scholarly journals A Liquid-Metal-Based Freestanding Triboelectric Generator for Low-Frequency and Multidirectional Vibration

2021 ◽  
Vol 8 ◽  
Author(s):  
Huaxia Deng ◽  
Zizheng Zhao ◽  
Chong Jiao ◽  
Jingchang Ye ◽  
Shiyu Zhao ◽  
...  
Keyword(s):  
Power Generation ◽  
Energy Harvesting ◽  
Liquid Metal ◽  
Low Frequency ◽  
Vibration Energy ◽  
Frequency Range ◽  
Vibration Energy Harvesting ◽  
Generation Mode ◽  
Vibrational Energies ◽  
Triboelectric Generator

There are a lot of vibrational energies, which are low frequency, multidirectional, and broadband, in the nature. This creates difficulties for devices that aim at harvesting vibration energy. Here, we present a liquid-metal-based freestanding triboelectric generator (LM-FTG) for vibration energy harvesting. In this device, the fluidity of liquid is used to increase sensitivity to vibration for better low-frequency response and multidirectional vibration energy harvesting capability. The freestanding power generation mode is able to increase power generation stability. Experiments show that the bandwidth of LM-FTG can almost cover the entire sweep frequency range, and a 10 μF capacitor can be charged to 6.46 V at 7.5 Hz in 60 s by LM-FTG. In particular, 100 LEDs are illuminated in the low-frequency environmental experiment successfully. The proposed LM-FTG can work in low frequency with large working bandwidth, which provides an effective method for energy harvesting of low-frequency and multidirectional vibrations.

Optimal Energy Harvesting From Impulse Trains Using Piezoelectric Transduction

2014 ◽  
Author(s):  
A. A. Kody ◽  
J. T. Scruggs
Keyword(s):  
Power Generation ◽  
Energy Harvesting ◽  
Low Frequency ◽  
Vibration Energy ◽  
Optimal Harvesting ◽  
Linear Quadratic ◽  
Vibration Energy Harvesting ◽  
Linear Quadratic Optimal Control ◽  
Vibration Energy Harvester ◽  
Harvesting Time

In applications of vibration energy harvesting to embedded wireless sensing, the available power and energy can be very low. This poses interesting challenges for technological feasibility if the parasitic losses in the electronics used to harvest this energy are prohibitive. In this study, we present a theory for the active control of power generation in energy harvesters in a manner which addresses and compensates for parasitic loss. We conduct the analysis in the context of a single-transducer piezoelectric bimorph cantilever beam subjected to a low-frequency impulse train. The power generation of the vibration energy harvester is maximized while considering mechanical losses, electrical losses, and the static power required to activate control intelligence and facilitate power-electronic conversion. It is shown that the optimal harvesting current can be determined through the use of linear quadratic optimal control techniques. The optimal harvesting time over which energy should be generated, following an impulse, is determined concurrently with the optimal feedback law. We show that this optimal harvesting time exhibits bifurcations as a function of the parameters characterizing the losses in the system.

scholarly journals Experiment Investigation of Bistable Vibration Energy Harvesting with Random Wave Environment

2021 ◽  
Vol 11 (9) ◽  
pp. 3868
Author(s):  
Qiong Wu ◽  
Hairui Zhang ◽  
Jie Lian ◽  
Wei Zhao ◽  
Shijie Zhou ◽  
...  
Keyword(s):  
Renewable Energy ◽  
Energy Harvesting ◽  
Cantilever Beam ◽  
Large Scale ◽  
Low Frequency ◽  
Vibration Energy ◽  
Random Wave ◽  
Periodic Signal ◽  
Vibration Energy Harvesting ◽  
Motion Activity

The energy harvested from the renewable energy has been attracting a great potential as a source of electricity for many years; however, several challenges still exist limiting output performance, such as the package and low frequency of the wave. Here, this paper proposed a bistable vibration system for harvesting low-frequency renewable energy, the bistable vibration model consisting of an inverted cantilever beam with a mass block at the tip in a random wave environment and also develop a vibration energy harvesting system with a piezoelectric element attached to the surface of a cantilever beam. The experiment was carried out by simulating the random wave environment using the experimental equipment. The experiment result showed a mass block’s response vibration was indeed changed from a single stable vibration to a bistable oscillation when a random wave signal and a periodic signal were co-excited. It was shown that stochastic resonance phenomena can be activated reliably using the proposed bistable motion system, and, correspondingly, large-scale bistable responses can be generated to realize effective amplitude enlargement after input signals are received. Furthermore, as an important design factor, the influence of periodic excitation signals on the large-scale bistable motion activity was carefully discussed, and a solid foundation was laid for further practical energy harvesting applications.

High-performance low-frequency bistable vibration energy harvesting plate with tip mass blocks

Energy ◽  
2019 ◽  
Vol 180 ◽  
pp. 737-750 ◽  
Author(s):  
Yi Li ◽  
Shengxi Zhou ◽  
Zhichun Yang ◽  
Tong Guo ◽  
Xutao Mei
Keyword(s):  
Energy Harvesting ◽  
High Performance ◽  
Low Frequency ◽  
Vibration Energy ◽  
Vibration Energy Harvesting ◽  
Tip Mass

A piezoelectric spring pendulum oscillator used for multi-directional and ultra-low frequency vibration energy harvesting

2018 ◽  
Vol 231 ◽  
pp. 600-614 ◽  
Author(s):  
Yipeng Wu ◽  
Jinhao Qiu ◽  
Shengpeng Zhou ◽  
Hongli Ji ◽  
Yang Chen ◽  
...  
Keyword(s):  
Energy Harvesting ◽  
Low Frequency ◽  
Vibration Energy ◽  
Vibration Energy Harvesting ◽  
Low Frequency Vibration

scholarly journals Vibration Bandgaps of Piezoelectric Metamaterial Plate with Local Resonators for Vibration Energy Harvesting

2019 ◽  
Vol 2019 ◽  
pp. 1-15 ◽  
Author(s):  
Zhongsheng Chen ◽  
Jing He ◽  
Gang Wang
Keyword(s):  
Energy Harvesting ◽  
Plate Theory ◽  
Ritz Method ◽  
Low Frequency ◽  
Structural Vibration ◽  
Vibration Energy ◽  
Vibration Energy Harvesting ◽  
Bottle Neck ◽  
Self Powered

Embedded wireless sensing networks (WSNs) provide effective solutions for structural health monitoring (SHM), where how to provide long-term electric power is a bottle-neck problem. Piezoelectric vibration energy harvesting (PVEH) has been widely studied to realize self-powered WSNs due to piezoelectric effect. Structural vibrations are usually variable and exist in the form of elastic waves, so cantilever-like harvesters are not appropriate. In this paper, one kind of two-dimensional (2D) piezoelectric metamaterial plates with local resonators (PMP-LR) is investigated for structural vibration energy harvesting. In order to achieve low-frequency and broadband PVEH in SHM, it is highly necessary to study dynamic characteristics of PMP-LR, particularly bandgaps. Firstly, an analytical model is developed based on the Kirchhoff plate theory, and modal analysis is done by using the Rayleigh–Ritz method. Then, effects of geometric and material parameters on vibration bandgaps are analyzed by finite element-based simulations. In the end, experiments are carried out to validate the simulated results. The results demonstrate that the location of bandgaps can be easily adjusted by the design of local resonators. Therefore, the proposed method will provide an effective tool for optimizing local resonators in PMP-LR.

A MEMS-Based Piezoelectric Power Generator for Low Frequency Vibration Energy Harvesting

2006 ◽  
Vol 23 (3) ◽  
pp. 732-734 ◽  
Author(s):  
Fang Hua-Bin ◽  
Liu Jing-Quan ◽  
Xu Zheng-Yi ◽  
Dong Lu ◽  
Chen Di ◽  
...  
Keyword(s):  
Energy Harvesting ◽  
Low Frequency ◽  
Vibration Energy ◽  
Vibration Energy Harvesting ◽  
Power Generator ◽  
Low Frequency Vibration

Hybrid nanogenerators for low frequency vibration energy harvesting and self-powered wireless locating

2018 ◽  
Vol 5 (1) ◽  
pp. 015510 ◽  
Author(s):  
Ying Yuan ◽  
Hulin Zhang ◽  
Jie Wang ◽  
Yuhang Xie ◽  
Saeed Ahmed Khan ◽  
...  
Keyword(s):  
Energy Harvesting ◽  
Low Frequency ◽  
Vibration Energy ◽  
Vibration Energy Harvesting ◽  
Low Frequency Vibration ◽  
Self Powered

Study of the Ambient Vibration Energy Harvesting Based on Piezoelectric Effect

2015 ◽  
Vol 14 (01n02) ◽  
pp. 1460017
Author(s):  
Hongyu Si ◽  
Jinlu Dong ◽  
Lei Chen ◽  
Laizhi Sun ◽  
Xiaodong Zhang ◽  
...  
Keyword(s):  
Power Generation ◽  
Energy Harvesting ◽  
Resonant Frequency ◽  
Output Power ◽  
Ambient Vibration ◽  
Vibration Energy ◽  
Vibration Source ◽  
Vibration Energy Harvesting ◽  
Parallel Connection ◽  
Piezoelectric Vibrator

The resonance between piezoelectric vibrator and the vibration source is the key to maximize the ambient vibration energy harvesting by using piezoelectric generator. In this paper, the factors that influence the output power of a single piezoelectric vibrator are analyzed. The effect of geometry size (length, thickness, width of piezoelectric chip and thickness of metal shim) of a single cantilever piezoelectric vibrator to the output power is analyzed and simulated with the help of MATLAB (matrix laboratory). The curves that output power varies with geometry size are obtained when the displacement and load at the free end are constant. Then the paper points out multi-resonant frequency piezoelectric power generation, including cantilever multi-resonant frequency piezoelectric power generation and disc type multi-resonant frequency piezoelectric generation. Multi-resonant frequency of cantilever piezoelectric power generation can be realized by placing different quality mass at the free end, while disc type multi-resonant frequency piezoelectric generation can be realized through series and parallel connection of piezoelectric vibrator.

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