Design On Acquisition Control System Of Intelligent Hydropower Based On Agricultural Well

China is a traditional agricultural country,its water resources per capita is relatively small,agricultural irrigation as a major water user accounts for about 70%of the total annual water consumption.At this stage,the information construction of agricultural irrigation wells lacks uniform standards,the degree of intelligence is low,the conversion of water and electricity costs and the automation of water metering are poor.In many areas,only the electricity bills generated during the irrigation process do not include the water fee,which results in wastage and theft of water for agricultural irrigation,it’s not conducive to the conservation and protection of agricultural water resources to a large extent.In order to meet the needs of water withdrawal management and measurement fees,the construction of farmland water conservancy ancillary works and water supply measurement facilities will be improved,the agricultural irrigation water measurement and collection system shall be used as a carrier to install and deploy intelligent water-saving control equipment,use Internet + IoT sensor technology to build agricultural water comprehensive reform of the cloud service management system to achieve provincial,municipal,county,township,village,water user information management of agricultural water use is imperative.Therefore,it is of great significance to design an intelligent hydropower dual control system based on agricultural irrigation wells.In this paper,the technical research and design of intelligent hydropower dual control system based on agricultural irrigation wells are carried out.Through the analysis of system functional requirements,the entire intelligent hydropower dual control system is designed as a four-level distributed partial closed-loop structure,which is the control management layer,the information acquisition layer,the charge management layer and the control execution layer,guarantee the reliability of the system.The STM32F103VET6 chip was selected as the control core of the control management layer to ensure that the system has multi-task processing capabilities,in addition,to further enhance the real-time and stability of the control system for multitasking,the μC/OS-Ⅱ operating system was migrated and operated.The long-distance communication function of the Internet of things selects GPRS module and NB-IOT module,realizes the long-range data transmission of the system through Internet of Things technology and the remote control of the system to the server.The information collection layer adopts electromagnetic flowmeters and electronic energy meters with stable communication and high measurement accuracy to measure the amount of water and electricity used.The charge management layer adopts non-contact M1 card to implement charge management for water fee and electricity fee for user’s management convenience and use convenience,so as to achieve "one card dual control" and "hydropower dual control".The control execution layer adopts the PLC and the intermediate relay to realize the control of the water pump irrigation,in addition,the PLC feedback instruction is used to implement the condition monitoring of the execution part to ensure the reliability of the control.The analysis of the system experimental data shows that the user’s credit card success rate is 100%;the water metering grade can reach 0.5,the repeatability error is less than 0.2%;the equipment network reporting data success rate is 100%;the equipment electronic meter calibration accuracy level reaches Level 1.0;the equipment are stable and reliable.