Research On A Novel Boundary Detection Sensor Based On Superelastic Triboelectric Nanogenerators

With the rapid development of the Internet of Things and modern information and energy technologies,new flexible electronic products have shown great advantages and development potentials that can replace traditional electronic products in more and more fields such as healthcare,environmental monitoring,safety analysis,and big data collection.Nowadays China is vigorously promoting the development of intelligence in the sports field,and the global smart sports market is also in a period of rapid development.However,the current smart big data devices used in the sports field are mostly composed of a large number of multi-functional sensors,of which the most commonly used high The sensitivity detector is an eagle eye system composed of high-speed cameras,which has extremely high cost and maintenance costs.In addition,the system will affect the smoothness of the game,and is limited by the effects of light,simulation errors,etc.A feasible solution to this problem is to propose a high-precision,low-cost,stable and durable method in the field of boundary detection that can replace the traditional Hawkeye system,and further realize a sensing system that can be applied to detection and other fields.Triboelectric Nanogenerator(TENG),as a new type of green energy collection technology,can efficiently harvest mechanical energy and convert it into electrical energy,and this energy can be used in various fields such as self-powered sensors.Compared with traditional energy harvesting devices,triboelectric nanogenerators have the advantages of simple structure,wide selection of materials,and high output performance.They have extremely important development prospects and research significance in the fields of energy harvesting and intelligent sensing.Aiming at the judgment of the controversial boundary ball in tennis competitions and other sports events,a novel self-powered boundary detection sensing method based on hyperelastic material-based triboelectric nanogenerator(H-TENG)is proposed in this project,which has the advantages of low cost,high sensitivity,high accuracy,durability and stability.The main content of this article is as follows:(1)In this paper,Ecoflex 00-30 silicone rubber is used as the matrix,and carbon black(CB)and multi-wall carbon nanotubes(MWCNTS)are used as conductive fillers to prepare a composite material with both flexibility and conductivity.Besides,this composite is combined with Ecoflex 00-30/Dragon Skin 10 silicone rubber friction layer to prepare a hyperelastic material-based triboelectric nanogenerator,so that the entire device has a certain flexibility and stretchability.In terms of electrical output of the triboelectric nanogenerator,at a frequency of 3Hz,the output performance of Ecoflex00-30 and Dragon Skin 10 are equal.The open circuit voltage(V_oc)of the triboelectric nanogenerator(5×5cm²)can reach 1000V,and the short-circuit current(I_sc)reaches35?A,and different dielectric layer thicknesses(0.3mm-1.0mm)have no obvious influence on the output performance.In the experiment,dielectric layers with different surface microstructures were prepared by using 120 mesh sandpaper and 80 mesh sandpaper.The results show that the triboelectric nanogenerator can reach 1100V and1400V.The optimal load of the triboelectric nanogenerator is 10M?,and its peak power can reach 1.5W/m².Experiments show that the triboelectric nanogenerator can produce significant voltage output for different falling heights of tennis balls and has high sensitivity to small changes in the falling height.In addition,the triboelectric nanogenerator can be used to collect biomechanical energy from the human body and light up hundreds of LED lights of different colors at the same time.With its good flexibility and stretchability,the triboelectric nanogenerator can be restored to its original shape and maintain almost unchanged output performance after being subjected to 50%to 200%stretching for multiple times.(2)On the basis of the experiment,in order to explore the force and deformation of the triboelectric nanogenerator under the impact of a tennis ball,this paper prepared tensile specimens of Ecoflex 00-30,Dragon Skin 10 and Ecoflex 00-30/MWCNTs/CB composites.Through the uniaxial tensile experiment,the experimental data was imported into the optimization module of Comsol software for data fitting,and the simulation parameters of the Mooney-Rivlin hyperelastic model were obtained.On this basis,this paper uses Abaqus/Explicit software to establish a high-precision dynamic theoretical analysis model for tennis and H-TENG,and simulates tennis impact H-TENG by setting the angle and speed of the tennis impact.The force and deformation of the device at different times are analyzed to provide simulation support for the study of the collision theory of the silicone rubber superelastic model and the further study of the impact mechanism of the high elasticity and high flexibility of the triboelectric nanogenerator on the output performance.(3)In order to achieve the establishment of a multi-channel measurement and sensing system,in terms of hardware,this paper intends to divide the boundary of the stadium into multiple areas,each area is composed of an independent hyperelastic material-based triboelectric nanogenerator sensor,combined with National Instruments'USB-6009 data acquisition card,customized 4-input and output AD620 signal amplifier and XSMS-25-12 switching power supply form the hardware part of the system.In the software part,this paper uses Lab VIEW software to design the program block diagram of the multi-channel data acquisition system,and designs the front panel of the system accordingly to establish a graphical user interface,and successfully builds the system's user registration and login,data acquisition and Function module for saving and viewing historical data sets.By testing the system,the results show that the system can monitor the voltage output signal of the 4-channel sensor stably and sensitively in real time.