倒车防撞报警系统.docVIP

摘 要 随着经济社会的飞速发展，手工业应经不适应现在都市发展的节奏，特别是汽车行业，更是追求的节能，实用，安全为一体的车型，来满足人们的需求，如今很多技术运用在汽车行业，如太阳能，电能的应用来缓解能源的紧张，如行车倒车导航的应用更是提高了行车的安全性和方便性。 我这里介绍的是基于单片机超声波测距报警系统。系统主要是以AT89S51单片机为核心，利用超声波测距原理及51单片机内部计时计数原理，计算距离。同时利用LED显示，显示中间距离，还有报警的功能。这里还介绍了超声波测距的原理和特性，及整个模块的各个模块的设计，这里由主程序，发射子程序，接受子程序，显示子程序，报警子程序等模块组成。这里还介绍了系统的软件结构，整体的功能通过软件的编写来实现，硬件电路中还包括滤波电路，放大电路和整形电路。最后，处理系统可能出现的误差，给出相应的方案和改进措施。 这套系统软硬件设计合理、抗干扰能力强、实时性良好，经过系统扩展和升级，可以实现汽车倒车报警。 关键字：单片机，超声波发射接收系统，测距，报警 ABSTRACT With the development of social economy and transportation industry is booming, the number of cars in greatly increased. More and more people have their own cars, the accidents caused by parking and reversing had increased at the same time. In view of this situation, design a kind of fast response, high reliability and cheaper the automotive anti-collision warning system is imperative. Therefore, help drivers parking and of reversing the reverse alarm arises at the historic moment. This paper introduces a kind of based on microcontroller pulse reflecting type ultrasonic ranging measuring alarm system. This design mainly AT89S52 microcontroller core, using ultrasonic sensors for the features and advantages of the ultrasonic ranging system, combining the ultrasonic ranging system AT89S52 microcontroller, display ultrasonic ranging design method. Expounds the principle and characteristics of ultrasonic sensor, the entire circuit USES modular design, the main program, preset subroutines, launch subroutines, receiving subroutines, display subroutines, alarm subroutines etc module. This paper introduces the main software structure, system by writing a program to achieve system function. Hardware circuit including filter circuit, amplifying circuit and shaping circuit. Finally, analyzes the influential factors and through the system error of the system analysis, presented system improvement plan. The system hardware and software design is reasonable, strong anti-jamming capability, good real-time performance, after syst