Application Research Of Low Power Consumption Passive Sensor Network Based On Combined Power Supply

With the development of Internet of things technology,wide-range and low-cost wireless sensor network has been used in urban environmental monitoring,industrial production detection,agricultural production parameter detection and other fields.However,in the actual application process,there are widespread problems such as the need for regular battery replacement and high maintenance cost for sensor nodes.The environment contains a wealth of energy,so it is of great practical significance and engineering value to study the collection of environmental energy to power wireless nodes This article from the modern facility agriculture(greenhouses)intelligent monitoring application scenarios,can put forward the solar energy,geothermal energy,temperature difference between wireless combination for sensor node power supply scheme,and the geothermal temperature difference can be collection,wireless transmission and power supply circuit design and energy collection effectiveness evaluation etc.In the work,the main work is as follows(1)Based on the basis of analyzing the characteristics of agricultural intelligent monitoring wireless sensor network,the power consumption demand of relevant sensor nodes is analyzed in detail,and the idea of combining solar energy with geothermal temperature difference energy and wireless energy is put forward.(2)Designed the geothermal temperature difference energy collection circuit,evaluation circuit and communication circuit,and designed experimental samples according to the application scenario,collected geothermal temperature difference energy data for nearly half a year,analyzed the geothermal temperature difference energy collection under the day and night temperature change,and laid a foundation for geothermal temperature difference energy to supply power to the sensing node;(3)The wireless energy transmission system is designed,the relationship between the wireless transmission power,transmission distance and energy receiving power is discussed,and a wireless energy receiving antenna is designed,which is easy to be conformal.The experiment verifies the feasibility of wireless energy transmission to supply power to the sensor node.(4)Intelligent management combined power supply circuit is designed,including energy collection circuit,power management circuit and energy assessment circuit,and a combined power supply scheme is proposed;(5)The experimental platform of low-power wireless transceiver node based on combined energy supply is built,and the wireless node transmits 433MHz signal to communicate with the relay node.In conclusion,this paper puts forward to solar energy,temperature difference energy,and the combination of wireless energy transmission power solutions explored the geothermal temperature difference can collect,design the intelligent power management circuits,built the evaluation system,solved such as the field of wireless passive sensor network problems such as battery replacement,maintenance difficulties,for the engineering application of passive node provides a technical path can be used for reference.