I自动车距保持控制系统设计摘 要距离的自动检测的应用是非常的广泛,它主要是应用于一些的建筑工地、施工现场以及一些工业的距离的检测预测量,并且超声波的应用也是非常的广泛,例如测量在水中的声音强度,水的深度,以及在水中可以很准确的知道鱼群的准确位置,金属类的探测器,地表层的防腐物质等等。本设计指出研发汽车自动车距保持控制系统,此处隐含自动检测距离以及报警作用其中通过超声波传感器完成计算距离。在可行性探究以及可靠性探究的前提上,本文研发了完善的以 AT89C52 单片机为基础的超声波测距系统。依照超声波在空气充传播的反射理论,通过界面创建超声波传感器,通过单片机科技以及超声波时差法在空气中测算真实距离。此系统一般由众多模块构成,主要是中央处理模块、超声波发射/接收模块、显示以及报警模块。本设计以 51 单片机系统的 I/O 接口组件,让超声波传感器发射40kHz 的超声波以及超声波反射回来,利用增加整形电路送入单片机,之后开展调试,明确具体的距离。上述单片机超声波测距具备明显的超声波抗干扰水平,降低了人为测算的问题,减少了外部接口电路,处理了一般生活中的测距问题。关键字:超声波的传感器 AT89C52 单片机 显示模块 报警模块IIIIIAbstractThe automatic measuring of distance is mainly used in measuring the distance of Car Backing reminding, construction sites, industrial site, etc. The application of ultrasonic testing the distance is very widely. such as the measure of the depth of the water, the place of the fish in the sea, the metal detection 、the measure of the thickness and the reverse in case of the car clashing and so on. The design requirements for the design of automatic car spacing control system, which includes automatic detection distance and automatic alarm function. This design uses ultrasonic sensor to measure the distance. On the basis of feasibility analysis and reliability analysis, a set of ultrasonic ranging system based on AT89C52 MCU is designed. According to the principle of ultrasonic wave propagation in the air, the ultrasonic sensor i...