[电子设计精品] 基于超声波的检测防撞系统的设计.doc

毕业设计中文摘要
基于超声波的汽车防撞预警系统是指在汽车行驶过程中通过超声波测距原理,防止汽车发生碰撞障碍物的一种智能报警装置。本次设计由超声波发射模块、信号接收模块、单片机处理模块、数码显示模块以及声光报警模块等部分组成。它由单片机智能控制,能使汽车在行驶和倒车过程中自动检测到障碍物。然后通过超声波测距原理测量出汽车与障碍物之间的距离,并通过数码显示模块将测得的距离显示出来,当汽车与障碍物之间的距离达到安全极限时,单片机控制声光报警模块发出报警信号,达到提醒司机防止撞车的目的。本设计充分发挥了单片机的性能,其硬件电路简单,软件功能完善,控制系统可靠,具有一定的使用和参考价值。
关键词超声波测距汽车防撞预警单片机
毕业设计外文摘要
Title The design based on ultrasonic detection anti-collision system
Abstract
The warning system is a kind of intelligent alarm device based on the automotive anti-collision whose automobile driving process through the ultrasonic ranging principle can prevent cars from colliding obstacles. This design posed of ultrasound module, the signal receiving module, single-chip puter processing module, digital display module and the acousto-optic alarm ponents. It is controlled by the single-chip intelligent microcontroller and it can automatically detect obstacles in car driving and the back-draft driving process. Then it can also measure the distance between cars and obstacles through the ultrasonic ranging principle and it will display the measurable distance through digital display module. When the distance between the cars and the obstacles reaches the safety limited level, the acousto-optic alarm module of SCM control will utter a warning signal to achieve the purpose of reminding drivers of the potential crash they may encounter. This design thoroughly functions the features of the microcontroller performance with its hardware circuit simple, perfect plete software function, reliable control system, therefore, it will definitely give us its usefulness and reference value.
Key Words Ultrasonic ranging automotive anti-collision warning microcontroller
1 绪论
曾几何时,汽车对很多家庭来说是不敢想象的。但随着社会生产力的发展和经济水平的大幅度提高,让百姓的收入日益鼓胀,解决了温饱问题的家庭开始走向小康,表现得最明显的是交通工具的升级换代上:一些家庭开始购买汽车作为自己的代步工具。
近几年我国汽车保有量逐年增加,2009年的保有量为6300万辆,2010年达到7400多万辆。按保守估计,,即大约350辆/千人。对于汽车数量的大副度攀升,尽管国家在公路设施上不断地改进,但道路上的车辆仍然还是越来越多,尤其在上下班时段完全避免不了公路上汽车拥挤的现状。再加上在汽车设计上车速的不断提高,虽然公路上各路段都有