超声波测距串口显示，使用51单片机产生波，通过超声波发射模块发射，然后计算出发射与接收的时间从而计算出与物体相隔距离，然后通过串口，在上位机上显示出数据。-Ultrasonic Ranging serial display, the use of 51 single-generation wave emitted by the ultrasonic transmitter module, then calculate the transmission and reception of the time interval to calculate the distance to the object, and then through the serial port on the host computer display the data.