目录
第一章 绪论 ....................................................................................................................................3
1.1 课题背景及其意义 ...........................................................................................................3
1.2 国内外的研究状况 .......................................................................................................3
1.3 本文的主要研究内容及论文结构安排.............................................................................4
第二章 方案的设计与论证.............................................................................................................4
2.1 控制方案的确定.................................................................................................................4
2.2 控制方式的选择.................................................................................................................4
2.2.1 单片机芯片的选择.................................................................................................5
2.2.2 声音报警电路方案的选择......................................................................................5
2.2.3A/D 采样芯片的选择...............................................................................................6
第三章 硬件电路的设计.................................................................................................................6
3.1 系统的功能分析及体系结构设计.....................................................................................6
3.1.1 系统功能分析..........................................................................................................6
3.1.2 系统总体结构..........................................................................................................6
3.2 模块电路的设计.................................................................................................................7
3.2.1STC89C52 单片机核心系统电路的设计 ................................................................7
3.2.2 5V 电源电路设计..................................................................................................10
3.2.3 5V 风扇控制电路设计..........................................................................................11
3.2.4 蜂鸣器报警电路设计...........................................................................................11
3.2.5 5V 继电器控制电路设计......................................................................................12
3.2.6 LED 信号指示灯电路设计 ...................................................................................13
3.2.7 PCF8591 A/D 采样电路设计................................................................................13
3.2.8 MQ-9 可燃气体传感器模块电路设计 .................................................................14
第四章 软件设计 ..........................................................................................................................16
4.1 编程语言选择..................................................................................................................16
4.2 keil 软件设计思想............................................................................................................16
4.3 程序流程图 .....................................................................................................................17
第五章 系统焊接与调试...............................................................................................................18
5.1 电路焊接 .........................................................................................................................18
5.2 系统调试 .........................................................................................................................19
5.2.1 系统程序调试.......................................................................................................19
5.2.2 硬件测试................................................................................................................19
5.3 实物测试..................................................................................................................20
致谢 ................................................................................................................................................21
参 考 文 献 ..................................................................................................................................22
