球形永磁阵列振动能量采集器的设计与优化
发布时间：2018-12-11 20:00
【摘要】：微机电系统及传统无线传感节点的供能主要依靠化学电池,而化学电池存在体积大、寿命短、更换频繁等诸多缺点,采用新型能量采集系统为之供电是未来必然趋势。振动在自然界中广泛存在,其具有能量密度大、清洁环保、工作稳定及易于微型化等优点,振动能量采集受到极大关注。但目前大部分振动能量采集器只考虑单一方向,因此,本文提出一种具有多方向振动能量采集功能的球形永磁阵列能量采集器。论文首先对国内外振动能量采集技术研究现状进行了归纳分析,然后设计了一种球形振动能量采集器,其目的在于利用球体的空间对称性来有效收集环境中各个方向的振动能。之后,建立了相应的物理模型并对其动力学特性进行了分析,针对换能结构设计了一种球面Halbach永磁阵列,对其磁路进行了理论分析。根据得出的解析结果对模型中的各个参数进行了优化设计。在此基础上,再利用Ansoft Maxwell软件对该模型进行有限元仿真分析,将仿真结果与理论分析结果进行了相互验证比较。最后针对换能结构设计了一种正十二面体永磁阵列,并对其进行了仿真分析。绘制了工程图纸、加工了实验样机,并搭建了一个多方向振动能收集的性能测试平台。实验结果表明,该样机能够响应环境中任意方向的振动,从而得出输出电能。当外部激励频率为10Hz、激励方向为水平方向、负载阻值为50Ω时,该球形振动能量采集器的输出电能达到最大,单个线圈中最大的负载功率可达到0.8mW。研究表明,该球形振动能量采集器对多方向环境振动具有较好的适应性,本文研究成果对后续的多方向振动能量采集研究具有一定指导意义。
[Abstract]:The energy supply of MEMS and traditional wireless sensor nodes mainly depends on chemical battery, which has many disadvantages, such as large volume, short life, frequent replacement and so on. It is an inevitable trend in the future to use a new energy acquisition system to supply power. Vibration exists widely in nature. It has the advantages of high energy density, clean and environmental protection, stable work and easy miniaturization. However, at present, most vibration energy collectors only consider a single direction. Therefore, a spherical permanent magnet array energy collector with multi-direction vibration energy acquisition function is proposed in this paper. In this paper, the research status of vibration energy acquisition technology at home and abroad is summarized and analyzed, and then a spherical vibration energy collector is designed, which aims to collect vibration energy in every direction of the environment by using the space symmetry of the sphere. Then, the corresponding physical model is established and its dynamic characteristics are analyzed. A spherical Halbach permanent magnet array is designed for the energy transfer structure, and its magnetic circuit is theoretically analyzed. According to the analytical results, the parameters in the model are optimized. On this basis, the finite element simulation analysis of the model is carried out by using Ansoft Maxwell software, and the simulation results are compared with the theoretical analysis results. Finally, a normal dodecahedral permanent magnet array is designed and simulated. The engineering drawings are drawn, the experimental prototype is machined, and a multi-directional vibration energy collection performance test platform is built. The experimental results show that the prototype can respond to the vibration in any direction in the environment, thus the output electric energy can be obtained. When the external excitation frequency is 10 Hz, the excitation direction is horizontal and the load resistance is 50 惟, the output power of the spherical vibration energy collector reaches the maximum, and the maximum load power in a single coil can reach 0.8 MW. The research shows that the spherical vibration energy collector has a good adaptability to the multi-directional environment vibration, and the research results in this paper have a certain guiding significance for the subsequent multi-direction vibration energy acquisition research.
【学位授予单位】：南京航空航天大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM619
，
本文编号：2373137
[Abstract]:The energy supply of MEMS and traditional wireless sensor nodes mainly depends on chemical battery, which has many disadvantages, such as large volume, short life, frequent replacement and so on. It is an inevitable trend in the future to use a new energy acquisition system to supply power. Vibration exists widely in nature. It has the advantages of high energy density, clean and environmental protection, stable work and easy miniaturization. However, at present, most vibration energy collectors only consider a single direction. Therefore, a spherical permanent magnet array energy collector with multi-direction vibration energy acquisition function is proposed in this paper. In this paper, the research status of vibration energy acquisition technology at home and abroad is summarized and analyzed, and then a spherical vibration energy collector is designed, which aims to collect vibration energy in every direction of the environment by using the space symmetry of the sphere. Then, the corresponding physical model is established and its dynamic characteristics are analyzed. A spherical Halbach permanent magnet array is designed for the energy transfer structure, and its magnetic circuit is theoretically analyzed. According to the analytical results, the parameters in the model are optimized. On this basis, the finite element simulation analysis of the model is carried out by using Ansoft Maxwell software, and the simulation results are compared with the theoretical analysis results. Finally, a normal dodecahedral permanent magnet array is designed and simulated. The engineering drawings are drawn, the experimental prototype is machined, and a multi-directional vibration energy collection performance test platform is built. The experimental results show that the prototype can respond to the vibration in any direction in the environment, thus the output electric energy can be obtained. When the external excitation frequency is 10 Hz, the excitation direction is horizontal and the load resistance is 50 惟, the output power of the spherical vibration energy collector reaches the maximum, and the maximum load power in a single coil can reach 0.8 MW. The research shows that the spherical vibration energy collector has a good adaptability to the multi-directional environment vibration, and the research results in this paper have a certain guiding significance for the subsequent multi-direction vibration energy acquisition research.
【学位授予单位】：南京航空航天大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM619
，
本文编号：2373137
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