A high-power multi-beam piezoelectric energy harvesting device is designed to meet the demands of the emerging technologies in Body Sensors Networks (BSNs), Wireless Sensors Networks (WSNs), the Internet of Things (IoT) and the Industrial Internet of Things (IIoTs). The proposed device utilises a plucking mechanism to excite the beams, organised in a comb-like structure. The harvester is presented in different length configurations and its performance is optimised to deliver the highest power under a given set of parameter values, constraints, and excitation characteristics. The unique feature of the device is that it can be tuned to any given frequency, although it demonstrates its superior performance in the frequency range of 2–50 Hz, delivering hundreds of mW. The device optimisation is conducted using a harmonic excitation, a harmonic excitation with random phase modulations, experimental vibration data collected using an internal combustion engine, and numerical data from simulations of out-of-plane oscillations of wind turbine blades. The paper proposes solutions to a number of challenges specific for multi-beam structures that have never been addressed before. It is demonstrated for the first time that the proposed harvester is able to meet the demands of relevant sensing applications.

一种高功率多光束压电能量收集装置旨在满足身体传感器网络 (BSN)、无线传感器网络 (WSN)、物联网 (IoT) 和工业物联网中新兴技术的需求。物联网）。所提出的装置利用采摘机制来激发光束，以梳状结构组织。收割机具有不同的长度配置，其性能经过优化，可在给定的一组参数值、约束和激励特性下提供最高功率。该设备的独特之处在于它可以调谐到任何给定的频率，尽管它在 2-50 Hz 的频率范围内展示了其卓越的性能，可提供数百 mW 的功率。使用谐波激励进行设备优化，具有随机相位调制的谐波激励，使用内燃机收集的实验振动数据，以及来自风力涡轮机叶片平面外振荡模拟的数值数据。该论文针对以前从未解决过的多梁结构所特有的一些挑战提出了解决方案。首次证明所提出的收割机能够满足相关传感应用的需求。