SYSTEM AND METHOD FOR DETECTING DEVIATIONS IN NOMINAL GAIT PATTERNS
First Claim
1. A system for determining a deviation in a nominal gait pattern of an individual, comprising:
- a multi-axis accelerometer;
a processor coupled to said multi-axis accelerometer for analyzing measurements collected by said multi-axis accelerometer;
an extraction component coupled to said processor for extracting current gait features associated with measurements analyzed by said processor;
a memory component for storing extracted gait feature statistics; and
a detection component coupled to said extraction component and said processor for comparing said current gait features to extracted gait feature statistics accumulated in said memory component.
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Abstract
A monitoring device having a system and method for detecting deviations in nominal gait patterns is provided. The monitoring device is configured for at least partial insertion within an auditory canal of an individual. The system employed in the monitoring device is comprised of at least an accelerometer configured for measuring acceleration in three orthogonal directions aligned with the principal directions of the body. Gait features values are extracted from the measurements and continuously accumulated, thereby establishing the nominal gait pattern of the individual. Subsequent extractions of current gait features are compared to accumulated gait feature statistics to determine if a deviation in the established nominal gait pattern has been detected.
60 Citations
27 Claims
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1. A system for determining a deviation in a nominal gait pattern of an individual, comprising:
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a multi-axis accelerometer;
a processor coupled to said multi-axis accelerometer for analyzing measurements collected by said multi-axis accelerometer;
an extraction component coupled to said processor for extracting current gait features associated with measurements analyzed by said processor;
a memory component for storing extracted gait feature statistics; and
a detection component coupled to said extraction component and said processor for comparing said current gait features to extracted gait feature statistics accumulated in said memory component. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A method for determining a deviation in a nominal gait pattern of an individual, comprising:
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measuring acceleration in three orthogonal directions aligned with principal directions of said individual'"'"'s body;
estimating position, velocity and acceleration of said individual'"'"'s body;
extracting current gait features associated with said estimations; and
comparing said extracted current gait features with stored gait feature statistics to determine the existence of said deviation. - View Dependent Claims (20, 21, 22, 23, 24, 25, 26)
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27. A system for accumulating gait feature statistics to derive a nominal gait pattern of an individual, comprising:
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a multi-axis accelerometer;
a processor coupled to said multi-axis accelerometer for analyzing measurements collected by said multi-axis accelerometer; and
an extraction component coupled to said processor for extracting current gait features associated with measurements analyzed by said processor.
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Specification