| 摘要 |
<p>It is prevented that a third party tries to take occasion to intrude a room when the entrance control system operates and the door opens. The entrance control system (1) comprises a reader/writer (30) for reading a unique ID from a wireless IC tag (20) and measures the signal state when reading the unique ID, an imaging device (50) for imaging the door and near the door, and an entrance control device (10) judging whether or not the person can enter the room on the basis of the outputs from the reader/writer (30) and the imaging device (50). The entrance control device (10) judges whether or not the person has an entrance/exit right about the wireless IC tag (20) on the basis of the unique ID, computes the position and movement state of the wireless IC tag holder (201) from the signal state of when the unique ID is read, judges whether there is any wireless IC tag nonholder (202) or not from the image data outputted from the imaging device (50), and determines whether or not the pass point is brought into a pass permission state according to whether or not the person has a right to enter/exit the room, the position and movement state of the wireless IC tag holder (201), and whether or not there is any wireless IC tag nonholder (202).</p> |
