Activating device for occupant protection device and controlling method therefor

摘要

The activating device ( 20 ) for an occupant protection device includes a first deceleration detecting means ( 22 ) for detecting a first deceleration G in vehicle front/rear direction and an activation judging means ( 37 ) for judging whether the activation of the occupant protection device is necessary or not by comparing the first deceleration G detected by the first deceleration detecting means ( 22 ) with a first threshold value. The device further includes a second deceleration detecting means ( 24, 26 ) for detecting a deceleration LG, RG at a position further front side of the vehicle than the position detecting the first deceleration, a collision condition detecting means ( 35 ) for detecting a vehicle collision condition based on a second threshold value by the deceleration LG and RG and a first threshold changing means ( 36 ) for changing the first threshold value of an activation judging means ( 37 ) based on the detected result of the collision condition detecting means ( 35 ).