基于单片机的温度巡检系统的设计-大学毕业论文毕业设计学位论文范文模板参考资料.docVIP

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基于单片机的温度巡检系统的设计-大学毕业论文毕业设计学位论文范文模板参考资料.doc

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目录摘要·······························································································3 ABSTRACT····························································································4 第一章概述·······················································································5 1.1课题的提出···············································································5 1.2温度概况 ················································································5 1.2.1 温度检测仪表的现状……………………………………………………………6 1.3.1 课题背景…………………………………………………………………………6 1.3.2选题意义…………………………………………………………………………7 第二章系统设计方案的研究·······························································8 2.1 系统性能要求 ……………………………………………………………………8 2.2 方案的比较分析 …………………………………………………………………8 2.2.1测量部分…………………………………………………………………………8 2.2.2多机远程通信部分···································································8 第三章系统的总体设计······································································9 3.1框图 ……··········································································9 3.1.1总体框图··············································································9 3.1.2从机系统框图……………………………………………………………………11 3.2从机部分················································································11 3.2.1温度信号的获取与放大·····························································11 3.3.模数转换单元………………………………………………………………………12 3.3.1信号处理和显示…………………………………………………………………14 3.3.2声光报警部分……………………………………………………………………20 3.4通讯部分················································································21 3.4.1电路设计…………………………………………………………………………21 3.4.2多机系统…………………………………………………………………………21 3.4.3主从式多机系统设计要点………………………………………………………21 3.4.4 RS-485方式构成的多机通信原理……………………………………………23 3.5主控机部分 ………………………………………………………………………26 3.5.1 电路设计 ……………………………………………………………………26 3.5.2 所用器件介绍 ………………………………………………………………26 3.6 电源部分………………………………………………………………………29 3.7多路开关的选择················