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Method and device for recognizing a collision

  • US 7,327,236 B2
  • Filed: 02/17/2004
  • Issued: 02/05/2008
  • Est. Priority Date: 03/03/2003
  • Status: Expired due to Fees
First Claim
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1. A method for recognizing a collision for a passenger protection system in a motor vehicle, the method which comprises:

  • continuously analyzing a signal interval of an output signal of an acceleration or pressure sensor is with regard to frequencies contained therein;

    first, dividing a frequency spectrum contained in the signal interval into a suitable number of frequency bands;

    determining a partial signal energy present for each frequency band;

    finding a relationship between the partial signal energy and a total energy of the signal interval being analyzed;

    comparing relative activations of the various frequency bands thus obtained with predetermined threshold values (SW); and

    determining whether or not a collision has occurred based on the comparison.

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