基于单片机输液监控系统设计.doc

PAGE \* MERGEFORMAT PAGE \* MERGEFORMAT II 摘 要 输液是医院常用的治疗手段，传统输液过程中存在着输液速度不精确，需要人工监护等弊端。本文设计了一种以C8051F410单片机为核心的布线式输液监控系统用以解决此问题。 系统通过RS-485接口实现有线通信与监控，具有液滴检测，液滴速度调控，报警等功能。采用红外传感器技术检测液滴和输液高度，单片机用以实现输液速度计算和显示，通过查询键盘，将实时设定的点滴速度值与实际输液速度进行比较，来控制步进电机调节输液瓶高度，从而控制点滴速度，输液结束或异常时自动报警提示。 关键词: 输液监控；单片机；液滴检测；速度调控 ABSTRACT Infusion as a treatment is commonly used in hospital. During the traditional transfusion, the rate of infusion is imprecise, it also requires manual monitoring and exists other defects. This paper design a cabling type system which using C8051F410 single-chip as its core to solve above-mentioned problems. This system through the RS-485 interface to achieve communication and monitoring, It has many functions, such as testing the drop, controlling the speed of drop and alarm functions. Using infrared sensors to detect a liquid drop and the height of liquid medicine, the micro-controller achieve to calculate and display the speed of drop.From querying the keyboard in real time to read the value of the set rate, the system compares the set rate with the actual infusion rate to control the stepper motor running to adjust the infusion bottle’s height, and thus control the rate of drop.When the infusion is ending or abnormal,the system will start the alarm program. KEYWORD: infusion monitor; single-chip;speed detection;speed control 目 录 摘要 Ⅰ ABSTRACT Ⅱ 第1章 引言 1 1.1 课题背景 1 1.2 课题研究的目的和意义 1 1.3 论文的组织结构 2 第 2章 系统总体设计 3 2.1 系统整体框图 3 2.2 C8051F410单片机介绍 3 第 3章 系统硬件设计 5 3.1 方案论证 5 3.1.1液滴速度检测方案 5 3.1.2液位检测方案 5 3.1.3速度控制方案 5 3.1.4电机选择及控制方案 6 3.1.5键盘显示单元 6 3.2 模块的硬件设计 7 3.2.1系统的组成单元 7 3.2.2 通信接口电路设计 8 3.2.3液滴信号检测模块 8 3.2.4键盘及显示模块 8 3.2.5声光报警模块 13 3.2.6电动机驱动模块 13 第 4章 系统软件设计 14 4.1 软件设计框架 14 4.2 芯片主要寄存器介绍 16 4.2.1 PCA计数器/定时器 16 4.2.2 PCA捕捉/比较模块 16 4.2.3 PCA控制寄存器 17 4.3 算法分析与实现 18 4.3.1 电动机的转速 18