基于单片机的温度巡检系统的设计.doc

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1、目录摘要·······························································································3ABSTRACT····························································································4第一章概述···················································································

2、····51.1课题的提出···············································································51.2温度概况················································································51.2.1温度检测仪表的现状……………………………………………………………61.3.1课题背景…………………………………………………………………………61.3.2选题意义……………………………………………………………

3、……………7第二章系统设计方案的研究·······························································82.1系统性能要求……………………………………………………………………82.2方案的比较分析…………………………………………………………………82.2.1测量部分…………………………………………………………………………82.2.2多机远程通信部分···································································8第三章系统的总体设计······

4、································································93.1框图……··········································································93.1.1总体框图··············································································93.1.2从机系统框图……………………………………………………………………113.2从机部分········

5、········································································113.2.1温度信号的获取与放大·····························································113.3.模数转换单元………………………………………………………………………123.3.1信号处理和显示…………………………………………………………………143.3.2声光报警部分……………………………………………………………………203.4通讯部分·············

6、···································································213.4.1电路设计…………………………………………………………………………213.4.2多机系统…………………………………………………………………………213.4.3主从式多机系统设计要点………………………………………………………213.4.4RS-485方式构成的多机通信原理……………………………………………233.5主控机部分………………………………………………………………………263.5.1电路设计…………………………………………

7、…………………………263.5.2所用器件介绍………………………………………………………………263.6电源部分………………………………………………………………………293.7多路开关的选择····································································29第四章软件部分··········································································314.1软件流程图…………………………