Dielectric Elastomer Sensors
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Dielectric Elastomer Sensors
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Author : Na Ni
language : en
Publisher:
Release Date : 2017
Dielectric Elastomer Sensors written by Na Ni and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2017 with Science categories.
Dielectric elastomers (DEs) represent a class of electroactive polymers (EAPs) that exhibit a significant electromechanical effect, which has made them very attractive over the last several decades for use as soft actuators, sensors and generators. Based on the principle of a plane-parallel capacitor, dielectric elastomer sensors consist of a flexible and stretchable dielectric polymer sandwiched between two compliant electrodes. With the development of elastic polymers and stretchable conductors, flexible and sensitive dielectric elastomer tactile sensors, similar to human skin, have been used for measuring mechanical deformations, such as pressure, strain, shear and torsion. For high sensitivity and fast response, air gaps and microstructural dielectric layers are employed in pressure sensors or multiaxial force sensors. Multimodal dielectric elastomer sensors have been reported that can detect mechanical deformation but can also sense temperature, humidity, as well as chemical and biological stimulation in human-activity monitoring and personal healthcare. Hence, dielectric elastomer sensors have great potential for applications in soft robotics, wearable devices, medical diagnostic and structural health monitoring, because of their large deformation, low cost, ease of fabrication and ease of integration into monitored structures.
Modeling Processing And Characterization Of Dielectric Elastomer Actuators And Sensors
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Author : Kevin Kadooka
language : en
Publisher:
Release Date : 2017
Modeling Processing And Characterization Of Dielectric Elastomer Actuators And Sensors written by Kevin Kadooka and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2017 with categories.
Over the past two decades, electroactive polymers (EAP) have been studied as a material for soft actuator and sensor systems. Dielectric elastomers (DE) are an EAP material which relies on the electrostatic force produced on compliant electrodes to produce deformation. In the converse sense, DE sensors can be used by measuring the electrical energy or impedance change produced under deformation. The two key limitations barring DE from commercial use are high driving voltage, and low output force. The scope of this work is as follows: to improve upon these two limitations by processing of actuators by a pneumatic dispenser, by adding tactile sensing and variable stiffness properties to the actuators, and developing a mechanical model to predict the actuator behavior. This work focuses specifically on the unimorph dielectric elastomer actuator (DEA), which consists of a DE laminate which contracts in the thickness direction and expands in-plane under applied voltage, and is constrained on one face by a passive material, resulting in bending of the structure. The first part of the work is devoted to fabrication, modeling, and characterization of multilayer unimorph DEA. Fabrication is done using two schemes – the first is a conventional one, using commercially available DE films, and the second is a novel method using a robotic dispenser system. The latter technique has two objectives. The first is to reduce the thickness of the DE layers to reduce driving voltage, since the DE deformation is proportional to the square of the applied electric field which itself is inversely proportional to electrode separation. The second is to deposit higher-performance DE materials, in this case, PVDF terpolymer, which exhibits large actuation stresses because of its high dielectric constant and relatively high Young’s modulus. Using the dispenser, DE layers with 10 μm thick layers are repeatably produced, requiring actuation voltages one order of magnitude less than conventional thick DE films. Standard deviation of displacement and blocking force do not exceed 10% and 15% of the mean after 2 minutes of deformation, respectively. Elastic and viscoelastic models are developed for multilayer unimorph DEA consisting of flat and curved geometries. Both models were validated in comparison with experimental data with the latter shown to agree with the experimental data to within one standard deviation of the mean for majority of the deformation. The second section demonstrates the novel use of electrolaminates to create variable stiffness DEA (VSDEA). Variable stiffness structures are of particular interest for soft actuators, because they allow switching between a low stiffness, high displacement mode and a high stiffness mode with large holding force. One device is demonstrated by simply utilizing the passive layer of a DEA as part of an electrolaminate, allowing for four-fold increase in bending rigidity. Another device is demonstrated consisting of a bundle of parallel DEA with electrostatic chucking features to modulate shear strength of the interfaces. This device exhibits a 39-fold increase in stiffness, and a claw actuator using these actuators is capable of lifting an object 17 times its own weight. The final part of this work investigates two novel tactile sensors based on dielectric elastomers (DES). The first uses a dome-shaped protrusion to redistribute tactile forces onto an array of four capacitive sensors. The change in capacitance of the four sensors is used to measure and discriminate the force components of the impinging force. An array of these dome DES are fabricated using the dispenser system, and the ability to differentiate between normal and shear forces was demonstrated, as well as its proximity sensing ability. The tactile sensor array is also shown integrated as the passive layer of a DEA, providing tactile and proximity sensing capability to the actuator. The second tactile sensor features high resolution and scalability, and is built in to a medical assistive device coined the “artery mapper” and is used to determine the location of a target artery for arterial line placement. It is demonstrated locating an artery on a test subject, possible due to its force resolution on the order of 2.8 kPa.
Advances In Dielectric Elastomer Composites
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Author : Masoud Asgari
language : en
Publisher: CRC Press
Release Date : 2025-03-25
Advances In Dielectric Elastomer Composites written by Masoud Asgari and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2025-03-25 with Technology & Engineering categories.
This is a comprehensive guide to dielectric elastomer composites (DECs), which play an integral role in new electromechanically active smart-material technologies. Introducing the basic concepts behind DECs, the book is accessible to readers at all levels. It demonstrates how to implement practical problem-solving methods through nonlinear continuum mechanics and also discusses fiber-reinforced anisotropic DE composites and the electromechanically coupled behavior of anisotropic fiber-reinforced DEs. Using practical examples throughout, it proposes models which utilize the strain energy function, nonlinear electro-elasticity, and nonlinear continuum mechanics. It presents clear guidelines for creating practical nonlinear finite element code, and introduces the reader to hyperelasticity. The book will be an accessible reference guide for students, researchers, and engineers in the field of mechanical engineering, bioengineering, materials science, aeronautics, and robotics.
Dielectric Elastomers As Electromechanical Transducers
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Author : Federico Carpi
language : en
Publisher: Elsevier
Release Date : 2011-09-06
Dielectric Elastomers As Electromechanical Transducers written by Federico Carpi and has been published by Elsevier this book supported file pdf, txt, epub, kindle and other format this book has been release on 2011-09-06 with Technology & Engineering categories.
Dielectric Elastomers as Electromechanical Transducers provides a comprehensive and updated insight into dielectric elastomers; one of the most promising classes of polymer-based smart materials and technologies. This technology can be used in a very broad range of applications, from robotics and automation to the biomedical field. The need for improved transducer performance has resulted in considerable efforts towards the development of devices relying on materials with intrinsic transduction properties. These materials, often termed as "smart or "intelligent, include improved piezoelectrics and magnetostrictive or shape-memory materials. Emerging electromechanical transduction technologies, based on so-called ElectroActive Polymers (EAP), have gained considerable attention. EAP offer the potential for performance exceeding other smart materials, while retaining the cost and versatility inherent to polymer materials. Within the EAP family, "dielectric elastomers, are of particular interest as they show good overall performance, simplicity of structure and robustness. Dielectric elastomer transducers are rapidly emerging as high-performance "pseudo-muscular actuators, useful for different kinds of tasks. Further, in addition to actuation, dielectric elastomers have also been shown to offer unique possibilities for improved generator and sensing devices. Dielectric elastomer transduction is enabling an enormous range of new applications that were precluded to any other EAP or smart-material technology until recently. This book provides a comprehensive and updated insight into dielectric elastomer transduction, covering all its fundamental aspects. The book deals with transduction principles, basic materials properties, design of efficient device architectures, material and device modelling, along with applications. - Concise and comprehensive treatment for practitioners and academics - Guides the reader through the latest developments in electroactive-polymer-based technology - Designed for ease of use with sections on fundamentals, materials, devices, models and applications
Elastomers
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Author : Nevin Çankaya
language : en
Publisher: BoD – Books on Demand
Release Date : 2017-08-30
Elastomers written by Nevin Çankaya and has been published by BoD – Books on Demand this book supported file pdf, txt, epub, kindle and other format this book has been release on 2017-08-30 with Science categories.
Summary-Book Contents: Your purpose of reading this book is to concentrate on recent developments on elastomers. The articles collected in this book are contributions by invited researchers with a long-standing experience in different research areas. I hope that the material presented here is understandable to a broad audience, not only scientists but also people with many different disciplines. The book contains eleven chapters in two sections: (1) "Mechanical Properties of Elastomers" and (2) "Elastomers for Natural and Medical Applications." The book provides detailed and current reviews in these different areas written by experts in their respective fields. This book will be useful for polymer workers and other scientists alike and will contribute to the training of current and future researchers, academics, PhD students, and other scientists.
Polymeric Sensors And Actuators
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Author : Johannes Karl Fink
language : en
Publisher: John Wiley & Sons
Release Date : 2012-10-29
Polymeric Sensors And Actuators written by Johannes Karl Fink and has been published by John Wiley & Sons this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-10-29 with Technology & Engineering categories.
The book exhaustively covers the various polymers that are used for sensors and actuators from the perspective of organic chemistry. The field of polymeric sensors and actuators is developing very rapidly as newly derived polymer materials are suitable for sensor technology. This book uniquely and comprehensively covers the various polymers that are used for sensors and actuators. The author has researched both scientific papers and patents to include all the recent discoveries and applications. Since many chemists may not be very familiar with the physical background as well as how sensors operate, Polymeric Sensors and Actuators includes a general chapter dealing with the overall physics and basic principles of sensors. Complementary chapters on their methods of fabrication as well as the processing of data are included. The actuators sections examine the fields of applications, special designs, and materials. The final chapter is dedicated to liquid crystal displays. The book concludes with four extensive indices including one special one on analytes to allow the practitioner to easily use the text. This comprehensive text examines the following sensor types: Humidity Sensors Biosensors Mechanical Sensors Optical Sensors Surface Plasmon Resonance Test Strips Microelectromechanical (MEMS) Sensors Piezoelectric Sensors Acoustic Wave Sensors Electronic Nose Switchable Polymers
Intelligent Materials
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Author : Mohsen Shahinpoor
language : en
Publisher: Royal Society of Chemistry
Release Date : 2008
Intelligent Materials written by Mohsen Shahinpoor and has been published by Royal Society of Chemistry this book supported file pdf, txt, epub, kindle and other format this book has been release on 2008 with Science categories.
From the nanoscale to the macroscopic scale, intelligent materials are triggering a response across both dimensions and scientific disciplines... World class, leading experts in the fields of chemistry, physics and engineering have contributed to Intelligent Materials, highlighting the importance of smart material science in the 21st century. In this exceptional text the expertise of specialists across the globe is drawn upon to present a truly interdisciplinary, outline of the topic. Covering both a bottom-up chemical, and top-down engineering approach to the design of intelligent materials the Editors of the book are bridging a vital gap between various scientific authorities. The influence of current research in this field on future technology is undisputed and potential applications of intelligent materials span nanoscience, nano technology, medicine, engineering, biotechnology, pharmaceutical and many other industries. This is an authoritative introduction to the most recent developments in the area, which will provide the reader with a better understanding of the almost unlimited opportunities in the progress and design of new intelligent materials. An indispensable reference for anyone contemplating working in the field! The Editors Mohsen Shahinpoor is the Chief Scientist and Director of Biomedical Poducts at Environmental Robots Inc. and a Regents Professor at the Univesity of New Mexico. His work in the field of Robotic Systems and Smart/Intelligent Materials covers over some 22 years, and includes numerous publications and patents. Prof. Dr. Hans-Joerg Schneider is Professor em. of organic chemistry at the Universitaet des Saarlandes, Germany. He has played a pivotal role in transferring the principals of molecular recognition into supramolecular polymers and has published a multitude of books and papers in the field, with several patents pending for intelligent chemomechanical materials. Comments on this book... This will be the starting point for all researchers looking for industrial solutions involving smart materials. Congratulations to the Editors for providing such a vast and interdisciplinary book. P.-G de Gennes, France Prix Nobel de Physic 1991
Functional Tactile Sensors
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Author : Ye Zhou
language : en
Publisher: Woodhead Publishing
Release Date : 2021-01-20
Functional Tactile Sensors written by Ye Zhou and has been published by Woodhead Publishing this book supported file pdf, txt, epub, kindle and other format this book has been release on 2021-01-20 with Technology & Engineering categories.
Functional Tactile Sensors: Materials, Devices and Integrations focuses on the subject of novel materials design and device integration of tactile sensors for functional applications. The book addresses the design, materials characteristics, device operation principles, specialized device application and mechanisms of the latest reported tactile sensors. The emphasis of the book lies in the materials science aspects of tactile sensors—understanding the relationship between material properties and device performance. It will be an ideal resource for researchers working in materials science, engineering and physics. - Includes the latest advances and recent developments in tactile sensors for artificial intelligence applications - Reviews the relationship between materials properties and device performance - Addresses materials and device design strategies for targeted sensing applications
Electroactive Polymeric Materials
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Author : Inamuddin
language : en
Publisher: CRC Press
Release Date : 2022-04-28
Electroactive Polymeric Materials written by Inamuddin and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2022-04-28 with Science categories.
Electroactive polymers are smart materials that can undergo size or shape structural deformations in the presence of an electrical field. These lightweight polymeric materials possess properties such as flexibility, cost-effectiveness, rapid response time, easy controllability (especially physical to electrical), and low power consumption. Electroactive Polymeric Materials examines the history, progress, synthesis, and characterization of electroactive polymers and then details their application and potential in fields including biomedical science, environmental remediation, renewable energy, robotics, sensors and textiles. Highlighting the flexibility, lightweight, cost-effective, rapid response time, easy controllability, and low power consumption characteristics of electroactive polymers, respected authors in the field explore their use in sensors, actuators, MEMS, biomedical apparatus, energy storage, packaging, textiles, and corrosion protection to provide readers with a powerhouse of a reference to use for their own endeavors. Features: Explores the most recent advances in all categories of ionic/electroactive polymer composite materials Includes basic science, addresses novel topics, and covers multifunctional applications in one resource Suitable for newcomers, academicians, scientists and R&D industrial experts working in polymer technologies .
Intelligent Robotics And Applications
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Author : YongAn Huang
language : en
Publisher: Springer
Release Date : 2017-08-04
Intelligent Robotics And Applications written by YongAn Huang and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2017-08-04 with Computers categories.
The three volume set LNAI 10462, LNAI 10463, and LNAI 10464 constitutes the refereed proceedings of the 10th International Conference on Intelligent Robotics and Applications, ICIRA 2017, held in Wuhan, China, in August 2017. The 235 papers presented in the three volumes were carefully reviewed and selected from 310 submissions. The papers in this third volume of the set are organized in topical sections on sensors and actuators; mobile robotics and path planning; virtual reality and artificial intelligence; aerial and space robotics; mechatronics and intelligent manufacturing.