scholarly journals Energy Harvesting from Piezoelectric Cantilever Beam with Different Shapes

2019 ◽  
Vol 8 (4) ◽  
pp. 6332-6337
Keyword(s):  
Energy Harvesting ◽  
Cantilever Beam ◽  
Energy Harvester ◽  
Mechanical Vibration ◽  
Power Source ◽  
Microelectronic Devices ◽  
Piezoelectric Energy ◽  
Piezoelectric Cantilever ◽  
Different Shapes ◽  
Continuous Power

This paper reviews the piezoelectric energy harvesting from mechanical vibration. The recent development in the microelectronic devices and wireless sensor networks (WSNs) requires continuous power source for better performance. Many researchers have been done to develop a permanent portable power source for microelectronic devices. Micro energy harvesting (MEH) consists of two basic elements; freely available energy and transducer. Energy is everywhere around us in different forms. The energy conversion ability of piezoelectric energy harvester is high among different MEH techniques. A cantilever type piezoelectric energy harvester under different shapes is mostly studied in the last few years. The output of piezoelectric harvester depends upon the deflection produced, more deflection led to more electrical output. The deflection in cantilever beam under different shapes is different. This review paper presents a comparison of different piezoelectric cantilever beam shapes and output generated analyzed in the last decade.

scholarly journals Experimental Research on Wind-Induced Flag-Swing Piezoelectric Energy Harvesters

2021 ◽  
Vol 2021 ◽  
pp. 1-8
Author(s):  
Jianjun Liu ◽  
Xianghua Chen ◽  
Yujie Chen ◽  
Hong Zuo ◽  
Qun Li
Keyword(s):  
Energy Harvesting ◽  
Cantilever Beam ◽  
Wind Field ◽  
Electromechanical Coupling ◽  
Energy Harvester ◽  
Coupling Effect ◽  
Green Energy ◽  
External Resistance ◽  
Piezoelectric Energy ◽  
Piezoelectric Cantilever

Piezoelectric cantilever beams, which have simple structures and excellent mechanical/electrical coupling characteristics, are widely applied in energy harvesting. When the piezoelectric cantilever beam is in a wind field, we should consider not only the influence of the wind field on piezoelectric beam but also the electromechanical coupling effect on it. In this paper, we design and test a wind-induced flag-swing piezoelectric energy harvester (PEH). The piezoelectric cantilever beam may vibrate in the wind field by affixing a flexible ribbon to the free end as the windward structure. To fulfill the goal of producing electricity, the flexible ribbon can swing the piezoelectric cantilever in a wind-induced unstable condition. The experimental findings demonstrate that the flag-swing PEH performs well in energy harvesting when the wind field is excited. When the wind speed is 15 m/s, the peak-to-peak output AC voltage may reach 13.88 V. In addition, the voltage at both ends of the closed-loop circuit’s external resistance is examined. The maximum electric power of the PEH may reach 43.4 μW with an external resistance of 650 kΩ. After passing through the AC-DC conversion circuit, the flag-swing PEH has a steady DC voltage output of 1.67 V. The proposed energy harvester transforms wind energy from a wind farm into electrical energy for supply to low-power electronic devices, allowing for the creation and use of green energy to efficiently address the issue of inadequate energy.

Synchronization of Cantilevers Arranged in Line of a Piezoelectric Energy Harvester

2015 ◽  
Author(s):  
Max Spornraft ◽  
Norbert Schwesinger ◽  
Shlomo Berger
Keyword(s):  
Energy Harvesting ◽  
Bluff Body ◽  
Energy Harvester ◽  
Phase Synchronization ◽  
Vibrational Excitation ◽  
Line Energy ◽  
Mechanical Coupling ◽  
Piezoelectric Energy ◽  
Piezoelectric Cantilever ◽  
The Right

Synchronization opens further ways to improve cantilever-based energy harvesting arrays in view of power output, easier rectification and scaling. Objective of this study is to investigate the synchronization behavior of a cantilever-array based energy harvesting systems. Thereby, synchronization is achieved by mechanical coupling through a so-called “overhang”. Nakajima et al. [1] and Wang et al. [2] already verified this principle for the synchronization of two and three cantilevers, but at constant vibrational excitation. Regarding energy harvesting, no application of this method is presently available. In this paper, we investigate the synchronization behavior of a piezoelectric cantilever-line energy harvester in airflow. The design of the energy harvester bases upon a piezoelectric cantilever-line and a common bluff body, arranged upstream. To investigate synchronization of the cantilevers, three commonly available piezoelectric bimorphs were employed to study synchronization. Mounted on a common bluff body, the effect of overhang material and position was studied. Therefore, different constellations were examined by impulse excitation as well as vortex-induced vibration in a wind channel. In several measurements, we found arrangements and parameters allowing for an in-phase synchronization of neighborly cantilevers of the line. The knowledge gained allows for a direct electrical connection of piezoelectric cantilevers with just one single rectifier unit. Cantilevers coupled with overhangs arranged in the right order oscillate with the same frequency and phase, i.e. without any charge cancellations. This knowledge opens ways to develop basic design rules for the synchronization of cantilevers.

scholarly journals A Review on Piezoelectric Energy Harvesting: Materials, Methods, and Circuits

2019 ◽  
Vol 4 (1) ◽  
pp. 3-39 ◽  
Author(s):  
Shashank Priya ◽  
Hyun-Cheol Song ◽  
Yuan Zhou ◽  
Ronnie Varghese ◽  
Anuj Chopra ◽  
...  
Keyword(s):  
Energy Harvesting ◽  
Power Management ◽  
Energy Harvester ◽  
Piezoelectric Materials ◽  
Low Frequency ◽  
Small Scale ◽  
Piezoelectric Energy Harvesting ◽  
Wide Bandwidth ◽  
Piezoelectric Energy ◽  
Continuous Power

Abstract Piezoelectric microelectromechanical systems (PiezoMEMS) are attractive for developing next generation self-powered microsystems. PiezoMEMS promises to eliminate the costly assembly for microsensors/microsystems and provide various mechanisms for recharging the batteries, thereby, moving us closer towards batteryless wireless sensors systems and networks. In order to achieve practical implementation of this technology, a fully assembled energy harvester on the order of a quarter size dollar coin (diameter=24.26 mm, thickness=1.75 mm) should be able to generate about 100 μW continuous power from low frequency ambient vibrations (below 100 Hz). This paper reviews the state-of-the-art in microscale piezoelectric energy harvesting, summarizing key metrics such as power density and bandwidth of reported structures at low frequency input. This paper also describes the recent advancements in piezoelectric materials and resonator structures. Epitaxial growth and grain texturing of piezoelectric materials is being developed to achieve much higher energy conversion efficiency. For embedded medical systems, lead-free piezoelectric thin films are being developed and MEMS processes for these new classes of materials are being investigated. Non-linear resonating beams for wide bandwidth resonance are also reviewed as they would enable wide bandwidth and low frequency operation of energy harvesters. Particle/granule spray deposition techniques such as aerosol-deposition (AD) and granule spray in vacuum (GSV) are being matured to realize the meso-scale structures in a rapid manner. Another important element of an energy harvester is a power management circuit, which should maximize the net energy harvested. Towards this objective, it is essential for the power management circuit of a small-scale energy harvester to dissipate minimal power, and thus it requires special circuit design techniques and a simple maximum power point tracking scheme. Overall, the progress made by the research and industrial community has brought the energy harvesting technology closer to the practical applications in near future.

scholarly journals A novel two-degrees-of-freedom piezoelectric energy harvester

2012 ◽  
Vol 24 (3) ◽  
pp. 357-368 ◽  
Author(s):  
Hao Wu ◽  
Lihua Tang ◽  
Yaowen Yang ◽  
Chee Kiong Soh
Keyword(s):  
Energy Harvesting ◽  
Cantilever Beam ◽  
Degrees Of Freedom ◽  
Energy Harvester ◽  
Response Level ◽  
Resonant Frequencies ◽  
Promising Alternative ◽  
Piezoelectric Energy ◽  
Cantilevered Beam ◽  
Compact Design

Energy harvesting from ambient vibrations using piezoelectric effect is a promising alternative solution for powering small electronics such as wireless sensors. A conventional piezoelectric energy harvester usually consists of a cantilevered beam with a proof mass at its free end. For such a device, the second resonance of the piezoelectric energy harvester is usually ignored because of its high frequency as well as low response level compared to the first resonance. Hence, only the first mode has been frequently exploited for energy harvesting in the reported literature. In this article, a novel compact piezoelectric energy harvester using two vibration modes has been developed. The harvester comprises one main cantilever beam and an inner secondary cantilever beam, each of which is bonded with piezoelectric transducers. By varying the proof masses, the first two resonant frequencies of the harvester can be tuned close enough to achieve useful wide bandwidth. Meanwhile, this compact design efficiently utilizes the cantilever beam by generating significant power output from both the main and secondary beams. An experiment and simulation were carried out to validate the design concept. The results show that the proposed novel piezoelectric energy harvester is more adaptive and functional in practical vibrational circumstances.

Nonlinear Dynamics of a Special Piezoelectric Energy Harvester With a Special Bistable Piezoelectric Cantilever Beam

2018 ◽  
Author(s):  
Ming Hui Yao ◽  
Wei Xia ◽  
Wei Zhang ◽  
Jian Yu Jiao
Keyword(s):  
Permanent Magnet ◽  
Cantilever Beam ◽  
Piezoelectric Layer ◽  
Magnetic Force ◽  
Energy Harvester ◽  
Excitation Frequency ◽  
High Energy ◽  
Nonlinear Phenomenon ◽  
Piezoelectric Energy ◽  
Piezoelectric Cantilever

This paper presents a special piezoelectric energy harvester system which is obtained by separating the end of the upper piezoelectric layer of the traditional piezoelectric cantilever beam from its basic layer. A mass I is located at the end of the separated upper piezoelectric layer (SUPL), a mass II and a permanent magnet I are located at the end of the separated lower piezoelectric beam (SLPB) and a permanent magnet II is added in the opposite position of the permanent magnet I and they face each other with same polarities. A nonlinear magnetic force which can broaden the frequency bandwidth of the system is generated mutually on the two permanent magnets. Studies find that this special piezoelectric energy harvester has extremely high energy capture efficiency. In order to further explore the reason of high efficiency, experimental research on its dynamic behavior is carried out. The experimental results show that the vibrations of the SUPL and the SLPB are relatively simple. The dynamic behaviors of the SUPL, the SLPB and the unseparated part are different. The unseparated part of the piezoelectric shows relatively complex nonlinear phenomenon due to the interaction of nonlinear magnetic force and the collision. With the increase of the external excitation frequency, period doubling motion and almost periodic motion appear alternately.

scholarly journals Design optimization of piezoelectric energy harvesting cantilever for medical devices

2019 ◽  
Vol 15 (4) ◽  
Author(s):  
Mariem Saida ◽  
Ghada Zaibi ◽  
Mounir Samet ◽  
Abdennaceur Kachouri
Keyword(s):  
Energy Harvesting ◽  
Human Body ◽  
Low Frequencies ◽  
Piezoelectric Energy ◽  
Biomedical Systems ◽  
Efficient Performance ◽  
Piezoelectric Cantilever ◽  
Promising Solution ◽  
Different Shapes ◽  
Materials Used

Energy harvesting from the human body is considered as an effective solution for powering biomedical systems. In particular, the piezoelectric energy recovery from mechanical vibrations of the human body represents the most promising solution. The harvested power depends on several factors such as the geometry, the size and materials used for the piezoelectric cantilever. In addition, the reduction and the change of the design of the piezoelectric system constitute a process for increasing the output power. In the present paper, the conventional rectangular shape of the piezoelectric energy harvester is studied and different shapes of cantilever are investigated. We introduced thus a triangular and a new shaped cantilever which permits the enhancement of the scavenged power for low frequencies. In addition, simulations result of various structures are compared and performed by employing finite element method (FEM). Simulations results show that the proposed form generates an electric power of 145 µW at resonant frequency of 8.5 Hz. This novel shape provides more efficient performance compared to other designs.

Study on the Energy Harvesting Performance of PE Cantilever Beam

2015 ◽  
Vol 645-646 ◽  
pp. 1189-1194
Author(s):  
Hai Peng Liu ◽  
Shi Qiao Gao ◽  
Lei Jin
Keyword(s):  
Energy Harvesting ◽  
Theoretical Analysis ◽  
Cantilever Beam ◽  
Mechanical Energy ◽  
Experimental System ◽  
Open Circuit ◽  
Ambient Vibration ◽  
Piezoelectric Energy ◽  
Harvesting Technique ◽  
Piezoelectric Cantilever

Harvesting ambient vibration energy through piezoelectric (PE) means is a popular energy harvesting technique. The merit of applying PE means to supply energy for microelectronic devices is that they can reduce the battery weight and possibly make the device self-powered by harvesting mechanical energy. This investigation will examine the energy generating performance of miniature PE cantilever beam through theoretical modeling, simulation and experiment testing. Through the theoretical analysis of the piezoelectric energy harvesting structure, the expression of open circuit voltage output is obtained. Using ANSYS software, the working performance of piezoelectric cantilever beam is analyzed. On the basis of theoretical analysis and simulation optimization, a set of experimental system is established to test the energy harvesting performance of the piezoelectric cantilever beam. The testing result shows that the harvested energy by the piezoelectric cantilever beam could supply electrical power to some micro electrical devices.

Flow Driven Vibration Energy Harvester

2010 ◽  
Author(s):  
Enrico Bischur ◽  
Sebastian Pobering ◽  
Markus Menacher ◽  
Norbert Schwesinger
Keyword(s):  
Energy Harvesting ◽  
Vibration Frequency ◽  
Energy Harvester ◽  
Mechanical Vibration ◽  
Vibration Energy ◽  
Vibration Energy Harvesting ◽  
Vibration Energy Harvester ◽  
Macroscopic Models ◽  
Piezoelectric Cantilever ◽  
Working Principle

This paper describes an energy harvester working with the repeated deflection of a piezoelectric cantilever. The harvester works in flowing media like wind or water. The bending of the cantilever is driven by vortices traveling across it. The presented device is an easy solution for vibration energy harvesting without the need of external mechanical vibration. The working principle was determined with macroscopic models in wind and water channels. The harvester does not need in general a mechanical adaption to the external vibration frequency, because it oscillates always with its resonance frequency at different flow velocities. Furthermore a self synchronization of cantilevers arranged beside each other could be observed in water. A second system was able to supply a load of approximatly 2 mW in a wind channel at a flow velocity of 8 m/s.

Study of a piezoelectric switching circuit for energy harvesting with bistable broadband technique by work-cycle analysis

2012 ◽  
Vol 24 (2) ◽  
pp. 180-193 ◽  
Author(s):  
Yu-Yin Chen ◽  
Dejan Vasic ◽  
Yuan-Ping Liu ◽  
François Costa
Keyword(s):  
Energy Harvesting ◽  
Cantilever Beam ◽  
Power Flow ◽  
Energy Harvester ◽  
Interface Circuit ◽  
Available Bandwidth ◽  
Piezoelectric Energy ◽  
Work Cycle ◽  
Coupled Structures ◽  
Synchronized Switching

In this article, a piezoelectric energy harvesting device comprises a bistable vibrating cantilever beam and a switching-type interface circuit (synchronized switching harvesting on an inductor) is proposed, and the resulting performance is compared to the traditional linear technique. It was known that the synchronized switching techniques increase efficiently the output power of the piezoelectric energy harvester for low-coupled structures. However, the traditional piezoelectric energy harvester based on a cantilever beam is only efficient at resonance. To broaden the available bandwidth, a bistable nonlinear technique was proposed. In this article, the bistable technique and synchronized switching harvesting on an inductor interface are combined together to accomplish a more efficient broadband piezoelectric energy harvester. The power flow and work cycles are adopted to simplify the analysis of the switching techniques and then summarize the increasing performance of the nonlinear piezoelectric harvester. Finally, simulation results and experimental validations show that the proposed integrated device owns larger bandwidth and collects more harvested energy.

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