基于单片机超声波测距仪汽车防撞系统毕业设计说明书论文.doc

PAGE PAGE III 毕业生 毕业设计说明书 题 目: 基于单片机超声波测距仪汽车防撞系统 摘 要 随着汽车的不断普及，特别是中国汽车市场的不断扩大，由汽车带来的一系列问题一一显露，本文介绍的防撞报警系统为汽车的倒车报警装置的研究提供了一些可行性方案。本文设计的基于单片机超声波测距仪汽车防撞系统采用STC89C52为控制中心，超声波测距仪完成对距离的检测，测出距离以后将数据交给单片机处理运算（与设定的距离值进行比较判断），距离的值可以通过按键设置（有效范围为2cm-400cm），设定值的大小通过数码管显示出来，当测定的距离小于设定值的时候，STC89C52便发出控制指令控制蜂鸣器发出报警声，从而达到报警防撞的目的。由于超声波测距系统具有不接触，受外界干扰较少的优点，所以在汽车的倒车技术研制方面得到了很广泛的应用。 关键词： STC89C52 超声波测距仪 汽车防撞报警 Title Auto ultrasonic range finder collision avoidance system based on MCU Abstract With the popularity of cars, especially Chinese car market continues to expand, a series of problems brought by car of the one show, this paper introduces the research of anti-collision alarm system for vehicle reversing alarm device provides some feasible solutions. This design based on single chip ultrasonic rangefinder automotive anti-collision system uses STC89C52 as the control center, the ultrasonic range finder of distance detection, measure the distance after the data to the microcontroller processing operations (distance and set values of judgment), distance value can set the button (range 2cm-400cm), setting value the size through the digital display, when the measured distance is smaller than the set value, the STC89C52 sends control command to control the buzzer alarm sound, so as to achieve the purpose of anti collision alarm. The ultrasonic ranging system has the advantages of no contact, less interference, so it has been widely used in the development of the technology of automobile reversing. Keywords STC89C52 Ultrasonic rangefinder Vehicle collision warning 目 次 1 绪论…………………………………………………………………………………1 1.1所选题目背景………………………………………………………………………………1 2 方案设计和论证………………………………………………………………………………1 2.1方案设计……………………………… ………………………………1 3 ×××××（正文第3章） ……………………………………………… Y ………………………………………（略） X ×××××（正文第X章）………………………………