Patent ID: 9241658
Filing Date: 2016-01-26
CPC Classification: A61B,G16H

Claim Text:
1. A method for personal fatigue risk management, performed using a smartwatch including a digital processor, associated memory, and an accelerometer for measuring acceleration in X, Y, and Z axes, the method comprising: a) receiving a signal from the accelerometer indicating an acceleration of the smartwatch and calculating a displacement or change in position of the smartwatch based on this acceleration, the extent of displacement or change in position represented by a movement value; b) storing the movement value and an indicia of the time at which the signal was received in a time-stamped bin, the time-stamped bin stored in memory locations within the associated memory; c) repeating steps a) and b) to obtain a plurality of stored movement values for a predetermined time interval; d) analyzing the plurality of stored movement values, using a state algorithm, to determine a sleep state value, an off-wrist state value or a wake state value for a person wearing the smartwatch for the predetermined time interval; e) repeating steps a) through d) to obtain a plurality of sleep state values, wake state values, and/or off-wrist state values; f) receiving a task input or a location input indicative of an activity being performed by a wearer of the smartwatch; g) analyzing a plurality of the sleep state values and wake state values, using a fatigue risk algorithm, to determine fatigue risk values, the fatigue risk values determined using at least the plurality of sleep state values, wake state values and off-wrist state values, and the task input or the location input indicative of the activity being performed by the wearer of the smartwatch; h) determining a probable relative risk of errors and incidents indicative of at least a probability of having an error, incident, or accident that is caused at least in part by fatigue as compared to an average risk of errors and incidents for the wearer of the smartwatch, using at least a comparison of the fatigue risk values with a reference index based at least on an aggregate of fatigue-related risk data collected for a plurality of other users and the activity being performed by the wearer of the smartwatch; and i) electronically causing a warning to be issued, via electronic components of the smartwatch, when the probable relative risk of errors and incidents as compared to the average risk of errors and incidents breaches one or more predetermined thresholds for the activity being performed by the wearer of the smartwatch, wherein the warning includes a display indicating one or more corrective actions, the one or more corrective actions selected based on the activity being performed by the wearer of the smartwatch.