Piezoelectric energy harvester operated by noncontact mechanical frequency up-conversion using shell cantilever structure

Jang, Munseon; Song, Sang-Bin; Park, Yong‐Hee; Yun, Kwang-Seok

doi:10.7567/jjap.54.06fp08

Cited by 7 publications

(3 citation statements)

References 30 publications

(40 reference statements)

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“…Acoustic and thermal were also active during the mechanical impacts. Yun et al (Han and Yun, 2014; Jang et al, 2015; Jung and Yun, 2010) implemented the FUC effect by high impulse-like accelerations without physical contact; the harvesters provided the inertia impacting force to the high-resonance oscillators through the instantaneous state transition of a shell cantilever or a bucked bridge, but the fatigue life of the structures need to be designed to a very high standard. The magnetic coupling force can also been selected to generate the impulse-like acceleration without physical contact; Rastegar and Murray (2010), Wickenheiser and Garcia (2010), and Tang et al (2012) have already demonstrated this kind of energy harvesters.…”

Section: Introductionmentioning

confidence: 99%

An internal resonance based frequency up-converting energy harvester

Qiu

et al. 2018

Journal of Intelligent Material Systems and Structures

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Frequency up-converting vibration energy harvester can bridge the gap between high-frequency response and low-frequency input, greatly increasing the efficiency of energy conversion. This article proposed a novel frequency up-converting energy harvester based on 1:3 internal resonance in 2 degree-of-freedom cubic nonlinear systems. The harvester consists of two asymmetric cantilevers corresponding to two vibration degrees-of-freedom. The ratio of cantilevers’ first-order resonances is (or close to) 1:3. When excited frequency matches the resonant frequency of the first assisting cantilever, 1:3 internal resonance of the harvester system occurs, leading to drastic vibration of the second generating cantilever at its resonance. The generated voltage frequency is then three times increased. Finally, simulated and experimental results clearly proved this frequency up-converting principle. In addition, the resonant frequency tuning and wideband behaviors of the harvester were also investigated, which increased the viability of the proposed harvester under the practical environment vibrations.

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Section: Introductionmentioning

confidence: 99%

An internal resonance based frequency up-converting energy harvester

Qiu

et al. 2018

Journal of Intelligent Material Systems and Structures

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“…Either way, the low-frequency ambient vibration can be up-converted to the higher frequency vibration of the beams, which then improves harvesting efficiency. Frequency up-conversion can also be achieved without any physical impact or contact in PEH systems, for instance, through magnetic plucking [28][29][30] or using a cantilever shell structure [31]. Both of these configurations can generate an impact-like force or impulsive excitation which then increases the dominant response frequency of the cantilevers.…”

Section: Vibro-impact Systems In Energy Harvestingmentioning

confidence: 99%

Nonlinear dynamics and triboelectric energy harvesting from a three-degree-of-freedom vibro-impact oscillator

Ouyang

Davis

2018

Nonlinear Dyn

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A triboelectric energy harvester based on a three-degree-of-freedom vibro-impact oscillator is presented. Both the dynamic model of the oscillator and the theoretical model of the oscillator-based triboelectric energy harvester are established. The dynamic response and its effect on the electrical output are considered for various mass ratios and mass spacings. The study leads to the conclusions that the symmetric mass configurations of the oscillator are more beneficial to energy harvesting than the asymmetric cases. The extent of the initial spacing between the masses influences the dynamics of the system and the electrical output by triggering grazing bifurcation. High-order periodicity is found to accompany a reduction in the electrical power. An increase in mass ratio tends to increase the electrical output, and there may exist an optimal mass ratio at which the electrical output is maximized. Chatter and sticking motion can improve the output performance dramatically, while resonance, as usual, corresponds to large amplitude response, but these large amplitudes are not optimal for triboelectric energy harvesting, and thus the maximal output does not appear around resonance. This is different from other types of vibration-based energy harvesters, such as piezoelectric and magneto-

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“…Energy harvesting is considered as an alternative technology to overcome the issues of the current power supply source for wearable sensors [ 7 , 8 , 9 ]. An energy harvester utilizes various energy sources to generate electric power, including light [ 10 , 11 ], radio frequency [ 12 , 13 ], temperature difference [ 14 , 15 , 16 ], and mechanical energy [ 17 , 18 , 19 , 20 , 21 , 22 ]. Among them, mechanical energy is considered suitable for wearable applications because it is not influenced by environmental conditions such as weather and location.…”

Section: Introductionmentioning

confidence: 99%

Helical Piezoelectric Energy Harvester and Its Application to Energy Harvesting Garments

Kim

Yun

2017

Micromachines

Self Cite

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In this paper, we propose a helical piezoelectric energy harvester, examine its application to clothes in the form of an energy harvesting garment, and analyze its design and characteristics. The helical harvester is composed of an elastic core and a polymer piezoelectric strap twining the core. The fabricated harvester is highly elastic and can be stretched up to 158% of its initial length. Following the experiments using three different designs, the maximum output power is measured as 1.42 mW at a 3 MΩ load resistance and 1 Hz motional frequency. The proposed helical harvesters are applied at four positions of stretchable tight-fitting sportswear, namely shoulder, arm joint, knee, and hip. The maximum output voltage is measured as more than 20 V from the harvester at the knee position during intended body motions. In addition, electric power is also generated from this energy harvesting garment during daily human motions, which is about 3.9 V at the elbow, 3.1 V at the knee, and 4.4 V at the knee during push-up, walking, and squatting motions, respectively.

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Piezoelectric energy harvester operated by noncontact mechanical frequency up-conversion using shell cantilever structure

Cited by 7 publications

References 30 publications

An internal resonance based frequency up-converting energy harvester

An internal resonance based frequency up-converting energy harvester

Nonlinear dynamics and triboelectric energy harvesting from a three-degree-of-freedom vibro-impact oscillator

Helical Piezoelectric Energy Harvester and Its Application to Energy Harvesting Garments

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