| 摘要 |
An apparatus for providing and detecting information regarding a person, location, or object includes a power supply, a helicoil dipole antenna, a transmitter, a receiver configured to receive signals from remote transmitters at a designated frequency, a computer processor, and a memory device configured to store an identifier associated with the apparatus. Logic instructions embedded on the memory device are configured to compare an identifier decoded from received signals to the identifier associated with the apparatus. When the identifier decoded matches the identifier associated with the apparatus, the instructions decode a return frequency from the signal, and generate return signals. The return signals include the identifier associated with the apparatus, the transmitter is activated only when the transmitter transmits the return signals at the return frequency. |
