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Effective piezoelectric energy harvesting using beam plucking and a synchronized switch harvesting circuit

机译：使用梁采集的有效压电能量收集和同步开关收集电路

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Piezoelectric energy harvesting, as a way to convert kinetic energy into electricity for low-power electronics, has drawn great attention for the last decade. However, issues still remain, including narrow operating bandwidth and low harvesting capability. In this paper, beam plucking (frequency up-conversion) and a parallel synchronized switch harvesting on inductor (P-SSHI) circuit are integrated in a piezoelectric energy harvester to improve the energy harvesting capability over a wide operating bandwidth. A theoretical model for the plucked beam is established using a distributed-parameter method. In order to study the system dynamics, an equivalent circuit for the plucked beam is built to integrate with the P-SSHI circuit. System dynamics, including the input power, beam tip displacement and output power, are investigated for different driving frequencies and load resistance. The plucked beam provides a uniform and single-frequency vibration for the P-SSHI to generate reliable switching events for any low-frequency wideband vibration; the P-SSHI circuit exhibits an improved electrical damping ratio which is beneficial to alleviating the power fluctuation issue for plucked beams at high frequencies. An experimental validation was conducted, and a close match was obtained. Enhanced output power with low power fluctuation was obtained in the plucked beam and P-SSHI circuit configuration over a wide frequency bandwidth with constant load resistance.
机译：压电能量收获，作为将动能转化为低功耗电子电力的动力，在过去十年中引起了很大的关注。但是，问题仍然存在，包括窄操作带宽和低收割能力。本文在电感器（P-SSHI）电路上集成在压电能量收割机中，在压电能量收割机中集成了梁拔除（频率上转换）和平行同步开关收获，以改善宽工作带宽上的能量收集能力。采用分布式参数法建立了拔光光束的理论模型。为了研究系统动力学，采用拔光光束的等效电路以与P-SSHI电路集成。为不同的驱动频率和负载电阻研究了系统动态，包括输入功率，光束尖端位移和输出功率。拆除的光束为P-SSHI提供均匀和单频振动，为任何低频宽带振动产生可靠的开关事件; P-SSHI电路表现出改进的电阻率，这有利于缓解在高频下采集梁的功率波动问题。进行了实验验证，获得了密切匹配。在具有恒定负载电阻的宽频带宽上，在采集的光束和P-SSHI电路配置中获得了具有低功率波动的增强的输出功率。

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