Title:
METHOD FOR ESTIMATING CONDITION OF ROAD SURFACE
Document Type and Number:
WIPO Patent Application WO/2011/145356
Kind Code:
A1
Abstract:
Disclosed is a method which is for estimating the condition of a road surface and which can estimate by further subdividing a snow covered road during travel. In the disclosed method, tyre vibration in the circumferential-direction of a tyre, road surface temperature (T) and tyre-generated noise are each detected by an acceleration sensor, a road surface thermometer, and a microphone, and then band values P11, P12 and P13 for a pre-tread region (R1), band values P21, P22 and P23 for a tread region (R2), band values P31, P32 and P33 for a pre-kick-out region (R3), band values P41 and P42 for a kick-out region (R4), and band values P51, P52 and P53 for a post kick-out region (R5) are calculated from the tyre vibration data. A sound pressure level comparison (Q)=(PA/PB), which is the comparison of a band power value (PB) of a high frequency band and a band power value (PA) of a low frequency band, is calculated from data on the tyre-generated noise; and band value (Pij), data on the road surface temperature (T), and the sound pressure level comparison (Q) are used to estimate the condition of the road surface.
Inventors:
HANATSUKA Yasushi (1-1 Ogawahigashi-cho 3-chom, Kodaira-shi Tokyo 31, 〒1878531, JP)
花塚 泰史 (〒31 東京都小平市小川東町３－１－１ 株式会社ブリヂストン 技術センター内 Tokyo, 〒1878531, JP)
WAKAO Yasumichi (1-1 Ogawahigashi-cho 3-chom, Kodaira-shi Tokyo 31, 〒1878531, JP)
花塚 泰史 (〒31 東京都小平市小川東町３－１－１ 株式会社ブリヂストン 技術センター内 Tokyo, 〒1878531, JP)
WAKAO Yasumichi (1-1 Ogawahigashi-cho 3-chom, Kodaira-shi Tokyo 31, 〒1878531, JP)
Application Number:
JP2011/050417
Publication Date:
November 24, 2011
Filing Date:
January 13, 2011
Export Citation:
Assignee:
KABUSHIKI KAISHA BRIDGESTONE (10-1, Kyobashi 1-chome Chuo-k, Tokyo 40, 〒1048340, JP)
株式会社ブリヂストン (〒40 東京都中央区京橋１－１０－１ Tokyo, 〒1048340, JP)
HANATSUKA Yasushi (1-1 Ogawahigashi-cho 3-chom, Kodaira-shi Tokyo 31, 〒1878531, JP)
花塚 泰史 (〒31 東京都小平市小川東町３－１－１ 株式会社ブリヂストン 技術センター内 Tokyo, 〒1878531, JP)
株式会社ブリヂストン (〒40 東京都中央区京橋１－１０－１ Tokyo, 〒1048340, JP)
HANATSUKA Yasushi (1-1 Ogawahigashi-cho 3-chom, Kodaira-shi Tokyo 31, 〒1878531, JP)
花塚 泰史 (〒31 東京都小平市小川東町３－１－１ 株式会社ブリヂストン 技術センター内 Tokyo, 〒1878531, JP)
International Classes:
G01W1/00; B60T8/172; B60W40/06; G01H17/00
Attorney, Agent or Firm:
MIYAZONO Junichi et al. (6th Fl, Fifth Tanaka Bldg. 4-4, Iidabashi 3-chom, Chiyoda-ku Tokyo 72, 〒1020072, JP)
Download PDF:
Claims:
Previous Patent: ILLUMINATING DEVICE AND DISPLAY DEVICE PROVIDED WITH SAME
Next Patent: DAMPER, WASHING MACHINE, AND WASHING/DRYING MACHINE
Next Patent: DAMPER, WASHING MACHINE, AND WASHING/DRYING MACHINE