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Title:
TERRESTRIAL MAGNETISM MEASURING DEVICE, TERRESTRIAL MAGNETISM MEASURING METHOD AND TERRESTRIAL MAGNETISM MEASUREMENT PROGRAM
Document Type and Number:
Japanese Patent JP2012237704
Kind Code:
A
Abstract:

To detect a precise value of terrestrial magnetism.

A mobile phone 1 has a ROM30 which stores a terrestrial magnetism measurement program 100 having an initial value generation module 110 and a nonlinear Kalman filter module 120, a terrestrial magnetism detection part 70, an acceleration detection part 80 and an angular velocity detection part 90. The nonlinear Kalman filter module 120 executes a calculation of the nonlinear Kalman filter KF and estimates a state vector xk which includes a first variable ρ for expressing an intensity of terrestrial magnetism r and a second variable η for expressing an inclination of terrestrial magnetism θ as elements.


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Inventors:
HANDA IBUKI
Application Number:
JP2011108125A
Publication Date:
December 06, 2012
Filing Date:
May 13, 2011
Export Citation:
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Assignee:
YAMAHA CORP
International Classes:
G01C17/38; G01C17/32
Attorney, Agent or Firm:
Akira Obayashi
Yashiro Hitoshi
Taro Takahashi



 
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