| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a tag detection system, a moving object detection method, and an entrance/exit management system capable of detecting the specified object and person and its moving direction. <P>SOLUTION: Three antennas 11, 12, 13 are arranged with adjacency, and a part of each area of the three high-frequency magnetic fields A, B, C formed by the high-frequency magnetic field generated by the antennas 11, 12, 13 is made to be superimposed (interfered). Moreover, the superimposed areas AB, BC, in which each of the high-frequency magnetic fields A, B, C is superimposed, makes a pulse code modulation signal, different in a phase, to be superimposed and a detection blind area for an RFID tag 3. This can narrow the detection area for the RFID tag 3, in the high-frequency magnetic field B positioned in the middle to the high-frequency magnetic fields A, C on both sides among the three high-frequency magnetic fields A, B, C. Therefore, the moving direction of the RFID tag 3 can be detected by the signal constellation of A, B, C and only the specific person can be detected in the middle detection area. <P>COPYRIGHT: (C)2008,JPO&INPIT</p> |
