| 摘要 |
<P>PROBLEM TO BE SOLVED: To properly show action to be taken when an object not having authority to enter enters or approaches a specific area. Ž<P>SOLUTION: An area entry/exit management device determines an alarm level based on an overlap area between an influence area AR1 set based on a position and a velocity vector of the object OB1, and an entry/exit area α that is an area set with the authority of the entry of the object OB1 according to an attribute of the object OB1, and outputs an alarm of the determined alarm level by a wireless device 120 portably carried or possessed by the object OB1. Thereby, the object OB1 can decide a direction to which oneself has to advance so as not to enter the entry/exit area α and a direction to which oneself has to advance so as to exit from the entry/exit area α when oneself has entered, based on the alarm level of the alarm output from the wireless device 120. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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