目 录
摘 要 ......................................................................................................................................................................i
Abstract..................................................................................................................................................................ii
第 1 章 绪 论 .................................................................................................................................................1
1.1 课题研究意义 .............................................................................................................................................1
1.2 国内外现状 .................................................................................................................................................2
1.3 主要研究内容 .............................................................................................................................................2
第 2 章 系统方案选择与论证 .......................................................................................................................3
2.1 各模块方案选择和论证 .............................................................................................................................3
2.1.1 液体点滴速度及储液瓶液面检测 ......................................................................................................3
2.1.2 液瓶液面检测 ......................................................................................................................................4
2.1.3 键盘方案 ..............................................................................................................................................5
2.1.4 显示方案 ..............................................................................................................................................5
2.1.5 电机系统方案 ......................................................................................................................................5
2.1.6 点滴速度控制方案 ..............................................................................................................................5
2.2 方案的确定 .................................................................................................................................................5
第 3 章 系统硬件设计与实现 .......................................................................................................................5
3.1 系统硬件基本组成部分 .............................................................................................................................5
3.2 电路模块电路设计 .....................................................................................................................................5
3.2.1 液体点滴速度检测电路设计 ..............................................................................................................5
3.2.2 键盘控制电路 ......................................................................................................................................5
3.2.3 步进电机驱动电路 ..............................................................................................................................5
3.2.4 系统原理图 ..........................................................................................................................................5
3.2.5 输液管的机械控制 ..............................................................................................................................5
3.3 元器件说明 .................................................................................................................................................5
3.3.1 AT89C52 ..............................................................................................................................................5
3.3.2 集成运算放大器 LM324N ..................................................................................................................5
3.3.3 电压比较器件 LM339 .........................................................................................................................5
3.3.4 步进电机及其驱动 ULN2003 .............................................................................................................5
3.3.5 1602 型 LCD ........................................................................................................................................5
第 4 章 系统软件设计 ...................................................................................................................................5
4.1 点滴速度测量 .............................................................................................................................................5
4.2 点滴速度控制 .............................................................................................................................................5
4.3 键盘扫描 .....................................................................................................................................................5
4.4 液晶显示 .....................................................................................................................................................5
4.5 系统源程序 .................................................................................................................................................5
结 论 .....................................................................................................................................................................5
致 谢 .....................................................................................................................................................................5
参考文献 ...............................................................................................................................................................5
附录 A....................................................................................................................................................................5
附录 B....................................................................................................................................................................5
附录 C....................................................................................................................................................................5