基于单片机的大棚温湿度检测系统 毕业设计（论文）.doc

基于单片机的大棚温湿度检测报警系统 摘 要 系统是一个专门为温室大棚温湿度控制而设计的智能系统。通过对系统的硬件部分和软件部分设计来达到监控要求。硬件部分实现了对温湿度传感器模块、A/D转换模块、显示模块、控制模块的设计；软件部分主要根据系统的设计思想设计出了主程序和子程序流程图，并通过汇编语言和C语言实现。通过实践证明，系统具有性能好、操作方便等优点，实现了对温湿度的显示、调节、自动控制和手动控制。 关键词： A/D转换；传感器；LED ABSTRACT The?work?of?this?dissertation?is?about an intelligent system designed for controlling the temperature and humidity of a greenhouse. It can meet the demand of monitoring through the design of hardware and that of software in details, The former is more important in this dissertation, including the introduction of sensor of measuring temperature and humidity, changing of A/D, demonstrating mode of data, the mode of control and the connecting part of the changing column. And according to the design thoughts the latter shows the flow chart of the main program and the subprogram, realized by assembly language and C language. The system adopts quite a new integrated circuit, which makes it function better and run more conveniently when put into practice. Furthermore, not only can it achieve the goals of manifesting and regulating the temperature. But also it?can?be controlled automatically and manually. Key words： changing of A/D ; sensor ; LED 目 录 TOC \o 1-3 \h \z \u HYPERLINK \l _Toc2631057131 绪论 PAGEREF _Toc263105713 \h 1 HYPERLINK \l _Toc2631057141.1课题背景 PAGEREF _Toc263105714 \h 1 HYPERLINK \l _Toc2631057151.2预期目标 PAGEREF _Toc263105715 \h 1 HYPERLINK \l _Toc2631057162 系统总体设计方案及工作原理 PAGEREF _Toc263105716 \h 2 HYPERLINK \l _Toc2631057172.1系统总体设计方案简述 PAGEREF _Toc263105717 \h 2 HYPERLINK \l _Toc2631057182.1.1基本功能 PAGEREF _Toc263105718 \h 2 HYPERLINK \l _Toc2631057192.1.2主要技术参数 PAGEREF _Toc263105719 \h 2 HYPERLINK \l _Toc2631057202.2系统的工作原理 PAGEREF _Toc263105720 \h 2 HYPERLINK \l _Toc2631057213 系统的硬件设计 PAGEREF _Toc263105721 \h 4 HYPERLINK \l _Toc2631057223.1 单片机的确定 PAGEREF _Toc263105722 \h 4 HYPERLINK \l _Toc2631057233.2传感器的确定 PAGEREF _Toc263105723 \h 7 HYPERLINK \l _Toc2631057243.2.1温度传感器 PAGEREF _Toc