Uniform stress distribution road piezoelectric generator with free-fixed-end type central strike mechanism

Hong, Seong Do; Ahn, Jung Hwan; Kim, Kyung-Bum; Kim, Jeong Hun; Cho, Jae Yong; Woo, Min Sik; Song, Yewon; Hwang, Wonseop; Jeon, Deok Hwan; Kim, Jihoon; Jeong, Seo Young; Woo, Sang Bum; Ryu, Chul Hee; Song, Yooseob; Sung, Tae Hyun

doi:10.1016/j.energy.2021.121812

Cited by 15 publications

(6 citation statements)

References 22 publications

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“…where V P is the single-layer piezoelectric ceramics volume, E 3 is the electric field intensity, D 3 is the electric charge displacement, and ε s 33 is the dielectric constant of the constant strain type. The second term on the right of equation ( 4) was used to explain the PZT potential energy, and this term was the also used to express the change of harvester electric energy in equation (8).…”

Section: Theoretical Modelmentioning

confidence: 99%

“…As a promising solution for power supply, sensors powered by the energy harvested from environment could be placed in a wider range with less dependency of power grid and batteries [4][5][6]. The environmental energy, such as solar and wind energy, could provide a sustainable and abundant power; hence, the evaluation of energy harvesters has attracted great attention over decades [7,8].…”

Section: Introductionmentioning

confidence: 99%

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A piezoelectric energy harvester with a hybrid nonlinearity of bluff body and magnet repulsion in low threshold wind speed for power supply

He,

Hou,

Liu

et al. 2023

Smart Mater. Struct.

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The environment contains several substantial energies, such as low-speed wind, which can be harvested to power sensors for environment monitoring, data collection, etc. As a promising solution, a piezoelectric energy harvester with hybrid nonlinearity for low threshold wind speed and practical wind speed range is introduced in this paper. Because of the hybrid nonlinearity of bluff body and magnet, the symmetrically shaped bluff body can induce a greater cantilever deformation, and a stronger repulsion generates a higher swing frequency of the cantilever. Moreover, the dual lead zirconate titanate plate enhances the utilization efficiency of the magnet repulsion. The hybrid nonlinearity is studied in theoretical models, numerical simulations, and experiments. The harvester outputs a noticeable voltage at 2.5 m s−1. The highest output peak-to-peak voltage and power came to 33.72 VP–P, 0.346 mW in 5.5 m s−1, 800 kΩ. The application experiments also demonstrate the feasibility and stability of the harvester by powering LEDs and sensors, which enable sensors to be placed in a wider range with high stability for environment monitoring.

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Section: Theoretical Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A piezoelectric energy harvester with a hybrid nonlinearity of bluff body and magnet repulsion in low threshold wind speed for power supply

He,

Hou,

Liu

et al. 2023

Smart Mater. Struct.

View full text Add to dashboard Cite

show abstract

“…In piezoelectric mode, the mechanical structure transmits the targeted vertical displacement and applies stress/strain to piezoelectric materials, which then correspondingly generate electric energy and release it to external loads. When the input displacement is directly applied to a piezoelectric element without extra modulation, the large output power can only come from inputting higher displacement or using multiple piezoelectric sets [ 18 , 19 , 20 ]. Similar to the electromagnetic mode, some assisted components, e.g., lever and force amplifier, also involve enlarging the force/defamation on a piezoelectric element to promote the harvesting performance [ 21 , 22 , 23 ].…”

Section: Introductionmentioning

confidence: 99%

A Pavement Piezoelectric Energy Harvester for Small Input Displacements

et al. 2023

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In order to collect mechanical energy from human motions on pavement without an obvious disturbance, a piezoelectric harvester for small displacement is proposed. A seesaw mechanism is utilized to transmit the pressure displacement to piezoelectric beams. Benefitting from the superiority of used axially deformed beams, the designed scheme can produce a higher voltage than the ones based on the conventional bending cantilever. Favorable electrical energy is achieved by the manufactured prototype under a displacement lower than 1 mm. Two practical applications, including charging a capacitor and powering an environmental sensing node, demonstrate the feasibility of this energy harvester in supplying power for engineering devices. The proposed device shows a favorable capacity to capture energy from humans walking on pavements. Also, this category of axially deformed beam could provide ideas for developing piezoelectric harvesters under small displacements.

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“…Recent research has progressed to in situ measurements. On-site installation and evaluative experiments were carried out by embedding PEHs in roadways (Chen et al, 2021; Hong et al, 2022; Li et al, 2021; Wang et al, 2021) using suitable packing methods (Wang et al, 2019; Zhang et al, 2019), and the harvested energy was proved to be enough to power electronics include temperature sensors and wireless data transmission devices (Hwang et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

Optimal lateral embedded position of piezoelectric energy harvesters under various traffic conditions with wheel-path distribution

Zhang,

Lai,

Zhang

et al. 2023

Journal of Intelligent Material Systems and Structures

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Piezoelectric energy harvesting from traffic load has gained extensive attention for potentiality as a renewable energy source. In existing in situ experiments, generally only one vehicle is employed, while the wheel-path of the vehicle and embedded positions of piezoelectric energy harvester (PEH) units are both fixed. However, in an actual traffic condition, vehicles travel randomly along width of pavements, which means the wheel-path varies over time and among vehicles. In this study, an electromechanical model is established for the PEH units under actual traffic conditions with wheel-path distribution, and is validated with finite element analysis and experiments. Then the electrical performance of PEH units embedded at various locations along pavements’ lateral direction is investigated under various traffic speeds. It is found that the optimal lateral embedded locations of the PEH units should be adjusted according to the prescribed traffic speed of the roads. Specifically, PEH units should be embedded at the tire-road contact areas for road with low traffic speeds (<15 m/s), while they should be embedded at the center of the pavement with high traffic speeds (>25 m/s). These mathematical results may serve as guidelines for selecting optimal lateral embedded locations for PEH units embedded in pavements.

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Uniform stress distribution road piezoelectric generator with free-fixed-end type central strike mechanism

Cited by 15 publications

References 22 publications

A piezoelectric energy harvester with a hybrid nonlinearity of bluff body and magnet repulsion in low threshold wind speed for power supply

A piezoelectric energy harvester with a hybrid nonlinearity of bluff body and magnet repulsion in low threshold wind speed for power supply

A Pavement Piezoelectric Energy Harvester for Small Input Displacements

Optimal lateral embedded position of piezoelectric energy harvesters under various traffic conditions with wheel-path distribution

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