【摘要】 为了检测电动自行车是否超速,本文设计了一种移动电动自行车测速测距系统。该设计采用77GHz毫米波雷达,在AWR1642采集到回波信号后,在时域上进行FFT,通过计算其相位的变化、CFAR处理、峰值聚集、多普勒补偿等后,得出车辆的距离、速度和行驶角度,并用CAN总线传送数据到上位机,车辆的运动可以在MATLAB的界面进行实时显示。将验证系统固定在公路边的平台上,对普通家用电动自行车进行测量测试结果表明,该系统可以准确测出电动自行车的距离、速度等信息。更多还原

【Abstract】 In order to detect whether the E-bike is speeding,a speed and distance measurement system of mobile electric bicycle based on AWR1642 is designed.In this design,77 GHz millimeter wave radar is used.After AWR1642 collects the echo signal,FFT is carried out in the time domain.After calculating the phase change,CFAR processing,peak gathering,Doppler compensation,etc,thedistance,speed and driving angle of the vehicle are obtained,and the data is transmitted to the upper computer by CAN bus.The movement of the vehicle can be displayed in real time in the MATLAB interface.The verification system is fixed on the platform beside the road to measure the distance and speed of the ordinary household electric bicycle.The test shows that the system can effectively detect the distance,speed and driving angle of the vehicle.更多还原