The Research Of Intelligent Irrigation System Based On Fuzzy Control

As the development of our country and the population growth,water resources shortage is increasingly obvious.As a large agricultural country, agricultural water use accounts for a high proportion of the total water consumption. According to statistics,In2007, agricultural water accounted for more than60%of total water consumption.But every year there are nearly one hundred million mu of farmland do not have enough water for irrigation.Every year our country is short of40billion cubic meters of water.Intelligent irrigation fundamentally change the traditional irrigation mode. By automated equipment, we can improve the utilization rate of water so as to achieve the purpose of high yield, high efficiency and water saving. Intelligent irrigation has become the route one must take to realize agriculture sustainable development in china.In this paper, cucumber as an example to research the application of fuzzy control in the intelligent irrigation system,so that cucumber can to maintain the optimum soil humidity range in the different growth stages.Aiming at the actual demand of the intelligent irrigation system,this paper discusses the advantages and disadvantages of different strategy. According to the greenhouse environment,the paper established the fuzzy control strategy with Soil humidity deviation and its rate of change as the input variable. The system includes a large number of sensor nodes which are randomly distributed in the greenhouse and a base station which is responsible for receiving information and decision making.The base station comprises a microprocessor module, human-computer interaction module, wireless communication module, relay module and power supply module. The base station comprises a microprocessor module, human-computer interaction module, wireless transceiver module, relay module and power supply module. The human-computer interaction module mainly sets the cucumber growth cycle.The wireless communication module transfers the data-collecting instuction to the node and receives the soil moisture data from the node at a certain time. Based on the real time soil moisture and the optimal soil moisture of this period,the base stasion continuously reasons the irrigation time. The relay module control valve to complete the irrigation task. Through adjusting the irrigation time continuously this system can irrigate the crops with quality and quantity and achieve the purpose of saving water irrigation.Each node consists of soil moisture sensor, microprocessor and wireless transceiver modules. Node uses sensors to collect soil moisture and through wireless communication module in communication with the base station, accepting the collection instruction and sending real-time soil moisture to the base station. Through laboratory test and Simulink simulation to determine the feasibility of the system.Aiming at the optimum soil moisture of cucumber in the different growth period, this paper design a intelligent irrigation system based on fuzzy control. Combinating the wireless sensor technology and fuzzy control theory, the system can keep soil moisture of crops in the optimum range, improve crop yield and quality, and improve the utilization rate of soil water and achieve the purpose of saving water.