摘 要：随着社会的发展，科技的进步，医疗设备也逐步进入智能化，传统的人工监护方式已经不能适应当今医疗监护需求。鉴于国内医疗机构输液人工监控工作量大，且不够精确的现状，并针对目前市面上智能输液监控系统成本昂贵，普及困难等问题，设计了一种以单片机AT89C52为核心，以键盘及红外对射式传感器作为输入系统，以步进电动机及数码管作为输出系统的智能化液体点滴速度监控装置。键盘为按键输入系统，两个红外对射式传感器分别用于检测液体点滴速度和输液瓶液面是否低于警戒值，步进电动机通过单片机可以自如控制吊瓶的上、下缓移，由此达到智能监控液体点滴速度的目的。本系统具有结构简单，实用性强，且成本低等优点，具有一定的应用价值。57860

毕业论文关键词：单片机，红外对射式传感器，步进电动机

Abstract：With the development of society, the progress of science and technology, medical equipment is also gradually to the intelligent, the traditional way of manual monitoring has been unable to meet the health care needs. Since the domestic medical transfusion artificial monitoring workload is big and the present situation is not precise enough. Also  currently on the market for intelligent monitoring system for transfusion is expensive, difficult problem of popularity, so we design a microcontroller AT89C52 as the core, with a keyboard and infrared correlation type sensor as input system,  the intelligent liquid drop speed monitoring device of stepping motor and digital tube as the output system. Keyboard input system for buttons, two infrared correlation type sensor to detect the liquid drop speed and the transfusion bottle liquid level is below the alert value. Step motor controlled by single-chip microcomputer can freely move the bottle to achieve the goal of intelligent monitoring liquid dropping speed. This system has simple structure, strong practicability and low cost advantages. It has a certain application value. 

Keywords： SCM, Infrared correlation type sensor, Stepper motor

目录

1 引言 5

1.1 单片机系统概述 5

1.1.1 单片机的基本概念及特点 5

1.1.2 单片机的发展过程 5

1.1.3 单片机的应用领域 6

1.1.4 单片机智能输液的研究意义及发展方向 7

2 系统方案设计 8

2.1 系统工作原理 8

2.2 步进电动机的驱动选择 9

2.3 红外传感器的选择 9

2.4 键盘与显示的选择 9

3 系统硬件设计 9

3.1 红外测速及储液监控模块 9

3.2 点滴速度控制电路设计 11

3.3 键盘显示电路 12

4 系统软件设计 14

4.1 检测点滴速度子程序 16

4.2 点滴速度控制子程序 18

4.3 键盘显示子程序 18

5 系统的仿真 22

结论 23

参考文献 24

致谢 25

附录 26

1 引言