Crash/non-crash discrimination using frequency components of acceleration uniquely generated upon crash impact

  • US 5,436,838 A
  • Filed: 09/21/1993
  • Issued: 07/25/1995
  • Est. Priority Date: 09/21/1992
  • Status: Expired due to Term
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First Claim
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1. A crash detection apparatus for operating an inflatable occupant restraint system, comprising:

  • an accelerometer for producing an accelerometer signal representative of acceleration/deceleration of the vehicle during a vehicle crash;

    Integrator means for integrating said accelerometer signal at intervals and producing a velocity signal;

    bandpass filter means for detecting frequency components of said accelerometer signal which appear uniquely during said vehicle crash;

    squaring means for squaring the amplitude of the bandpass filtered accelerometer signal and producing an impact energy signal; and

    decision means for producing a deployment signal in accordance with said velocity signal and said impact energy signal and applying said deployment signal to said occupant restraint system,

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