Standard Article

Eddy-Current Methods

Physical Monitoring Principles

Passive and Active Measurements with Data Analysis Approaches for Load and Damage Identification

  1. Neil Goldfine,
  2. Andrew Washabaugh,
  3. Yanko Sheiretov,
  4. Mark Windoloski

Published Online: 15 SEP 2009

DOI: 10.1002/9780470061626.shm019

Encyclopedia of Structural Health Monitoring

Encyclopedia of Structural Health Monitoring

How to Cite

Goldfine, N., Washabaugh, A., Sheiretov, Y. and Windoloski, M. 2009. Eddy-Current Methods. Encyclopedia of Structural Health Monitoring. .

Author Information

  1. JENTEK Sensors, Inc., Waltham, MA, USA

Publication History

  1. Published Online: 15 SEP 2009

Abstract

In the context of structural health monitoring (SHM), eddy-current testing (ET) is one of several techniques that the maintainers of high-value assets can select as part of an asset life management program. In this article, conventional ET and advanced ET methods are described. The focus is on scanning and point-by-point ET using handheld or automated systems. This article also describes an advanced ET method called the MWM-Array in detail and associated multivariate inverse methods called grid methods. In a companion article on eddy-current in situ sensors, the focus is on surface-mounted and embedded sensors for SHM, using onboard instrumentation or portable data-acquisition units.

Keywords:

  • magnetic field;
  • sensors;
  • diagnostics;
  • nondestructive testing;
  • inspection;
  • onboard damage detection;
  • performance;
  • crack standards