公开(公告)号：EP2343522A1

公开(公告)日：2011-07-13

申请号：EP09823413.1

申请日：2009-09-07

申请人： Bridgestone Corporation

发明人： WAKAO, Yasumichi

IPC分类号： G01H17/00 ,  B60T8/00 ,  G01H3/00 ,  G01W1/00

CPC分类号： B60T8/172 ,  B60T2210/12 ,  B60W40/06 ,  B60W40/068 ,  B60W2420/54 ,  G01H17/00

摘要： There is provided a method for determining a road surface state which can accurately estimate the road surface state on which a vehicle is running at one of finely classified road surface states based on a sound detection signal from a ground contact surface sound detection unit for detecting a sound in the vicinity of the ground contact surface of the tire of the running vehicle.
The method calculates a wave profile of frequency dispersion by executing a 1/N octave analysis of a detected sound signal from a sound detection unit 20 for estimating a road surface state. The state of the road surface on which the vehicle is running is determined whether the calculated wave profile of frequency dispersion satisfies predetermined determination conditions of the respective road surface states. A microphone housed in a container is used to detect said sound, and the determining step is adapted to apply the determination conditions to the measured wave profile including a resonance caused by the container.

摘要翻译： 提供了一种用于确定路面状态的方法，该路面状态可以基于来自用于检测车辆的地面接触表面声音检测单元的声音检测信号，精确地估计车辆在细分路面状态之一上行驶的路面状态 在行驶车辆的轮胎的接地面附近发出声音。 该方法通过对来自用于估计路面状态的声音检测单元20的检测声音信号执行1 / N倍频程分析来计算频率色散的波形。 确定车辆运行的路面的状态是否所计算的频率分布的波形曲线满足各路面状态的预定的确定条件。 容纳在容器中的麦克风用于检测所述声音，并且所述确定步骤适于将所述确定条件应用于包括由所述容器引起的共振的测量波形。