| 摘要 |
PURPOSE:To provide a crash judging device in which a number of acceleration sensors are not used, or the freedom of arranging acceleration sensors is enhanced. CONSTITUTION:A g-signal is shaped by a waveform shaping part 11 and inputted to a differential part 12. The differential part 12 differentiates the g-signal every determined time. In a correlative value arithmetic part 13, correlation functions of gradient are preliminarily stored, and the differential value of the inputted g-signal is converted into a correlative value. The correlative value of the g-signal is inputted to a correlative value integrating part 14, in which the correlative value is integrated. A comparator 15 monitors whether the integrated value exceeds a correlative value judging level 16 (=alpha) or not, and when it is judged that the integrated value exceeds the level, a signal of H-level, for example, is outputted. According to this judgment, the crash is confirmed as a crash to protect occupants. On the other hand, an integrating part 17 integrates the g-signal, and when the integrated value exceeds an integrated value judging level 19 (=beta), the collision is judged. A squib start signal is outputted from a theoretical arithmetic part 20. |
