PVDF energy harvester on flexible rings

Hu, Shun-di; Chuang, Kuo-Chih; Tzou, H. S.

doi:10.1109/spawda.2010.5744283

Cited by 6 publications

(3 citation statements)

References 19 publications

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“…The thin patch can be regarded as a capacitor. The electric energy induced in the patch can be defined as [6] ( ) …”

Section: Voltage and Energy Equationsmentioning

confidence: 99%

“…Non-zero curvature configurations used as the substructures have not been extensively investigated. Hu et al [6] studied a PVDF energy harvester using a ring model. Cylindrical panel, as a common structure, laminated with piezoelectric patches as sensor/actuator have been studied by Tzou et al [7,8], which provides appropriate references for energy harvesting.…”

Section: Introductionmentioning

confidence: 99%

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Energy analysis of a piezoelectric patch laminated on cylindrical panels subjected to harmonic line loadings

Wang

Rao

Tzou

2011

2011 Symposium on Piezoelectricity, Acoustic Waves and Device Applications (SPAWDA)

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In order to transform the vibration energy into electric energy, piezoelectric materials are often used due to their properties. This paper proposes an energy analysis model of cylindrical panels laminated with piezoelectric patch. With simply supported boundary condition at four sides, panels are excited by harmonic line loadings in transverse direction. Love & Kirchhoff thin shell theory and electromechanical equations are used to derive the voltage across the surface area of the piezoelectric patch. Considering the thin thickness of piezoelectric patch, its capacitance can be estimated by utilizing the formula of plate capacitor. Consequently, the energies can be presented with the equations only containing variables of capacitance and voltage. In case study, effect of the line loading location is firstly studied. The results show that the optimal position of longitudinal line loading is related to circumferential mode number, while it's only related to longitudinal mode number for circumferential line loading. The effect of the cylindrical panel curvature is also discussed afterward.

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“…The thin patch can be regarded as a capacitor. The electric energy induced in the patch can be defined as [6] ( ) …”

Section: Voltage and Energy Equationsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Energy analysis of a piezoelectric patch laminated on cylindrical panels subjected to harmonic line loadings

Wang

Rao

Tzou

2011

2011 Symposium on Piezoelectricity, Acoustic Waves and Device Applications (SPAWDA)

Self Cite

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“…The dynamic characteristics of free-floating ring have been well studied in the past. Some researches have studies the energy harvesting of circular rings in open circuit state [8][9][10][11]. However, the electromechanical coupling and energy harvesting on circular rings with the close-loop circuit still need further developments.…”

Section: Introductionmentioning

confidence: 99%

Electromechanical coupling and energy harvesting of circular rings

Zhang¹,

Hu²,

Tzou³

2011

2011 Symposium on Piezoelectricity, Acoustic Waves and Device Applications (SPAWDA)

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Ring shell structures often exhibit oscillatory behaviors during their operations. It is a crucial challenge to extract vibration energy, which is always wasted, to convert to useful electric energy. In this study, the concept of energy harvesting based on a circular ring laminated with a piezoelectric patch is established to achieve this purpose. The electrical device is assumed to be an equivalent resistance in the close-loop circuit as a simplified energy harvesting system. Due to the direct piezoelectric effect, the electromechanical coupling mechanism of the energy harvesting system is analyzed. Then, the electric power on the resistance is obtained. Case studies with respect to different system parameters, such as the equivalent resistance, excitation frequency, and the ring size, are conducted to optimize the modal power. Results show that the maximal modal power output is related to the equivalent resistance, the excitation frequency, as well as the ring radius. The optimal modal parameters are evaluated to maximize the energy harvesting effectiveness and provide a design guideline of ring-type energy harvesters for practical applications.

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Energy harvesting from flexible piezoelectric ring

Kim¹,

Song²,

Song³

et al. 2019

Smart Mater. Struct.

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Herein, we investigated the feasibility of a flexible ring type energy harvester for a cylindrical shape change similar to that in a bent human finger. We fabricated a ring type energy harvester using a piezoelectric material, polyvinylidene fluoride, on a polydimethylsiloxane substrate. We modeled a human finger using a silicone cylinder to mimic the movement of a real human finger and measured the power harvested from its shape change under compression. A series of experiments were conducted under two different conditions, namely the variations in the radius of the cylinder and input frequency. Furthermore, we experimentally and theoretically assessed the output power and analyzed the harvested power as a function of the load resistance. We observed that the maximum harvested power level is of the order of hundreds of nanowatts.

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PVDF energy harvester on flexible rings

Cited by 6 publications

References 19 publications

Energy analysis of a piezoelectric patch laminated on cylindrical panels subjected to harmonic line loadings

Energy analysis of a piezoelectric patch laminated on cylindrical panels subjected to harmonic line loadings

Electromechanical coupling and energy harvesting of circular rings

Energy harvesting from flexible piezoelectric ring

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