Patent ID: 7670303

Claim:
A body motion measuring apparatus comprising: body motion sensors, composite vector calculation means, composite vector determination means, angle calculation means, body motion output calculation means, and body motion counting means, wherein the body motion sensors detect the magnitudes of motions in different directions at a time, the composite vector calculation means calculates the size of a composite vector derived based on the relationship between the magnitudes of the motions in the directions detected by the body motion sensors, the composite vector determination means determines the adequacy of the size of the composite vector calculated by the composite vector calculation means, the angle calculation means calculates an angle derived based on the relationship between the magnitudes of the motions in the directions detected by the body motion sensors, when the size of the composite vector determined by the composite vector determination means is adequate, the body motion output calculation means calculates a body motion output derived from the relationship between the magnitudes of the motions in the directions detected by the body motion sensors and the angle by the angle calculation means, and the body motion counting means times predetermined elapsed time and counts a predetermined body motion based on the relationship between the body motion output calculated by the body motion output calculation means and the predetermined elapsed time.