Collision detector
AssigneeCalsonic Kansei Corporation
InventorTohru Oowada
Life of this patent
Estimating the term…
Abstract
A vehicle collision detector is configured to reliably activate an airbag system at a collision and prevent the airbag system from erroneously operating. The collision detector includes two acceleration sensors disposed at different positions in a vehicle to detect acceleration for collision determination, first and second collision routines in which a determination is made on whether or not a variation in the detected acceleration is caused by a collision, and a final collision routine in which an airbag module is activated when all of results of the first and second collision routines indicate a collision.
Claims4
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, wherein
- when 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).
Dependencies are inferred from the claim text.