节水灌溉自动控制系统的研究

Automatic monitor and control system of water saving irrigation

为了节约植物灌溉用水,提高水资源使用效率,该文采用单片机、传感器、RS-485网络、无线通讯以及变量控制等技术,设计了一套闭环控制的精准灌溉控制系统。该系统由中央监控计算机、灌溉监测控制器、土壤水分传感器和阀门控制器组成。其中,底层传感器和阀门控制器通过RS-485总线连接至灌溉监测控制器,灌溉监测控制器通过无线通讯模块与中央监控计算机相连。该系统实现了土壤含水率的在线自动监测,并依据植物的土壤含水率灌溉阈值自动控制灌溉系统。试验表明,该系统可以达到精准灌溉的要求,结合植物的土壤含水率生存阈值和最大生物量阈值可实现节水灌溉。

The objective of this study is to use advanced electronic computer control and wireless transmission technology to design a precision irrigation control system. It includes computer,soil moisture sensor, irrigation monitor and valve controller. Sensors and valve controllers are connected to irrigation monitor by RS-485 bus. And irrigation monitor is connected to computer by wireless transmission module. This system based on real-time measuring soil moisture content is able to apply water according to soil water content limit for irrig experiment results in field show that the system has the ability to save water in case of getting the content depending on plant survive limits.