A novel up-converting mechanism based on double impact for non-linear piezoelectric energy harvesting

Febbo, Mariano; Machado, Sebastián P.; Osinaga, Santiago

doi:10.1088/1361-6463/abab28

Cited by 18 publications

(6 citation statements)

References 20 publications

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“…The electrical energy can be extracted from the transient vibration of the short beam with high efficiency. In recent years, some similar studies in energy harvesting based on frequency-up conversion with impact type can be also seen in [10][11][12][13].…”

Section: Introductionmentioning

confidence: 89%

Dynamic Modeling and Experimental Validation of an Impact-Driven Piezoelectric Energy Harvester in Magnetic Field

Chen

2020

Sensors

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In this study, an impact-driven piezoelectric energy harvester (PEH) in magnetic field is presented. The PEH consists of a piezoelectric cantilever beam and plural magnets. At its initial status, the beam tip magnet is attracted by a second magnet. The second magnet is moved away by hand and then the beam tip magnet moves to a third magnet by the guidance of the magnetic fields. The impact occurs when the beam motion is stopped by the third magnet. The impact between magnets produces an impact energy and causes a transient beam vibration. The electric energy is generated by the piezoelectric effect. Based on the energy principle, a multi-DOF (multi-degree of freedom) mathematical model was developed to calculate the displacements, velocities, and voltage outputs of the PEH. A prototype of the PEH was fabricated. The voltages outputs of the beam were monitored by an oscilloscope. The maximum generated energy was about 0.4045 mJ for a single impact. A comparison between numerical and experimental results was presented in detail. It showed that the predictions based on the model agree with the experimental measurements. The PEH was connected to a diode bridge rectifier and a storage capacitor. The charges generated by the piezoelectric beam were stored in the capacitor by ten impacts. The experiments showed that the energy stored in the capacitor can light up the LED.

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Section: Introductionmentioning

confidence: 89%

Dynamic Modeling and Experimental Validation of an Impact-Driven Piezoelectric Energy Harvester in Magnetic Field

Chen

2020

Sensors

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“…[16][17][18] Narrow harvesting bandwidth can limit the performance of the harvester. Therefore, introducing sources of non-linearity is one of the main approaches to broaden the bandwidth, such as: integrating magnets into the structure of the harvester, 19,20 impact technique, 12,[21][22][23][24] and multi-modal technique. 25,26 Su 27 have proposed an impact 2DOF design that utilize two close resonant frequencies, with a piezoelectric diaphragm as a mechanical stopper causing a hardening effect to incorporate broadband harvesting.…”

Section: Introductionmentioning

confidence: 99%

A theoretical investigation of a two-degree-of-freedom vibro-impact triboelectric energy harvester for larger bandwidth

Hassan¹,

Ibrahim²

2023

Active and Passive Smart Structures and Integrated Systems XVII

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The efficiency of the energy harvesters can be improved by increasing the harvester bandwidth. Towards this, we presented a Two-Degree of Freedom (2-DOF) Vibro-impact Triboelectric Energy Harvester by combining multi-modality and piecewise linearity of two close resonant frequencies. The harvester structure consists of a primary cantilever beam attached to a secondary cantilever beam through a tip mass. The secondary beam is attached in the opposite direction to the primary beam. The bottom surface of the secondary beam acts as an upper electrode of a triboelectric generator. A lower electrode with bonded Polydimethylsiloxane (PDMS) insulator is attached at some gap separation distance underneath the upper electrode to create an impact structure. When the system vibrates, an impact between the triboelectric layers generates an alternating electrical signal. A 2-DOF system with lumped parameter theoretical model was developed to extract the governing equations. The structure’s dynamic behavior at different excitation levels, separation distance, and surface charge density were investigated theoretically. As a result, we achieved a wider bandwidth for the designed energy harvester. The proposed harvester demonstrated an increase in the maximum output voltage by more than 300 percent, and 250 percent increase in the bandwidth, by changing the excitation level from 0.1g to 0.7g. The result of this study can pave the way for an efficient energy harvester that can scavenge ambient vibrations over a wide range of excitation frequencies.

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“…53 Wang et al 54 introduced hybrid piezoelectric and triboelectric wind energy harvester, showing that the triboelectric boundaries help expand the effective operating wind speed range, in addition to constraining the maximum deformation of the beam at high wind speeds. Febbo et al 55 have proposed a double-impact frequency up-converting piezoelectric energy harvester having a C-shaped seismic mass at the tip of the driving beam which impacts twice in a cycle, leading to a nearly constant voltage output between impacts. Fang et al 56 have been able to harness the centrifugal softening effect in improving the impact energy harvesting performance at low rotational frequencies in their proposed piezoelectric rotational double impact energy harvester.…”

Section: Introductionmentioning

confidence: 99%

Numerical simulation of double impact 2DOF triboelectric energy harvesting for extended bandwidth

Hassan

Ibrahim

2023

Active and Passive Smart Structures and Integrated Systems XVII

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Increasing the bandwidth of the vibration energy harvesters is one of the research emphases to maximize the energy harvested from the ambient. Here we design a Two-Degree of Freedom Vibro-impact Triboelectric energy harvester with a double-impact configuration, which combines multi-modality and piecewise linearity to improve the harvesting bandwidth of triboelectric energy harvesters. The harvester structure consists of primary and secondary cantilever beams with two integrated energy harvesters. The two beams are designed to operate at close natural frequencies, and under the effect of the impact, triboelectricity is generated, and the bandwidths of the resonators are combined to create a wide bandwidth. The double impact system is investigated numerically to examine the structure's dynamic behavior at different excitation levels, separation distance, and surface charge density to extract an optimal parameter for achieving a wide combined bandwidth. The system demonstrates the capability of connecting multi-modality and piecewise linearity to significantly broaden the triboelectric energy harvester's bandwidth.

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A novel up-converting mechanism based on double impact for non-linear piezoelectric energy harvesting

Cited by 18 publications

References 20 publications

Dynamic Modeling and Experimental Validation of an Impact-Driven Piezoelectric Energy Harvester in Magnetic Field

Dynamic Modeling and Experimental Validation of an Impact-Driven Piezoelectric Energy Harvester in Magnetic Field

A theoretical investigation of a two-degree-of-freedom vibro-impact triboelectric energy harvester for larger bandwidth

Numerical simulation of double impact 2DOF triboelectric energy harvesting for extended bandwidth

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