Appl Phys Lett 119(10):100502Ĭao DX, Wang JR, Guo XY, Lai SK, Shen YJ (2022) Recent advancement of flow-induced piezoelectric vibration energy harvesting techniques: principles, structures, and nonlinear designs. Wang J, Yurchenko D, Hu G, Zhao L, Tang L, Yang Y (2021) Perspectives in flow-induced vibration energy harvesting. Zou HX, Zhao LC, Gao QH, Zuo L, Liu FR, Tan T, Wei KX, Zhang WM (2019) Mechanical modulations for enhancing energy harvesting: Principles, methods and applications. Tan T, Yan ZM, Zou HX, Ma KJ, Liu FR, Zhao LC, Peng ZK, Zhang WM (2019) Renewable energy harvesting and absorbing via multi-scale metamaterial systems for Internet of things. The investigation demonstrates that the pendulum impact-driven could enhance the low-frequency responses, which helps the PVEH achieve the energy harvesting from broadband low-frequency ambient vibration. Finally, experimental investigations are carried out to verify the energy harvesting performance, and 19 light-emitting diodes (LEDs) are lit up to assess the prospective applications of the proposed impact-driven PVEH. The results show that the proposed PVEH can obtain 0.6 mW and 6.4 mW output powers when the excitation frequencies are 5 Hz and 34 Hz with 0.5 g excitation amplitude and the optimum load resistance, respectively. Dynamic equations are established, and the vibration characteristics are analyzed by comparing the results of the finite element analysis (FEA) and numerical simulation, where the natural frequencies and modes are studied, and the effects of pendulum impact-driven enhancement on the energy harvesting performance are analyzed in detail. The impact-driven tuning fork-shaped PVEH with adjustable mechanisms is first designed, and the working principle is introduced in detail. In this study, a tuning fork-shaped PVEH with pendulum impact-driven enhancement is proposed for energy harvesting from broadband low-frequency vibration. How to match the ambient vibration frequencies, which are always random and broadband, is a key point to design a PVEH. A piezoelectric vibration energy harvester (PVEH), as a self-power device that can convert ambient vibration energy into electric energy, has extensive application prospects in power supply for microsensors used in Internet of Things (IoT).

Tuning fork low frequency