Dissertation > Excellent graduate degree dissertation topics show

Research on Vibration Energy Harvester Based on Piezoelectric Cantilever

Author: WangQingPing
Tutor: JiangShengLin
School: Huazhong University of Science and Technology
Course: Software Engineering
Keywords: Piezoelectric ceramics Vibration energy Piezoelectric cantilever Modelling theory ANSYS finite element anlysis Energy harvesting circuit
CLC: TM919
Type: Master's thesis
Year: 2010
Downloads: 265
Quote: 5
Read: Download Dissertation

Abstract


With the development of wireless sensor network technology and portable devices, the power supply via the battery becomes one of the bottlenecks. In order to achieve finite lifetime of self-powered systems, the desiderating thing is to provide electric energy for such devices and networks by utilizing the vibration energy from the ambient environment. Converting vibration energy into electric energy by piezoelectric materials attracts more and more attention and becomes the hot point in micropower field. However, the problems are that the modeling theory needs to be further investgated, the structures of the piezoelectric energy harvester are ought to be improved because of the small output voltage and optimizing the harvesting circuits and storage devices are much in demand.According to the above problems, this dissertation first investgated the development trend of the piezoelectric vibration energy harvesting at home and abroad, and then anylized the types of the piezoelectric materials, the structures of the devices, the vibration mode and harvesting circuits and strorage devices and compared the merits and shortcoming of the different parts of structures and harvesting circuits, finally, proposed the research content of piezoelectric vibration energy harvester.Based on Hamilton’s principle, this dissertation studied the vibration equations and electric traits of the piezoelectric unimorph cantilever, and then made a quantitative analysis on the output energy and load power of the piezoelectric unimorph cantilever.According the above study results, the static and dynamic analysis of the piezoelectric unimorph cantilever through ANSYS finite element software are presented. In static analysis, the geometric parameters of piezoelectric ceramic and substrate influcing the output voltage are investigated in detail which establishes a solid theory foundation for optimizing the devices, while in dynamic analysis the resonant frequencies and eigemodes of the piezoelectric unimorph cantilever and its harmonic analysis are also presented, which provides an efficient instruction for the after testing and analysis.This dissertation built a testing system for piezoelectric energy harvesting based on the above research, and tested and compared through simulation the size structure of piezoelectric unimorph catilever influcing the output voltage and achieved indentical results,the energy generator with a beam dimension about 50 mm×20 mm×0.5mm and the piezoelectric unimorph dimension about 10 mm×10 mm×0.4mm produced 11V pp, 34uW with the optimal resistive load of 470KΩfrom 1g (1g = 9.81m / s2) at its resonant frequency of 34Hz , and then made a comparison on conventional capacitor, supercapacitor and rechargeable battery. In addition, the structures of the devices were improved and the piezoelectric bimorph cantilever and muiltlayer structures were desighed, respectively. The energy generator with a beam dimension about 50 mm×20 mm×0.5mm and the piezoelectric bimorph in parallel dimension about 10 mm×10 mm×0.4mm produced 16.97V pp, 76.5uW with the optimal resistive load of 470KΩfrom 1g at its resonant frequency of 33Hz , this result showed that, compared with the piezoelectric unimorph cantilever, the piezoelectric bimorph cantilever could improve the output voltage and power, while the muiltilayer structures could increase the output current and energy. This provides an application prospect of power supply for wireless sensor networks and portable devices.In the end, the works of this dissertation are sunnarized briefly, and the next work is figured out, including the novel reseach ideas.

Related Dissertations

  1. Diameter twisted hybrid ultrasonic motor,TM359.9
  2. Study on Vibrational Power Harvesting from Environment Based on Piezoelectric Cantilever Structures,TB535
  3. Research on the Fabrication & Properties of NaNbO3-BaTiO3 Lead-free Piezoelectric Ceramics,TM282
  4. Research of Preparation of BT and NBT Oriented Piezoelectric Ceramics in a Magnetic Field,TM282
  5. Preparation and Properties of Niobate Lead-based Piezoelectric Ceramics,TM282
  6. Research on PZT Driving Technology,TM282
  7. Theory and Structure Analysis of Vibration Energy Harvesting Based on Piezoelectric Material,TM22
  8. Self-Matching Circuitof Lead-Free Piezoelectric High Voltage Generator,TM282
  9. Research on High-Precision Dynamic Piezoelectric Ceramic Driving Power,TM282
  10. Research and Preparation on the Low Temperature Sintering of PZT-based Piezoelectric Ceramics,TM282
  11. The Research of Piezoelectric Cantilever Power Generator,TM61
  12. Studies on the Doping and Preparation of BNT-Based Lead-Free Piezoelectric Ceramics,TM282
  13. Doping Effect and Property Modification of Potassium-sodium Niobate Based Lead-free Piezoelectric Ceramics,TM282
  14. The Production and Performances of Flexible Piezoelectric and Electric Damping Composite,TB33
  15. Preparation and Modification of PMT-PMS-PZT High Power Piezoelectric Ceramics,TM282
  16. The Hydrothermal Preparation niobate powders and properties of lead - free piezoelectric ceramics,TM282
  17. Potassium sodium niobate piezoelectric ceramics powders mixed hydrothermal synthesis temperature,TB383.3
  18. Hydrothermal Synthesis of Lead Zirconate Titanate Based Piezoceramic Powders,TB383.3
  19. Research and Development of Bi0.5Na0.5 TiO3-Based Lead-free Piezoelectric Ceramics,TM282
  20. Bi_ (0.5 ) of Na_ ( 0.5 ) TiO_3 base electrical properties of lead-free piezoelectric ceramics,TM282
  21. BNT -based lead-free piezoelectric ceramic performance parameters and process research,TM282

CLC: > Industrial Technology > Electrotechnical > Independent power supply technology (direct power) > Other independent power
© 2012 www.DissertationTopic.Net  Mobile