of a patterned metal. The patterned metal is configured to absorb a volatile chemical. The RFID tag includes a non-volatile memory configured to store identification data. The RFID tag also includes a receiver that receives a signal at a frequency in a frequency range. The frequency is based upon an amount of the volatile chemical absorbed in the patterned metal. A transmitter of the RFID tag transmits the identification data in response to receiving the signal. The strength of the transmitted identification data is based upon an amount of the absorbed volatile chemical.

主权项

1. A non-transitory computer-readable medium comprising instructions stored thereon, the instructions comprising:
instructions to broadcast a request signal over a request frequency range; instructions to receive a first response from a radio-frequency identification (RFID) tag in response to broadcasting the request signal at a first request frequency within the request frequency range, wherein the RFID tag is composed of a patterned metal, and wherein the patterned metal absorbs a first volatile chemical; and instructions to determine a level of the first volatile chemical absorbed in the patterned metal based upon the first request frequency.