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System and method for calibrating an accelerometer

  • US 8,676,528 B2
  • Filed: 02/08/2011
  • Issued: 03/18/2014
  • Est. Priority Date: 02/08/2011
  • Status: Active Grant
First Claim
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1. A method of calibrating an accelerometer, the method comprising:

  • using at least a first magnetometer reading to detect that a first orientation is being maintained;

    obtaining a plurality of accelerometer readings at the first orientation;

    using at least one other magnetometer reading to detect that a plurality of additional orientations are being maintained and, for each additional orientation, obtaining a plurality of accelerometer readings at that additional orientation;

    determining calibration parameters comprising, for each axis of the accelerometer, at least one of a gain value and an offset value, using the plurality of accelerometer readings at the first and plurality of additional orientations; and

    applying the calibration parameters to subsequent accelerometer readings.

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