摘要
环境中的振动大都不是单一频率的振动,其频率成分分布在一个较宽的频带内.为了充分采集环境中的振动能量,实现无线传感器的自供电,要求振动能量采集器具有宽频振动采集性能.非线性振动法是目前研究最多的一种方法,利用非线性振动法可较容易地实现宽频振动能量采集,且能获得较好的能量采集性能.本文阐述了非线性宽频振动能量采集器的工作原理、机电耦合理论,根据不同的类型介绍了宽频振动能量采集器的最新研究进展,总结了不同类型的优缺点,并对非线性宽频振动能量采集器的发展趋势进行了展望.
Frequency of most ambient vibrations is not single, but varies within a broad frequency range. For supplying sufficient energy to the self-powered wireless sensors by harvesting ambient vibration energy, it is need that vibration energy harvesters have broadband acquisition performances. Currently nonlinear vibration methodes have been widely studied by researchers. It is easy to realize broadband vibration energy harvesting by using the nonlinear vibration method and the nonlinear broadband vibration energy harvesters have a better energy harvesting performances. In this paper, the working principles, the electromechanical coupling theories of the nonlinear broadband vibration energy harvesters are described, and the recent research progress is introduced by different types, with summarizing the advantages and disadvantages of the different types. Finally, the development trend of the nonlinear broadband vibration energy harvesters is also given.
引文
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