The multiple forms of vibration exist in an ambient environment diffusely and already become a considerable object for energy harvesting. However, how to effectively extract low-level, low-frequency, and multi-directional vibration from the ambient environment is becoming a key issue in the field of energy harvesting. To solve this issue, a tower-shaped piezoelectric vibration energy harvester (TS-PVEH) is reported. Finite element simulation indicates that TS-PVEH works in two fundamental modes, i.e., its in-plane and out-of-plane vibration modes. Meanwhile, simulation results show that the natural frequency of TS-PVEH is 3.39 Hz, 3.40 Hz, and 11.50 Hz, respectively; and the experiments also verified that. By virtue of the tower structure of TS-PVEH, the device is pretty sensitive to three-dimensional vibration. At a low level of acceleration 1 m/s², the maximum load power of TS-PVEH is 65.8 µW in out-of-plane mode and 17.2 µW in in-plane mode, respectively. Furthermore, the effects of the PVDF connection mode on the output performance of TS-PVEH were studied in detail, and comparative experimental results show that a reasonable connection of PVDF can improve energy harvesting efficiency. The proposed TS-PVEH is expected to be used to scavenge energy from multi-dimensional, low-level, and low-frequency vibrations that present in an ambient environment.

多种形式的振动分散存在于周围环境中，已经成为能量收集的重要对象。然而，如何有效地从周围环境中提取出低水平，低频和多方向的振动已成为能量收集领域的关键问题。为了解决该问题，报道了塔形压电振动能量收集器（TS-PVEH）。有限元模拟表明，TS-PVEH以两种基本模式工作，即其平面内和平面外振动模式。同时，仿真结果表明，TS-PVEH的固有频率分别为3.39 Hz，3.40 Hz和11.50 Hz。实验也证明了这一点。借助TS-PVEH的塔式结构，该设备对三维振动非常敏感。低加速度时1 m / s^{如图2所示}，TS-PVEH的最大负载功率在平面外模式下为65.8 µW，在平面内模式下为17.2 µW。此外，详细研究了PVDF连接方式对TS-PVEH输出性能的影响，对比实验结果表明，合理连接PVDF可以提高能量收集效率。拟议中的TS-PVEH有望用于消除周围环境中存在的多维，低级和低频振动的能量。