• US 20090312973A1
  • Filed: 04/16/2009
  • Published: 12/17/2009
  • Est. Priority Date: 06/12/2008
  • Status: Active Grant
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First Claim
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1. A method comprising:

  • sensing an acceleration signal from a patient using an accelerometer;

    detecting a walking state using the acceleration signal, the detecting the walking state including;

    extracting a characteristic of an AC component of the acceleration signal;

    performing a comparison between the characteristic and a template; and

    using the comparison to distinguish the walking state from a non-walking activity state; and

    using an orientation of the accelerometer in the walking state to perform a posture calibration of the acceleration signal of the accelerometer.

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