System and method of biomechanical posture detection and feedback including sensor normalization
First Claim
1. A method comprising:
- capturing, by a tri-axial accelerometer attached to a user, first set of tri-axial accelerometer data over a first period of time while the user is in a first movement state;
averaging the captured first tri-axial accelerometer data and creating a first normalization matrix;
capturing, by the tri-axial accelerometer attached to the user, second set of tri-axial accelerometer data over a second period of time, while the user is in a second movement state;
averaging the captured second tri-axial accelerometer data and creating a second normalization matrix;
capturing, by the tri-axial accelerometer attached to the user, third tri-axial accelerometer data at a third point in time;
creating, by the microprocessor, normalized accelerometer data by applying the first normalization matrix and the second normalization matrix to the captured third tri-axial accelerometer data; and
analyzing at least the normalized accelerometer data and determining a current movement state by detecting at least one transition between two movement states.
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Abstract
A system and method are described herein for a sensor device which biomechanically detects in real-time a user'"'"'s movement state and posture and then provides real-time feedback to the user based on the user'"'"'s real-time posture. The feedback is provided through immediate sensory feedback through the sensor device (e.g., a sound or vibration) as well as through an avatar within an associated application with which the sensor device communicates. The sensor device detects the user'"'"'s movement state and posture by capturing data from a tri-axial accelerometer in the sensor device. Streamed data from the accelerometer is normalized to correct for sensor errors as well as variations in sensor placement and orientation. Normalization is based on accelerometer data collected while the user is wearing the device and performing specific actions.
64 Citations
20 Claims
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1. A method comprising:
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capturing, by a tri-axial accelerometer attached to a user, first set of tri-axial accelerometer data over a first period of time while the user is in a first movement state; averaging the captured first tri-axial accelerometer data and creating a first normalization matrix; capturing, by the tri-axial accelerometer attached to the user, second set of tri-axial accelerometer data over a second period of time, while the user is in a second movement state; averaging the captured second tri-axial accelerometer data and creating a second normalization matrix; capturing, by the tri-axial accelerometer attached to the user, third tri-axial accelerometer data at a third point in time; creating, by the microprocessor, normalized accelerometer data by applying the first normalization matrix and the second normalization matrix to the captured third tri-axial accelerometer data; and analyzing at least the normalized accelerometer data and determining a current movement state by detecting at least one transition between two movement states. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A postural feedback apparatus comprising:
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a tri-axial accelerometer configured to be attached to a user, the tri-axial accelerometer configured to; capture tri-axial accelerometer data over a first period of time while the user is in a first movement state, capture a second set of tri-axial accelerometer data over a second period of time while the user is in a second movement state, and capture real-time tri-axial accelerometer data over a third period of time; a microprocessor configured to; average the captured first tri-axial accelerometer data and create a first normalization matrix, average the captured second tri-axial accelerometer data and create a second normalization matrix; create normalized accelerometer data by applying the first normalization matrix and the second normalization matrix to the real-time tri-axial accelerometer data; and analyze at least the normalized accelerometer data and determine a current movement state by detecting at least one transition between two movement states. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20)
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Specification