A Multimode Relayed Piezoelectric Cantilever for Effective Vibration Energy Harvesting

Li, Chuan; Hong, Daewoong; Kwon, Kwang‐Ho; Jeong, Jaehwa

doi:10.7567/jjap.52.050202

Cited by 10 publications

(7 citation statements)

References 24 publications

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“…Piezoelectric energy harvesting is a typical method of converting external mechanical vibration into electrical energy. Several considerations have been proposed for piezoelectric generators [6][7][8] to enhance the mechanical-to-electric energy conversion. Most cases are classified into either the mechanical impedance matching of a piezoelectric device with an external vibration source, or the electrical impedance matching between a piezoelectric device and a rectifier-storage circuit.…”

Section: Introductionmentioning

confidence: 99%

Properties of Car-Embedded Vibrating Type Piezoelectric Harvesting System

Koo¹,

Shin²,

Lím³

et al. 2021

Applied Sciences

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We investigated the harvesting performance of a double piezoelectric generator, which was embedded into the engine block of a small passenger car. The resonance frequency is approximately between 37 and 52 Hz, where the cantilever showed maximum displacement. In reality, the cantilever has a vibrating characteristic, which dramatically reduces displacement, even when the operating frequency deviates slightly from the resonance frequency. To acquire a large mechanical energy-to-electrical energy conversion, a multiple-piezoelectric generator was employed to absorb the energy even when the vibration switched from a resonance to a non-resonance frequency. In this study, a variable mass box was designed and installed in the engine block of a car. The variable mass box consisted of the serial connection of two masses with different weights. The operating frequency deviated from a resonance to a non-resonance frequency within a few hertz (3~4 Hz); the reduction in vibration was lower, leading to a significant acquisition of the resulting power. This is due to the variable matching of the generator, realized by the action of dual mass. This type of generator was installed in the engine block and produced up to 0.038 and 0.357 mW when the engine was operating at 2200 and 3200 rpm, respectively.

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Section: Introductionmentioning

confidence: 99%

Properties of Car-Embedded Vibrating Type Piezoelectric Harvesting System

Koo¹,

Shin²,

Lím³

et al. 2021

Applied Sciences

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“…Strong mechanical coupling produces a higher power output than the sum of two independent devices from a low frequency random vibration sources. A piezoelectric cantilever with an eccentrically connected linear relay is proposed by Li [35]. The experimental results show that more power can be generated with the proposed structure over a wider bandwidth than the conventional structure.…”

Section: Introductionmentioning

confidence: 99%

Investigation on the design and application of 3-dimensional wide-band piezoelectric energy harvester for low amplitude vibration sources

Chen

Wei

et al. 2019

Smart Mater. Struct.

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In order to realize 3-dimensional, wide-band vibration energy harvesting in low-frequency and low-amplitude environments, a multi-layer Z-type beam piezoelectric harvester structure is proposed. Nonlinear mass and instabilities of horizontal and longitudinal are introduced by the multi-layer Z-type beam structure. Simulation and experiment results show that when the number of beam layer is 7 and excitation intensity is 0.8 g, there are more than 4 voltage peaks within 5–40 Hz, the maximum voltage is above 16 V, the maximum output power can reach 180 μW, which greatly widens harvesting frequency band. When exciting in horizontal and vertical directions, the maximum voltages peaks are all above 10 V, the number of voltage peaks are all above 5, maximum output powers can reach 108 μW and 53 μW respectively, by which 3-dimensional energy harvesting is verified. Next, the performances of arrays are studied. When the arrays number is 12, excitation intensity reduces to 0.2 g, nearly 90% of the voltage response amplitudes for parallel arrays within 15–40 Hz are above 4 V, almost all the voltage response amplitudes for series arrays are above 5 V within 17–40 Hz, even response amplitudes are all above 10 V within 23–33 Hz. The maximum output power generated by parallel arrays is up to 864.5 μW. So, wide-band 3-dimensional vibration energy harvesting for low amplitude environment is realized by multi-layer Z-type vibration energy harvester. Finally, the feasibility that wireless switch could be powered by the multi-layer Z-type vibration energy harvester parallel arrays from low-frequency and low-amplitude environment is verified.

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“…Both vibration-type and impact-type piezoelectric energy harvesting requires constant vibration or impact from ambient energy sources. However, ambient energy sources usually do not provide constant vibrations or impacts, but they provide irregular and sudden vibration or impact from natural energy sources such as wind [15,16], human movement [17,18], and ambient vibration [19][20][21][22][23][24][25][26][27][28][29][30].…”

Section: Introductionmentioning

confidence: 99%

Study on improving current generating time of piezoelectric energy harvesting system

et al. 2014

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This study combined a ceramic, metal alloy, and polymer in a piezoelectric energy harvesting system. The proper container film for curing the urethane rubber was determined to be a Si-coated polyester film. Furthermore, a technique was developed to embed a piezoelectric energy system in urethane rubber (soft and hard); the resulting effects on the output voltage generation of this system were experimentally determined. Comparing the uncoated and hard urethane rubber-coated systems, the latter system improved the energy generation time by a factor of 50 by restricting the recovery time of the metal alloy and storing applied mechanical energy in urethane rubber, providing more time for the piezoelectric ceramic to generate output current. From the LED lighting test results, the urethane rubber coating increased the usable voltage generating time from 0.05 s to 2.5 s. The improved generating time is useful for piezoelectric energy harvesting systems with irregular ambient energy sources.

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A Multimode Relayed Piezoelectric Cantilever for Effective Vibration Energy Harvesting

Cited by 10 publications

References 24 publications

Properties of Car-Embedded Vibrating Type Piezoelectric Harvesting System

Properties of Car-Embedded Vibrating Type Piezoelectric Harvesting System

Investigation on the design and application of 3-dimensional wide-band piezoelectric energy harvester for low amplitude vibration sources

Study on improving current generating time of piezoelectric energy harvesting system

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