| 摘要 |
PROBLEM TO BE SOLVED: To acquire correct position information with only few errors even in a position information acquisition system using GPS. SOLUTION: The position information acquisition system includes an RFID tag 41 arranged at an entrance of a field and having identification information ID; a tag reader 42 for reading the identification information ID of the RFID tag 41; a mobile station unit 43 for detecting measured self-position information on the basis of radio waves from an artificial satellite ST; an external server 44 for relating reference position information of the RFID tag 41 with identification information and previously storing it; and a controller 40 mounted to a tractor 1. The tag reader 42 and the mobile station unit 43 are mounted to the tractor 1. The controller 40 acquires the reference position information from the external server when the tractor 1 is at the entrance of the field, computes correction information on the basis of measured position information at the time and the reference position information, and computes current self-position information of the tractor 1 on the basis of the correction information and the measured position information. COPYRIGHT: (C)2007,JPO&INPIT |
