中文说明：详细解说了相位差计算方法，由相位差可以计算时延，从而获得距离信息，本程序实际仿真了相位差的获取过程，精度相当高，能够直接拿来应用，供大家参考
English Description：
Detailed explanation of the phase difference calculation method can be calculated from the phase delay to obtain distance information, the program simulates the actual phase of the acquisition process, the accuracy is very high, the application can be directly used for reference