Electromagnetic Acoustic Transducers
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Electromagnetic Acoustic Transducers
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Author : Masahiko Hirao
language : en
Publisher: Springer
Release Date : 2016-10-25
Electromagnetic Acoustic Transducers written by Masahiko Hirao and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016-10-25 with Technology & Engineering categories.
This second edition provides comprehensive information on electromagnetic acoustic transducers (EMATs), from the theory and physical principles of EMATs to the construction of systems and their applications to scientific and industrial ultrasonic measurements on materials. The original version has been complemented with selected ideas on ultrasonic measurement that have emerged since the first edition was released. The book is divided into four parts: PART I offers a self-contained description of the basic elements of coupling mechanisms along with the practical designing of EMATs for various purposes. Several implementations to compensate for EMATs’ low transfer efficiency are provided, along with useful tips on how to make an EMAT. PART II describes the principle of electromagnetic acoustic resonance (EMAR), which makes the most of EMATs’ contactless nature and is the most successful amplification mechanism for precise measurements of velocity and attenuation. PART III applies EMAR to studying physical acoustics. New measurements have emerged with regard to four major subjects: in situ monitoring of dislocation behavior, determination of anisotropic elastic constants, pointwise elasticity mapping (RUM), and acoustic nonlinearity evolution. PART IV deals with a variety of individual issues encountered in industrial applications, for which the EMATs are believed to be the best solutions. This is proven by a number of field applications.
Emats For Science And Industry
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Author : Masahiko Hirao
language : en
Publisher: Springer Science & Business Media
Release Date : 2013-04-17
Emats For Science And Industry written by Masahiko Hirao and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013-04-17 with Science categories.
EMATs for Science and Industry comprises the physical principles of electromagnetic acoustic transducers (EMATs) and the applications to scientific and industrial ultrasonic measurements on materials. The text is arranged in four parts: -PART I is intended to be a self-contained description of the basic elements of coupling mechanism along with practical designing of EMATs for various purposes. There are several implementations to compensate for the low transfer efficiency of the EMATs. Useful tips to make an EMAT are also presented. -PART II describes the principle of electromagnetic acoustic resonance (EMAR), which makes the most of contactless nature of EMATs and is the most successful amplification mechanism for precise velocity and attenuation measurements. -PART III applies EMAR to studying the physical acoustics. New measurements emerged on three major subjects; in situ monitoring of dislocation behavior, determination of anisotropic elastic constants, and acoustic nonlinearity evolution. -PART IV deals with a variety of individual topics encountered in industrial applications, for which the EMATs are believed to the best solutions.
Electromagnetic Acoustic Transducers
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Author : R. E. Beissner
language : en
Publisher:
Release Date : 1976
Electromagnetic Acoustic Transducers written by R. E. Beissner and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1976 with Electroacoustic transducers categories.
This report is a brief review of those aspects of electromagnetic-acoustic generation and detection of interest in nondestructive evaluation (NDE). Since this is a developing technology, there are no standard transducer designs and practices. The principles of ultrasonic wave generation as related to electromagnetic-acoustic transducer (EMAT) design are emphasized. EMATs are of interest in NDE because they offer a completely noncontacting technique for generating and detecting ultrasonic waves. The report discusses theory, experimental studies, design, and applications of EMATs. (Author).
Electromagnetic Acoustic Transducer Analysis
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Author : Reza Jafari
language : en
Publisher: LAP Lambert Academic Publishing
Release Date : 2011-10
Electromagnetic Acoustic Transducer Analysis written by Reza Jafari and has been published by LAP Lambert Academic Publishing this book supported file pdf, txt, epub, kindle and other format this book has been release on 2011-10 with categories.
Electromagnetic acoustic transducers (EMATs) are non-contact, non-destructive testing devices for conducting specimens. The efficiency of EMATs is inherently low and methods for increasing it have been the subject of intense research. In publications, the finite element (FE) technique has been applied to the diffusion equation in order to model EMATs. However, electromagnetic theory indicates that the diffusion equation must be solved for the magnetic vector potential (MVP) in conjunction with an equation for the total current. An existing FE formulation considering the two equations becomes unstable when modeling transient inputs in EMAT transmitters. The limitation posed by the instability prompted the development of an improved FE formulation, which solves the two equations and is suitable for the modeling of EMATs.The objective of the research work described in this thesis is to properly and accurately model EMATs, so that their efficiency could be improved at the design stage. The thesis describes the governing equations of EMATs, improved techniques for their solution, and the application of these techniques to the analysis of such devices.
Electromagnetic Acoustic Transducers Emats Of Different Magnetic Strength
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Author : Nurul Fariha Ahmad
language : en
Publisher:
Release Date : 2012
Electromagnetic Acoustic Transducers Emats Of Different Magnetic Strength written by Nurul Fariha Ahmad and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012 with categories.
Determining The Optimal Parameters Of Electromagnetic Acoustic Transducers For Inspection Of Ferrous Sheet Metal
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Author : N. A. GLUKHOV
language : en
Publisher:
Release Date : 1973
Determining The Optimal Parameters Of Electromagnetic Acoustic Transducers For Inspection Of Ferrous Sheet Metal written by N. A. GLUKHOV and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1973 with categories.
THE BASIC RELATIONS ARE ANALYZED BY WHICH PARAMETERS OF ELECTROMAGNETIC-ACOUSTIC TRANSDUCERS HAVE BEEN SELECTED FOR THE INSPECTION OF FERROUS SHEET METAL BY NORMALLY INCIDENT WAVES. THE RESULTS OF OPTIMIZING THE ELECTROMAGNETIC-ACOUSTIC TRANSDUCER COMPONENTS EXPERIMENTALLY ARE SHOWN AND THEN GENERALIZED. DESCRIBED ARE ALSO TRANSDUCER DESIGNS WHICH HAVE BEEN DEVELOPED FOR VARIOUS APPLICATIONS.
Electromagnetic Acoustic Transducers And Their Applications
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Author :
language : en
Publisher:
Release Date : 1986
Electromagnetic Acoustic Transducers And Their Applications written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1986 with categories.
Electromagnetic Acoustictransducers
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Author : Nondestructive Testing Information Analysis Center
language : en
Publisher:
Release Date : 1987
Electromagnetic Acoustictransducers written by Nondestructive Testing Information Analysis Center and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1987 with categories.
High Temperature Ultrasonic Measurements In Steel Using Electromagnetic Acoustic Transducers
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Author : Donald Malcolm Boyd
language : en
Publisher:
Release Date : 1989
High Temperature Ultrasonic Measurements In Steel Using Electromagnetic Acoustic Transducers written by Donald Malcolm Boyd and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1989 with categories.
Electromagnetic Acoustic Transducers Emat To Measure Rayleigh Wave Interaction With Surface Cracks
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Author : Kambiz Shahnazi
language : en
Publisher:
Release Date : 1988
Electromagnetic Acoustic Transducers Emat To Measure Rayleigh Wave Interaction With Surface Cracks written by Kambiz Shahnazi and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1988 with categories.