Calibration techniques for activity sensing devices

  • US 9,137,309 B2
  • Filed: 10/23/2006
  • Issued: 09/15/2015
  • Est. Priority Date: 05/22/2006
  • Status: Active Grant
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First Claim
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1. A method of automatically updating a user'"'"'s calibration model, the calibration model being used by a user activity monitoring system, the method comprising:

  • receiving from the user a selected activity type to be performed by the user for updating the user'"'"'s calibration model;

    receiving an indication of a calibration distance;

    in response to receiving a calibration start indication;

    receiving current user activity data corresponding to a user'"'"'s current activity type;

    determining if the user'"'"'s current activity type is consistent with the selected activity type based upon the user activity data;

    notifying the user to change the user'"'"'s current activity type to the selected activity type when the user'"'"'s current activity data indicates that the current activity type is not consistent with the selected activity type;

    in response to a calibration stop indication;

    estimating at teat a distance based on the received user activity data and an existing user calibration model;

    determining an accuracy ratio based on the calibration distance and the estimated distance;

    modifying the user'"'"'s existing calibration model only if the accuracy ratio is within a range of acceptable accuracy ratios and the activity data is consistent; and

    using the user'"'"'s modified calibration model to provide activity output data in accordance with the acceptable accuracy ratio.

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