Fan Xuhong, Zhao Chongming, Jiang Wenan
Faculty of Civil Engineering and Mechanics, Jiangsu University, Zhenjiang 212013, China.
Micromachines (Basel). 2025 Mar 27;16(4):378. doi: 10.3390/mi16040378.
To address the low electromechanical conversion efficiency associated with traditional single-degree-of-freedom (SDOF) piezoelectric energy harvesters, this study proposes a two-degree-of-freedom (2-DOF) cut-out piezoelectric beam for wind-induced vibration energy harvesting. Experimental comparisons conducted on four bluff bodies indicated that the triangular column exhibits superior aerodynamic stability, achieving an output voltage of 11.6 V at a wind speed of 7.0 m/s. Furthermore, the cut-out piezoelectric beam demonstrated a 1.9-fold increase in output voltage compared to its non-cut-out counterpart. These results underscore the potential of the 2-DOF cut-out piezoelectric beam design as an autonomous power solution for IoT nodes operating in complex environments.
为了解决传统单自由度（SDOF）压电能量收集器机电转换效率低的问题，本研究提出了一种用于风致振动能量收集的两自由度（2-DOF）切口压电梁。对四种钝体进行的实验比较表明，三角柱具有卓越的气动稳定性，在风速为7.0 m/s时输出电压达到11.6 V。此外，与未切口的压电梁相比，切口压电梁的输出电压提高了1.9倍。这些结果凸显了两自由度切口压电梁设计作为在复杂环境中运行的物联网节点自主供电解决方案的潜力。
