×

Collision detector

  • US 20090210117A1
  • Filed: 02/18/2009
  • Published: 08/20/2009
  • Est. Priority Date: 02/20/2008
  • Status: Active Grant
First Claim
Patent Images

1. A collision detector which detects a collision of a vehicle to activate an occupant protector unit, comprising:

  • a plurality of acceleration sensors provided at different positions in the vehicle to detect acceleration of the vehicle;

    a collision determiner unit which determines whether or not a variation in the acceleration detected by each of the acceleration sensors is caused by a collision of the vehicle;

    a final determiner unit which activates the occupant protector unit when the collision determiner unit determines that all of variations in the acceleration detected by each acceleration sensor are caused by a collision of the vehicle;

    an acceleration determiner unit which determines whether or not the acceleration detected by each acceleration sensor is equal to or over a predetermined threshold; and

    a speed variation determiner unit which determines whether or not a speed variation of the vehicle coincides with a pre-stored speed variation which occurs at a collision, when the acceleration determiner unit determines that the acceleration is equal to or over the predetermined threshold, whereinwhen receiving a same acceleration, at least one of the acceleration sensors is set to be higher in output level than the other acceleration sensor(s).

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×