Patent ID: 9489600
Filing Date: 2016-11-08
CPC Classification: A61B,G06K

Claim Text:
1. A method for determining activity of a user having a mobile element coupled thereto, the mobile element comprising at least one motion sensor comprising an accelerometer having at least two measurement axes, the method comprising: using the mobile element to measure movement of the user along the at least two axes to generate a corresponding signal S(n) by the motion sensor at discrete times from zero to N when the mobile element is in a state E(n) characterizing a posture of the user; filtering the signal S(n) to obtain a first component y(n) of high-frequency portions of the signal S(n), said high frequency portions being above a first frequency threshold on each axis of the motion sensor, and a second component x(n) of low frequency portions of the signal S(n), said low frequency portions being below a second frequency threshold lower than the first frequency threshold on at least one axis of the motion sensor; calculating by a processor a combination θ(n) of a norm of the first component and a contribution of the second component; determining by the processor a list of the most likely states E(k