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Fall detectors and a method of detecting falls

  • US 9,974,908 B2
  • Filed: 12/17/2009
  • Issued: 05/22/2018
  • Est. Priority Date: 07/22/2009
  • Status: Active Grant
First Claim
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1. A fall detector for detecting falls of a user or an object to which the fall detector is attached, the fall detector comprising:

  • an air flow channel;

    an air flow sensor disposed adjacent the air flow channel and configured to measure air flow along the air flow channel;

    an accelerometer configured to measure accelerations of the fall detector;

    a processor configured to;

    estimate an orientation of the fall detector from the measurements from the accelerometer,estimate a vertical velocity from the measurements from the air flow sensor and the estimated orientation,estimate a change in altitude from the estimated vertical velocity,determine whether a fall has occurred based on the estimated change in altitude.

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