| 摘要 |
An RFID-based sensor includes a plurality of discrete sensor elements. Each sensor element changes conductivity state based on exposure of the sensor to a physical condition. An RFID circuit coupled to the plurality of sensor elements transmits a code corresponding to the conductivity states of the of sensor elements. The code may comprise the identification code of the RFID circuit. A level of exposure to the condition or a duration of exposure to the condition may be indicated by the code. Each of the sensor elements may be sensitive to a distinct condition and the code may indicate exposure to each of the distinct conditions. The code may indicate a prior exposure to a condition or may indicate a present exposure to the condition.
|
