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ACCELEROMETER-ONLY CALIBRATION METHOD

  • US 20110077891A1
  • Filed: 09/25/2009
  • Published: 03/31/2011
  • Est. Priority Date: 09/25/2009
  • Status: Abandoned Application
First Claim
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1. A method for calibrating an accelerometer without needing to use external assistance signals, said accelerometer having a bias, said bias being a zero offset for measurements by said accelerometer, said method comprising:

  • moving said accelerometer, wherein the orientation of the axis of said accelerometer changes with respect to the local gravity vector;

    collecting accelerometer measurements as said accelerometer is moving; and

    calculating said bias;

    wherein said accelerometer measurements are primarily due to local gravity.

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