源码实现的功能是超声波的360度全向测距，主要是用于智能小车中的快速的目标搜寻查找，主要是在机器人对抗赛中避免目标的丢失，如果使用了360度的目标搜寻就可以很快地调用先关的控制机制，主要用于有转动台的超声波测距。-Source function is implemented 360-degree omni-directional ultrasonic ranging, the smart car is mainly used in the quick search to find the target, the main goal is to avoid losing the match in the robot, if you use a 360-degree target search can be very quickly call control mechanisms related to the first, mainly used ultrasonic ranging turntable.