基于单片机的汽车倒车雷达系统毕业设计(论文).doc

毕 业 设 计(论文) 题 目：基于单片机的汽车倒车 雷达系统设计 基于单片机的汽车倒车雷达系统设计 成都工业学院2013届毕业设计（论文） PAGE \* MERGEFORMATiii 摘 要 随着社会经济的发展交通运输业日益兴旺，汽车的数量在大副攀升。交通拥挤状况也日趋严重，撞车事件屡屡发生，造成了不可避免的人身伤亡和经济损失，针对这种情况，设计一种响应快，可靠性高且较为经济的汽车倒车防撞预警系统势在必行。本设计是利用最常见的超声波测距法来设计的一种基于单片机的汽车倒车雷达系统。 本设计的主要是基于AT89C51单片机利用超声波的特点和优势，将超声波测距系统和AT89C51单片机结合于一体，设计出一种基于AT89C51单片机的汽车倒车雷达系统。该系统采用软、硬件结合的方法，具有模块化和多用化的特点。 本设计论文概述了超声波检测的发展及基本原理，阐述了超声波传感器的原理及特性。在超声波测距系统功能和AT89C51单片运用的基础上，提出了系统的总体构成，对系统各个设计单元的原理进行了介绍，并且对组成各单元硬件电路的主要器件做了详细说明和选择。本设计论文还介绍了系统的软件结构，并通过编程来实现系统功能和要求。 关键词：汽车倒车雷达、AT89C51、超声波、测量距离、LED数码管 Abstract As social and economic development of the transport industry booming, the number of cars in the first mate to climb. Traffic congestion has become increasingly serious crash occurred frequently, resulting in the inevitable personal injury and economic loss, for this situation, design a fast response, high reliability and more economical car reversing collision warning system is inevitable line. The most common design is the use of ultrasonic distance measurement method to design a microcontroller based car reversing radar system. The design is mainly based on AT89C51 microcontroller features and advantages of the use of ultrasound, ultrasonic ranging system and AT89C51 microcontroller combined in one design a car based on AT89C51 microcontroller reversing radar system. The system uses software and hardware combination of methods. The paper outlines the design of the development of ultrasonic testing and the basic principles expounded the principle and characteristics of ultrasonic sensors. In the ultrasonic ranging system functions and AT89C51 monolithic application, based on the overall composition of the system proposed, each of the design elements of the system were introduced the principle and hardware circuit for each unit composed of the main components of a detailed description and choices. The paper also describes the design of system software architecture, and is programmed to impleme