Method for acceleration estimation, acceleration estimating apparatus, and mobile terminal
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United States of America Patent
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Aug 27, 2013
Grant Date -
Jun 28, 2007
app pub date -
Feb 15, 2007
filing date -
Sep 7, 2004
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Abstract
Acceleration and attitude angles are measured by sensors mounted on a moving object and the measurement results are collected. The measurement results of acceleration are separated into low-frequency acceleration components and high-frequency acceleration components, and a time-rate-of-changes of attitude angles are calculated based on the measurement results of the attitude angles. After finishing extraction of the high-frequency acceleration components and the low-frequency acceleration components, and finishing calculation of the time-rate-of-changes of attitude angles, the rotation contributing acceleration and translation contributing acceleration are estimated based on the high-frequency acceleration components, the low-frequency acceleration components, the attitude angles and the time-rate-of-change of attitude angles. As a result, a translation contributing acceleration which contributes to a translational movement of a moving object, and a rotation contributing acceleration which contributes to a rotational movement of the moving object are estimated with improved accuracy.
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