毕业设计_蔽障循迹智能小车.doc

2013年 7 月12日 一、绪论.......................................................................4 1.1智能小车的作用和意义..................................................................4 二、方案设计与论证 ................................................ 4 2.1 总体方案设计 ...............................................................................4 2.2主控系统 ........................................................................................5 2.3传感器选择方案 ............................................................................6 2.4电机驱动芯片选择方案..................................................................6 2.5电机方案选择..................................................................................6 2.6电源方案选择..................................................................................7 三、主要器件介绍 .....................................................7 3.1 STC89C52的介绍 .........................................................................7 3.2 L298N的介绍 ...............................................................................8 3.2.1 L298N的引脚功能 ................................................................................... 9 3.2.2 L298N的运行参数 ...................................................................................10 3.2.3 L298N的逻辑控制 ................................................................................... 10 3.3 TCRT5000的介绍 ........................................................................ 11 3.4LM339的介绍 ................................................................................12 3.5 L7805CV和L7806CV的介绍.........................................................12 四、硬件设计 ............................................................... 14 4.1 主控芯片STC89C52单片机最小系统板电路 ........................... 14 4.2 电机驱动模块电路..........................................................................15 4.3红外对黑线检测模块电路...............................................................16 4.4稳压电源电路.................