采用弯曲梁的压电式多方向宽频振动能量采集器

Piezoelectric Multi-directional Broadband with Curved Beams Vibration Energy Harvester

针对现有宽频多方向能量采集器频带窄、结构复杂、成本高等不足,本文提出了一种采用L型弯曲弹性梁的宽频多方向振动能量采集器,并探讨其工作原理、进行实验研究。结果表明:当外界加速度0.4g时,在x、y方向获得宽频采集特性,其带宽约5Hz,z方向带宽约2Hz;在x、y、z方向分别得到约2.5、3V和6V的峰-峰值电压。可见,弯曲弹性梁压电式多方向宽频振动能量采集器不仅具有宽频特性,而且还实现了多方向的能量采集。

In view of the shortcomings of the existing broadband multi-directional energy collector,such as narrow frequency band,complex structure and high cost,a broadband multi-directional vibration energy collector with Lshaped flexural elastic beam was proposed in this paper,and its working principle and experimental research are dis?cussed.The results show that when the external acceleration is 0.4g,the broadband acquisition characteristics are ob?tained in the x and y directions,with a bandwidth of about 5Hz,a bandwidth of about 2Hz in the z direction,and a peak-peak voltage of about 2.5,3V and 6V in the x,y and z directions,respectively.It can be seen that the piezoelec?tric multi-directional broadband vibration energy collector with flexural elastic beams not only has broadband charac?teristics,but also achieves multi-directional energy acquisition.