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Programmable automotive computer method and apparatus with accelerometer input

  • US 7,643,912 B2
  • Filed: 11/01/2006
  • Issued: 01/05/2010
  • Est. Priority Date: 11/01/2004
  • Status: Active Grant
First Claim
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1. A method for calculating a point at which a vehicle has traveled a selected distance from a standing start point, wherein the distance calculation corrects for errors in velocity data available from a vehicle'"'"'s onboard diagnostics system, comprising:

  • accessing the onboard diagnostic system to obtain said vehicle velocity data;

    detecting the start time of said vehicle travel, wherein said detector is independent of said onboard diagnostic system;

    detecting vehicle acceleration;

    generating a first set of velocity values based on said detected vehicle start time and said detected vehicle acceleration;

    storing said first set of velocity values;

    storing a second set of velocity values based on the vehicle velocity data received from said onboard diagnostic system;

    generating a time stamp for each of said velocity values of said first set and said second set;

    generating corrected velocity values as a function of said first set and said second set of velocity values, said time stamps, and said detected start time; and

    integrating said corrected velocity values to calculate the point at which the vehicle has traveled the selected distance from said standing start point.

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