用51单片机控制超声波，采用中断方式，用于小车的蔽障，超声波的距离在一米左右,51 single-chip control with ultrasound, using interrupt mode, the cover for the vehicle barrier, ultrasonic distance meters in a

基于keil软件编写的液晶显示距离（需要配超声波探头）-Keil software development based on liquid crystal display distance (needs with the ultrasonic probe