目 录
第一章.绪论....................................................................................................................................1
一.酒精浓度检测仪的背景............................................................................................................1
二.酒精浓度检测仪现状及发展趋势............................................................................................2
三.本课题实现目标........................................................................................................................2
四.本章小结....................................................................................................................................2
第二章 设计方案和元器件选择......................................................................................................3
一.设计方案....................................................................................................................................3
二.元器件选择................................................................................................................................3
1.单片机的选择.................................................................................................................................3
2.传感器............................................................................................................................................5
3.数模转换器....................................................................................................................................6
4.AT24C02 存储器.............................................................................................................................7
5.LCD 显示.......................................................................................................................................8
三.本章小结....................................................................................................................................9
第三章 硬件设计............................................................................................................................10
一.硬件设计原理..........................................................................................................................10
二.硬件设计的外围电路..............................................................................................................11
1.晶振电路......................................................................................................................................11
2.复位电路......................................................................................................................................12
3.报警设计......................................................................................................................................13
4.电源电路.......................................................................................................................................14
5.信号调制电路...............................................................................................................................15
6.A/D 转换设计...............................................................................................................................15
7.外围扩充存储器电路..................................................................................................................17
三.本章小结..................................................................................................................................17
第四章 系统软件的设计................................................................................................................19