The invention relates to a steering wheel off-hand detection method which is characterized by comprising the following steps: acquiring a hand torque signal; performing windowing processing on the hand torque signal to obtain a group of window data; performing frequency domain analysis on the window data and calculating a low-frequency signal energy sum value; carrying out time domain analysis onthe window data and calculating a signal mean square error and a signal extreme value difference; and judging whether the driver leaves the hand from the steering wheel or not according to the low-frequency signal energy sum value, the signal mean square error and the signal extreme value difference, and if so, inhibiting the lane keeping auxiliary driving function. According to the method, through the mode of combining time domain analysis and frequency domain analysis, analysis can be directly conducted according to the hand torque signals provided by an electro-hydraulic steering engine, the cost is saved, and meanwhile the accuracy of judgment results of the hand leaving state and the hand in-hand state of the steering wheel is improved.
本发明涉及一种方向盘离手检测方法,其特征在于,其包括:获取手力矩信号;对所述手力矩信号进行加窗处理后得到一组窗口数据;对所述窗口数据进行频域分析并计算低频信号能量和值;对所述窗口数据进行时域分析并计算信号均方差和信号极值差;根据所述低频信号能量和值、信号均方差以及信号极值差判断驾驶员对方向盘是否处于离手状态,若是则抑制车道保持辅助驾驶功能。该方法通过时域分析和频域分析相结合的方式,可直接根据电液转向机提供的手力矩信号进行分析,节省了成本的同时还提高了对方向盘离手和在手状态判断结果的精度。
Steering wheel off-hand detection method and lane keeping auxiliary driving system
一种方向盘离手检测方法及车道保持辅助驾驶系统
2021-03-12
Patent
Electronic Resource
Chinese
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