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    Piezoelectrics Test in Prosthetics
    Piezoelectrics Test in Prosthetics
    Piezoelectrics Test in Prosthetics
    Ebook125 pages48 minutes

    Piezoelectrics Test in Prosthetics

    By Kesorn Pechrach

    ()

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    About this ebook

    This book demonstrates the designs, experimental results and models of the energy harvesting system using piezoelectric smart materials for self-power generation in prosthetics. This book covers energy harvesting, electro-mechanical energy, dynamic analysis, piezoelectric composites, piezoelectric flexible film, macro fibre composites, experimental setup, simulations, converter and rectifier. The effect of the capacitor in the harvester circuit was also investigated. This helps to store energy effectively with low leakage. The PZT has been employed and embedded in the prosthesis to improve the prosthetic geometric parameters, beam, mass and the resistive electric loads which significantly influence the output power. This book introduces a new type of self- power generation prosthetics.

    LanguageEnglish
    PublisherPechrach Publishing
    Release dateMay 18, 2016
    ISBN9781533746689
    Piezoelectrics Test in Prosthetics

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      Book preview

      Piezoelectrics Test in Prosthetics - Kesorn Pechrach

      Acknowledgments

      I would like to thank my beautiful son, Neran J. P. Weaver for his non-stop supporting.

      Many Thanks to my family in Thailand and my family in Britain for always believe in me.

      Thanks to Prof. J.W. McBride, Prof. J. Swingler, Prof. Suleiman M Sharkh, Peter Wheeler and Peter Wilkes  for their support.

      I would like to thank and Dr Krisna R. Torrissen for a big encouraging and enormous support, to push me forwards few more steps.

      A special thanks to Dr P M Weaver for looking after our family while I write this book.

      I would like to thanks my project colleagues: Prof. P. Manooonpong, Dr N. Hatti1, Dr K. Komoljindakul, and Dr K. Tungpimolrut and J. Phontip. We have done a great job and enjoy working together. I would make it real, bring it forward and make it successful.

      I would like to say special thank you to K. Carpenter, CEO of Rehabilitation Research Institute (RRI), Seattle, WA, USA for donate the prosthetic legs for our research project.

      Thanks to Khon Khan University, King Mongkut's University of Technology Thonburi, University of Southampton, ATPER and OSTC Brussels for providing up to date research information in Europe and funding sources.

      My best friends Rajiya Sultana, Anna Wlodarczyk and Kanae Jinkerson for their cheerfully support.

      Finally, I would like to thanks the professional, specialists, medical staffs in Rosie hospitals, Addenbrook hospitals, Portsmouth hospitals and Parsonage Lane Surgery. 

      Introduction

      The first time when I got to know and physically touch a piezoelectric when I was working in the laboratory at University of Southampton, UK. The small piece of this material was so thin and amazing me.

      I had been living, eating and sleeping with these piezoelectrics while I used them in my experiments. That time I used it as an actuator to trip the circuit breakers when the 22 kA short circuit current was fed through  the main feeders.

      That when I started to realise this piezoelectric not only need supply power in order to make it work as a switching devices but it also can generate electricity out from any small vibration.

      Then, I used the piezoelectric to harvest a lot of energy from many types of research fields and one of them is piezoelectric energy harvesting in prosthetics.

      I hope this book will help you to more understand the piezoelectric’s behaviour and their applications.

      Kesorn Pechrach Weaver

      25 April 2016

      England, UK

      Table of Contents

      Acknowledgement

      Chapter 1: Energy Harvesting

      1.1 Piezoelectric PZT

      1.2 The Macro Fiber Composite (MFC)

      1.3 MFC Piezoceramic Structure

      1.4 Energy Harvesting Circuit

      Chapter 2: Piezoelectric

      2.1 Planar Bimorph Energy harvesting

      2.2 Planar Bimorph Operation

      2.3 Planar Bimorph Structure

      2.4 Surface structure

      2.5 Piezoelectric and Prosthetics

      2.6 Piezoelectric Film

      Chapter 3: Prosthetics

      3.1 Prosthetic Leg with harvesting equipments

      3.2 Upper Prosthetic Leg with harvesting equipments

      3.3 Prosthetic Knee & harvesting equipments

      3.4 Prosthetic Foot & harvesting equipments

      Chapter 4: Experimental Setup

      4.1 Experimental Equipments

      4.2 Installation Position

      4.3 Waveform of PZT

      4.4 Waveform of MFC

      4.5 The Effect of Piezoelectric Position

      4.6 The Effect of Angle Degrees

      Chapter 5: Electro-Mechanical Energy

      5.1 Energy Characteristic

      5.2 Electro-Mechanical Behavior

      Chapter 6: Electro-Mechanical Modelling

      6.1 PZT System

      6.2 Damping Factors

      6.3 System Modelling

      6.4 Frequency Simulation

      6.5 Buck Converter

      Chapter 7: Dynamic Analysis

      7.1 Lead Zirconate Titanate

      7.2 Dynamic Structure

      7.3 Current Analysis

      7.4 Voltage Analysis

      7.5 Hit Dynamic

      7.6 Pull Dynamic

      7.7 Hit Experiments

      7.8 Pull Experiments

      Chapter 8: Simulations and Experiments

      8.1 Operating Waveforms

      8.2 Hit Simulation

      8.3 Hit Experiments

      8.4 Pull Simulation

      8.5 Pull Experiments

      Chapter 9: Converter and Rectifier

      9.1 Buck and Boost

      9.2 Load Connection

      9.3 Full-Bridge Diode Rectifier

      9.4 PZT Full-bridge Rectifier

      Chapter 10: MFC

      10.1 Background

      10.2 Problems

      10.3 Macro Fiber Composite

      10.4 MFC Modelling

      10.5 Equivalent Circuit

      Chapter 11: Energy Storage Capacitors

      11.1 Energy Storage 

      11.2 MFC Output

      11.3 Capacitor Output

      11.4 Energy Harvesting Test

      Chapter 12: Power Harvesting

      12.1 Frequency and Voltage

      12.2 Voltage Waveform

      12.3 Load Resistance

      12.4 Power Harvesting

      12.5 Internal Resistance

      Chapter 13: Conclusion

      References

      Table of Figures

      Chapter 1: Energy Harvesting

      Figure 1.1: Piezoelectric PZT

      Figure 1.2: Diagram of the PZT piezoelectric

      Figure 1.3: The effective pivot point

      Figure 1.4: PZT Energy harvesting circuit diagram

      Figure 1.5: MFC Energy harvesting circuit diagram

      Chapter 2: Piezoelectric

      Figure 2.1:  Schematic diagram of the operation of the planar bimorph energy harvesting

      Figure 2.2: Effective pivot in planar bimorph energy harvesting

      Figure 2.3:  Surface structure of piezoelectric ceramic

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