MOTION DETECTION DEVICE, ELECTRONIC DEVICE, MOTION DETECTION METHOD, AND PROGRAM STORAGE MEDIUM

摘要

A motion detection device includes: an acceleration detection unit, a separating unit, a gravity axis determination unit, and a motion detection unit. The acceleration detection unit detects acceleration components of each axis of a three-dimensional rectangular coordinate system of acceleration acting on the acceleration detection unit and outputs sets of acceleration component data. The separating unit separates the outputted sets of acceleration component data into stationary components and motion components. The gravity axis determination unit determines an axis whose separated stationary component is the largest to be a gravity axis. The motion detection unit detects, if an axis corresponding to a largest motion component showing a largest value of the separated motion components is an axis other than the determined gravity axis, a motion axis of the acceleration detection unit on the basis of the largest motion component.

主权项

1. A motion detection device comprising:
a separating unit that receives sets of acceleration component data for each axis of a three-dimensional rectangular coordinate system, the sets of acceleration component data expressing an acting acceleration, and separates the sets of acceleration component data into stationary components obtained by subjecting the outputted sets of acceleration component data to low-pass filter processing and motion components obtained by subtracting the stationary components from the sets of acceleration component data; a gravity axis determination unit that determines an axis whose separated stationary component is the largest to be a gravity axis; and a motion detection unit which, in a case in which an axis corresponding to a largest motion component showing a largest value of the separated motion components is an axis other than the determined gravity axis, detects a motion axis of the acting acceleration on the basis of the largest motion component.