Abstract: A steering wheel angle detection system based on multiple-axis inertial sensor was proposed to realize wireless external and full range angle real-time detection. Based on the attitude analysis of three-axis acceleration component in Roll-Pitch model, the complementary filtering for analytic angle was carried out by using three-axis angular velocity data, in order to improve the high frequency characteristics. The reset compensation and the full angle compensation algorithm were designed, and the system could obtain the steering wheel full angle data with an initial angle of 0° and an absolute position of ±720°. The detection results of steering wheel angle were wirelessly transmitted to PC or other intelligent terminals through Bluetooth module. The results of comparative experiments show that the steering wheel angle detected by the proposed system has a good linear correlation with the true value. The field test results show that the proposed system can realize real-vehicle, real-time and auxiliary discrimination of common driving behaviors.

Key words: vehicle engineering, steering wheel angle sensor, multiple-axis inertial sensor, attitude detection, driving behaviour, wireless transmission

摘要： 提出一种基于多轴惯性传感器的方向盘转角检测系统，实现无线外置式、全范围转角实时检测。通过将三轴加速度分量在Roll-Pitch模型中进行姿态解析，并利用三轴角速度数据对解析角度进行互补滤波以改善高频特性，设计归零补偿和全角补偿算法，系统能够获取以0°为初始角度，±720°绝对位置的方向盘全角数据。方向转角检测结果通过蓝牙模块无线传输至PC或智能终端。对比实验结果表明：该系统检测的方向盘转角与真值呈现良好的线性相关。实车测试结果表明：本系统可实现对常见的驾驶行为的实车、实时辅助判别。

关键词: 车辆工程 , 方向盘转角传感器, 多轴惯性传感器, 姿态检测, 驾驶行为, 无线传输