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Motion Detection Apparatus and Motion Detecting Method

  • US 20090006028A1
  • Filed: 11/01/2005
  • Published: 01/01/2009
  • Est. Priority Date: 11/05/2004
  • Status: Active Grant
First Claim
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1. A motion detection apparatus for detecting motion of an electronic device, comprising:

  • an acceleration sensor which detects acceleration generated by motion of the electronic device;

    a motion detecting section including a statistical processing section which calculates the average value of data provided from the acceleration sensor, calculates the difference between the average value and the last value of the data obtained, and calculates from the difference a pseudo-variance value of the data;

    a comparing section which compares the pseudo-variance value calculated by the motion detecting section with a motion threshold and generates a signal value in response to determination that the pseudo-variance value exceeds the motion threshold; and

    a signal generating section including means for sequentially adding up the signal values generated by the comparing section at predetermined time intervals.

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