METHOD AND DEVICE FOR ESTIMATING AND DETECTING POSITION OF MOVING BODY ETC. AND PROGRAM OF METHOD FOR ESTIMATING AND DETECTING POSITION OF MOVING BODY ETC.

摘要

PROBLEM TO BE SOLVED: To provide a method and a device for estimating and detecting the position of a moving body etc. and a program of the method for estimating and detecting the position of a moving body etc. capable of estimating the closest approach position by using a magnetic field without repeated computation and, moreover, capable of estimating the closest approach position even if a magnetic field by a moving body is reduced.;SOLUTION: The method comprises: a magnetic field detecting step for detecting by a magnetic field detector 11 the magnetic field at each component in three axial directions that is generated by a cruising body 2 cruising on the sea surface or under the sea; a magnetic field correction processing step for determining a ratio (By'/Bt') of the lateral distance direction component to the size of the detected magnetic fields B by determining the lateral distance direction component that is orthogonal to the movement direction of the cruising body 2 and also parallel to the sea surface out of the detected magnetic fields B at least based on information on the movement direction of the cruising body 2; and a lateral position computing step for estimating the closest approach position between the cruising body and the magnetic field detector 11 based on the ratio (By'/Bt') of the lateral distance direction component.;COPYRIGHT: (C)2009,JPO&INPIT