PROBLEM TO BE SOLVED: To estimate a current location of a moving beacon.SOLUTION: A distance estimation part is configured to calculate one of three areas including an immediate area where the distance between a beacon and a reception terminal for distance estimation is the shortest, a near area where the distance between the beacon and the reception terminal for distance estimation is longer than that in the immediate area, and a far area where the distance between the beacon and the reception terminal for distance estimation is longer than that in the near area as an estimated distance, and change the range of each of the three areas according to the magnitude of a radio field intensity corresponding to each reference intensity signal when receiving a plurality of types of reference intensity signals from the beacon within a prescribed time. A location estimation part is configured to obtain a plurality of annular zones each of which expresses an area around a location indicated by each location information, being apart from each location by each estimated distance or an overlapping estimated area A-L which is an area where circles overlap with each other, and obtain an estimated location A-L-C from the overlapping estimated area.SELECTED DRAWING: Figure 5
【課題】移動ビーコンの現在位置を推定する。【解決手段】距離推定部が、ビーコンと距離推定用受信端末との距離が最も近いimmediately領域、ビーコンと距離推定用受信端末との距離がimmediately領域より遠いnear領域、及びビーコンと距離推定用受信端末との距離がnear領域より遠いfar領域、の3つの領域の一つを推定距離として算出し且つ所定時間内にビーコンから複数種類のリファレンス強度信号を受信したときに、各リファレンス強度信号に対応する電波強度の大きさに応じて3つの領域の範囲をそれぞれ変化させるように構成され、位置推定部が、各位置情報が表す位置をそれぞれ中心とし且つ各位置から各推定距離だけ離れた領域を表す複数の環状帯又は円の互いに重なった領域である重なり推定領域A−Lを求め且つ重なり推定領域の中から推定位置A−L−Cを求めるように構成されている。【選択図】図5
MOVING BEACON LOCATION ESTIMATION SYSTEM
移動ビーコンの位置推定システム
01.03.2018
Patent
Elektronische Ressource
Japanisch
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