Design and Experimental Investigation of an Ultra-Low Frequency, Low-Intensity, and Multidirectional Piezoelectric Energy Harvester with Liquid as the Energy-Capture Medium

Li, Ning; Yang, Fan; Luo, Tao; Qin, Lifeng

doi:10.3390/mi14020369

Cited by 3 publications

(2 citation statements)

References 32 publications

(29 reference statements)

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“…It has been proved that a quarter-circular arc piezoelectric beam can harvest vibration energy in three directions [ 29 ]. Based on the conventional cantilever–pendulum approach, Qin’s group used liquid as the energy-capturing medium to simultaneously achieve ultralow frequency, low intensity and multidirectional energy harvesting [ 30 , 31 ]. The liquid was stirred using horizontal or vertical vibrations, and the induced waves were sensed by the floater–lever array to bend the piezoelectric beam.…”

Section: Introductionmentioning

confidence: 99%

Multidirectional Piezoelectric Vibration Energy Harvester Based on Cam Rotor Mechanism

et al. 2023

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The techniques that harvest mechanical energy from low-frequency, multidirectional environmental vibrations have been considered a promising strategy to implement a sustainable power source for wireless sensor networks and the Internet of Things. However, the obvious inconsistency in the output voltage and operating frequency among different directions may bring a hindrance to energy management. To address this issue, this paper reports a cam-rotor-based approach for a multidirectional piezoelectric vibration energy harvester. The cam rotor can transform vertical excitation into a reciprocating circular motion, producing a dynamic centrifugal acceleration to excite the piezoelectric beam. The same beam group is utilized when harvesting vertical and horizontal vibrations. Therefore, the proposed harvester reveals similar characterization in its resonant frequency and output voltage at different working directions. The structure design and modeling, device prototyping and experimental validation are conducted. The results show that the proposed harvester can produce a peak voltage of up to 42.4 V under a 0.2 g acceleration with a favorable power of 0.52 mW, and the resonant frequency for each operating direction is stable at around 3.7 Hz. Practical applications in lighting up LEDs and powering a WSN system demonstrate the promising potential of the proposed approach in capturing energy from ambient vibrations to construct self-powered engineering systems for structural health monitoring, environmental measuring, etc.

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Section: Introductionmentioning

confidence: 99%

Multidirectional Piezoelectric Vibration Energy Harvester Based on Cam Rotor Mechanism

et al. 2023

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“…Other research has suggested the use of ferrofluids not as the transduction element but as a lubricant in solid magnet energy harvesters [ 19 ]. Other types of liquid-type energy harvesting devices utilize thermal gradients [ 20 ], which serve as an indirect way of vibration energy harvesting using various types of thermo-mechanical principles such as pyroelectric [ 21 ] and piezoelectric [ 22 ] effects. Utilizing mechanical vibrations from thermal gradients has been recently explored by Wang et al, which looks at developing an analytical model for electromagnetic induction in pulsating ferrofluid pipe flows [ 23 ], which has been validated against experimental data collected by Monroe et al [ 24 ].…”

Section: Introductionmentioning

confidence: 99%

Liquid Vibration Energy Harvesting Device Using Ferrofluids

Hannon,

Harrison,

Kraśny

et al. 2023

Micromachines

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Mechanical vibrations can be effectively converted into electrical energy using a liquid type of energy harvesting device comprised of a ferrofluid and a permanent magnet-inductor coil assembly. Compared to solid vibration energy harvesting devices, the liquid nature of the ferrofluid overcomes space conformity limitations which allow for the utilization of a wider range of previously inaccessible mechanical vibration energy sources for electricity generation and sensing. This report describes the design and the governing equations for the proposed liquid vibration energy harvesting device and demonstrates vibration energy harvesting at frequencies of up to 33 Hz while generating up to 1.1 mV. The proposed design can continuously convert mechanical into electrical energy for direct discharge or accumulation and storage of electrical energy.

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Analysis of output characteristics of positive feedback piezoelectric energy harvester based on nonlinear magnetic coupling

Shi,

Chen,

et al. 2024

Review of Scientific Instruments

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In light of the limitations of the current piezoelectric energy harvesters and the demand for self-power supply in wireless sensor nodes, a novel positive feedback piezoelectric energy harvester based on nonlinear magnetic coupling is proposed. The operational characteristics of this energy harvester are investigated from three perspectives: theory, simulation, and experiment. First, a nonlinear electromechanical coupling mathematical model that describes the dynamic response of the energy harvester system is established by combining the Hamilton variational principle with the piezoelectric theory. This provides a theoretical foundation for subsequent research. Second, finite element method simulations are employed to optimize the structural parameters of the energy harvester and study the impact of nonlinear magnetic force on its output performance. Finally, an experimental prototype is fabricated and an experimental test system is constructed to validate the designed positive feedback piezoelectric energy harvester. The results demonstrate that changes in the longitudinal beam angle have minimal effect on energy capture efficiency. By appropriately increasing the bending surface length, reducing initial magnetic moment, and augmenting mass block weight, wider working frequency bands and higher power generation capacity can be achieved when vibrating in low-energy orbits. The experimental findings align closely with theoretical design values and contribute to advancing broadband multi-directional piezoelectric energy harvesting technology in order to provide high-performance vibration-based power solutions for wireless applications.

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Design and Experimental Investigation of an Ultra-Low Frequency, Low-Intensity, and Multidirectional Piezoelectric Energy Harvester with Liquid as the Energy-Capture Medium

Cited by 3 publications

References 32 publications

Multidirectional Piezoelectric Vibration Energy Harvester Based on Cam Rotor Mechanism

Multidirectional Piezoelectric Vibration Energy Harvester Based on Cam Rotor Mechanism

Liquid Vibration Energy Harvesting Device Using Ferrofluids

Analysis of output characteristics of positive feedback piezoelectric energy harvester based on nonlinear magnetic coupling

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