Calibration of a chest-mounted wireless sensor device for posture and activity detection
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United States of America Patent
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Apr 25, 2017
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app pub date -
May 22, 2013
filing date -
Jul 12, 2012
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Abstract
A method and system for calibrating a wireless sensor device are disclosed. In a first aspect, the method comprises determining a vertical calibration vector and determining a rotation matrix using the vertical calibration vector to line up native axes of the wireless sensor device with body axes. In a second aspect, a wireless sensor device comprises a processor and a memory device coupled to the processor, wherein the memory device includes an application that, when executed by the processor, causes the processor to determine a vertical calibration vector and to determine a rotation matrix using the vertical calibration vector to line up native axes of the wireless sensor device with body axes.
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