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Trigger device for vehicle safety apparatus

  • US 5,490,067 A
  • Filed: 06/04/1992
  • Issued: 02/06/1996
  • Est. Priority Date: 06/04/1991
  • Status: Expired due to Fees
First Claim
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1. A trigger device for a vehicle safety apparatus, comprising:

  • an acceleration sensor for detecting an acceleration of a vehicle and generating an electric acceleration signal representative thereof;

    integration means for integrating the acceleration signal during each given integration period and generating an integration value representative of a result of the integrating;

    determination means for determining whether or not a collision of the vehicle is present on a basis of the integration value generated by the integration means; and

    trigger means for triggering the vehicle safety apparatus when the determination means determines a collision of the vehicle to be present;

    the determination means comprising;

    means for dividing the integration period into divided portion;

    differentiation means for detecting a respective differential value of the acceleration signal for each of the divided portions of the integration period,addition means for adding the respective differential values detected by the differentiation means and the integration value generated by the integration means, and for generating an addition value representative of a result of the adding, andsub-determination means for determining whether or not a collision of the vehicle is present on a basis of the addition value generated by the addition means.

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