Design Of The Self-rebound Hybird Scavenger Based On Human Foot Movement

Human energy harvesting technology is regarded as a human energy reuse method,it firstly put the other forms of energy into electricity.then store the electricity in a capacitor in the course of human movement.and then transmitting it to sensor nodes and other micro-power wearable electronic devices.Continuous supply of energy.This technology has a merit of environmentally friendly,strong repeatability,and put for use extensively,Which has put into use extensively form the aspect of the Web,Micropower transducer and smart wearable fields.As the medium of energy harvesting technology,the human energy harvesting device is the key to achieving energy conversion.The current human energy harvesting devices have shortcomings such as single energy conversion form,low output power and low energy conversion efficiency.Therefore,exploring a composite human body energy harvester that is highly integrated with textiles,can integrate multiple energy conversion principles and avoid mechanical connections,and improve energy collection efficiency and output power has always been a research hotpot in this field.Based on this,this paper designs a self-rebound composite energy harvester for human foot movement,and establishes a self-rebound kinematics model,aiming at studying the mutual coupling mechanism,design and manufacture of each transducer unit,dielectric material forming process conditions,test the performance of the hybird nanogenerator output.This objective is to harvest energy for human movement,and conduct research on the energy supply of wearable devices to provide a certain feasible basis for the manufacture of portable self-powered textiles.The specific research content of this paper is as follows:(1)A theoretical model of electromechanical coupling about clamped beam which made of piezoelectric material under the conditions of flexible and large-deformation loading is established.The device model is established in a multiphysics simulation platform to simulate its movement process when it is excited by a load,and the influence of external environment vibration,the structure size and the material properties of the piezoelectric nanogenerator,and other conditions on the open circuit voltage of the generator are studied.based on the above conclusion,we demonstrated a clamped,flexible based PENG fabricated by acrylic materials.The result showed that the output voltage of the simulation and experiment was consistent,the validity of the flexible piezoelectric human energy harvester model was proved.(2)A novel method is proposed to obtain the dielectric layer by applying microstructural carbon nanotubes(CNT)/polydimethylsiloxane(PDMS)elastomer membrane Triboelectric Nanogenerators.Carbon nanotubes are doped in polydimethylsiloxane to increase the dielectric constant in order to improve TENG output,and realize the preparation of microstructured CNT/PDMS dielectric layer TENG under new process conditions.The experiments are conducted to investigate the effect of the mesh of sandpaper template,CNT Quality score,and the effect of load on the output performance of the Triboelectric Nanogenerators.In addition,we measure the output power and durability of the generator,the test obtained the maximum output power density of the Nanogenerator conditions and optimal preparation process conditions.(3)First,we put forward the theory of self-rebound of electromagnetic Nanogenerator,then we studied the regularity of elastic force when the two magnets repel,and the mechanism of the reciprocating motion of the device is clarified.Second,we simulated the magnet pressing-rebound process in the multi-physics simulation platform,The purpose of the simulation is to show the influence of the three factors: magnet movement frequency,the number of copper coil turns and whether the coil completely covers the magnet,which influence the induced voltage.Third,we made a prototype of the electromagnetic Nanogenerator,we demonstrated that EMG shows immunity against humidity and excellent durability against mechanical friction.Moreover,since it can be fabricated into a small size with a large power density,the TENG is applicable as an energy supplier for portable electronics and as an energy harvester for self-powered systems.(4)Using the method of coupling three generator action modes reciprocally to design and manufacture self-rebound hybird Nanogenerator based on human foot movement.Test generator’s open-circuit voltage,short-circuit current,and electric power by building a test system.we designed an energy harvesting circuit,using a generator to charge the circuit Subsequently,the charged generator can light up 80 parallel LED lights and self-powered sports shoes can provide stable power for low-power pedometers after a human has walked for a certain distance.The results show that the self-rebound hybird Nanogenerator based on human foot movement designed by our-self has certain application value in human wearable devices.In addition,109 figures,1 tables,70 1references are included in this paper.