A new Tapered-L shaped springs based MEMS piezoelectric vibration energy harvester designed for small rolling bearing fault detection

Debnath, Bapi; Kumar, R.

doi:10.1007/s00542-020-04783-z

Cited by 13 publications

(5 citation statements)

References 28 publications

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“…The first bending resonant frequency of the nanogenerator is obtained by substituting Equations (3) and (4) into Equation (5). Table 1 depicts the geometric parameters of the different layers of the nanogenerator used in the analytical model.…”

Section: Designmentioning

confidence: 99%

“…Additionally, these batteries have short operating times that interrupt the supply of electrical energy to the devices. In order to substitute these batteries, the micro and nanogenerators can be employed to obtain electrical energy from ambient vibrations or mechanical motions such as vehicles vibrations, human body motions, buildings vibrations, water wave motions, and wind sources [ 2 , 3 , 4 , 5 , 6 , 7 , 8 , 9 , 10 , 11 ]. These micro and nanogenerators can use different transduction mechanisms: electromagnetic, electrostatic, triboelectric, thermoelectric or piezoelectric [ 12 , 13 , 14 , 15 , 16 , 17 , 18 , 19 , 20 , 21 , 22 , 23 , 24 , 25 ].…”

Section: Introductionmentioning

confidence: 99%

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Electromechanical Modeling of Vibration-Based Piezoelectric Nanogenerator with Multilayered Cross-Section for Low-Power Consumption Devices

et al. 2020

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Piezoelectric nanogenerators can convert energy from ambient vibrations into electrical energy. In the future, these nanogenerators could substitute conventional electrochemical batteries to supply electrical energy to consumer electronics. The optimal design of nanogenerators is fundamental in order to achieve their best electromechanical behavior. We present the analytical electromechanical modeling of a vibration-based piezoelectric nanogenerator composed of a double-clamped beam with five multilayered cross-sections. This nanogenerator design has a central seismic mass (910 μm thickness) and substrate (125 μm thickness) of polyethylene terephthalate (PET) as well as a zinc oxide film (100 nm thickness) at the bottom of each end. The zinc oxide (ZnO) films have two aluminum electrodes (100 nm thickness) through which the generated electrical energy is extracted. The analytical electromechanical modeling is based on the Rayleigh method, Euler–Bernoulli beam theory and Macaulay method. In addition, finite element method (FEM) models are developed to estimate the electromechanical behavior of the nanogenerator. These FEM models consider air damping at atmospheric pressure and optimum load resistance. The analytical modeling results agree well with respect to those of FEM models. For applications under accelerations in y-direction of 2.50 m/s2 and an optimal load resistance of 32,458 Ω, the maximum output power and output power density of the nanogenerator at resonance (119.9 Hz) are 50.44 μW and 82.36 W/m3, respectively. This nanogenerator could be used to convert the ambient mechanical vibrations into electrical energy and supply low-power consumption devices.

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Section: Designmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Electromechanical Modeling of Vibration-Based Piezoelectric Nanogenerator with Multilayered Cross-Section for Low-Power Consumption Devices

et al. 2020

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“…The harvester could generate an output power of 0.07 mW under a stochastic excitation level of 0.0041 g 2 Hz −1 . Debnath and Kumar [26] examined a novel tapered L-shaped springbased piezoelectric vibration energy harvester, and the maximum power output of the device was 177.49 nW at 0.25 g.…”

Section: Introductionmentioning

confidence: 99%

A broadband zigzag-shaped energy harvester for both wind energy and vibration energy: modeling and experimental verification

Pan

Zhang

Qin

et al. 2023

J. Phys. D: Appl. Phys.

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In this work, for the wind energy and vibration energy in practical environment, a novel zigzag-shaped energy harvester is proposed to harvest them simultaneously. This harvester is constituted of an inclined beam and a horizontal beam with a bluff body fixed at the free end. The inclined beam is covered by a piezoelectric patch. The vibration induced by wind flow and base excitation could produce electric energy through the piezoelectric material and realize energy harvesting. Especially, the softening characteristic created by magnetic interaction can extend the working bandwidth. The dynamical coupling equations are derived, and corresponding simulations are carried out, the results show that the cubic bluff body can help increase the wind-induced energy harvesting. The responses obtained under the base excitation combined with wind flow demonstrate that the hybrid excitation can provide a significant enhancement to the non-resonance region. The related validation experiments are carried out. The experimental results have a good agreement with the numerical results. Compared with the conventional base excitation or wind flow excitation, the output power obtained under hybrid excitation increases 106% and 206% respectively.

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“…compact size, reliable performance, and low production costs [2]. As elastic elements in microelectromechanical system, planar micro springs play a pivotal role in microsensors, micro-actuators, energy harvesters [3], micro-accelerometers, micro-inertial switches, and micro-gyroscopes [4].…”

Section: Introductionmentioning

confidence: 99%

Effects of rolled fibrous microstructure on fatigue properties of extruded Cu-5Al planar micro springs

Li,

Wang,

et al. 2023

J. Micromech. Microeng.

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Planar micro spring is an important elastic component in microelectromechanical system devices, and one of its main failures is fatigue. In this work, a new method to improve the cycles of a planar micro spring by introducing pre-rolled fibrous microstructure was proposed. Cu-5Al alloy billets with a fibrous microstructure rolled at room temperature with a reduction ratio of 70% were obtained. Three types of planar micro springs with fibrous microstructure were prepared through extrusion by varying the angle between the fibrous microstructure direction and the extrusion direction. Fatigue tests were conducted using a customized micro-fatigue test system. The best fatigue performance was obtained by preparing the micro springs with the fibrous microstructure direction perpendicular to the extrusion direction, while the worst fatigue performance was obtained by preparing the planar micro springs with the fibrous microstructure direction parallel to the extrusion direction. The fibrous microstructure direction affected the local strain in the micro springs. The fibrous microstructure slightly affected the location of the crack initiation region but significantly affected the area of crack initiation and steady-state expansion region of the micro spring. The fatigue life cycle of extruded Cu-5Al alloy planar micro spring with the pre-rolled fibrous microstructure improved by 58% more than that of extruded Cu-7Al alloy planar micro spring without the pre-rolled fibrous microstructure. Micro spring fatigue life cycle decreased with increasing strain amplitude. This work provides a new approach for preparing planar micro springs with high fatigue performance.

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A new Tapered-L shaped springs based MEMS piezoelectric vibration energy harvester designed for small rolling bearing fault detection

Cited by 13 publications

References 28 publications

Electromechanical Modeling of Vibration-Based Piezoelectric Nanogenerator with Multilayered Cross-Section for Low-Power Consumption Devices

Electromechanical Modeling of Vibration-Based Piezoelectric Nanogenerator with Multilayered Cross-Section for Low-Power Consumption Devices

A broadband zigzag-shaped energy harvester for both wind energy and vibration energy: modeling and experimental verification

Effects of rolled fibrous microstructure on fatigue properties of extruded Cu-5Al planar micro springs

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