大学毕设论文__基于单片机的倒车雷达系统设计.doc

基于单片机的倒车雷达系统设计 学生： 指导教师： 内容摘要：随着科学技术的飞速发展，汽车已经由原来的奢侈品变为现在人们日常生活工作中的必需品，在汽车生活中单片机作为一种结构简单价格低廉的控制系统逐渐得到运用。在实时检测和自动控制的单片机应用系统中，单片机一般是作为一个系统的核心部件来使用。单片机是把主要计算机功能部件都集成在一块芯片上集计数和多种接口于一体的微型计算机。它是一种集计数和多种接口于一体的微控制器。而51单片机是一种最为典型最有代表性的单片机。 本设计主要应用AT89S51作为控制核心，与显示器，驱动电路等相结合的系统。利用单片机AT89S51作为报警装置的控制器，能充分发挥AT89S51的数据处理和实时控制功能。使系统工作于最佳状态，提高系统的灵敏度。本次设计的超声波倒车雷达具有体积小、使用方便、硬件电路简单、软件功能完善、控制系统可靠等优点，是现代社会发展必不可少的工具和动力。本设计将安全距离设为0.5m，就可作为汽车倒车报警器，提高汽车倒车时的安全性。该防撞报警器利用超声波实现对汽车的测距，利用单片机的实时控制和数据处理功能完成系统的控制，文章给出了报警器的硬件电路原理及软件设计。 关键词：单片机 AT89S51 超声波 Based on AT89S51 back-draft radar systems design Abstract: In recent years, Along with the science and technology and economy fly ceaselessly, cars have by original luxury into now people daily life work, the necessities in automotive life as a kind of simple structure microcontroller inexpensive control system can be applied gradually. In real-time detection and automatic control of microcomputer application system, microcontroller is generally as a component to the core of the system of the heart for a system function. The main function of single chip computer is computer parts were integrated in a chip used to count and various interface in the integration of microcomputer. This design USES 51 SCM is a most typical most representative of microcontroller. This design main application AT89S51 as control core, and display, drive circuit combination of system. AT89S51 microcontroller as alarm device controller, can make full use of data processing and AT89S51 real-time control function. Make the system work in the best condition, and improve the system of sensitivity. The design of ultrasonic reverse radar has small volume, convenient, hardware circuit is simple, perfect function, control system software reliability, is the modern social development essential tools and power. This design will be safe distance set to 0.5 m, can be used as automobile reverse alarm, improve the safety car while bac