采收环境振动能量为无线网络传感器供电是近年来研究的热点,目前还没有一个完整的理论和解决方案.文中设计了一种压电悬臂梁结构的环境振动能量采收装置,研究了悬臂梁压电振子结构受激励后产生电荷量与频率的关系,并进行了ANSYS仿真,得出了最佳的机电耦合模型和压电悬臂梁几何尺寸对固有频率的影响的关系.为采收环境低频振动能量,实现网络传感器自供电装置提供了设计的理论依据.%Vibration energy harvesting in environment for the power supply of wireless sensor networks is hot in recent years, and it has no complete theory or solutions. A piezoelectric cantilever device for vibration energy harvesting was designed, the relationship between quantity of electric charge and frequency was researched after the incentive on the piezoelectric cantilever,and the ANSYS simulation was carried on,that the best electric-mechanical coupling model was established and the impact of piezoelectric cantilever geometry to the natural frequency was obtained. It provides a theoretical basis for harvesting the low-frequency vibration energy in environment and designing self-powered device of sensor network.
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