Self-Powered Research And Application Based On Rotating Hybrid Nanogenerator

As the world faces more and more serious environmental problems,wireless sensor network systems relying on battery power have encountered huge development bottlenecks.The deep integration of low-power devices and energy harvesting is becoming one of the key paths to solve the above problems.As a kind of energy widely existing in nature,fluid energy can drive wireless systems in the background of energy harvesting.For the traditional rotating hybrid nanogenerator,the electrode contact method is sliding friction,which causes more mechanical energy loss.This thesis designs an electromagnetic-triboelectric hybrid nanogenerator based on rolling friction.Based on the experimental results of the output characteristics,two power management circuits are designed to build a channel for practicability.A load system matching the output power is developed,which verifies the practicability of the rotating hybrid nanogenerator.The main work of this thesis includes:1.The structure of hybrid nanogenerator is designed based on the working principle.In this thesis,the basic theories of electromagnetic power and triboelectrification are explained separately,and Comsol is used to simulate triboelectrification unit.According to the characteristics of fluid energy,a hybrid nanogenerator based on rolling friction is designed.2.A prototype of the hybrid nanogenerator is fabricated to test the output characteristics.By comparing the electrode surface temperature under the two friction forms,it is verified that the electrode with roller friction has lower mechanical energy loss.A test platform is built to test the output characteristics of the hybrid nanogenerator,and an LED driving experiment is designed.It successfully ignited 150 LEDs at a speed of600r/min,which is far better than an energy harvester using a single power generation unit.3.The power management circuit of the hybrid nanogenerator is designed.The power management circuit scheme,rectifier circuit and device selection are compared and selected.The storage and release cycle circuit and output circuit are designed for the two power generation units,and the working stages are explained through schematic diagrams.Both power management circuits can achieve 3.3V power supply requirements.4.The wireless temperature measurement system for environmental monitoring is designed and verified for the practicality of the hybrid nanogenerator.The hardware part,low-power sending part and display part of the load system have been developed.In the laboratory environment,the natural wind conditions are simulated,and the self-powered driving experiment of the hybrid nanogenerator is completed.In this thesis,an innovative electrode contact method is designed for the rotating hybrid nanogenerator.The hybrid nanogenerator is made for output performance testing,and the power management circuit is designed.Finally,the practicality of the design is verified through experiments.