A METHOD AND APPARATUS FOR determining DIRECTIONS OF forward, backward, left and right In POSTURE SENSOR worn on the user’s head

摘要

The present invention comprises the steps of measuring a first acceleration at a time point when a user gazes at the front by an acceleration sensor mounted on the head; Measuring a second acceleration from the acceleration sensor at a point in time when the user gazes at an angle other than the front side; Measuring a first gravitational vector and a second gravitational vector corresponding to a time point at which the first and second accelerations are measured when the fluctuation indicators of the first acceleration and the second acceleration satisfy a predetermined condition; And calculating the left and right direction vectors and the front and rear direction vectors by external product of the first gravity vector and the second gravity vector at least once. Provides a way to determine the direction.