The Theoretical Research about the Piezoelectric Materials Generating Capacity on Road

2013 ◽  
Vol 470 ◽  
pp. 807-813
Author(s):  
Li Rui ◽  
Yi Cheng Xiao ◽  
Jian Zhong Pei ◽  
Xiao Kang Zhao
Keyword(s):  
Piezoelectric Materials ◽  
Low Frequency ◽  
Structural Response ◽  
Middle Layer ◽  
Theoretical Research ◽  
Loading Frequency ◽  
Wheel Load ◽  
Piezoelectric Vibrator ◽  
Low Frequency Vibration ◽  
Generating Capacity

This article determine the wheel load on the role of piezoelectric vibrator in the way as the low-frequency vibration force through analyzing the wheel load, and the loading frequency is 10Hz;in this paper, combining with asphalt roadbed structural response, we get that the piezoelectric conversion device that between the above layer and the middle layer generate optimal performance adopting the theoretical calculation, a single piezoelectric vibrator can generate the electricity by a 2.62 mJ, what provides a theoretical support for the pavement performance of the piezoelectric material.

Design Optimization of Low Power and Low Frequency Vibration Based MEMS Energy Harvester

2013 ◽  
Vol 475-476 ◽  
pp. 1624-1628
Author(s):  
Hasnizah Aris ◽  
David Fitrio ◽  
Jack Singh
Keyword(s):  
Low Power ◽  
Energy Harvester ◽  
Piezoelectric Materials ◽  
Geometry Optimization ◽  
Low Frequency ◽  
Substrate Thickness ◽  
Power Harvesting ◽  
Low Frequency Vibration ◽  
Length Width ◽  
Development And Utilization

The development and utilization of different structural materials, optimization of the cantilever geometry and power harvesting circuit are the most commonly methods used to increase the power density of MEMS energy harvester. This paper discusses the cantilever geometry optimization process of low power and low frequency of bimorph MEMS energy harvester. Three piezoelectric materials, ZnO, AlN and PZT are deposited on top and bottom of the cantilever Si substrate. This study focuses on the optimization of the cantilevers length, width, substrate thickness and PZe thickness in order to achieve lower than 600 Hz of resonant frequency. The harvested power for this work is in the range of 0.02 ~ 194.49 nW.

The Structural Properties Research of Piezoelectric Cantilever Beam Based on Vehicular Environment

2014 ◽  
Vol 525 ◽  
pp. 342-345
Author(s):  
Yan Zhao ◽  
Shan Shan Liu ◽  
Yu Feng Li
Keyword(s):  
Cantilever Beam ◽  
Simulation Analysis ◽  
Low Frequency ◽  
Electrical Energy ◽  
Body Vibration ◽  
Low Frequency Vibration ◽  
Generating Capacity ◽  
Nature Frequency ◽  
Beam Parameters ◽  
Vibration Simulation

The piezoelectric power generating device can convert the vibration energy into electrical energy in vehicular environment. So it can provide energy for electronic components. Firstly, the mathematical model of road-vehicles-piezoelectric device coupled vibration was established under the random road excitation. Then vibration simulation analysis of the established model was made. The acceleration and spectrum of the vehicles body and its connection with the suspension were researched under B-class. The car body vibration is low-frequency vibration. Further studies shows that expanding the speed range and changing the roads level almost have no effect on the natural frequency of vehicles body vibration. Secondly, in order to make the maximum generating capacity, the influences of cantilever beam parameters have on its nature frequency were researched. The research results provide basis for parameters design in cantilever beam.

The Experiments of Cantilever Piezoelectric Vibrator Power Generation

2012 ◽  
Vol 236-237 ◽  
pp. 1368-1372
Author(s):  
Su Xiang Qian ◽  
Hong Sheng Hu ◽  
Li Xia Ge ◽  
Jia You Song
Keyword(s):  
Power Generation ◽  
Natural Frequency ◽  
Low Frequency ◽  
Experiment Research ◽  
Piezoelectric Vibrator ◽  
Piezoelectric Resonators ◽  
Low Frequency Vibration ◽  
Proper Mass

Papers on cantilever piezoelectric resonators experiment research in the low frequency vibration environment. The study proved that, to choose a proper mass can effectively regulate the cantilever piezoelectric vibrators natural frequency The more close to the incentive frequency and the natural frequency of piezoelectric vibrators, the better the results of piezoelectric vibrators power generation.

Design, Analysis, and Experimental Studies of a Novel PVDF-Based Piezoelectric Energy Harvester With Beating Mechanisms

2014 ◽  
Author(s):  
Kuo-Shen Chen
Keyword(s):  
Natural Frequency ◽  
Energy Harvester ◽  
Piezoelectric Materials ◽  
Low Frequency ◽  
Major Barrier ◽  
Energy Harvesters ◽  
Piezoelectric Energy ◽  
Low Frequency Vibration ◽  
High Efficient ◽  
The Future

Wireless sensor networks become increasingly important in modern life for structural health monitoring and other related applications. In these applications, due to their overall sensor populations and possible covered measurement areas, the replacement of batteries becomes a difficult and unrealistic task. As a result, energy harvesters to convert environment wasted vibration energy into electricity for powering those sensor nodes become important and many miniaturized device have been realized by using MEMS technology. In order to achieve optimal performance, the energy harvester must be operated at the resonance frequency. However, the vibration frequencies of environmental vibrations are usually much less than that of those miniaturizing energy harvesters and this fact could be a major barrier for energy harvesting performance. In this paper, a new piezoelectric energy scavenging concept is proposed and demonstrated to convert environmental vibrations into electricity. Unlike previous MEMS-based piezoelectric energy harvesters, which suffer from matching between environmental low frequency vibration and the much higher system natural frequency, this work proposes a novel beating design using polymer piezoelectric materials in collaborating with a beating mechanism. That is, by creating impact force via the low frequency vibration motion from the mechanism, it is possible to excite system natural frequency by the low frequency environmental vibrations and it is possible to operate the entire system at the natural frequency. This work contains details in presenting this idea, designing piezoelectric harvester systems with flexible PVDF elements, exploring their vibration characteristics, and energy accumulating strategies by using a capacitor with a full-bridged rectifiers or a boost conversion. By experimental characterization, the overall harvesting efficiency of the proposed design is much greater than that from the design without the beating mechanism. It indicates that the efficiency is significantly improved and the proposed translational design could potentially improve the future design approach for piezoelectric energy harvesters significantly. In summary, this preliminary study shows that it is a feasible scheme for the application of piezoelectric materials in harvesting electricity from environmental vibrations. Although this work is still in its initial phase, the results and conclusions of this work are still invaluable for guiding the development of high efficient piezoelectric harvesters in the future.

scholarly journals Dynamic research on a low-frequency vibration isolation system of quasi-zero stiffness

2019 ◽  
Vol 38 (2) ◽  
pp. 684-691
Author(s):  
M Jurevicius ◽  
V Vekteris ◽  
G Viselga ◽  
V Turla ◽  
A Kilikevicius ◽  
...  
Keyword(s):  
Dynamic Characteristics ◽  
Vibration Isolation ◽  
Acoustic Noise ◽  
Low Frequency ◽  
Experimental Tests ◽  
Theoretical Research ◽  
Isolation System ◽  
Vibration Isolation System ◽  
Low Frequency Vibration ◽  
Conditioning Equipment

The paper describes an establishment of dynamic characteristics of the newly created passive mechanical system for isolation of low-frequency (0.7 Hz–50 Hz) vibrations. The many metrological means are sensitive to mechanical vibrations and acoustic noise of low frequency. Such may appear both outside and inside a building, i.e. may be caused by wind, heating, aeration, air conditioning equipment, moving vehicles and other. In the paper, description of the theoretical and experimental tests is provided. The obtained dynamic characteristics (transmissibilities) of the passive mechanical low-frequency vibration isolation system show that such a system is able to isolate vibrations effectively in the frequency range of 0.7 Hz–50 Hz. The results of the experimental tests support the results of the theoretical research.

scholarly journals Dynamic Research on Low-Frequency Vibration Isolation Tables

2020 ◽  
Author(s):  
Mindaugas Jurevicius ◽  
Gintas Viselga ◽  
Vytautas Turla ◽  
Eugenijus Jurkonis ◽  
Ina Tetsman
Keyword(s):  
Dynamic Characteristics ◽  
Vibration Isolation ◽  
Dynamic Models ◽  
Low Frequency ◽  
Experimental Tests ◽  
Theoretical Research ◽  
Isolation System ◽  
Low Frequency Vibration ◽  
Resonance Frequencies ◽  
Isolation Systems

Abstract In the paper, an establishment of dynamic characteristics of tabletops of the newly-developed optical tables is being discussed upon. Low-frequency vibration isolation systems are reviewed. Theoretical and experimental tests have been performed. Dynamic models of an optical table on a vibrating platform at different excitations have been developed, the dynamic displacement and the resonance frequencies of the system have been established and vibration transmissibility curves have been presented. The obtained dynamic characteristics of the mechanical passive low-frequency vibration isolation system show that such a system is able to isolate the vibrations effectively. The results of the performed experimental tests confirm the data of the theoretical research.

scholarly journals Modeling and simulation for low-frequency vibration energy harvesting based on piezoelectric unimorph cantilever beam

2018 ◽  
Vol 208 ◽  
pp. 04003
Author(s):  
Binjie Song ◽  
Jianhai Yue ◽  
Zhunqing Hu
Keyword(s):  
Energy Harvester ◽  
Low Frequency ◽  
Mathematic Model ◽  
Vibration Energy Harvesting ◽  
Modal Frequency ◽  
First Order ◽  
Low Frequency Vibration ◽  
Generating Capacity ◽  
Piezoelectric Unimorph ◽  
Tip Mass

In order to solve the problem of sustainable energy supply for low-power electronic products used in low-frequency vibration environment, the mathematic model was established based on the theory of piezoelectricity and Euler-Bernoulli beam. Also, the effects of different parameters of PZT unimorph beams such as the length, width, and tip mass on generating capacity were studied by FEM. The results show that the energy harvester with PZT unimorph beam and tip mass is suitable for low-frequency vibration environment. Increasing the length or reducing the width of the beam can significantly lower the first-order modal frequency of energy harvester when other conditions remain the same. Within certain range, the first-order modal frequency of the beam also gradually reduced as the tip mass increasing. When the size of the PZT unimorph beam is 60x60x0.33mm, the tip mass is 8.92g and an exciting force of 0.01N is applied to it along z axis, an output of 8.1V can be obtained. Meanwhile, the PZT unimorph beam is under the first vibration mode and the resonant frequency is 16.296Hz.

A Study on the Fine Structure of the Lateral Line Organ of the Sea Eel

1973 ◽  
Vol 31 ◽  
pp. 648-649
Author(s):  
K. Hama
Keyword(s):  
Fine Structure ◽  
Electron Microscope ◽  
Lateral Line ◽  
Low Frequency ◽  
Sensory Cells ◽  
Apical Surface ◽  
Voltage Electron ◽  
Sensory Epithelia ◽  
Low Frequency Vibration ◽  
Transmission Electron

The lateral line organs of the sea eel consist of canal and pit organs which are different in function. The former is a low frequency vibration detector whereas the latter functions as an ion receptor as well as a mechano receptor.The fine structure of the sensory epithelia of both organs were studied by means of ordinary transmission electron microscope, high voltage electron microscope and of surface scanning electron microscope.The sensory cells of the canal organ are polarized in front-caudal direction and those of the pit organ are polarized in dorso-ventral direction. The sensory epithelia of both organs have thinner surface coats compared to the surrounding ordinary epithelial cells, which have very thick fuzzy coatings on the apical surface.

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