超声波

代码说明：

说明：  基于51单片机的超声波测距显示系统，利用超声波模块进行测距，通过数码管显示数值，代码简单，通俗易懂。(The ultrasonic ranging display system based on 51 single chip computer uses the ultrasonic module to measure the distance. The numerical value is displayed by the digital tube. The code is simple and easy to understand.)