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Passive restraint control system for vehicles

  • US 6,272,412 B1
  • Filed: 11/09/1998
  • Issued: 08/07/2001
  • Est. Priority Date: 11/09/1998
  • Status: Expired due to Term
First Claim
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1. A method of determining passive restraint deployment for a vehicle having an accelerometer mounted therein comprising the steps of:

  • generating an acceleration signal from the accelerometer;

    feeding the acceleration signal through a high pass filter to create an impact mode signal in a high frequency range;

    feeding the acceleration signal through a low pass filter in parallel with the high pass filter to create an impact severity signal in a low frequency range;

    comparing the impact mode signal to a predetermined impact mode threshold;

    comparing the impact severity signal to a predetermined impact severity threshold; and

    sending a deployment signal only if both the impact mode threshold and the impact severity threshold are exceeded.

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