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利用压电材料制作的器件采集环境中的振动能量,并转化为电能的微尺度器件正日益受到广泛关注。通过有限元仿真分析,研究了新颖的垂直式纳米线阵列结构(VING)和常见的压电悬臂梁结构的能量收集性能。在更贴近实际情况的低频条件下计算了75 000根纳米线阵列结构和压电悬臂梁结构的输出电压以及单位体积能量输出功率,并指出了其各自的特点。最后得出结论:VING更适于在振动强度较大的环境中工作,而悬臂梁结构则更适于在接近其谐振频率的环境中工作。
Micro-scale devices that use devices made of piezoelectric materials to capture the vibrational energy in the environment and convert it into electrical energy are gaining more and more attention. Through the finite element simulation analysis, the energy collection performance of the novel vertical nanowire array structure (VING) and the common piezoelectric cantilever beam structure are studied. The output voltages of 75 000 nanowire array structures and piezoelectric cantilever structures and the energy output per unit volume were calculated under the condition of low frequency, which is closer to the actual situation. Their respective characteristics were pointed out. Finally, we conclude that VING is more suitable for working in environments with higher vibration intensity, while the cantilever structure is more suitable to work in the environment close to its resonant frequency.