Posture detector calibration and use
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United States of America Patent
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Feb 5, 2013
Grant Date -
May 24, 2007
app pub date -
Nov 18, 2005
filing date -
Nov 18, 2005
priority date (Note) -
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Abstract
Calibrating a posture detector for a patient's body involves measuring outputs of one or more sensors disposed in relation to the patient's body while the patient assumes a plurality of positions. A transfer matrix is formed having coefficients corresponding to the measured outputs. The transfer matrix defines a relationship between a coordinate system of the one or more sensors and a coordinate system of the patient's body. The body coordinate system is used as a reference coordinate system for posture detection. Posture, including tilt and/or tilt angle, may be determined based on first and second rotational angles defined in relation to the body coordinate system.
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