Eddy Current Probe Sensitivity as a Function of Coil Construction Parameters

Capobianco, T. E.; Splett, J. D.; Iyer, H. K.

doi:10.1080/09349849008968032

Cited by 6 publications

(6 citation statements)

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“…Inestimable advantages of single-coil EC probes are concerned with the independence of the probe sensitivity on the crack direction, the design simplicity, the performance repeatability, small size, and low price. Due to these peculiarities, single-coil ferrite core EC probes are widely used for aircraft inspection [7,10,[13][14][15][16]. EC probes with one-coil mounted on ferrite core are used in EC flaw detector based on the resonant mode application like DEFECTOMETR family flaw detectors such as DEFECTOMETR 2.837 developed by Institute Dr. Foerster GmbH & Co. (Reutlingen, Germany) and VD-10A type flaw detector produced by KROPUS (Moscow, Russia).…”

Section: General Considerations Related To Ec Probe Selectionmentioning

confidence: 99%

“…The conditions needed for proposed coefficient investigation and the invariant properties of EC efficiency coefficient ξ for air-core coils in relation to coil diameter and the number of turns were shown [18][19]. This methodology based on the volume integral code (VIC-3D code [20]) calculations was successfully applied to optimize the ferrite core EC probe design in contrast to other experimental or simulation methods [14][15][16]20].…”

Section: Selection Of Ferrite Core Parameters For Single-coil Ec Probesmentioning

confidence: 99%

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Enhanced Eddy Current Techniques for Detection of Surface-Breaking Cracks in Aircraft Structures

Uchanin

2021

Transactions on Aerospace Research

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Well-timed detection of the defects (e.g., fatigue cracks and corrosive damages) in aircraft structures is the question of vital importance. Periodic in-service non-destructive inspection (NDI) is necessary to prevent expensive aircraft breakdowns during in-service life. Eddy current (EC) NDI method have many advantages for in-service aircraft inspection due to high mobility and the possibility to detect fatigue cracks without direct contact with the inspected surface (even through a protective coating without removal). Last decades some enhanced EC techniques were developed for aircraft in-service inspection in the Karpenko Physico-Mechanical Institute of National Academy of Sciences (Lviv) in collaboration with Ukrainian and foreign aircraft companies. Proposed earlier EC efficiency coefficient was applied for the selection of the ferrite-core EC probe parameters. Investigations concerned with the crack detectability for single-coil EC probes of different sizes were carried out to improve the inspection procedures. The sensitivity of the developed single-coil EC probe was experimentally investigated. The possibility to distinguish the signals associated with detected defect and lift-off was shown. The new inspection procedure was proposed for full suppression of the noise concerned with the rivet edge influence. The high-frequency EC flaw detector of Leotest VD 3.03 type based on self-generator mode and miniature single-coil EC probes application was developed for detection of the surface-breaking fatigue cracks. The original scheme of double-circuit self-generator with intermittent oscillations was invented and investigated. The pulse-repetition frequency of high-frequency oscillations was used as an informative parameter. The important feature of the developed self-generating scheme is the effective suppression of the lift-off influence (the changes of the clearance between the EC probe and the inspected object surface during the scanning). Developed EC flaw detectors of Leotest VD 3.03 type and inspection procedures were successfully implemented into the maintenance practice for detection of the fatigue cracks initiated in the wing and the fuselage structures and aviation engines in many companies such as ANTONOV AIRCRAFT, Lviv State Aircraft Repair Plant, Konotop aircraft repair plant «AVIAKON», Ukrainian International Airlines, MOTOR-SICH, State Enterprise “IVCHENKO-PROGRESS”, etc.

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Section: General Considerations Related To Ec Probe Selectionmentioning

confidence: 99%

Section: Selection Of Ferrite Core Parameters For Single-coil Ec Probesmentioning

confidence: 99%

Enhanced Eddy Current Techniques for Detection of Surface-Breaking Cracks in Aircraft Structures

Uchanin

2021

Transactions on Aerospace Research

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“…Factorial designs are such an important class of experimental design and have found so many applications at NBS/NIST that it is impossible to give a representative accounting of their usage. A study in the Electromagnetic Technology Division of the Electronics and Electrical Engineering Laboratory in Boulder illustrates the use of factorial designs for optimizing a measurement process [ 6 ]. This particular study examined eddy current probe sensitivity as a function of coil construction parameters.…”

Section: Historymentioning

confidence: 99%

Statistics and measurements

2001

J. Res. Natl. Inst. Stand. Technol.

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For more than 50 years, the Statistical Engineering Division (SED) has been instrumental in the success of a broad spectrum of metrology projects at NBS/NIST. This paper highlights fundamental contributions of NBS/NIST statisticians to statistics and to measurement science and technology. Published methods developed by SED staff, especially during the early years, endure as cornerstones of statistics not only in metrology and standards applications, but as data-analytic resources used across all disciplines. The history of statistics at NBS/NIST began with the formation of what is now the SED. Examples from the first five decades of the SED illustrate the critical role of the division in the successful resolution of a few of the highly visible, and sometimes controversial, statistical studies of national importance. A review of the history of major early publications of the division on statistical methods, design of experiments, and error analysis and uncertainty is followed by a survey of several thematic areas. The accompanying examples illustrate the importance of SED in the history of statistics, measurements and standards: calibration and measurement assurance, interlaboratory tests, development of measurement methods, Standard Reference Materials, statistical computing, and dissemination of measurement technology. A brief look forward sketches the expanding opportunity and demand for SED statisticians created by current trends in research and development at NIST.

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“…Thus, different eddy current probe (ECP) architectures to detect flaws are reported in the literature [5][6][7][8]. An excitation coil and detection coils usually form the eddy current probe.…”

Section: Introductionmentioning

confidence: 99%

A novel uniform eddy current probe with GMR for non destructive testing applications

Postolache

Ribeiro

Ramos

2011

2011 IEEE EUROCON - International Conference on Computer as a Tool

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Defect detection in conductive plates represents an important issue. The work presents the usage of a novel uniform eddy current probe (UECP) architecture that includes a magnetometer sensor based on a set of giant magnetoresistances as part of a non-destructive testing (NDT) system developed using a virtual instrument system technology. A practical approach concerning the UECP design and implementation and experimental results obtained on cracks and non-uniformities of welding lines performed in aluminum plates are presented. A comparison between the proposed novel eddy current probe architecture and the GMR pancake eddy current probe is included in the paper.

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Eddy Current Probe Sensitivity as a Function of Coil Construction Parameters

Cited by 6 publications

References 0 publications

Enhanced Eddy Current Techniques for Detection of Surface-Breaking Cracks in Aircraft Structures

Enhanced Eddy Current Techniques for Detection of Surface-Breaking Cracks in Aircraft Structures

Statistics and measurements

A novel uniform eddy current probe with GMR for non destructive testing applications

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