Patent ID: 7212943

Claim:
A body motion detection device configured to be attached to a forearm of a human body to detect a body motion of the human body, comprising: a body motion sensor unit configured and arranged to detect an acceleration caused substantially by a movement of the forearm during walking and an acceleration caused substantially by a movement of the forearm during running to output at least one body motion signal, said body motion sensor unit including a first acceleration sensor configured and arranged to detect said acceleration caused by the movement of the forearm during walking and output a first body motion signal, a second acceleration sensor configured and arranged to detect said acceleration caused by the movement of the forearm during running and output a second body motion signal; and a body motion component extracting section configured and arranged to extract a body motion component from said at least one body motion signal, said body motion component extracting section configured and arranged to extract said body motion component based on said first and second body motion signals, said body motion component being configured to be utilized to determine pitch to be used to calculate the number of a user's steps to be displayed to said user or to be stored.