| Intelligent sensors as the basic equipment guarantee of the Internet of Things,its technical level is directly related to the development and application popularity of the Internet of Things.In recent years,with the continuous development of microelectronic technology and material technology,the power consumption of intelligent sensor devices has been reduced,which has reached to the level of microwatt.The monitoring tasks of intelligent sensors are also diversified and complicated.At present,the main mode of power supply for intelligent terminal is batteries.Traditional battery supply mode has limited life and causes environmente pollution when abandoned,which greatly limits the working cycle and task carrying capacity of intelligent terminal.Therefore,in order to meet the energy supply demand of intelligent sensor equipment,a kind of power generation device which is easy to be miniaturized and can supply energy for a long time is urgently needed.The concept of Triboelectric Nanogenerator(TENG),which makes it possible for small devices to efficiently collect low-frequency mechanical energy in the environment.The traditional combined generation device composed of electromagnetic generator and triboelectric nanogenerator has gained great attention due to its great potential in broadband capture and flexibility and applicability in different application scenarios.But at present,Triboelectric-Electromagnetic Hybrid Generator is a new type of power generation device.For this hybrid generator,the finite element simulation method is not mature,and the basic properties such as its own power generation performance are not well understood,which seriously affects the practical research on the performance prediction and structure design of the Triboelectric-Electromagnetic Hybrid Generator.This paper aims to solve the problem of finite element simulation for the Triboelectric-Electromagnetic hybrid generator,and on this basis,to explore its power generation properties.In this paper,firstly,the domestic and foreign research status of triboelectric nanogenerator,small Faraday electromagnetic generator and hybrid generator are introduced in detail.The general structure of each type of generator is summarized,and their advantages and disadvantages as well as the scope of application are described.The difficulties and deficiencies in numerical simulation are pointed out.Secondly,the finite element numerical simulation method for magnetic field is described,including electromagnetic field theories,the basic idea and process of finite element method and the specific issues in two-dimensional situation.Thirdly,a simple and representative two-dimensional plate TENG is selected to study its power generation performance reflected by its numerical simulation,focusing on the size problem that caused the numerical simulation difficult.TENG’s properties of power generation is summarized to lay the foundation for the further researches.Then,the finite element simulation method of a cylindrical TENG with application value is explored,and its power generation performance is discussed.Under the condition of periodicity and symmetry,it solves the problem that the amount of calculation of finite element simulation is too large.Finally,a triboelectric-electromagnetic hybrid generator is designed and introduced,including its material selection,structure,geometric dimensions,etc.Based on the finite element simulation method and experience obtained before,the magnetic field,electric field and output performance of the triboelectric-electromagnetic hybrid generator are discussed in detail. |
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