| 摘要 |
An RFID tag 100 can determine its own relative movement with respect to a reader 200. The tag can responsively alter its read-state to thereby permit the RFID tag to respond to a subsequent read inquiry. By one approach the tag assesses its own movement by monitoring the strength of its received power signal 203. By another approach, the RFID tag has a power source that becomes electrically charged via radio-frequency energy received by the tag antenna, and that power source is configured to become operably discharged at a point in time that corresponds to a typical null-sensing duration of time 609 for a given application setting for that RFID tag. |
