Electromagnetic Acoustic Transducers

Noncontacting Ultrasonic Measurements using EMATs

  • Masahiko Hirao
  • Hirotsugu Ogi

Table of contents

  1. Front Matter
    Pages i-xvi
  2. Masahiko Hirao, Hirotsugu Ogi
    Pages 1-11
  3. Development of EMAT Techniques

    1. Front Matter
      Pages 13-13
    2. Masahiko Hirao, Hirotsugu Ogi
      Pages 15-38
    3. Masahiko Hirao, Hirotsugu Ogi
      Pages 39-67
    4. Masahiko Hirao, Hirotsugu Ogi
      Pages 69-79
  4. Resonance Spectroscopy with EMATS-EMAR

    1. Front Matter
      Pages 81-81
    2. Masahiko Hirao, Hirotsugu Ogi
      Pages 83-91
    3. Masahiko Hirao, Hirotsugu Ogi
      Pages 93-102
  5. Physical Acoustic Studies

    1. Front Matter
      Pages 103-103
    2. Masahiko Hirao, Hirotsugu Ogi
      Pages 105-131
    3. Masahiko Hirao, Hirotsugu Ogi
      Pages 133-191
    4. Masahiko Hirao, Hirotsugu Ogi
      Pages 193-208
    5. Masahiko Hirao, Hirotsugu Ogi
      Pages 209-216
  6. Industrial Applications

    1. Front Matter
      Pages 217-217
    2. Masahiko Hirao, Hirotsugu Ogi
      Pages 219-231
    3. Masahiko Hirao, Hirotsugu Ogi
      Pages 233-269
    4. Masahiko Hirao, Hirotsugu Ogi
      Pages 271-280
    5. Masahiko Hirao, Hirotsugu Ogi
      Pages 281-302
    6. Masahiko Hirao, Hirotsugu Ogi
      Pages 303-310

About this book

Introduction

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.

Keywords

Elastic Constants Elastic Wave Propagation Electromagnetic Acoustic Transducer (EMAT) Fundamental Physics of Wave-matter Interactions Internal Friction Materials characterization Noncontact Ultrasonic Measurements Physical Acoustics Resonance Spectroscopy Ultrasonic Microscopy Ultrasonic Nondestructive Inspection/evaluation

Authors and affiliations

  • Masahiko Hirao
    • 1
  • Hirotsugu Ogi
    • 2
  1. 1.Osaka UniversityToyonakaJapan
  2. 2.Osaka UniversityToyonakaJapan

Bibliographic information

  • DOI https://doi.org/10.1007/978-4-431-56036-4
  • Copyright Information Springer Japan 2017
  • Publisher Name Springer, Tokyo
  • eBook Packages Physics and Astronomy
  • Print ISBN 978-4-431-56034-0
  • Online ISBN 978-4-431-56036-4
  • Series Print ISSN 2198-7807
  • Series Online ISSN 2198-7815
  • About this book