Broadband piezoelectric energy harvesting devices using multiple bimorphs with different operating frequencies

Xue, Huan; Hu, Yuantai; Wang, Qing-Ming

doi:10.1109/tuffc.903

Cited by 262 publications

(61 citation statements)

References 9 publications

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“…[88][89][90] This method is easy to implement but has the obvious disadvantage of leading to significantly higher weight and volume of the system. Additionally, for a given input frequency, only one of the harvesters in the array can respond at its resonance.…”

Section: Bandwidth Broadening Of Piezoelectric Energy Harvestersmentioning

confidence: 99%

Energy harvesting from low frequency applications using piezoelectric materials

Tian

Deng

2014

Applied Physics Reviews

560

340

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In an effort to eliminate the replacement of the batteries of electronic devices that are difficult or impractical to service once deployed, harvesting energy from mechanical vibrations or impacts using piezoelectric materials has been researched over the last several decades. However, a majority of these applications have very low input frequencies. This presents a challenge for the researchers to optimize the energy output of piezoelectric energy harvesters, due to the relatively high elastic moduli of piezoelectric materials used to date. This paper reviews the current state of research on piezoelectric energy harvesting devices for low frequency (0-100 Hz) applications and the methods that have been developed to improve the power outputs of the piezoelectric energy harvesters. Various key aspects that contribute to the overall performance of a piezoelectric energy harvester are discussed, including geometries of the piezoelectric element, types of piezoelectric material used, techniques employed to match the resonance frequency of the piezoelectric element to input frequency of the host structure, and electronic circuits specifically designed for energy harvesters.

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Section: Bandwidth Broadening Of Piezoelectric Energy Harvestersmentioning

confidence: 99%

Energy harvesting from low frequency applications using piezoelectric materials

Tian

Deng

2014

Applied Physics Reviews

560

340

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“…The assumptions of the model are:Euler-Bernoulli beam theory is applied (see also a discussion about its adequacy in [29,30]);A complex damping;A perfect adhesion between the metal substrate and the piezo element;An ideal clamped beam;The end mass connection spring is linear and has the same behavior both in compression and in tension.…”

Section: The Analytical Modelmentioning

confidence: 99%

“…As in [28], the electrical part of the harvester is not considered when designing the band-pass filter. Xue et al [30] follow the work of Shahruz [28,29] by numerically investigating an array of multiple bimorphs sandwiching carrying cantilever beams without tip beams. Each beam has a different natural frequency due to different height, thus leading to a large band-pass.…”

Section: Introductionmentioning

confidence: 99%

Analysis and Experimental Validation of a Piezoelectric Harvester with Enhanced Frequency Bandwidth

Abramovich

Har-nes

2018

Materials

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The use of a single bimorph as a harmonic oscillator aimed at harvesting vibrational energy is not effective due to its inherent narrow frequency bandwidth stemming from the need to adjust the natural frequency of the harvester to the platform excitation frequencies. Therefore, the present research focuses on the development, manufacturing, and testing of an advanced system based on three bimorphs, capable of adjusting their natural frequencies using tip end masses, and interconnected by springs, thus enlarging the system’s bandwidth. An analytical model was developed for three bimorphs interconnected by two springs with three end masses. The model can predict the output generated voltage from each bimorph, and then the total output power is measured on a given outside resistor as a function of the material properties, the geometric dimensions of the vibrating beams, the end-masses, and the spring constants. The analytical model was then compared with data in the literature, yielding a good correlation. To further increase the reliability of the model, a test set-up was designed and manufactured that included three bimorphs with three end-masses connected by two springs. The system was excited using a shaker, and the output voltage was measured for each bimorph for various configurations. Then, the analytical model was tuned based on the test results by introducing two factors, the quality and the stiffness factors, and the predictions of the calibrated analytical model were compared with the experimental results, yielding a good correlation. The calibrated analytical model was then used to perform a comprehensive parametric investigation for two and three bimorphs systems, in which the influences of various parameters—like spring constant, mass value, thickness, and width and length of the bimorph and the substrate beam—on the output generated power were investigated. The main conclusion from this parametric investigation was that by correctly choosing the geometric sizes of the cantilevers, the adequate tip end masses, and the ratio between constants of the springs, the frequency bandwidth is expanded yielding a higher harvested power. Typical harvested power of the present designed system can reach up to 20 mW at the first natural frequency and up to 5 mW for the second natural frequency.

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“…There are two possible methods to optimize the output power under time-varying vibration source: widening the bandwidth and tuning the resonant frequency. 13 The methods for widening the bandwidth can employ an array of cantilevers with different resonant frequencies, 14,15 nonlinear systems, 16 bi-stable structure, 17 and using amplitude limiter. 18 Widening of harvester bandwidth is suitable for vibration containing multiple frequencies or for random vibration sources.…”

Section: Introductionmentioning

confidence: 99%

A review on frequency tuning methods for piezoelectric energy harvesting systems

Ibrahim

Ali

2012

Journal of Renewable and Sustainable Energy

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Design and testing of piezoelectric energy harvester for powering wireless sensors of electric line monitoring system J. Appl. Phys. 111, 07E510 (2012); 10.1063/1.3677771 Broadband energy-harvesting using a two degree-of-freedom vibrating body Appl. Phys. Lett. 98, 214102 (2011); 10.1063/1.3595278 Piezoelectric energy harvesting using shear mode 0.71 Pb ( Mg 1 / 3 Nb 2 / 3 ) O 3 -0.29 PbTiO 3 single crystal cantilever Appl. Phys. Lett. 96, 083502 (2010); 10.1063/1.3327330Study on structure optimization of a piezoelectric cantilever with a proof mass for vibration-powered energy harvesting systemPiezoelectric energy harvesting technologies have received a great attention during the last decade to design self-powered microelectronic devices such as wireless sensor nodes. Piezoelectric energy harvester is a resonant system that produces maximum power output when its resonant frequency matches the ambient vibration frequency. The deviation from the resonance causes significant decrease in the power output. There are two possible solutions to compensate the effect of frequency deviation: widening the operating frequency bandwidth and tuning the resonant frequency. Tuning the resonant frequency is a more efficient technique for applications with single time varying dominant frequency. This paper presents a comprehensive review of frequency tuning methods for piezoelectric energy harvesting systems. Two categories generally investigated in the literature include manual and autonomous tuning methods. The recent developments of many tuning strategies are discussed and summarized. V C 2012 American Institute of Physics.

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Broadband piezoelectric energy harvesting devices using multiple bimorphs with different operating frequencies

Cited by 262 publications

References 9 publications

Energy harvesting from low frequency applications using piezoelectric materials

Energy harvesting from low frequency applications using piezoelectric materials

Analysis and Experimental Validation of a Piezoelectric Harvester with Enhanced Frequency Bandwidth

A review on frequency tuning methods for piezoelectric energy harvesting systems

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