| 摘要 |
<P>PROBLEM TO BE SOLVED: To precisely specify a position of an IC tag attached to a mobile body in a construction site. <P>SOLUTION: A plurality of IC tags 21 in which proper tag IDs are stored are arranged at fixed positions in the construction site 1 and an IC tag 22 is also attached to the mobile body. A reader device 30 reads the tag ID from the mobile tag (22), read the tag ID from the fixed tag 21, and transmits the read tag ID to a management device 10. The management device 10 receives the tag ID from the reader device, reads positional information corresponding to the tag ID that is the fixed tag from a fixed tag information database 152, and specifies an area where the mobile tag may be positioned in the construction site 1 on the basis of the read positional information. <P>COPYRIGHT: (C)2008,JPO&INPIT |
