Title:
ROAD SURFACE STATE DETECTING DEVICE
Document Type and Number:
Japanese Patent JP3393500
Kind Code:
B2
Abstract:
PURPOSE: To provide a road surface state detecting device capable of improving the judgement precision of a road surface state by setting the upper and the lower limit values of the input range of the sound pressure value of a road noise in accordance with frequency or car speed.
CONSTITUTION: The road noise is detected by a road noise detecting means 1 such as a microphone, etc., and the detected road noise is frequency-analyzed by a filter 3, and the road noise of the specified frequency is inputted to a neural network. At that time, if the specified frequency is of a 63Hz band, for instance, since the sound pressure value of it belongs to the range of 7 dB to 100dB (range of area (r) added with some allowance) irrespective of the road surface state, the road noise detected actually is inputted to the neural network after being normalized according to this range (converted into real number value of range of 0 to 1).
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Inventors:
Yorihisa Yamamoto
Makoto Kotabe
Ichiro Harada
Itagaki On
Hideki Kubotani
Makoto Kotabe
Ichiro Harada
Itagaki On
Hideki Kubotani
Application Number:
JP29899194A
Publication Date:
April 07, 2003
Filing Date:
November 08, 1994
Export Citation:
Assignee:
Honda motor industry stock company
International Classes:
B60R16/02; B60Q11/00; G06F15/18; G06G7/60; G06N3/00; G08G1/00; (IPC1-7): G08G1/00; B60R16/02; G06F15/18
Domestic Patent References:
| JP6138018A | ||||
| JP650878A | ||||
| JP275562U |
Other References:
吉田和夫（外３名），カルマンフィルタによる路面と車両の状態推定，日本機械学会論文集Ｃ編，日本，社団法人 日本機械学会，１９８９年７月２５日，第５５巻 第５１５号，１６７２−１６７９
塩塚稔也（外４名），路面の分類と車両の適応振動制御へのニューラルネットワークの応用，「運動と振動の制御」シンポジウム講演論文集，日本，社団法人 日本機械学会，１９９１年９月２日，Ｎｏ．９１０−５２，７３−７８
大羽勝弘（外３名），Ｆｕｚｚｙ Ｌｏｇｉｃを用いた路面推定，自動車技術会学術講演会前刷集，日本，社団法人 自動車技術会，１９８８年５月２４日，Ｎｏ．８８１，１０９−１１２
塩塚稔也（外４名），路面の分類と車両の適応振動制御へのニューラルネットワークの応用，「運動と振動の制御」シンポジウム講演論文集，日本，社団法人 日本機械学会，１９９１年９月２日，Ｎｏ．９１０−５２，７３−７８
大羽勝弘（外３名），Ｆｕｚｚｙ Ｌｏｇｉｃを用いた路面推定，自動車技術会学術講演会前刷集，日本，社団法人 自動車技術会，１９８８年５月２４日，Ｎｏ．８８１，１０９−１１２
Attorney, Agent or Firm:
Toshihiko Watanabe
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