An Autoparametric, Electromagnetic Ambient Vibration Energy Harvester

2011 ◽  
Author(s):  
Johannes Santen ◽  
Nitin Kapania ◽  
Christopher Lee
Keyword(s):  
Energy Harvester ◽  
Ambient Vibration ◽  
Vibration Energy ◽  
Vibration Energy Harvester

Trends of MEMS-Based Vibration Energy Harvester

2013 ◽  
Vol 562-565 ◽  
pp. 1251-1256
Author(s):  
Bing Mo ◽  
Rong Hai Huang ◽  
Rui Min Huang ◽  
Chao Dong Ling ◽  
Huo Zhou
Keyword(s):  
Wireless Sensor Networks ◽  
Power Management ◽  
Energy Harvester ◽  
Ambient Vibration ◽  
Wireless Sensor ◽  
Vibration Energy ◽  
Vibration Energy Harvester ◽  
Prospective Development ◽  
Energy Harvesters ◽  
Micro Vibration

Micro vibration energy harvesters have received much attention due to their potential application of low power wireless sensor networks and embedded systems. This paper studies three mechanisms to scavenge the ambient vibration energy, discusses the power management circuit and the application of the converter, investigates the prospective development and ongoing challenges in MEMS-based vibration energy harvester.

A Self-Sufficient and Frequency Tunable Piezoelectric Vibration Energy Harvester

2016 ◽  
Vol 139 (1) ◽  
Author(s):  
Cevat Volkan Karadag ◽  
Nezih Topaloglu
Keyword(s):  
Energy Demand ◽  
Energy Harvester ◽  
Electrical Power ◽  
Control Unit ◽  
Ambient Vibration ◽  
Vibration Energy ◽  
Vibration Energy Harvester ◽  
Piezoelectric Cantilever ◽  
Wide Range ◽  
Piezoelectric Vibration

In this paper, a novel smart vibration energy harvester (VEH) is presented. The harvester automatically adjusts its natural frequency to stay in resonance with ambient vibration. The proposed harvester consists of two piezoelectric cantilever beams, a tiny piezomotor with a movable mass attached to one of the beams, a control unit, and electronics. Thanks to its self-locking feature, the piezomotor does not require energy to fix its movable part, resulting in an improvement in overall energy demand. The operation of the system is optimized in order to maximize the energy efficiency. At each predefined interval, the control unit wakes up, calculates the phase difference between two beams, and if necessary, actuates the piezomotor to move its mass in the appropriate direction. It is shown that the proposed tuning algorithm successfully increases the fractional bandwidth of the harvester from 4% to 10%. The system is able to deliver 83.4% of the total harvested power into usable electrical power, while the piezomotor uses only 2.4% of the harvested power. The presented efficient, autotunable, and self-sufficient harvester is built using off-the-shelf components and it can be easily modified for wide range of applications.

scholarly journals Design, Analysis and Finite Element Modeling of Macro Fiber Composite Piezoelectric Materials

2020 ◽  
Vol 2 (2) ◽  
pp. 24
Keyword(s):  
Finite Element ◽  
Energy Harvester ◽  
Piezoelectric Materials ◽  
Fiber Composite ◽  
Electrical Response ◽  
Element Model ◽  
Ambient Vibration ◽  
Vibration Energy ◽  
Response Analysis ◽  
Vibration Energy Harvester

Vibration energy harvester has been paid a lot of attention by many researchers to transforming ambient vibration into electrical energy, which is normally utilized to develop wireless electronic sectors. The paper presents a finite element model (FEM) of a vibration energy harvester consisting of a bimorph electromechanical system (MEMS) generator. The model is used to simulate, and compare, the mechanical characteristics and electrical response of piezoelectric material results between the cantilever beam structure formed by laminating two piezoelectric layers on both sides of a Carbon fiber reinforced polymer (CFRP) substrate and Ti-6Al-4V substrate using ANSYS®19 R1. A set of numerical simulations has been carried out, and the results show that the comparisons of the harmonic response analysis seen change between the different substrates based on the bimorph piezoelectric MEMS generator.

A Curled Piezoelectric Cantilever for Two Dimensional Vibration Energy Harvesting

2013 ◽  
Vol 811 ◽  
pp. 469-473
Author(s):  
Xue Feng He ◽  
Yao Qing Cheng ◽  
Jun Gao ◽  
You Zhu
Keyword(s):  
Energy Harvester ◽  
Proof Mass ◽  
Ambient Vibration ◽  
Vibration Energy ◽  
Two Dimensional ◽  
Vibration Energy Harvesting ◽  
Vibration Direction ◽  
Vibration Energy Harvester ◽  
Piezoelectric Cantilever ◽  
Scavenging Efficiency

To harvest ambient vibration energy of different directions, a micromachined vibration energy harvester which can harvest two-dimensional vibration energy was proposed. The harvester is composed of a curled piezoelectric cantilever, a proof mass and the substrate. One end of the cantilever is fixed onto the substrate and the other end is connected with a proof mass. It is the residual stress of micromachining processes that causes the cantilever to curl. A proof-of-concept prototype of the two-dimensional vibration energy harvester was assembled and tested to evaluate the performance. Experimental results show that the vibration direction with the highest energy scavenging efficiency changed with the frequency of the ambient vibration. The vibration energy of any direction in the neutral plane of the curled cantilever can be harvested by using the first two natural vibration modes of the prototype.

Simply supported FPEDs connected by springs for broadband energy harvesting

2020 ◽  
Vol 64 (1-4) ◽  
pp. 201-210
Author(s):  
Yoshikazu Tanaka ◽  
Satoru Odake ◽  
Jun Miyake ◽  
Hidemi Mutsuda ◽  
Atanas A. Popov ◽  
...  
Keyword(s):  
Energy Harvesting ◽  
Evaluation Method ◽  
Energy Harvester ◽  
Vibrational Energy ◽  
Functional Materials ◽  
Vibration Energy ◽  
Theoretical Evaluation ◽  
Vibration Energy Harvester ◽  
Polyvinylidene Difluoride ◽  
Simply Supported

Energy harvesting methods that use functional materials have attracted interest because they can take advantage of an abundant but underutilized energy source. Most vibration energy harvester designs operate most effectively around their resonant frequency. However, in practice, the frequency band for ambient vibrational energy is typically broad. The development of technologies for broadband energy harvesting is therefore desirable. The authors previously proposed an energy harvester, called a flexible piezoelectric device (FPED), that consists of a piezoelectric film (polyvinylidene difluoride) and a soft material, such as silicon rubber or polyethylene terephthalate. The authors also proposed a system based on FPEDs for broadband energy harvesting. The system consisted of cantilevered FPEDs, with each FPED connected via a spring. Simply supported FPEDs also have potential for broadband energy harvesting, and here, a theoretical evaluation method is proposed for such a system. Experiments are conducted to validate the derived model.

Hybrid Vibration Energy Harvester based on Stochastic Resonance

2018 ◽  
Vol 138 (5) ◽  
pp. 185-190
Author(s):  
Meng Su ◽  
Dai Kobayashi ◽  
Nobuyuki Takama ◽  
Beomjoon Kim
Keyword(s):  
Stochastic Resonance ◽  
Energy Harvester ◽  
Vibration Energy ◽  
Vibration Energy Harvester
Sign in / Sign up

Export Citation Format

Share Document