Title:
電子コンパス及び全オリエンテーション動作に対する大磁気誤差の補償
Document Type and Number:
Japanese Patent JP4093861
Kind Code:
B2
Abstract:
A three-axis algebraic model is used to numerically compensate for magnetic errors in measured magnetic field values in an electronic compass for any orientation of the compass. This model is based on physical principles and uses a linear algebra approach that facilitates computation of the parameters needed for compensation. During a calibration procedure of the electronic compass, magnetic and gravity fields are measured in three axes at each of a variety of combinations of orientations and azimuths. This set of measured magnetic and gravity fields is used to calculate a matrix compensation coefficient and a vector compensation coefficient using a system of equations. These compensation coefficients are stored and then used during normal operations of the electronic compass to correct all subsequently measured magnetometer data to obtain corrected values for the Earth's magnetic field, from which the correct azimuth can be calculated.
Inventors:
Smith, robert bee
Elgar Suma, Mike
Morton, Blaze Grayson
Elgar Suma, Mike
Morton, Blaze Grayson
Application Number:
JP2002548386A
Publication Date:
June 04, 2008
Filing Date:
November 28, 2001
Export Citation:
Assignee:
Honeywell International Inc.
International Classes:
G01C17/38
Domestic Patent References:
| JP8285634A | ||||
| JP9325029A | ||||
| JP1500618A |
Foreign References:
| US5682335 |
Attorney, Agent or Firm:
Kazuo Shamoto
Tadashi Masui
Yasushi Kobayashi
Akio Chiba
Hiroyuki Tomita
Fumitoshi Nishiyama
Tadashi Masui
Yasushi Kobayashi
Akio Chiba
Hiroyuki Tomita
Fumitoshi Nishiyama