Research On Environment Control For Greenhouse Based On Fuzzy Control

In recent years, with popularization of the Yangling Demonstration Zone ofmodern greenhouse cultivation technology,the farmers growing enthusiasm risinggreatly and the greenhouse area increases rapidly, Meanwhile the greenhouseenvironment monitoring device of parameters still manual-based.Leading to hard labor,ineffective.Greenhouse environmental parameters detected mainly in temperature, humidity,CO2concentration and light intensity. The quality and yield increment of garden stuffare determined by these four aspects.Therefore,aim at the problem of greenhouses forfarmers, research and development a fully function,low-cost automatic monitoringsystem is very necessary.After referring to many relative documents,this thesis provides a designingscheme of the environment parameters control system based on fuzzy controlling ofthe single chip microcontroller, combined with digital temperature and humiditysensor, light sensor, CO2concentration sensor, the display module and executingagencies to complete the hardware design, it implements multiple data real-timecollection, processing, display, set the parameter modification functions.Software part adopt modular design, using the microcontroller C language andfuzzy control algorithms to detection and process information of the environmentparameters,such as temperature,humidity, CO2concentration, light intensity and otherparameters related.Output control signals to the heating,ventilation, fill-in light,irrigation and other implementing agencies to adjust the greenhouse environmentautomatically.According to the actual situation of greenhouses in Yangling District, a certainproportion of the miniature greenhouse is designed and produced,then put this designcontrollers and actuators installed in the mini-greenhouse, tested system performance,using the tomato seedling growth process to complete comparison test, the resultsshowed that the device measurement works accuracy, practicality.It can promotegrowth control of the garden stuff in greenhouse.so it has a certain application valueand popularity value.