Electromagnetic Acoustic Transducers: Noncontacting by Masahiko Hirao,Hirotsugu Ogi

By Masahiko Hirao,Hirotsugu Ogi

This moment edition provides complete details on electromagnetic acoustic transducers (EMATs), from the speculation and actual ideas of EMATs to the development of structures and their functions to clinical and commercial ultrasonic measurements on fabrics. the unique model has been complemented with chosen rules on ultrasonic dimension that experience emerged because the first version used to be published.

The publication is split into 4 parts:

PART I bargains a self-contained description of the fundamental parts of coupling mechanisms besides the sensible designing of EMATs for numerous reasons. numerous implementations to make amends for EMATs’ low move potency are supplied, in addition to beneficial easy methods to make an EMAT.

PART II describes the main of electromagnetic acoustic resonance (EMAR), which makes the main of EMATs’ contactless nature and is the main profitable amplification mechanism for specific measurements of pace and attenuation.

PART III applies EMAR to learning actual acoustics. New measurements have emerged in regards to 4 significant topics: in situ tracking of dislocation habit, selection of anisotropic elastic constants, pointwise elasticity mapping (RUM), and acoustic nonlinearity evolution.

PART IV offers with a number of person concerns encountered in business purposes, for which the EMATs are believed to be the easiest recommendations. this is often confirmed by way of a couple of box applications.

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