长距超声波雷达在汽车智能泊车系统中的测距研究

Study on Distance Measurement of Long-distance Ultrasonic Radar in Intelligent Parking System

将长距超声波雷达搭载在实际车体上,选用前2后4配置方案,当汽车经过一个空车位时,长距超声波雷达发射电磁波形感知周围障碍物,识别车位。研究结果表明,通过LIN总线串行通讯网络传输,用数字信号量替换模拟信号量,对超声波雷达进行控制,最后用拟合曲线分析出的横向车位和纵向车位精确度高,简单实用,效果好成本低。从而为智能泊车技术在中低端车上的应用创造条件,为实际操作的改进提供更多的理论依据。

Long-distance ultrasonic radars are installed on actual vehicles,with 2 at the front and 4 at the rear.When the vehicle passes through an empty parking space,the long-distance ultrasonic radar can sense the obstacles around it and identify the parking space.The results show that the ultrasonic radar is controlled through LIN bus serial communication network and through digital signal substitute for analog signal,and the lateral and longitudinal parking spaces calculated through fitting curve enjoy advantages of being accurate,simple,practical,effective,and low-cost.Thus,it can create conditions for application of intelligent parking technology in medium and low-end cars,and provide more theoretical basis for improvement of practical operations.