车载自组网车载模块设计论文

车载自组网车载模块设计 学院名称： 汽车与交通工程学院 专业： 汽车服务工程 班级： 12汽服4 学号： 12323411 姓名： 黄 掘 指导教师姓名： 冀雯宇 指导教师职称： 助理实验师

本科毕业设计（论文） JIANGSU UNIVERSITY OF TECHNOLOGY 江苏理工学院毕业设计说明书（论文） 车载自组网车载模块设计

摘要：随着车辆的普及，交通的日益发达也是一把双刃剑，人们虽然出行变得方

便，但是道路也日益拥挤，交通事故频频发生，车载自组网就应运而生，国内外对于车载自组网的研究也早已开始。车载自组网的应用可以大大减少交通事故的发生，有效的减轻交通压力，并且车载自组网的应用及其广泛，如已投入使用的不停车收费系统等，大大的改善了人们的出行条件，所以其发展前景是十分广阔的。本设计主要是模拟车载自组网，主要设计其通信系统，本设计主要设计车与车、车与路边单元之间的互相通信，使用中转端模拟路边单元，利用转速和距离作为数据源，使用光电传感器采集转速数据，超声波距离传感器采集距离信号，无线通信方式采用射频芯片nRF24L01，用于传输数据，使用1602液晶模块显示发送端和接收端的信息，对车载自组网的无线通信系统进行模拟。 关键字：车载自组网；无线通信；车载模块；STC89C52；nRF24L01

Vehicular ad hoc vehicle module design Abstract：With the population of vehicles, the daily thriving transportation becomes a double-edged sword. On one side, it brings people a lot of convenience; however, meanwhile the more increased traffic on the road brings more traffic accidents, which brings forth the growth of vehicular ad-hoc networks. The research of vehicular ad-hoc networks at domestic already started for a long time. The application of vehicular ad-hoc network can dramatically reduce the happening of the traffic accidents and effectively release the transportation pressure. The vehicular ad-hoc network is widely used in different fields, which for example has been put into operation in Electronic Toll Collection, which has greatly improved the travel conditions of the public. The development of vehicular ad-hoc networks has expansive prospect. This design is mainly to imitate vehicular ad-hoc network, majored in the design of its communication system, which focus on the mutual communication between vehicles and itself and vehicles and road side unit. The road side unit is replaced by transfer terminal, by 江苏理工学院毕业设计说明书（论文） using the revolving speed and distance as the data source. The revolving speed data is gathered by photoelectric sensor, and the distance signal is gathered by Ultrasonic distance sensors. To adopt radiofrequency chip realize wireless communication, used for data transmission, 1602 modules is used to show the information from transmitting terminal and receiving terminal, to achieve the imitation of the wireless communication system of vehicular ad-hoc network. Keywords:vehicular ad hoc networks；wireless communication；vehicle module； STC89C52；nRF24L01 江苏理工学院毕业设计说明书（论文） 目录

第一章 概述 ............................................................................................ 1 1.1车载自组网的意义 .............................................................................. 1

1.2车载自组网的国内外发展现状 ............................................................... 2

1.3本设计的设计内容及设计指标 ............................................................... 4

第二章 系统设计方案 .............................................................................. 5 2.1车载自组网结构方案 ........................................................................... 5

2.1.1车载自组网的总体结构 ....................................................................... 5 2.1.2车载单元设计 .................................................................................. 8 2.1.3路边单元设计 .................................................................................. 9 2.2通信系统设计方案 ............................................................................. 10

2.2.1无线通信方式 ................................................................................. 10 2.2.2.单片机 ........................................................................................ 11 2.2.3无线通信芯片 ................................................................................. 11 2.2.4转速传感器.................................................................................... 12 2.2.5超声波距离传感器 ............................................................................ 13 2.3系统的组成和各组成部分的功能 ........................................................... 14

2.4本章小结 ......................................................................................... 14 江苏理工学院毕业设计说明书（论文） 第三章 硬件电路 ................................................................................... 16 3.1单片机最小系统电路 .......................................................................... 16

3.1.1单片机控制电路 .............................................................................. 16 3.1.2电源电路 ...................................................................................... 16 3.1.3时钟电路 ...................................................................................... 17 3.1.4复位电路 ...................................................................................... 17 3.1.5程序下载电路 ................................................................................. 18 3.2nRF24L01无线通信模块收发端 ............................................................. 18