目录
摘要 .............................................................................................................................................I
Abstract ......................................................................................................................................II
1 引言.........................................................................................................................................1
1.1 课题背景 ......................................................................................................................1
1.2 研究意义 ......................................................................................................................1
1.3 研究综述 ......................................................................................................................1
1.3.1 国外研究和发展现状 ........................................................................................1
1.3.2 国内研究和发展现状 ........................................................................................2
1.4 系统设计总体思路 ......................................................................................................2
2 系统方案设计.........................................................................................................................3
2.1 系统设计内容 ..............................................................................................................3
2.2 系统方案论证 ..............................................................................................................3
2.2.1 主控方案选择 ....................................................................................................3
2.2.2 电源电路选择 ....................................................................................................4
2.2.3 按键电路选择 ....................................................................................................5
2.2.4 显示器的选择 ....................................................................................................5
2.2.5 AD 采样选择 ......................................................................................................5
2.2.6 语音识别模块选择 ............................................................................................6
3 系统硬件设计.........................................................................................................................7
3.1 单片机 ..........................................................................................................................7
3.2 单片机最小系统 ..........................................................................................................8
3.3 液晶显示电路设计 ......................................................................................................9
3.4 按键模块电路设计 ....................................................................................................11
3.5 雨滴采集电路设计 ....................................................................................................11
3.6 ADC 模数电路设计....................................................................................................12
3.7 语音电路设计 ............................................................................................................12
3.8 步进电机电路设计 ....................................................................................................13
