温室中光照度的实时检测和自动控制系统方案.doc

word完美格式 PAGE 精心整理 学习帮手 2015届毕业生 毕业论文 题 目: 温室中光照度的实时检测及自动控制系统 院系名称： 电气工程学院 专业班级： 电气F1101 学生姓名： 学 号： 指导教师： 教师职称： 讲师 年 月 日 摘 要 温室大棚技术是近年来逐步发展起来的一种资源节约型高效设施农业技术，在现代农业生产中已得到广泛的应用，对现代农业生产具有重要的作用。它突破了传统农业种植受地域、季节、气候、自然环境等因素的限制，为农作物提供了适宜的生长环境。而光照作为植物生长的三大要素之一，是农作物制造养分的必要条件，也是形成温室小气候的主导因素。因此，使用光照度计对温室大棚里的光照度进行测量是十分重要的。 针对这一问题，本论文采用PWM调光技术，完成了温室中光照度的实时检测及控制系统的硬件电路和软件程序的设计，并用Proteus软件进行了模拟仿真，并做出了实物模型。通过对本设计系统进行检测，测试结果表明，该系统运行稳定，测量精度高，不仅实现了温室大棚中光照度的测量的需求，还能对温室内光照进行有效的监控。 关键词：温室 光照度检测 光照度控制 STC89C52 PWM Title The illuminance of the real-time detection and automatic Control system in greenhouse Abstract Greenhouses technology is a kind of resource saving efficient facilities agriculture technology developed gradually in recent years, which has been widely used in modern agricultural production and plays an important role in modern agricultural production. It breaks through the limit of traditional farming in region, season, climate, natural environment and so on, and provides the appropriate growth environment for crops. Lighting as one of three main factors for plant growth, is the necessary condition for crops to produce food, and is the dominant factor of formation of greenhouse microclimate. Therefore, the use of light meter to measure the light in the greenhouses is very important. In order to solve this problem，this paper completed the design of the hardware circuit and software program about the light real-time detection and control system in greenhouse by adopting the PWM dimming technology, had run the simulation with Proteus, and made a physical model. By testing this system, the test results show that the system runs stably and high measuring accuracy. It not only has realized the requirements of measuring light in greenhouses, but also can process the effective monitoring of light