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METHOD AND APPARATUS FOR FALL DETECTION

  • US 20110231145A1
  • Filed: 11/19/2009
  • Published: 09/22/2011
  • Est. Priority Date: 11/28/2008
  • Status: Active Grant
First Claim
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1. A method for detecting the fall of an object, said method comprising the steps of:

  • acquiring (501) a plurality of time-varying accelerations associated with a movement of said object;

    computing (502) a plurality of respective velocities and displacements in the direction of gravity, based on the plurality of time-varying accelerations;

    determining (503) lead time and return time of the movement, based on the plurality of accelerations, velocities and displacements, wherein the lead time equals a time interval from an original point (P1) of the movement to an extreme point (E) of the movement, and the return time equals a time interval from the extreme point (E) of the movement to a final point (R) of the movement; and

    determining (504) whether the fall of said object occurs, based on whether a peak value of the velocities is larger than a predefined threshold value and whether the lead time is longer than the return time.

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