| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To independently set the cycle of detecting physical quantity or state and carrier sense cycle. <P>SOLUTION: In an active non-contact information storage device (206), a control part (210) operates a sensor part in a first prescribed period generated in a first cycle (Ts), and controls a memory to store required detection data from the sensor part as necessary, and operates a reception part in a second prescribed period generated in a second cycle (Tcs) by carrier-sensing the RF signal of a first frequency (f<SB>1</SB>). The control part disables a transmission part, reception part, sensor part and memory in a suspend period (51) which is intermittently generated in the first prescribed period and the second prescribed period. When the reception part carrier-senses the RF signal of the first frequency in one second prescribed period, the control part operates the reception part to receive an information request signal, and operates the transmission part to transmit the response signal of a second frequency (f<SB>2</SB>) for conveying data stored in the memory in response to the information request signal. <P>COPYRIGHT: (C)2009,JPO&INPIT</p> |
