Results 211 to 220 of about 6,038 (254)
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Mapping of Eddy Current Probe Fields
1986An experimental determination of eddy current probe fields can be useful in several areas of nondestructive evaluation (NDE). In a very practical sense, a field map or profile is a good tool for examining the variations in probe performance. We show that probes of nominally identical construction can produce very different magnetic fields.
Capobianco, T. +2 more
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Eddy current probe patterned in YBCO
IEEE Transactions on Appiled Superconductivity, 2001Superconductive quantum interference devices (SQUIDs) coupled to arrays of small pickup loops can give images of millimeter fatigue cracks deep inside structures, using eddy currents. Coupling magnetic flux from a pickup loop to a SQUID commonly leads to a thousand fold loss.
W.N. Podney, J.M. Murduck
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Impedance of the Eddy-Current Displacement Probe: The Transformer Model
IEEE Transactions on Instrumentation and Measurement, 2004A new approach to calculation of the impedance of the Eddy-current displacement probe is presented. It is based on the transformer model of the probe target-coupling. The usual method of calculating the impedance by solving for the electromagnetic field distribution in the probe and the conductive target involves solution of integral equations. Instead,
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Eddy current probe performance requirements
NDT International, 1990Abstract : This study resulted in the development of a procurement specification for single-coil, absolute eddy current probes (shielded and nonshielded) which are used by the USAF with the Hocking UH-B (or equivalent) instruments for inspection of aluminum airframe structures.
G.L. Burkhardt, T.L. Allen, S.N. Rowland
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The eddy current probe array for Keda Torus eXperiment
Review of Scientific Instruments, 2016In a reversed field pinch device, the conductive shell is placed as close as possible to the plasma so as to balance the plasma during discharge. Plasma instabilities such as the resistive wall mode and certain tearing modes, which restrain the plasma high parameter operation, respond closely with conditions in the wall, in essence the eddy current ...
Zichao Li +21 more
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Design and analysis of a GMR eddy current probe for NDT
2013 Seventh International Conference on Sensing Technology (ICST), 2013Defect detection in metallic plates represents an important issue in metal industry, because its potential use in quality control process. Eddy current testing is one of the most extensively used nondestructive techniques for inspecting electrically conductive materials. The purpose of this paper is to present an eddy current testing system for surface
Rodrigo Wolff Porto +3 more
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An Approach for Characterization of Eddy Current Probes
AIP Conference Proceedings, 2005The paper describes a new inverse method to determine eddy current probe internal parameters, such as coil diameters, coil height, and ferrite‐core dimensions if present, from impedance data. The approach uses an inverse model based on a radial basis function neural network, trained by a boundary element model.
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Recent Developments of Eddy Current Probes
2010Eddy Currents (EC) technique is a powerful means of detection of defects in conductive components. The spectrum of industrial needs is large and EC probes have to be optimized to deal with different issues. Thanks to the CIVA-simulation platform, the CEA LIST develops high resolution arrays and high sensitive flexible probes to bring adapted solutions.
Marchand Benoît +3 more
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Operation of Eddy Current Probe Coil
Journal of the Franklin Institute, 1980Abstract Simplified formulae yielding the interaction between a current loop and a conducting surface are provided. The results are summarized in graphical and analytical form and are intended to provide a convenient means of estimating preliminary results at the initial state of an experimental investigation.
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Characterization and implementation of a GMR based probe for eddy current testing
International Journal of Applied Electromagnetics and Mechanics, 2008The aim of this work is to describe an eddy current non-destructive testing system employing Giant Magnetoresistive (GMR) sensors. GMR sensors are solid state devices capable of measuring the magnetic flux density. The use of GMR sensors in the framework of eddy current testing is motivated by their intrinsically high sensitivity, large bandwidth and ...
TAMBURRINO, Antonello +3 more
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