| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To configure a remote detection system, using small-sized tags and having a longer communication distance. <P>SOLUTION: A remote detection system 101 includes a reader/writer 30, active tags 40A, 40B and passive tags 50A to 50F. The reader/writer 30 communicates with the active tags 40A, 40B and reads detection data acquired by the active tags 40A, 40B. The active tags 40A, 40B detect the sensing information of the respective passive tags 50A to 50C, 50D to 50F, and transmits these data to the reader/writer 30. Each of the passive tags 50A to 50C, 50D to 50F includes a resonance circuit, resonating in a frequency band of radio waves for communication performed between the active tags 40A, 40B and the reader/writer 30, and an antenna connected to the resonant circuit. The active tags 40A, 40B analyze the frequency of reflected signals from the passive tags 50A to 50C, 50D to 50F and acquires the sensing information. <P>COPYRIGHT: (C)2011,JPO&INPIT</p> |
