Real-time feedback control technology for precise furrow irrigation
WU Caili1,2*, XU Di1,2, BAI Meijian1,2, LI Yinong1,2
1. China Institute of Water Resources and Hydropower Research, Beijing 100048, China; 2. National Center of Efficient Irrigation Engineering and Technology Research, Beijing 100048, China
Abstract：A real-time feedback control system for precise furrow irrigation was constructed by taking gate time as a control variable in the paper. In the system, real-time data acquisition and transmission equipment for irrigation information served as the support conditions, computer processing system was the core foundation, and irrigation water flow control device was the application conditions. Among them, the real-time data acquisition and transmission equipment included the team self-developed water level detecting device and wireless receiving information management device. Especially, a few difficult problems, such as easily missed irrigation information test, short receiving distance and field power supply, were solved with IP addressing, relay jump of wireless communication module, circuit optimization and internet technology. Based on the real-time irrigation information, the computer processing system can estimate the soil property parameters and predict the irrigation process, but also decide the optimal control scheme according to an irrigation control target. Finally, the irrigation water flow control equipment was tested in field by controlling gate valve opening and closing in Beijing, Hebei and Xinjiang regions, etc. The results show that the precise real-time feedback control system proposed has very important theoretical and practical significance to strengthen the controllability of the furrow irrigation process, improve the irrigation efficiency of the irrigation, and promote the transition of irrigated agriculture from empirical extensive management to computer-controlled intensive management to realize the sustainable development.
