Human activity monitoring device
DC CAFCFirst Claim
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1. A method of monitoring human activity using an inertial sensor, comprising:
- assigning a dominant axis with respect to gravity based on an orientation of the inertial sensor;
detecting a change in the orientation of the inertial sensor and updating the dominant axis based on the change; and
counting periodic human motions by monitoring accelerations relative to the dominant axis by counting the periodic human motions when accelerations showing a motion cycle that meets motion criteria is detected within a cadence window; and
updating the cadence window as actual cadence changes.
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Abstract
A method for monitoring human activity using an inertial sensor includes continuously determining an orientation of the inertial sensor, assigning a dominant axis, updating the dominant axis as the orientation of the inertial sensor changes, and counting periodic human motions by monitoring accelerations relative to the dominant axis.
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Citations
19 Claims
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1. A method of monitoring human activity using an inertial sensor, comprising:
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assigning a dominant axis with respect to gravity based on an orientation of the inertial sensor; detecting a change in the orientation of the inertial sensor and updating the dominant axis based on the change; and counting periodic human motions by monitoring accelerations relative to the dominant axis by counting the periodic human motions when accelerations showing a motion cycle that meets motion criteria is detected within a cadence window; and updating the cadence window as actual cadence changes. - View Dependent Claims (2, 3, 4)
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5. A method of monitoring human activity using an inertial sensor, comprising:
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buffering a plurality of periodic human motions, each periodic human motion comprising a motion cycle; identifying a number of periodic human motions within an appropriate cadence window; counting each of the periodic human motions to enable the monitoring of human activity; and updating the cadence window as a cadence of the motion cycle changes. - View Dependent Claims (6, 7, 8, 9)
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10. An inertial sensor based device, comprising:
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a dominant axis logic to determine an orientation of a device with respect to gravity, to assign a dominant axis, and to update the dominant axis when the orientation of the device changes; and a counting logic to count periodic human motions by monitoring accelerations relative to the dominant axis by counting the periodic human motions when accelerations showing a motion cycle that meets motion criteria is detected within a cadence window; and a cadence logic to update the cadence window as actual cadence changes. - View Dependent Claims (11, 12, 13)
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14. A non-transitory machine readable medium containing executable computer program instructions which, when executed by a processing system, cause said system to perform a method for:
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assigning a dominant axis with respect to gravity based on an orientation of the inertial sensor; detecting a change in the orientation of the inertial sensor and update the dominant axis based on the change; and counting periodic human motions by monitoring accelerations relative to the dominant axis by counting the periodic human motions when accelerations showing a motion cycle that meets motion criteria is detected within a cadence window; and updating the cadence window as actual cadence changes. - View Dependent Claims (15, 16, 17, 18, 19)
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Specification