Occupant detection method and apparatus for air bag system

  • US 6,012,007 A
  • Filed: 06/03/1997
  • Issued: 01/04/2000
  • Est. Priority Date: 12/01/1995
  • Status: Expired due to Term
First Claim
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1. In a vehicle restraint system having a controller for deploying air bags and means for selectively allowing deployment according to the outputs of seat sensors responding to the weight of an occupant, a method of allowing deployment according to sensor response including the steps of:

  • determining measures represented by individual sensor outputs and calculating from the sensor outputs a relative weight parameter;

    establishing a first threshold of the relative weight parameter;

    allowing deployment when the relative weight parameter is above the first threshold;

    establishing a lock threshold above the first threshold;

    setting a lock flag when the relative weight parameter is above the lock threshold and deployment has been allowed for a given time;

    establishing an unlock threshold at a level indicative of an empty seat;

    clearing the flag when the relative weight parameter is below the unlock threshold for a time; and

    allowing deployment while the lock flag is set.

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