Location

San Diego, CA

Start Date

1-1-1985 12:00 AM

Description

The discovery of electromagnetic induction by Faraday and Henry in 1831 not only served as the catalyst needed for the very creation of electrical engineering but also provided the physical basis for eddy current nondestructive testing (NDT) as we know it today and as first realized in the classical experiments of Hughes1. As this fundamental work preceded Maxwell’s prediction of electromagnetic wave phenomena by over half a century, it may seem somewhat surprising to the casual reader that there should be any need to explain why eddy current NDT phenomena can be classified as quasi-static in nature with none of the attributes of classical electromagnetic waves. Unfortunately, there are many misconceptions concerning the wave-like nature of eddy current NDT phenomena which have even led to the suggestion2 that conventional eddy current NDT probe signals can be treated holographically. There are several reasons for the existence of these misconceptions:

Book Title

Review of Progress in Quantitative Nondestructive Evaluation

Volume

4A

Chapter

Chapter 2: Eddy Currents

Section

Display Methods

Pages

499-506

DOI

10.1007/978-1-4615-9421-5_56

Language

en

File Format

Application/pdf

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Jan 1st, 12:00 AM

Diffusion, Waves, Phase and Eddy Current Imaging

San Diego, CA

The discovery of electromagnetic induction by Faraday and Henry in 1831 not only served as the catalyst needed for the very creation of electrical engineering but also provided the physical basis for eddy current nondestructive testing (NDT) as we know it today and as first realized in the classical experiments of Hughes1. As this fundamental work preceded Maxwell’s prediction of electromagnetic wave phenomena by over half a century, it may seem somewhat surprising to the casual reader that there should be any need to explain why eddy current NDT phenomena can be classified as quasi-static in nature with none of the attributes of classical electromagnetic waves. Unfortunately, there are many misconceptions concerning the wave-like nature of eddy current NDT phenomena which have even led to the suggestion2 that conventional eddy current NDT probe signals can be treated holographically. There are several reasons for the existence of these misconceptions: