发明名称 |
Method and apparatus for determining road surface condition |
摘要 |
<p>A method, featuring robustness against changes in tire size, is provided for determining a road surface condition by dividing a time-series waveform of tire vibrations into windows without resorting to detection of the peak positions or measurement of the wheel speed. A time-series waveform of tire vibrations detected by a tire vibration detecting unit is windowed by a windowing unit. Time-series waveforms are extracted from the respective time windows, feature vectors X are calculated therefor, and then likelihoods Z for road-surface HMMs (hidden Markov models) are calculated. The likelihoods Z1 to Z5 calculated for the respective road-surface HMMs are compared with one another, and a road surface condition corresponding to the road-surface HMM showing the highest likelihood is determined to be the condition of the road surface on which the tire is running.</p> |
申请公布号 |
EP2537723(B1) |
申请公布日期 |
2014.06.25 |
申请号 |
EP20120173043 |
申请日期 |
2012.06.21 |
申请人 |
KABUSHIKI KAISHA BRIDGESTONE;INTER-UNIVERSITY RESEARCH INSTITUTE CORPORATION, RESEARCH ORGANIZATION OF INFORMATION AND SYSTEM |
发明人 |
HANATSUKA, YASUSHI;HIGUCHI, TOMOYUKI;MATSUI, TOMOKO |
分类号 |
B60T8/172 |
主分类号 |
B60T8/172 |
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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