| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To inexpensively, quickly and surely detect tailgating. <P>SOLUTION: This invention has: an enhance and exit system 3 transmitting passing history information, for unlocking an electric lock of a door, when passing authority for permitting the passing is set in information, by reading the information stored in an authentication medium carried by a user; an in-house PHS system 2 transmitting area information on a detected area by detecting the existing area of a portable terminal of the user; and a tailgating detection system 1 detecting that there is tailgating when the predetermined relationship is realized between both, by receiving the passing history information transmitted from the access system 3 and the area information transmitted from the in-house PHS system 2. <P>COPYRIGHT: (C)2008,JPO&INPIT</p> |
