Preparation Of Dielectric Elastomer Power Generation Devices For Functional Knee Pads

With the continuous development of technology,the significance of green energy in human society is becoming increasingly significant.Dielectric elastomer generator(DEG),as a new type of energy conversion device,can convert kinetic energy into electrical energy through deformation.The working principle of a dielectric elastomer power generation device for functional knee pads is to utilize the bending displacement of the knee joint during human motion to stretch the dielectric elastomer,thereby achieving the conversion of kinetic energy to electrical energy.This article studies the structure and power generation performance of knee pads based on the original knee pads.The specific work is as follows:(1)The knee protection structure was optimized by adding an auxiliary spring device and a triple tension amplification device on top of the original knee protection.Mechanical simulation of the knee protection structure was conducted,and it was found that the auxiliary spring device can provide an elastic potential energy of 11.89 J in one motion cycle.It has also been confirmed in practice that the improved knee protection structure increases the stretching rate of the dielectric elastomer and human comfort.(2)In order to explore the basic properties of dielectric elastomers,a DE power generation unit was prepared and characterized using an automatic tensile testing platform for its mechanical properties,including tensile and bending resistance,as well as electrical properties,including dielectric field strength,resistance stability,capacitance,output voltage,charge loss rate,and output energy.(3)In order to prepare multi-layer dielectric elastomers and improve their performance,this paper proposes a new stamping process-"cold pressing hot pressing composite hot pressing" stamping process,multi-layer dielectric elastomer lamination treatment method and packaging treatment process.Ten layers of dielectric elastomers were prepared using this process and treatment method.(4)In order to demonstrate the optimization of the performance of multi-layer dielectric elastomers prepared by the new process,the power generation performance of ten layer dielectric elastomers,including capacitance,output voltage,charge loss rate,and output energy,was tested and characterized,and a comparative study was conducted with the electrical performance of single-layer dielectric elastomers.By comparison,it was found that during the process of increasing the input voltage from 300 V to 1200 V,the energy output of the ten layer dielectric elastomer prepared by the new process increased by16.03 times.During the process of increasing the stretching rate from 1.05 to 1.25,the energy output of the ten layer dielectric elastomer prepared by the new process increased by 11.31 times.