发明授权
- 专利标题： Road surface state estimating apparatus, road surface friction state estimating apparatus, road surface state physical quantity calculating apparatus, and road surface state announcing apparatus
- 专利标题（中）： 路面状态估计装置，路面摩擦状态估计装置，路面状态物理量计算装置以及路面状态通知装置
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申请号： US10702492申请日： 2003-11-07
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公开(公告)号： US07248958B2公开(公告)日： 2007-07-24
- 发明人: Yoshitoshi Watanabe , Katsuhiro Asano , Takaji Umeno , Shu Asami , Masaru Sugai
- 申请人： Yoshitoshi Watanabe , Katsuhiro Asano , Takaji Umeno , Shu Asami , Masaru Sugai
- 申请人地址： JP Aichi-gun
- 专利权人： Kabushiki Kaisha Toyota Chuo Kenkyusho
- 当前专利权人： Kabushiki Kaisha Toyota Chuo Kenkyusho
- 当前专利权人地址： JP Aichi-gun
- 代理机构： Oblon, Spivak, McClelland, Maier & Neustadt, P.C.
- 优先权： JP2002-325397 20021108; JP2003-353579 20031014
- 主分类号： G06F19/00
- IPC分类号： G06F19/00
摘要：
A tire-generated sound detection sensor detects a tire-generated sound that is generated from a tire while the vehicle is running. A wheel rotation sensor detects a wheel rotation speed. A preprocessor calculates feature quantities corresponding to a road surface state and tire-generated sound sources. A feature vector generator generates a feature vector having, as components, the feature quantities calculated by the preprocessor and the detected wheel rotation speed. A judgment processor estimates a state of a road surface on which the vehicle is running on the basis of the feature vector generated by the feature vector generator and feature vectors that are stored in a judgment map memory so as to be correlated with a plurality of road surface states, respectively, and each of which corresponds to a road surface state and tire-generated sound sources.
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