基于模糊控制的温室灌溉控制系统的研究

Study on Greenhouse's Irrigation Control System Based on the Fuzzy-control Theory

针对温室灌溉受多因素影响难以建立精确控制模型的特点,开发了基于LabVIEW平台的温室节水灌溉模糊控制系统。该系统由土壤湿度传感器、数据采集卡、LabVIEW软件平台等组成,以土壤湿度偏差以及偏差变化率为输入量,以灌溉时间长度为输出量,采用MATLAB Fuzzy Logic工具箱设计模糊控制器,实现了温室灌溉需水量的模糊决策系统。试验结果表明,该系统能够根据土壤水分适时、适量的灌溉,对节水灌溉技术的发展起到了一定的作用。

Greenhouse irrigation is affected by multiple factors, and it is difficult to develop a precision control model, a fuzzy control system of greenhouse water - saving irrigation was established by using LabVIEW platform. The system consists of soil humidity sensors, date logger board and LabVIEW software. The deviation of the soil water humidity and the change rate of its were taken as input variables, the time of irrigation was used as output, and the fuzzy logic control toolkit was adopted to design fuzzy controller and establish the fuzzy decision system of the water requirement in greenhouse irrigation. The results show that the system can realize irrigation properly and timely based on soil humidity, and it has played a certain action for the development of water saving irrigation technology.