| 摘要 |
PURPOSE:To improve the responsiveness in a safety device driving circuit by calculating a speed variable and an accelerating variation after obtaining information out of an accelerating sensor, calculating a specified impact judged value on the basis of this calculation, and if exceeding this value, emitting an impact judged signal. CONSTITUTION:An accelerating signal A of an accelerating sensor 3 is inputted into a speed change calculating means 201 and an acceleration variation calculating means 202 after a noise component is eliminated by an acceleration signal processing means 200. At the speed change calculating means 201, acceleration A is integrated from the impact starting estimation time of a vehicle, calculating a speed change value V, and at the acceleration variation calculating means 202, the acceleration A is differentiated, calculating an acceleration variation J. The speed change value V is multiplied to the acceleration variation J by an impact estimation integrating means 203, calculating an impact estimating product K, and this product K is integrated by an impact estimation integrated value calculating means 204, calculating an impact estimation integrated value I. If this impact integrated value I exceeds the specified impact judged value Incr, an impact judging means 205 generates an impact judging signal S, whereby a safety device driving means 206 drives a driving circuit 1. |
