| 摘要 |
PROBLEM TO BE SOLVED: To improve the positioning accuracy by reducing errors in positioning with an actual position of a measurement terminal which receives a radio signal, without narrowing the area of the radio signal where a reference station transmits a reference position.SOLUTION: A measurement terminal includes a relative travel amount measurement part 11, an acquisition part 14, a clock part 18, a storage part 10, a control part 17 and a communication part 13. The control part 17 associates a signal strength measured concerning information on positioning reference position acquired by the acquisition part 14 with a time timed at that moment by the clock part 18 so as to store them in the storage part 10, and transmits a piece of information on the positioning reference position at a time when a signal strength superior to those in a plurality of pieces of information having the same positioning reference position which are stored at different timing in the storage part 10 is acquired to an information processor 300 via the communication part 13.SELECTED DRAWING: Figure 2 |
