Steuerungssystem für eine Fahrzeugsicherheitsvorrichtung.

摘要

A control system for a vehicle safety device includes a pair of acceleration sensing circuits (10a, 10b). The outputs of the acceleration sensing circuits correspond to a deceleration of the vehicle in a direction of running of the vehicle, and are in opposite phase with each other. A differential calculation device (20a, 20b, 130a, 130b) effects calculation in accordance with the difference between the outputs of the acceleration sensing circuits, so as to cause noises, applied to the acceleration sensing circuits, to cancel each other, thereby preventing an inadvertent activation of the vehicle safety device due to such noises. According to another alternative construction, in order to prevent the inadvertent activation of the vehicle safety device due to the noises, the opposite-phase outputs of the pair of acceleration sensing circuits (10a, 10b) are integrated by a pair of integrating circuits (30a, 30b), and a pair of collision judgment circuits (40a, 40b) compare the outputs of the integrating circuits with respective threshold levels so as to judge whether a collision has occurred. A drive circuit (70) activates the vehicle safety device when the pair of collision judgment circuits both judge that the collision has occurred.