Title:
ROAD SURFACE CONDITION ESTIMATION METHOD AND ROAD SURFACE CONDITION ESTIMATION DEVICE
Document Type and Number:
WIPO Patent Application WO/2019/017436
Kind Code:
A1
Abstract:
This road surface condition estimation device is provided with: an acceleration sensor 11 which detects an acceleration in a tire diameter direction; an acceleration waveform extraction means 12 which extracts an acceleration waveform from the acceleration; a differential waveform calculation means 13 which calculates a differential waveform of the acceleration waveform; a rotation time calculation means 14 which calculates a rotation time of a tire from the differential waveform; a standardized acceleration waveform creation means 15 which creates a standardized acceleration waveform by using the rotation time of the tire; and a road surface condition estimation means 16 which determines whether a water infiltration state between the tire and the road surface is shifted to a hydroplaning state.
Inventors:
MASAGO TAKESHI (JP)
Application Number:
PCT/JP2018/027116
Publication Date:
January 24, 2019
Filing Date:
July 19, 2018
Export Citation:
Assignee:
BRIDGESTONE CORP (JP)
International Classes:
G01M17/02; B60C19/00; B60W40/068
Foreign References:
| JP2010032355A | 2010-02-12 | |||
| US20110199201A1 | 2011-08-18 | |||
| JP2010159031A | 2010-07-22 | |||
| JP5259245B2 | 2013-08-07 |
Other References:
See also references of EP 3657151A4
Attorney, Agent or Firm:
MIYAZONO Yasuo (JP)
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