Xuteng Du, Xiaobiao Shan, Chengwei Hou, Guangdong Sui, Xiaofan Zhang
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引用次数: 0
Abstract
Inspired by L-shaped hammer Stockbridge damper on overhead transmission lines, this work proposes a novel multi-band dual-beam coupled vibration piezoelectric energy harvester for efficiently harvesting cable vibration energy. The harvester’s core comprises two dual-beam piezoelectric oscillators, which together can generate a total of four harvesting frequency bands through structural parameter adjustments, extending the operational range. To evaluate performance, finite element analysis and experiments were used to investigate the influence of key parameters. The work revealed that the beam spacing (D), length ratio (Lr), and additional mass (M2) significantly affected the second-order vibration mode. Specifically, D = 38 mm, Lr = 0.54, and M2 = 3 g represented the critical points for the transition of the second-order vibration mode. The coupled structure enables the specific Lr and M2 to effectively enhance the output of the floating cantilever beam at its first-order resonance. Furthermore, the work investigated the harvester’s capability to harvest vibration energy from different directions. Under baseline conditions, the power densities at first-order resonance for the elastic supporting beam and floating cantilever beam are 16.967 mW/cm3 and 1.767 mW/cm3, respectively, and 4.45 mW/cm3 and 11.20 mW/cm3 at second-order resonance, providing stable power to wireless sensor nodes in the environment.
期刊介绍:
Encouraging a transition to a sustainable energy future is imperative for our world. Technologies that enable this shift in various sectors like transportation, heating, and power systems are of utmost importance. Sustainable Energy Technologies and Assessments welcomes papers focusing on a range of aspects and levels of technological advancements in energy generation and utilization. The aim is to reduce the negative environmental impact associated with energy production and consumption, spanning from laboratory experiments to real-world applications in the commercial sector.