发布时间：2014-10-20 来源：人大经济论坛

目录 摘 要II AbstractIII 1 前言1 1.1 选题的背景与意义1 1.2 温室测控技术的发展状况和趋势1 2 系统的研究与设计2 2.1 研究内容2 2.2 总体方案2 2.3 硬件系统设计2 2.4 温湿度采样系统4 2.5系统仿真5 2.5.1系统仿真图5 2.5.2 主要组件简介5 3 软件系统设计7 3.1 系统初始化模块7 3.2 键盘显示模块8 3.3 数据采集模块9 3.4 温湿度控制模块10 3.5 报警模块10 4 系统调试方案11 4.1 系统电路的调试11 4.2 功能模块的调试方案11 5总 结12 致 谢13 参考文献14 附录15 摘 要 随着现代工业生产与电子技术的联系越来越紧密，温、湿度测量在各个行业和领域中得到了广泛运用，实施对温、湿度的实时监控，对保证生产安全因素，提高劳动效率，改善生产环境有很重大的应用价值。 对于温室的监测系统，温湿度环境条件是重要的。本课题针对温室大棚内温、湿度实时测量进行设计。采用DHT90专用芯片作为温、湿度传感器，通过其内部信号处理与模数转换，将输出数据送入AT89C52单片机进行数据处理与显示。论文分析了DHT90的工作原理，设计了完善的温、湿度实时测量系统。硬件设计采用Proteus 7 Professional工具，软件设计采用Keil uVision2版本c语言编程。 系统设计完成后，功能稳定可靠，且具有声音与发光管报警、时钟显示等扩展功能。 关键字 温度测量；湿度测量；预值报警；时钟显示 Abstract With the modern industrial production and electronic technology becoming closer than ever before, temperature measuring and humidity measuring have been widely used in many industry applications. Monitoring temperature and humidity can help to ensure the safety of work house, enhance labor efficiency and also has a great practical value in improving the producing environment. Monitoring system for the Greenhouse storage, environmental conditions of the temperature and humidity is important. The design was mainly for the measuring of temperature and humidity inside the Greenhouse. DHT90 was chosen as a temperature and humidity sensor. After series of internal signal processing and analog-to-digital conversion, digital DATA were sent into AT89C52 single-chip microcomputer for the calculation and finally displayed on a monitor. This study analyzed the operational principle of DHT90, design the perfect system for measuring temperature and humidity in real-time. Took Proteus 7 Professional as a tool to design hardware, and utilized Keil uVision2 Version to design the software in the form of C language. When the design has been accomplished, system was able to perform stably and output reliable DATA, and had some extra functions like voice &LED alarm and time display. Keywords Temperature measuring；Humidity measuring；predefined warning gate；time display