Dual resonant structure for energy harvesting from random vibration sources at low frequency

Li, Shanshan; Peng, Ziqi; Ai, Zhang; Wang, Fei

doi:10.1063/1.4941353

Cited by 47 publications

(22 citation statements)

References 18 publications

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“…There are a few solutions for vibration-to-electricity conversion naming as electromagnetic, 5,6 piezoelectric, [7][8][9][10] triboelectricity, 11,12 and electrostatic principles. [13][14][15][16] Based on these principles, induced current or induced charges can be generated when a proof mass vibrates according to the external excitation.…”

Section: Introductionmentioning

confidence: 99%

Electrostatic energy harvesting device with dual resonant structure for wideband random vibration sources at low frequency

Zhang

Wang

et al. 2016

Review of Scientific Instruments

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In this paper, we present design and test of a broadband electrostatic energy harvester with a dual resonant structure, which consists of two cantilever-mass subsystems each with a mass attached at the free edge of a cantilever. Comparing to traditional devices with single resonant frequency, the proposed device with dual resonant structure can resonate at two frequencies. Furthermore, when one of the cantilever-masses is oscillating at resonance, the vibration amplitude is large enough to make it collide with the other mass, which provides strong mechanical coupling between the two subsystems. Therefore, this device can harvest a decent power output from vibration sources at a broad frequency range. During the measurement, continuous power output up to 6.2-9.8 μW can be achieved under external vibration amplitude of 9.3 m/s at a frequency range from 36.3 Hz to 48.3 Hz, which means the bandwidth of the device is about 30% of the central frequency. The broad bandwidth of the device provides a promising application for energy harvesting from the scenarios with random vibration sources. The experimental results indicate that with the dual resonant structure, the vibration-to-electricity energy conversion efficiency can be improved by 97% when an external random vibration with a low frequency filter is applied.

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Section: Introductionmentioning

confidence: 99%

Electrostatic energy harvesting device with dual resonant structure for wideband random vibration sources at low frequency

Zhang

Wang

et al. 2016

Review of Scientific Instruments

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“…The experiments revealed that at acceleration of 1 g the bandwidth of the device was 14 Hz (14–28 Hz) and peak power output was 0.35 µW. The same authors have investigated another dual resonator system harvesting energy from both forced vibration and impact coupling [34]. Both experiments and modelling proved the dual resonator system produced higher energy output than both cantilevers separately.…”

Section: Introductionmentioning

confidence: 99%

Vibro-Shock Dynamics Analysis of a Tandem Low Frequency Resonator—High Frequency Piezoelectric Energy Harvester

Žižys

Gaidys

Ostaševičius

et al. 2017

Sensors

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Frequency up-conversion is a promising technique for energy harvesting in low frequency environments. In this approach, abundantly available environmental motion energy is absorbed by a Low Frequency Resonator (LFR) which transfers it to a high frequency Piezoelectric Vibration Energy Harvester (PVEH) via impact or magnetic coupling. As a result, a decaying alternating output signal is produced, that can later be collected using a battery or be transferred directly to the electric load. The paper reports an impact-coupled frequency up-converting tandem setup with different LFR to PVEH natural frequency ratios and varying contact point location along the length of the harvester. RMS power output of different frequency up-converting tandems with optimal resistive values was found from the transient analysis revealing a strong relation between power output and LFR-PVEH natural frequency ratio as well as impact point location. Simulations revealed that higher power output is obtained from a higher natural frequency ratio between LFR and PVEH, an increase of power output by one order of magnitude for a doubled natural frequency ratio and up to 150% difference in power output from different impact point locations. The theoretical results were experimentally verified.

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“…Firstly, it has the potential to achieve wider or even unlimited bandwidth by adding LFDBs connected with ropes. Secondly, the output power will not be weakened with the increasing number of LFDBs, unlike arrays of beams vibration energy harvester (AB-VEH) for wider bandwidth [19][20][21][22][23], and the reason in shown below. …”

Section: Frequency Upconversion and Multimodal Mechanismsmentioning

confidence: 99%

“…In the case of the multimodal harvesting technique, it is mainly based on the structure of beam arrays, which have different frequencies to match the wideband excitation's components, can be classified into unconnected mechanical structure systems [19][20][21][22][23]-connected mechanical structure systems using springs [24,25]-and multi-resonance systems [26][27][28][29][30][31]. Compared with a conventional single piezoelectric beam EH, much higher bandwidth of the EH can be realized by the multimodal harvesting technique.…”

Section: Introductionmentioning

confidence: 99%

A Novel Ropes-Driven Wideband Piezoelectric Vibration Energy Harvester

et al. 2016

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This paper presents a novel piezoelectric vibration energy harvester (PVEH) in which a high-frequency generating beam (HFGB) is driven by an array of low-frequency driving beams (LFDBs) using ropes. Two mechanisms based on frequency upconversion and multimodal harvesting work together to broaden the frequency bandwidth of the proposed vibration energy harvester (VEH). The experimental results show that the output power of generating beam (GB) remains unchanged with the increasing number of driving beams (DBs), compared with the traditional arrays of beams vibration energy harvester (AB-VEH), and the output power and bandwidth behavior can be adjusted by parameters such as acceleration, rope margin, and stiffness of LFDBs, which shows the potential to achieve unlimited wideband vibration energy-harvesting for a variable environment.

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Dual resonant structure for energy harvesting from random vibration sources at low frequency

Cited by 47 publications

References 18 publications

Electrostatic energy harvesting device with dual resonant structure for wideband random vibration sources at low frequency

Electrostatic energy harvesting device with dual resonant structure for wideband random vibration sources at low frequency

Vibro-Shock Dynamics Analysis of a Tandem Low Frequency Resonator—High Frequency Piezoelectric Energy Harvester

A Novel Ropes-Driven Wideband Piezoelectric Vibration Energy Harvester

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