4.7 Article

Optimisation of a forced multi-beam piezoelectric energy harvester

期刊

ENERGY CONVERSION AND MANAGEMENT
卷 270, 期 -, 页码 -

出版社

PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.enconman.2022.116257

关键词

High-power energy harvester; Multi-beam piezoelectric; Plucking; Frequency-up conversion; Multi-dimension global optimisation; Self-powered applications; Random excitation

资金

  1. Brazilian National Council for Scientific and Technological Development-CNPq
  2. National Natural Science Foundation of China
  3. [202615/2019-7]
  4. [IEC/NSFC/201127]
  5. [12111530105]

向作者/读者索取更多资源

This study presents a high-power multi-beam piezoelectric energy harvesting device designed to meet the demands of emerging technologies in sensor networks, the Internet of Things, and industrial IoT. The device can be tuned to any frequency and demonstrates superior performance in the frequency range of 2-50 Hz, delivering hundreds of mW.
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.

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