×

Method for acceleration estimation, acceleration estimating apparatus, and mobile terminal

  • US 20070146323A1
  • Filed: 02/15/2007
  • Published: 06/28/2007
  • Est. Priority Date: 09/07/2004
  • Status: Active Grant
First Claim
Patent Images

1. A method for acceleration estimation of estimating a translation contributing acceleration which contributes to a translational movement of a moving object in a measurement result of acceleration along at least two axial directions from among a first axis, a second axis which is orthogonal to the first axis, and a third axis which is orthogonal to the first axis and the second axis, which are defined peculiarly for the moving object, and a rotation contributing acceleration which contributes to a rotational movement, comprising steps of:

  • collecting a measurement result of acceleration along the two axes, and a measurement result of an attitude angle which is an angle of rotation from a reference attitude of the moving object;

    separating an acceleration frequency in a low-frequency acceleration component and a high-frequency acceleration component in the measurement result of the acceleration along the two axes;

    deriving a rate of change of attitude angle at which a time rate of change of the attitude angle is derived; and

    estimating the translation contributing acceleration and the rotation contributing acceleration based on the high-frequency acceleration component, the low-frequency acceleration component, the attitude angle, and the time rate of change of the attitude angle.

View all claims
  • 3 Assignments
Timeline View
Assignment View
    ×
    ×