毕业的设计基于单片机的输液保温控制系统.doc

基于单片机的输液保温控制系统 摘 要 关键词： Abstract There is a medical problem that patient may feel uncomfortable and dizzy, even may go into syncope when he is being given an infusion at a relatively low room temperature. And according to how to solve this problem，the paper will discuss the research and development of the infusion constant temperature system controlled by SCM(Single-Chip Microcomputer). In the lower room temperature situation, when this kind of medical device works it can keep the temperature of liquid medicine that is going into the body of patient at about 20℃. Then patient can finish the process of infusion comfortably and these adversities can be avoided when patient is given an infusion at a lower room temperature. The selection ways of the control system will be discussed in this paper. In order to maintain the output temperature of liquid medicine at about 20℃, 8051 signal microprocessor which has good performances and lower price as a control unit is selected to build up a practical signal microprocessor application system. By manual output temperature control of liquid medicine, some heating data varying with room temperature and infusing speed are acquired. Output temperature of infuser can be controlled by PID. Experimental results show that the control circuit of the new instrument is simple in structure and reliable in control performance. So SCM infusion insulation control system has widely application prospect and popularization value. Key words: PID control; constant temperature; SCM 目 录 摘 要 I Abstract II 第一章 引 言 3 1.1 医用智能仪器设计时应考虑的相关因素 3 1.2 本文的主要研究工作和各章内容安排 3 第二章 系统总体设计 3 2.1 系统总体方案论证 3 2.1.1 加热位置与加热方式 3 2.1.2 温度传感器安装 3 2.1.3 控制单元的确定 3 2.1.4 驱动电路 3 2.1.5 控制方式的选择 3 2.2 输液保温器的设计思想 3 2.2.1 自顶向下设计 3 2.2.2 软硬件折衷设计 3 2.2.3 高性价比的设计 3 2.2.4 高可靠性设计 3 2.3 系统的总体结构与工作原理 3 2.3.1 输液保温器系统的总体结构 3 2.3.2 输液保温器的工作原理 3 2.3.3 系统的工作流程 3 2.4 系统可靠性分析 3 第三章 系统控制方式选择研究 3 3.1 控制系统的分类 3 3.2 不同控制系统的特点及应用 3 3.3 输液保温器的控制方式的确定 3 3.4 PID控制的原理、分类及参数整定 3 3.4.1 PID控制的原理 3 3.4.2