| 摘要 |
A collision detecting method for detecting a collision of a vehicle on the basis of an acceleration signal produced by an acceleration sensor. A reduction in the amount of speed of the vehicle due to the collision from an acceleration signal is estimated by an acceleration signal from the acceleration sensor and by a rate of time variation in the acceleration signal, and the collision of the vehicle is detected when the amount of deceleration exceeds a predetermined value. In addition, the collision of the vehicle is detected, when an integration value resulting from an integration of the acceleration signal over a first period of time exceeds a predetermined value, and when a differentiation value of the acceleration signal exceeds a predetermined value. The collision detecting method can be used to operate a collision safety device (such as, an air bag system and a belt retracting system) within an extremely short time after occurrence of the collision.
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