| 摘要 |
<p>PURPOSE:To enable selection of numerous responders by arranging the responders to be activated using energy alone of an energy radio wave transmitted from a transmitter/receiver so that it returns a response radio wave according to a calling ratio wave transmitted from the transmitter/receiver. CONSTITUTION:Responders 2 are mounted on respective specified objects to be inspected and a processing circuit 5 of a transceiver 1 controls a transmitter 3 to transmit a plurality of radio waves varied in frequency sequentially therefrom 3. A receiver 6 of the responder 2 receiving the radio wave from the transceiver 1 converts the radio wave inputted into an electrical signal to supply a part of an electric charge generated by the electrical signal to a power source 7. At the same time, the receiver 6 outputs the electrical signal to a processing circuit 8, which in turn, returns a ratio wave of a specified frequency through a transmitter 9. When a receiver 4 receives the radio wave from the transmitter 9, the processing circuit 5 identifies one among the plurality of responders 2 from the frequency of the radio wave transmitted and reception information inputted from the receiver 4.</p> |
