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Method and apparatus to detect platform stationary status using three-axis accelerometer outputs

  • US 20100312473A1
  • Filed: 06/09/2009
  • Published: 12/09/2010
  • Est. Priority Date: 06/09/2009
  • Status: Active Grant
First Claim
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1. A method to detect a platform stationary status for a navigation system, comprising the following steps of:

  • measuring amplitudes of raw outputs of three-axis accelerometer mounted on a platform at a predetermined sample rate;

    computing latest mean value of outputs of the three-axis accelerometer for the latest samples within a predetermined time length;

    subtracting the latest mean value of the three-axis accelerometer outputs with a fixed time window from the raw three-axis accelerometer outputs; and

    determining a stationary state of the platform when a difference between the latest mean value and the raw outputs is less than a threshold value.

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