发明名称 |
Device for measuring longitudinal acceleration of vehicle immune to static and dynamic errors |
摘要 |
A first signal is obtained by detecting speed of wheels of a vehicle to indicate the wheel speed. On the other hand, a second signal is obtained by detecting longitudinal acceleration to directly indicate longitudinal acceleration of the vehicle. A third signal indicating the change rate of the wheel speed is obtained by differentiating the first signal by time. The third signal is sensitive to a small convex or concave of the road surface but not sensitive to a longitudinal inclination of the road surface. The second signal is not sensitive to a small convex or concave of the road surface but is sensitive to a longitudinal inclination of the road surface. Then, a fourth signal is obtained from the second signal by filtering low frequency components off therefrom, while a fifth signal is obtained from the third signal by filtering high frequency components off therefrom. Then, a final longitudinal acceleration signal is obtained by composing the fourth and fifth signals together. It will be desirable that a cutoff frequency of the low pass filtering is lowered when a brake locking has occurred.
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申请公布号 |
US6254204(B1) |
申请公布日期 |
2001.07.03 |
申请号 |
US19990353763 |
申请日期 |
1999.07.15 |
申请人 |
TOYOTA JIDOSHA KABUSHIKI KAISHA;AISIN SEIKI KABUSHIKI KAISHA |
发明人 |
HARA KOUICHI;KAGAWA KAZUNORI;KANAGAWA AKIHARU |
分类号 |
B60T8/28;B60T8/171;B60T8/172;B60T8/173;B60T8/1761;B60T8/58;B60T8/66;G01P15/00;G01P15/08;G01P15/16;(IPC1-7):B60T8/38 |
主分类号 |
B60T8/28 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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