Calibrating method for calibrating step counter fixed at e.g. belt of chronic sick patient for detecting movement of patient, during movement conditions in medical area, involves determining phase angle between for determining signal

摘要

The method (10') involves measuring acceleration signals (30, 40) in dependence of acceleration parallel to two directions, respectively, where the acceleration signals are produced using an acceleration sensor and/or rotary rate sensors. Acceleration vectors are determined from an angle between the acceleration signals. A phase angle (60) between the acceleration vectors and one of the directions are determined for determining a calibration signal. A direct component in the phase angle is determined and removed using high pass techniques. Independent claims are also included for the following: (1) an operating method for the movement sensor (2) a movement sensor or a step counter that is calibrated using the method.