Research On Wave Energy Acquisition Technology Based On Swing Ship Type Triboelectric Nanogenerator

In order to achieve the purpose of intelligent ocean management,it is necessary to integrate various electronic systems such as marine equipment and sensors for marine meteorological monitoring,signal transmission and navigation.The increase of electronic systems has greatly increased the demand for energy.Battery power supply is often used in traditional energy supply mode.However,battery power supply suffers from issues such as high cost and poor continuity,which make marine monitoring sensors face great challenges of unsustainable power supply.For new energy generation,compared with wind energy and solar energy,wave energy has the advantages of low environmental impact and high energy density,and is one of the most promising marine renewable resources for new energy generation.The traditional wave energy power generation technology has the disadvantages of heavy structure and low conversion efficiency,and most of them can only be transmitted to large-scale power grid,which is difficult to directly supply power to marine equipment.Therefore,exploring new wave energy power generation technology for marine equipment and sensor power supply has become an important problem to be solved in the process of ocean development.The triboelectric nanogenerator(TENG)is a completely new energy technology based on Maxwell displacement current principle,which converts chaotic mechanical energy into electrical energy.Compared with electromagnetic power generation,it is more advantageous to collect low frequency energy.Therefore,TENG is an excellent choice for collecting low frequency irregular wave energy.In this paper,a swing ship type triboelectric nanogenerator(ST-TENG)is designed to collect wave energy stably for a long time.The main research contents and conclusions are as follows:(1)A swing ship type structure is designed by combining two working modes:independent layer and contact separation.The two working principles involved in ST-TENG are illustrated through structural and theoretical analysis,and the ST-TENG in the two modes are analyzed in electrical theoretical simulation,which studies the specific distribution of potentials in different moving positions and verifies the feasibility of ST-TENG.(2)For further experimental analysis,the experimental equipment and materials required for making ST-TENG are introduced.The designed ship type apparatus was printed by 3D printer,assembled with a series of friction materials acquired through tailoring and bonding methods,and finally an experimental research system of ST-TENG generation characteristics based on linear motors was established to explore the effect of different factors on the electrical property of ST-TENG.(3)The experimental results show that,for the internal structural parameters,the output performance of PTFE film as friction material is significantly improved compared with FEP film under the same thickness.After pasting Al film on the surface of nylon roller,the output performance is improved.and the output performance of solid roller is better than that of hollow roller.After adding foam tape,the open-circuit voltage and transfer charge increase greatly,but have little effect on short-circuit current.For external conditions,1.5Hz is closest to the resonant frequency of the device,at which time the output is the highest,but the signal is unstable.With the increasing amplitude,the open-circuit voltage and transfer charge increase continuously,while the short-circuit current increases first and then remains unchanged.(4)In order to better explore the ST-TENG performance and practicality,the loading characteristics,charge characteristics as well as stability of ST-TENG were investigated.The results show that TENG in the two modes of contact separation and independent layer achieves large output power under the best matching load.ST-TENG can charge different capacitors to a certain voltage in a short time and maintain the normal operation of electronic watches.Finally,it is verified that the device is stable enough to collect low-frequency wave energy for a long time.