Patent ID: 9588135
Date: 2017-03-07
CPC Classifications: G01P,G08B

Claim:
1. A method for fall detection of a user, the method comprising: determining whether first or second magnitude thresholds are satisfied; if the first or second magnitude thresholds are satisfied, determining whether an acceleration vector of the user is at a predetermined angle to a calibration vector or whether the user is at a stooped posture; and if the acceleration vector of the user is at the predetermined angle to the calibration vector or if the user is at the stooped posture, determining whether an activity metric is satisfied, wherein if a moving average of the user is greater than a predetermined activity level, the activity metric is not satisfied and notification information of the fall detection is disregarded, wherein if the moving average of the user is lesser than the predetermined activity level, the activity metric is satisfied and the notification information of the fall detection is confirmed, wherein determining whether first or second magnitude thresholds are satisfied further comprises: obtaining an acceleration sample from the user; comparing the acceleration sample to a first acceleration threshold; wherein if the acceleration sample is less than the first acceleration threshold, the first magnitude threshold is satisfied, else comparing the acceleration sample to a second acceleration threshold; wherein if the acceleration sample is greater than the second acceleration threshold, the second magnitude threshold is satisfied, and wherein comparing the acceleration sample to the first acceleration threshold further comprises: applying two filters to the acceleration sample to output an acceleration vector; calculating L comparing the acceleration scalar to the first acceleration threshold.