POSITION ESTIMATION SYSTEM

• Main Authors: NAGURA TORU, HIRAYAMA YASUHIRO
• Format: Patent
• Language: English; Japanese
• Published: 02.07.2015
• Subjects: ANALOGOUS ARRANGEMENTS USING OTHER WAVES; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; GYROSCOPIC INSTRUMENTS; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION ORRERADIATION OF RADIO WAVES; MEASURING; MEASURING DISTANCES, LEVELS OR BEARINGS; NAVIGATION; PHOTOGRAMMETRY OR VIDEOGRAMMETRY; PHYSICS; RADIO DIRECTION-FINDING; RADIO NAVIGATION; SURVEYING; TESTING

PROBLEM TO BE SOLVED: To provide a position estimation system that can estimate a position even when not necessarily using a GPS.SOLUTION: A position estimation system comprises: a first device (3) that includes distance-metering signal transmission means (7) for transmitting a distance-metering signal, reflection wave reception means (7) for receiving a reflection wave, and relative position calculation means (7) for calculating a relative position of an object on the basis of the distance-metering signal and reflection wave; and a second device (5) that includes distance-metering signal detection means (19) for detecting the distance-metering signal, and position information transmission means (25) for transmitting position information as a detection condition of the distance-metering signal. The first device comprises: position information reception means (9) for receiving the position information; and absolute position calculation means (17) for, as a reception condition of the position information, calculating a relative position of the second device, and calculating an absolute position of the first device on the basis of the relative position and the position information. 【課題】ＧＰＳを必ずしも使用しなくても位置を推定できる位置推定システムを提供すること。【解決手段】測距用信号を送信する測距用信号送信手段（７）と、反射波を受信する反射波受信手段（７）と、測距用信号及び反射波に基づき、対象物の相対位置を算出する相対位置算出手段（７）とを備えた第１の装置（３）及び測距用信号を検出する測距用信号検出手段（１９）と、測距用信号の検出を条件として、位置情報を送信する位置情報送信手段（２５）とを備えた第２の装置（５）を含む位置推定システム（１）であって、第１の装置は、位置情報を受信する位置情報受信手段（９）と、位置情報の受信を条件として、第２の装置の相対位置を算出し、その相対位置及び位置情報に基づき、第１の装置の絶対位置を算出する絶対位置算出手段（１７）とを備えることを特徴とする位置推定システム。【選択図】 図１