【摘 要】
：
In order to improve the utilization of water resources and satisfy the needs of intelligent irrigation management, an intelligent irrigation system combined
【机 构】
：
College of Electronic Engineering, South China Agricultural University, Guangzhou, 510642,China
【出 处】
：
The Sixth Asian Conference on Precision Agriculture (第六届亚洲精准
论文部分内容阅读
In order to improve the utilization of water resources and satisfy the needs of intelligent irrigation management, an intelligent irrigation system combined with wireless sensor network technology as the core in litchi orchard was designed.The system uses a CC2530 as wireless communication module, DHT22 air temperature and humidity sensors, GY-30 light intensity sensors, TDR-3 soil moisture sensors and peripheral circuit as a sensor module to collect environmental information and data such as temperature humidity, light and soil moisture content.To achieve a real-time monitoring of litchi orchard environment, it ensures the transmission of real-time and remote via wireless sensor networks, GPRS and the internet transmission.In the mean time, thresholds for soil moisture water content in the litchi orchard can be set on remote servers and websites, when the value of the soil moisture content exceeds the threshold, the servers or websites will automatically send the relevant commands to control the corresponding solenoid valve to realize two-way control.The maximum effective communication distance of the designed nodes reached 1205m in open field and 122m in litchi orchard.With a working cycle of 30 min, it is estimated that two lithium batteries with rated capacity of 3000 mA·h allows sensor nodes to operate for up to 500d and the solenoid valve control node can work more than 5 years.Experimental results show that the system is stable with the average network packet loss rate of 0.75%.It which can monitor the collection of information and control the solenoid valves accurately to achieve a two-way control system of intelligent water-saving irrigation in litchi orchard.
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