27.4 Multi-Beam Shared-Inductor Reconfigurable Voltage/SECE-Mode Piezoelectric Energy Harvesting of Multi-Axial Human Motion

2019 IEEE International Solid- State Circuits Conference - (ISSCC) Pub Date : 2019-03-06 DOI:10.1109/ISSCC.2019.8662414

Miao Meng, Ahmed Ibrahim, T. Xue, H. Yeo, Dixiong Wang, S. Roundy, S. Trolier-McKinstry, M. Kiani

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引用次数: 19

Abstract

The past few years have witnessed a growing demand for self-powered wearables that can enable vigilant health monitoring, with 24/7 operation. Energy harvesting from human-body motion is attractive for wearables; however, conventional unidirectional single-cantilever-beam piezoelectric energy harvesters (PEHs) [1]–[4] suffer from several body-motion harvesting challenges: such as multi-axial motion, irregular frequencies, and unpredictable amplitudes with frequent low-power levels [5]. To address these challenges, an eccentric rotor-based inertial PEH has been developed, which utilizes multiple magnetically plucked flexible thin-film $(60 \mu \mathrm {m})$ PZT-nickel-PZT beams to significantly increase the harvested energy within a small volume [5]; compared to bulk-PZT beams that are more feasible in direct-force-driven PEHs. The wrist-worn multi-beam PEH, shown in Fig. 27.4.1, converts multi-axial body motion into AC voltages with different phases and decaying amplitudes (up to several volts) within the frequency range of 90–160Hz for each beam.

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27.4多光束共享电感可重构电压/ sece模式压电能量采集的多轴人体运动

过去几年，人们对自供电可穿戴设备的需求不断增长，这些设备可以实现全天候的健康监测。从人体运动中收集能量对可穿戴设备很有吸引力;然而，传统的单向单悬臂梁压电能量采集器(PEHs)[1] -[4]面临着几个身体运动收集方面的挑战:如多轴运动、不规则频率和频繁低功率电平的不可预测振幅[5]。为了解决这些挑战，一种基于偏心转子的惯性PEH已经被开发出来，它利用多个磁弹拨柔性薄膜$(60 \mu \ mathm {m})$ pzt -镍- pzt光束在小体积内显着增加收获的能量[5];与块状pzt梁相比，块状pzt梁在直接力驱动的PEHs中更可行。如图27.4.1所示，腕戴式多波束PEH将多轴体运动转换为每波束在90-160Hz频率范围内具有不同相位和衰减幅度(可达数伏)的交流电压。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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2019 IEEE International Solid- State Circuits Conference - (ISSCC)

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