Method of correcting the orientation of a freely installed accelerometer in a vehicle
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United States of America Patent
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Feb 28, 2017
Grant Date -
Apr 4, 2013
app pub date -
Oct 1, 2012
filing date -
Sep 30, 2011
priority date (Note) -
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Abstract
A vehicle monitoring system includes an accelerometer installed in the vehicle in an unknown orientation. The system infers the orientation of the accelerometer in the vehicle from the acceleration signals. The proposed method detects and corrects the orientation in two steps. In the first step, the gravity vector is used to estimate the orientation in the vertical plane. Then, based on the acceleration data collected during the vehicle movement, the heading of the vehicle is estimated and the orientation within the horizontal plane is corrected.
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