Title:
LOCATION ESTIMATION SYSTEM
Document Type and Number:
Japanese Patent JP2017156102
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To enable a location of an object to be estimated without going through a step of accurately measuring an amount of Doppler shift of a radio signal and the like, and to greatly improve estimation accuracy.SOLUTION: A location estimation system comprises: a flying body 30 that consecutively receives a radio signal transmitted from a signal transmitter 20 attached to an object in a process of flying on a flight trajectory made externally controllable; an observation unit 33 that observes a relative change tendency with respect to a location of data about the radio signal received by the flying body 30; and a location estimation unit 35 that obtains a condition satisfaction location where the observed relative change tendency of the data satisfies pre-set condition, obtains the condition satisfaction location over three or more points from the relative change tendency observed over three or more times from the observation unit 33 in a process of making the flying body 30 fly on a mutually different flight trajectory, and estimates a location of the object on the basis of three-dimensional location information at respective condition satisfaction locations and an equation of three or more planes having a direction vector substituted.SELECTED DRAWING: Figure 3
Inventors:
MIURA RYU
TAKIZAWA KENICHI
HARA SHINSUKE
ONO FUMIE
TAKIZAWA KENICHI
HARA SHINSUKE
ONO FUMIE
Application Number:
JP2016036845A
Publication Date:
September 07, 2017
Filing Date:
February 29, 2016
Export Citation:
Assignee:
NAT INST INF & COMM TECH
International Classes:
G01S5/04
Domestic Patent References:
| JPH09329662A | 1997-12-22 | |||
| JP2004317157A | 2004-11-11 | |||
| JP2002267732A | 2002-09-18 | |||
| JP2005229449A | 2005-08-25 | |||
| JPS5994088A | 1984-05-30 | |||
| JP2005249629A | 2005-09-15 | |||
| JP2011112370A | 2011-06-09 |
Foreign References:
| WO2000014564A2 | 2000-03-16 |
Attorney, Agent or Firm:
Yasuhiko