Semi-analytical model of an acoustic black hole piezoelectric bimorph cantilever for energy harvesting

2021 ◽  
Vol 494 ◽  
pp. 115790
Author(s):  
Jie Deng ◽  
Oriol Guasch ◽  
Ling Zheng ◽  
Tingting Song ◽  
Yanshu Cao
Keyword(s):  
Black Hole ◽  
Energy Harvesting ◽  
Analytical Model ◽  
Piezoelectric Bimorph

scholarly journals Modeling and Experiment of a V-Shaped Piezoelectric Energy Harvester

2018 ◽  
Vol 2018 ◽  
pp. 1-15 ◽  
Author(s):  
Yue Zhao ◽  
Yi Qin ◽  
Lei Guo ◽  
Baoping Tang
Keyword(s):  
Energy Harvesting ◽  
Frequency Band ◽  
Electromechanical Coupling ◽  
Energy Harvester ◽  
Structural Parameters ◽  
Ambient Vibration ◽  
Piezoelectric Bimorph ◽  
Actual Structure ◽  
Piezoelectric Energy ◽  
Operation Frequency

Vibration-based energy harvesting technology is the most promising method to solve the problems of self-powered wireless sensor nodes, but most of the vibration-based energy harvesters have a rather narrow operation bandwidth and the operation frequency band is not convenient to adjust when the ambient frequency changes. Since the ambient vibration may be broadband and changeable, a novel V-shaped vibration energy harvester based on the conventional piezoelectric bimorph cantilevered structure is proposed, which successfully improves the energy harvesting efficiency and provides a way to adjust the operation frequency band of the energy harvester conveniently. The electromechanical coupling equations are established by using Euler-Bernoulli equation and piezoelectric equation, and then the coupled circuit equation is derived based on the series connected piezoelectric cantilevers and Kirchhoff's laws. With the above equations, the output performances of V-shaped structure under different structural parameters and load resistances are simulated and discussed. Finally, by changing the angle θ between two piezoelectric bimorph beams and the load resistance, various comprehensive experiments are carried out to test the performance of this V-shaped energy harvester under the same excitation. The experimental results show that the V-shaped energy harvester can not only improve the frequency response characteristic and the output performance of the electrical energy, but also conveniently tune the operation bandwidth; thus it has great application potential in actual structure health monitoring under variable working condition.

Broad-Band Vibro-Impacting Energy Harvester

2010 ◽  
Vol 654-656 ◽  
pp. 2799-2802 ◽  
Author(s):  
Scott D. Moss ◽  
Ian Powlesland ◽  
Michael Konak ◽  
Alex Barry ◽  
Steve C. Galea ◽  
...  
Keyword(s):  
Energy Harvesting ◽  
Energy Harvester ◽  
Vibration Spectrum ◽  
Broad Band ◽  
Critical Issue ◽  
Piezoelectric Bimorph ◽  
Aircraft Structure ◽  
Frequency Agile ◽  
Periodic Replacement ◽  
Random Band

The certification of retro-fitted structural health monitoring (SHM) systems for use on aircraft raises a number of challenges. One critical issue is determining the optimal means of supplying power to these systems, given that access to the existing aircraft power-system is likely to be problematic. Other conventional options such as primary cells can be difficult to certify and would need periodic replacement, which in an aircraft context would pose a serious maintenance issue. Previously, the DSTO has shown that a structural-strain based energy harvesting approach can be used to power a device for SHM of aircraft structures. Acceleration-based energy harvesting from airframes is more demanding (than a strain based approach) since the vibration spectrum of an aircraft structure varies dynamically with flight conditions, and hence a frequency agile or (relatively) broad-band device is often required to maximize the energy harvested. This paper reports on the development of a prototype vibro-impacting energy harvester with a ~59 gram flying mass and two piezoelectric bimorph-stops. Over the frequency range 29-41 Hz using a continuous-sine 450 milli-g r.m.s. excitation, the harvester delivers an average of 5.1 mW. From a random band-passed 25-45 Hz excitation with r.m.s. 450 milli-g, the average harvester output is 1.7 mW.

Applications of Vibration-Based Energy Harvesting (VEH) Devices

2017 ◽  
pp. 989-1014
Author(s):  
Ooi Beng Lee ◽  
Thein Chung Ket ◽  
Yew Chun Keat ◽  
A. Rashid A. Aziz
Keyword(s):  
Energy Harvesting ◽  
Analytical Model ◽  
Electronic Devices ◽  
Modern Society ◽  
Vibration Energy ◽  
Vibration Energy Harvester ◽  
Mechanical Transducer ◽  
Alternative Power ◽  
Electronic Technologies ◽  
Electronic Sensors

This chapter reviews present usage of vibration-based energy harvesting (VEH) devices and applications. The evolution of energy resources and advance in electronic technologies has resulting the need of self-sustainable wireless/portable electronic devices in current modern society. Batteries are non-beneficial in the miniaturization process of electronic designing and alternative power supplies are desperately needed to fill in the falling behind technologies gap to drive the advance of the wireless/portable development further. VEH mechanism is suggested in this chapter as the solution for the bottleneck. Various consideration of creating an optimal vibration energy harvester are suggested through an analytical model of a mechanical transducer. Useful applications and usages of VEH are presented and some suggestion for improvement are also given. Lastly, the trend of energy harvesting is annotated and commented in-line with the demand of electronic sensors market.

Optimizing Design of Piezoelectric Trimorph, as Positioning Element and Energy Harvesting Device

2015 ◽  
Vol 772 ◽  
pp. 125-129
Author(s):  
Cristian Necula ◽  
C. Daniel Comeagă ◽  
Octavian Donţu
Keyword(s):  
Energy Harvesting ◽  
Analytical Model ◽  
Composite Structure ◽  
Electronic Devices ◽  
Piezoelectric Composite ◽  
Fea Model ◽  
Environmental Friendly ◽  
Optimizing Design ◽  
Feasible Option ◽  
Mems Device

In future, demand on portable electronic devices will create the requirements of enduring recharged sources of power. A non-environmental friendly conventional battery with limited lifetimes has no longer feasible option. One of the mostly used solution is the piezoelectric composite structure with sensing and also actuating capabilities, mainly as a MEMS device. The optimum between actuating and energy harvesting functions is difficult to obtain. The article is presenting a study regarding the posibility to optimize both functions, performed using an analytical model and also by simulation using a FEA model.

A Miniature Energy Harvesting Device Using Martensite Variant Reorientation

2013 ◽  
Vol 738-739 ◽  
pp. 411-415 ◽  
Author(s):  
Manfred Kohl ◽  
Rui Zhi Yin ◽  
Viktor Pinneker ◽  
Yossi Ezer ◽  
Alexei Sozinov
Keyword(s):  
Magnetic Field ◽  
Energy Harvesting ◽  
Magnetic Flux ◽  
Output Voltage ◽  
Permanent Magnets ◽  
Magnetic Circuit ◽  
Compressive Loading ◽  
Piezoelectric Bimorph ◽  
Martensite Variant ◽  
Cyclic Motion

This paper presents a miniature energy harvesting device that makes use of stress-induced cyclic martensite variant reorientation in a Ni-Mn-Ga single crystal of 0.3x2x2 mm³ size. The stress- and magnetic field-induced reorientation is investigated for single crystalline Ni50.2Mn28.4Ga21.4 specimens of 0.3 mm thickness that are cut along the (100) direction and subjected to uniaxial compressive loading. A demonstrator is presented consisting of a FSMA specimen placed in the gap of a magnetic circuit to guide and enhance the field of biasing permanent magnets. The cyclic motion of a piezoelectric bimorph actuator is used to mechanically load the FSMA specimen. The corresponding change of magnetic flux induces an electrical voltage in a pick-up coil (N=2000 turns). The effects of biasing magnetic field, strain amplitude and strain velocity are investigated. An optimum magnetic field of 0.4 T exists, where the output voltage reaches 120 mV at a strain velocity of 0.006 ms-1.

Evaluation of Analytical and Finite Element Modeling on Coupled Field Dynamics of Piezoelectric Cantilever Bimorph Harvester

2013 ◽  
Vol 284-287 ◽  
pp. 1846-1850 ◽  
Author(s):  
Long Zhang ◽  
Keith A. Williams ◽  
Zheng Chao Xie
Keyword(s):  
Finite Element ◽  
Energy Harvesting ◽  
Analytical Model ◽  
Electrical Potential ◽  
Open Circuit ◽  
Experimental Result ◽  
Fe Model ◽  
Portable Electronics ◽  
Coupled Field ◽  
Tip Displacement

As the portable electronics and wireless sensors continue to be minimized in size and power consumption, the energy harvesting from the surrounding environment has become a potential major or supplementary power source for those devices. As an energy harvesting option for converting the mechanical vibrations to the electrical energy, the structure-electricity field coupled piezoelectric materials have relatively high conversion efficiency, light weight and small size, making them preferable for wireless sensor networks and portable electronics. In this paper, the modeling work on coupled field dynamics of the piezoelectric cantilevered bimorph (PCB) energy harvester is presented, in terms of structure tip displacement and open-circuit electrical potential generated through harmonic excitation. First, a single degree of freedom (SDOF) analytical model is presented for predicting the tip displacement of the PCB structure, and then a finite element (FE) model is created to simulate the tip displacement and open-circuit voltage of the PCB structure. Then, both the analytical and finite element models are compared against the laboratory experimental results. The comparison shows that the FE model has a better agreement with the experimental result than the analytical model. Based on the evaluation, these two models could be adopted as design tools in different cases.

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