Energy harvesting from wind-induced vibrations is considered to be a promising solution for the power requirements of wireless sensor nodes. This paper proposes an enhanced piezoelectric wind-induced vibration energy harvester (EPWEH) via the interplay between the cylindrical shell and diamond-shaped baffle to improve reliability, environmental adaptability, and power generation performance. Different from the most existing hybrid piezoelectric wind energy harvesters where the interaction of vortex-induced vibration and galloping was mainly implemented by altering the cylinder geometry, this EPWEH realized the coupling between vortex-induced vibration and galloping through introducing a downstream diamond-shaped baffle to change the aeroelastic instability of the cylinder. Besides, the pre-bending vibrator only subjected to the unidirectional compressive stress was employed and embedded inside the hollow cylinder, thus avoiding the drawbacks of bidirectional deformation of the traditional piezoelectric vibrator and direct contact between piezoelectric element and fluid. The feasibility of the structure and principle of the EPWEH was proved through a series of experiments. The experimental results demonstrated that the compound-embedded structure led to a coupling phenomenon of VIV and galloping on the cylindrical shell. Besides, it exhibited that the structural parameters brought a significant impact on the vibration characteristics, power generation performance, and wind speed bandwidth of EPWEH as well. Thanks to the performance improvement effect of the baffle, the EPWEH could reach a maximum voltage output enhancement of 910.1% and provide a maximum output power density of 5.493 mW/cm³ at an optimal load resistance of 200 kΩ. It is expected that this compound-embedded structure can provide a reference for performance improvement of the existing PWEHs.

从风引起的振动中收集能量被认为是满足无线传感器节点功率要求的有前途的解决方案。本文通过圆柱形外壳和菱形挡板之间的相互作用，提出了一种增强型压电风振能量收集器（EPWEH），以提高可靠性、环境适应性和发电性能。不同于现有的混合压电风能收集器主要通过改变圆柱体的几何形状来实现涡激振动和飞驰的相互作用，该EPWEH通过在下游引入菱形挡板来实现涡激振动和飞驰之间的耦合。改变气缸的气动弹性不稳定性。除了，采用仅受单向压应力的预弯振子嵌入空心圆柱体内，避免了传统压电振子双向变形和压电元件与流体直接接触的弊端。通过一系列实验证明了EPWEH结构和原理的可行性。实验结果表明，复合嵌入结构在圆柱壳上导致了VIV和飞驰的耦合现象。此外，还表明结构参数对EPWEH的振动特性、发电性能和风速带宽也有显着影响。得益于挡板的性能提升效果，³在 200 kΩ 的最佳负载电阻下。预计这种化合物嵌入结构可为现有PWEHs的性能提升提供参考。