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Harvesting of Ambient Floor Vibration Energy Utilizing Micro-Electrical Mechanical Devices

机译：利用微电路机械收割环境楼层振动能量

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摘要

Recent advances in device fabrication and energy harvesting technology combined with an increasing need for sustainable energy generation have encouraged the development of the micro-electro-mechanical (MEMS) energy harvesting model for floor vibrations presented herein. By calibrating arrays of MEMS energy harvesters in resonance with floor vibrations, building occupants become sustainable energy sources. Optimization of these harvesters to frequency ranges of floor vibrations, subsequent synchronization of harvester location to occupant flow and improved electromechanical modeling may result in an efficient, passive power source for low-demand applications independent of external environmental conditions. A model of a floor-harvester system is developed, utilizing ambient floor vibration to excite MEMS energy harvesters via harmonic base translation. These devices then convert the mechanical vibrations to electrical power. Design considerations for piezoelectric-based energy harvesters inspired by MEMS-scale arrays are investigated. Single degree of freedom and distributed beam parameter electromechanical models are employed to predict performance, by optimization of resonant frequencies from measured low-level ambient vibrations. A simplified analytical expression for a frequency correction factor accounting for shear deformation and rotatory inertia effects is derived in terms of fundamental system parameters. Floor and energy harvesting device models are validated by comparison to experimental results and numerical modeling, respectively.
机译：近期设备制造和能量收集技术的进展与越来越多的可持续能源产生需求相结合，鼓励了本文呈现的微电机械（MEMS）能量收集模型的发展。通过用地板振动的共振校准MEMS能量收割机，建筑物成为可持续能源。这些收割机的优化对地板振动的频率范围，随后的收割机位置与乘员流程的同步和改善的机电建模可能导致低需求应用的有效的无源电源，而不独立于外部环境条件。开发了一种楼层收割机系统的模型，利用环境地板振动来通过谐波碱基翻译激发MEMS能量收割机。然后这些装置将机械振动转换为电力。研究了由MEMS级阵列的压电的能量收割机的设计考虑因素。通过从测量的低级环境振动优化谐振频率来预测性能，采用单一自由度和分布式光束参数机电模型。在基本系统参数方面，导出了用于剪切变形和旋转惯量效应的频率校正因子核算的简化分析表达。通过与实验结果和数值建模相比，通过与实验结果和数值建模进行验证地板和能量收集装置模型。

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