发明名称 |
Unterscheidung eines Unfalls von einem Nicht-Unfall durch Analyse der beim Aufprall erzeugten Frequenzkomponenten der Beschleunigungmesswerte |
摘要 |
In a crash detection apparatus, the output signal of an accelerometer is integrated at intervals and a velocity signal is produced. Those frequency components of the accelerometer output which appear uniquely during a vehicle crash are extracted and their amplitude is squared to produce an impact energy signal. An airbag is operated when the velocity signal exceeds a first threshold, or when a sum of the velocity and impact energy signals exceeds a second threshold, or operated when the impact energy signal exceeds a third threshold. In a modified embodiment, the accelerometer output is integrated both at longer and shorter intervals to produce a long-term and a short-term velocity signal. The airbag is operated when the long-term velocity signal exceeds a first threshold, or when the short-term velocity signal and the impact energy signal simultaneously exceed a second and a third threshold, respectively. <IMAGE> |
申请公布号 |
DE69315653(T2) |
申请公布日期 |
1998.04.02 |
申请号 |
DE1993615653T |
申请日期 |
1993.09.21 |
申请人 |
NEC CORP., TOKIO/TOKYO, JP |
发明人 |
MIYAMORI, MASAHIRO, C/O NEC HOME ELECTRONICS LTD., OSAKA-SHI, OSAKA, JP |
分类号 |
B60R21/01 |
主分类号 |
B60R21/01 |
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