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FALL DETECTION DEVICE, MAGNETIC DISK DEVICE, AND PORTABLE ELECTRONIC APPARATUS

  • US 20100073812A1
  • Filed: 11/30/2009
  • Published: 03/25/2010
  • Est. Priority Date: 06/05/2007
  • Status: Active Grant
First Claim
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1. A fall detection device for detecting a fall on the basis of an output signal of an acceleration sensor, the fall detection device, comprising:

  • a fall start monitoring unit to monitor and determine whether or not the fall detection device is in a fall start state in which a signal indicating a differentiation value of the absolute value of acceleration is lower than a given negative threshold value in a negative direction or is within a given negative range;

    a low-gravity transition detection unit to detect whether or not the fall detection device is in a period of transition from the fall start state to a low gravity state in which the signal indicating the absolute value of acceleration is lower than a given threshold value or falls within a given range lower than a value of the stationary state within a given period of time; and

    a falling state detection unit to detect a falling state in which the low gravity state continues for a given period of time or longer.

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