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US 7,881,902 B1Granted
Human activity monitoring device
AssigneeDP Technologies, Inc.
InventorsPhilippe Kahn, Arthur Kinsolving, Mark Andrew Christensen, Brian Y. Lee, David Vogel
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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.
Claims11
A method comprising:
- detecting motion by an inertial sensor included in a mobile device;
- determining, by the mobile device, whether the motion has a motion signature indicative of a user activity that the mobile device is configured to monitor;
- when the motion does not have a motion signature of a user activity that the mobile device is configured to monitor, entering a sleep mode.
A method for a mobile device comprising:
- receiving acceleration data that meets stepping criteria from an accelerometer included in the mobile device;
- incrementing a step count in a step count buffer;
- when at least one of a) the step count is below a step count threshold, or b) a current user cadence fails to match a step cadence of a user profile, using a default step cadence window to identify a time frame within which to monitor for a next step;
- and
- when the step count is at or above the step count threshold, determining a dynamic step cadence window and using the dynamic step cadence window to identify the time frame within which to monitor for the next step.
2 more elements
Dependencies are inferred from the claim text.