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首页> 外文期刊>IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control >Shear-Mode-Based Cantilever Driving Low-Frequency Piezoelectric Energy Harvester Using 0.67Pb(Mg1/3Nb2/3)O3-0.33PbTiO3
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Shear-Mode-Based Cantilever Driving Low-Frequency Piezoelectric Energy Harvester Using 0.67Pb(Mg1/3Nb2/3)O3-0.33PbTiO3

机译：基于剪切模式的0.67Pb（Mg 1/3 Nb 2/3 ）O 3 -驱动悬臂式压电能量采集器0.33PbTiO 3

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摘要

Energy harvesting from external mechanical excitation has become a hot interest area, and relaxor piezoelectric single crystal ( )Pb(Mg1/3Nb2/3)O3- PbTiO3 (PMN- PT or PMN-PT) has attracted continuous attention due to the well-known ultrahigh shear-mode electromechanical response. To exploit the low-frequency application of excellent shear-mode performance of the PMN-PT single crystal, we proposed a Shear-mode-based CANtilever Driving Low-frequency Energy harvester. The device is composed of two symmetrically assembled sandwich structures and a cantilever, in which sandwich structures can be driven by the cantilever. An analytical method was used to illustrate the high output mechanism, and a finite-element method model of the device was also established to optimize the generated electric energy in this device. The electrical properties of the device under different excitation frequencies and load resistances were studied systematically. The maximum voltage and power density at resonance frequency (43.8 Hz) were measured to be 60.8 V and 10.8 mW/cm3 under a proof mass of 13.5 g, respectively. Both theoretical and experimental results demonstrate the considerable potential of the resonance-excited shear-mode energy harvester applied to wireless sensors and low-power portable electronics.
机译：外部机械激发的能量收集已成为人们关注的热点，驰豫压电单晶（）Pb（Mg1 / 3Nb2 / 3）O3- PbTiO3（PMN-PT或PMN-PT）引起了人们的持续关注。超高剪切模式机电响应。为了开发PMN-PT单晶具有出色剪切模式性能的低频应用，我们提出了一种基于剪切模式的CANtilever驱动低频能量收集器。该装置由两个对称组装的夹心结构和一个悬臂组成，其中夹心结构可以由悬臂驱动。使用解析方法来说明高输出机理，并建立了该设备的有限元方法模型以优化该设备中产生的电能。系统地研究了器件在不同激励频率和负载电阻下的电性能。在13.5 g的标准质量下，在共振频率（43.8 Hz）处测得的最大电压和功率密度分别为60.8 V和10.8 mW / cm3。理论和实验结果均表明，共振激发的剪切模式能量采集器可应用于无线传感器和低功率便携式电子产品，具有巨大的潜力。

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