PORTABLE DEVICE FOR ESTIMATING ASCENDING/DESCENDING MOVEMENT STATE BY USING ATMOSPHERIC PRESSURE SENSOR, PROGRAM, AND METHOD

摘要

PROBLEM TO BE SOLVED: To provide a portable device capable of estimating an ascending/descending state of a user with an accuracy as high as possible by using an atmospheric pressure sensor mounted on the portable device, and the like.

SOLUTION: A portable device includes: atmospheric pressure change storage means 113 for preliminarily storing an average vuand a variance σu2based on an atmospheric pressure change speed in an ascending/descending state for each ascending/descending state; atmospheric pressure change detection means 111 for detecting whether or not atmospheric pressure changes at a prescribed threshold value or larger within a prescribed time range, about atmospheric pressure values along with temporal progression measured by an atmospheric pressure sensor 101; atmospheric pressure change speed calculation means 112 for calculating an atmospheric pressure change speed v at the atmospheric pressure value when the atmospheric pressure value is determined to be true by the atmospheric pressure change detection means; and ascending/descending state estimation means 114 for calculating a normal probability distribution at the atmospheric pressure change speed v for each ascending/descending state by using the average vuand the variance σu2stored in the atmospheric pressure change storage means, and estimating an ascending/descending state in which a probability value is the highest as the ascending/descending state.

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