ACTIVITY METER AND SLEEP/AWAKE STATE RECORDING SYSTEM

摘要

According to an embodiment, an activity meter includes an acceleration sensor configured to detect acceleration in at least one axis direction, an acceleration energy detection section configured to detect acceleration energy based on an acceleration signal of the acceleration sensor and a control section. The control section determines removal of the activity meter from a target person based on acceleration energy detected by the acceleration energy detection section and an acceleration component in a direction of gravity in the acceleration signal of the acceleration sensor.