Research On Photovoltaic Power Supply Technology Of WSN Node Based On Meteorological Features Oriented Northern Guangxi

Wireless Sensor Network technology is widely used in many fields such as military monitoring,environmental detection,agricultural monitoring and industrial production,and has broad application prospects.However,due to the limited service life of the node-powered battery,the traditional wireless sensor network leads to a short working life of the node,which has become one of the important factors restricting the popularization and application of the wireless sensor network technology.Therefore,how to make the Wireless Sensor Network node self-sufficient and long-term sustainable work is a current research hotspot.The rapid development of new energy industry for photovoltaic cells has made it possible to reliably supply power to wireless sensor network nodes.In this paper,the climate in the north of Guangxi is the work area of wireless sensor network nodes,and the node self-power supply technology of wireless sensor networks is studied.This paper focuses on three aspects of research and analysis,which are the deployment angle of the node photovoltaic panel,the maximum power point tracking algorithm and energy management method.Firstly,this paper studies the global energy status,energy background,and the distribution of solar energy in the North of Guangxi were studied,the feasibility of the Wireless Sensor Network node photovoltaic self-powered technology in the northern Guangxi was analyzed,and the current research status of node self-power supply was analyzed;Then the photovoltaic cell equivalent model was built,analyzing the output characteristics of photovoltaic cells.And then the azimuth and tilt angles of the photovoltaic cells were analyzed to obtain the best deployment angle.Combining with the meteorological characteristics of the northern Guangxi,the photovoltaic cells,energy storage devices,and control chips in the node’s self-power supply system are analyzed and selected so that the hardware meets the requirements of the node’s self-powered system for low power consumption and long working life.For photovoltaic cells as energy sources for node self-powered systems,their output power is greatly affected by the external environment.In this paper,the current observation algorithm is improved,and circuit design based on current observing algorithm is performed,through traditional current observing algorithms.Comparing the simulation,we can see that the improved circuit design can improve the power output of the photovoltaic cell.At the same time,the energy stored in the energy storage device for the node self-powered system is a limited issue.According to the selection and characteristics of the photovoltaic cell,super capacitor and lithium battery,a reasonable energy management circuit and upper computer software are designed.On-line monitoring of the energy status of each node in the wireless sensor network,the experimental results show that it can effectively improve its energy efficiency.Through the analysis of the data obtained from the experiment,the designed wireless sensor node photovoltaic power supply system can meet the actual application requirements and meet the performance requirements of node photovoltaic self-power supply in the northern Guangxi.