介绍了一种基于单片机的汽车倒车测距仪的软硬件设计过程,系统以STC89C52为控制核心,采用温度补偿的超声波测距系统,实现倒车防撞报警功能。该倒车测距仪能测量并显示车辆后部障碍物与车的距离,同时用间歇的“嘟嘟”声发出报警,“嘟嘟”声的间隙随离障碍物距离的缩短而缩短。该系统的测距范围是0.1m-10m,具有结构简单、体积小、使用方便等特点。
Introduces a kind of hardware and software design process of automobile reverse distance measuring instrument based on MCU,the system uses STC89C52 as the control core,the ultrasonic ranging system with temperature compensation,realize the back-draft anti-collision alarm function.The telemeter for measuring and displaying the rear of the vehicle and the vehicle obstacle distance,at the same time with intermittent"beep"sound the alarm,"gap toot"sound decreases with the shortening of distance between obstacle.The range of the system is 0.1m-10m,which has the advantages of simple structure,small volume, convenient use etc.