The invention discloses a steering wheel angle calibration device and method, and the device comprises a camera, an EPS controller, a steering wheel angle sensor, and a steering motor. The camera is used for detecting the bending condition of a lane line in front of a vehicle and vehicle driving conditions. The EPS controller is used for calculating the curvature of a lane line, enabling the vehicle to be located in the middle of the lane to run if the curvature is smaller than a curvature threshold value and the vehicle is about to deviate from the lane, and is further used for obtaining a transverse deviation change rate, and obtaining a transverse deviation change rate if the transverse deviation change rate is smaller than a change rate threshold value and the duration time is larger than a time threshold value, the steering wheel angle sensor detects a steering wheel angle real-time value, the EPS controller is further used for judging whether the steering wheel angle real-time value is larger than an angle threshold value, and if yes, the steering wheel angle zero position is calibrated again. Whether the absolute angle of the steering wheel deviates can be automatically recognized, the zero position of the steering wheel angle is calibrated again during deviation calibration, and driving safety is improved.
本申请公开了一种方向盘角度标定装置以及方法,其中,方向盘角度标定装置包括:摄像头、EPS控制器、方向盘角度传感器以及转向电机;摄像头用于检测车辆前方车道线弯曲情况和车辆行驶情况;EPS控制器用于计算出车道线的曲率,若曲率小于曲率阈值,则车辆欲偏离车道时,使车辆居于车道中间行驶,EPS控制器还用于得到横向偏移变化率,若横向偏移变化率小于变化率阈值,若持续时间大于时间阈值,方向盘角度传感器检测方向盘角度实时值,EPS控制器还用于判断方向盘角度实时值是否大于角度阈值,若大于角度阈值,则重新标定方向盘角度零位。本申请能够自动识别方向盘绝对角度是否标偏,并在标偏时重新标定方向盘角度零位,提升行车安全性。
Steering wheel angle calibration device and method
方向盘角度标定装置及方法
2021-01-29
Patent
Electronic Resource
Chinese
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