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单片机气候参数监测系统设计【毕业论文+文献综述+开题报告】.doc

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( 2011 届 ) 毕业设计 题 目: 单片机气候参数监测系统设计 姓  名:          专  业:  电子信息工程 班  级:      SCM climate parameters monitoring system Abstract In the medical, power electronics, aerospace, food fermentation industry, on the environment temperature and humidity requirements are very strict. In this paper, based on existing research methods to design an environment to provide temperature, humidity and with temperature, humidity gauge alarm device, the use of microcontroller and external circuit to form a monitoring system. The system is AT80C51 microcontroller as the core, the use of DS18B20 as the temperature sensor, select HM1500 as humidity sensor. Hardware system includes temperature sensors, humidity sensors, the core controller, display and alarm devices, and several other parts, to achieve the indoor temperature and humidity in real-time detection and display device design. Provides detailed design, hardware schematics and program flow chart. The control system can achieve the following functions: energy on the environment temperature and humidity in real-time detection; detected by the temperature and humidity data can be displayed in real time; users can set their own monitoring upper and lower limits of temperature and humidity, limit alarm. Keywords: AT80C51 microcontroller, temperature sensor, humidity sensor, LED display device 目录 摘 要 III Abstract IV 1 绪论 1 1.1课题的来源 1 1.2课题的意义 1 1.3温室环境控制技术国内外发展现状 1 1.3.1国外温室环境控制技术的研究现状 1 1.3.2国内温室环境控制技术的研究现状 2 1.3.2温室环境控制技术的发展趋势 2 1.4主要设计内容 3 2 硬件系统设计 5 2.1概述 5 2.2主要元器件 5 2.2.1 AT80C51单片机 5 2.2.2 温度传感器 8 2.2.3湿度转换器 9 2.2.4 A/D转换器 10 2.3 时钟电路和复位电路 12 2.3.1 时钟电路 12 2.3.2 复位电路 12 2.4 温湿度测量电路 13 2.5 显示电路 15 2.6 报警电路 17 2.7 硬件系统原理图 18 3 软件系统设计 19 3.1 概述 19 3.2 数据处理模块 19 3.2.1 温度处理程序 19 3.2.2 湿度处理程序 24 3.3 显示模块 24 3.4 报警模块 25 结论 26 参考文献 27 致谢 28 附录 29 1 绪论 1.1课题的来源 目前我国农业正在从传统农业向以作为现代农业转型的新阶段目标的高品质,高产量,高效益发展。农业生物生长快,高品质,高产量的环境控制工程,是农业现代化的重要标志。温室环境由多个因素组成,如温度,湿度及二氧化碳浓度的因素等。现在,我们的温
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