Body movement detector, body movement detection method and...

Details Body movement detector, body movement detection method and... Body movement detector, body movement detection method and...

2011-07-19

2011-07-19

Dunn, Drew A (Department: 2857)

Data processing: measuring, calibrating, or testing

Measurement system

Accelerometer

Reexamination Certificate

active

07983872

ABSTRACT:
A vertical component is extracted from an acceleration vector corresponding to body movement of a user from a three-axis acceleration sensor, and the vertical-component is separated by a high-band/low-band separating unit into a high-band component and a low-band component. Using these components, a peak detection/determination processing unit detects a peak-position candidate of action of the user in the vertical direction, identifies a peak-position candidate on the basis of an energy ratio between the high-band component and the low-band component, performs waveform matching regarding a predetermined range including each peak-position candidate, thereby determining a peak position, and detects body movement on the basis of the peak position, and a step-position analyzing unit detects a body-movement pitch.

REFERENCES:
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patent: 2006 175206 (2006-07-01), None
patent: 2006 293861 (2006-10-01), None

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