Method and system for detecting vehicle roll-over

  • US 5,610,575 A
  • Filed: 08/25/1994
  • Issued: 03/11/1997
  • Est. Priority Date: 08/25/1994
  • Status: Expired due to Fees
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First Claim
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1. A method for detecting roll-over of a vehicle comprising the steps of:

  • receiving vehicle data from a signal output by an accelerometer, said accelerometer having a sensing axis oriented substantially parallel to a gravitational force;

    averaging said vehicle data to filter out noise;

    determining whether the averaged vehicle data exceeds a first predetermined threshold value, said first threshold value being representative of a g-force indicative of the vehicle beginning to roll-over;

    estimating a slope value representative of a change over time in the averaged data;

    determining whether the slope value exceeds a second predetermined threshold value; and

    actuating at least one safety device if both said first and second threshold values are exceeded.

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