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71. 发明授权

US07240540B2 Rough road detection system 有权
标题翻译：粗路检测系统
公开(公告)号：US07240540B2
公开(公告)日：2007-07-10
申请号：US11263174
申请日：2005-10-31
申请人： Tameem K. Assaf , David S. Mathews , Sanjeev M. Naik
发明人： Tameem K. Assaf , David S. Mathews , Sanjeev M. Naik
IPC分类号： G01B5/28
CPC分类号： G01M15/11 , B60T2210/14
摘要： A rough road detection system includes a collection module, a statistical module, and a comparison module. The collection module collects samples from a vibration sensitive signal. The statistical module removes a periodic anomaly from the samples and removes a random anomaly from the samples with a filter having a filter coefficient based on an engine speed signal. In addition, the statistical module calculates a statistical signal based on the samples. The rough road detection system also includes a derivative module that calculates a first and second derivative based on a rate or time. The derivative module removes negative derivatives when the derivatives are calculated with respect to the rate and positive derivatives when the derivatives are calculated with respect to time. The comparison module determines whether a rough road condition exists based on the statistical signal or the first and second derivatives.
摘要翻译：粗糙的道路检测系统包括收集模块，统计模块和比较模块。收集模块从振动敏感信号收集样品。统计模块从样本中去除周期异常，并从具有基于发动机转速信号的滤波器系数的滤波器的样本中去除随机异常。此外，统计模块基于样本计算统计信号。粗糙道路检测系统还包括基于速率或时间来计算第一和第二导数的导数模块。当衍生物相对于时间计算时，当相对于速率和正衍生物计算衍生物时，衍生模块去除负衍生物。比较模块基于统计信号或第一和第二导数来确定是否存在粗暴的道路状况。

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