专利名称：Crash/non-crash discrimination using
frequency components of accelerationuniquely generated upon crash impact
发明人：Miyamori, Masahiro, c/o NEC Home
Electronics Ltd.
申请号：EP93115182.3申请日：19930921公开号：EP0590476A3公开日：19940907
专利附图：
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 ofthe accelerometer output which appear uniquely during a vehicle crash are extracted andtheir amplitude is squared to produce an impact energy signal. An airbag is operatedwhen the velocity signal exceeds a first threshold, or when a sum of the velocity andimpact energy signals exceeds a second threshold, or operated when the impact energysignal exceeds a third threshold. In a modified embodiment, the accelerometer output isintegrated both at longer and shorter intervals to produce a long-term and a short-termvelocity signal. The airbag is operated when the long-term velocity signal exceeds a firstthreshold, or when the short-term velocity signal and the impact energy signalsimultaneously exceed a second and a third threshold, respectively.
申请人：NEC CORPORATION
地址：7-1, Shiba 5-chome Minato-ku Tokyo JP
国籍：JP
代理机构：VOSSIUS & PARTNER
更多信息请下载全文后查看
因篇幅问题不能全部显示，请点此查看更多更全内容