目 录
摘要..................................................................................................................................................I
Abstract ...........................................................................................................................................II
第 1 章 绪论................................................................................................................................1
1.1 课题来源及研究的目的和意义....................................................................................1
1.2 国内外在该方向的研究现状及分析............................................................................1
1.3 本课题研究的主要内容................................................................................................2
第 2 章 本设计用到的主要元器件............................................................................................3
2.1 数模转换芯片................................................................................................................3
2.2 52 单片机.......................................................................................................................4
2.2.1 AT89S52 的特点.................................................................................................4
2.2.2 管脚说明 .............................................................................................................5
2.3 驻极体话筒....................................................................................................................6
2.4 光敏电阻........................................................................................................................7
2.5 电磁继电器....................................................................................................................7
2.6 时钟芯片........................................................................................................................7
2.7 本章小结........................................................................................................................9
第 3 章 硬件电路的原理与设计..............................................................................................10
3.1 概述..............................................................................................................................10
3.2 系统设计原理框图......................................................................................................10
3.3 供电模块......................................................................................................................11
3.4 单片机控制模块..........................................................................................................11
3.5 LED 恒流驱动电源模块.............................................................................................12
3.6 路灯信号检测模块......................................................................................................13
3.6.1 时钟驱动电路 ...................................................................................................13
3.6.2 声控电路 ...........................................................................................................14
3.6.3 环境光线及故障检测电路 ...............................................................................14
3.7 声光报警模块..............................................................................................................15
3.8 按键模块......................................................................................................................15
3.9 显示模块......................................................................................................................16
3.10 本章小结 ......................................................................................................................16
第 4 章 软件设计......................................................................................................................17
4.1 概述..............................................................................................................................17
4.2 程序设计步骤..............................................................................................................17
4.3 软件开发环境..............................................................................................................17
