Method and arrangement for determining movement
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United States of America Patent
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Jan 3, 2006
Grant Date -
Jun 12, 2003
app pub date -
Jun 27, 2002
filing date -
Jun 29, 2001
priority date (Note) -
In Force
status (Latency Note)
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Abstract
To determine the movement of a device, a three-dimensional measurement of the device's acceleration is provided in known directions with regard to the device, and average signals of acceleration signals parallel to different axes are formed to allow tilt angles of the device with respect to gravity to be defined. Acceleration change signals are formed by removing the average signals from their respective acceleration signals parallel to the different axes. The acceleration change signals and the tilt angles of the device are used for forming a component of the acceleration change of the device, which component is parallel to gravity and independent of the position of the device.
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