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Detection of Surface and Subsurface Flaws with Miniature GMR-Based Gradiometer
2022
Sensors
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In this work, we propose a novel design of a miniature eddy-current probe using a giant magnetoresistance (GMR) sensor fabricated on a silicon chip. ...
The results demonstrate the feasibility and superiority of the proposed miniature GMR EC probe for characterizing the small and complex-shaped defects in multilayer conductive samples. ...
Informed Consent Statement: Not applicable. Data Availability Statement: Not applicable.
Conflicts of Interest: The authors declare no conflict of interest. ...
doi:10.3390/s22083097
pmid:35459081
pmcid:PMC9031852
fatcat:z23isvfm3fdphjtekmjftja3ci
Electromagnetic Imaging Methods for Nondestructive Evaluation Applications
2011
Sensors
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Electromagnetic nondestructive tests are important and widely used within the field of nondestructive evaluation (NDE). ...
the systems design and made the potential of electromagnetic NDE imaging seemingly unlimited. ...
The use of giant magnetoresistive (GMR) sensors for electromagnetic imaging in nondestructive evaluation has grown considerably in the last few years. ...
doi:10.3390/s111211774
pmid:22247693
pmcid:PMC3252010
fatcat:mtjxzhlge5hlpdnkq2zil6bz4q
Biomaterial Real Cracks Evaluation by Eddy Current Testing Method
2015
Communications - Scientific Letters of the University of Zilina
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Acknowledgment The authors wish to express their thanks to prof. Peter Palcek and his co-workers of Department of Mechanical Engineering, University of Zilina, for the cooperation. ...
This work was supported by the Slovak Research and Development Agency under the contracts No. APVV-0349-10. ...
CBM and SHM systems include three phases: detection, diagnosis and prediction. The first two phases are inherently associated with non-destructive evaluation (NDE) of materials. ...
doi:10.26552/com.c.2015.1a.12-16
fatcat:wmery536bjceldnpcnq3zafbhm
Challenges in improving the performance of eddy current testing: Review
2018
Measurement and control (London. 1968)
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The second part mainly comprised an in-depth discussion of the lift-off effect with particular consideration of ensuring that defects are correctly measured, and the eddy current testing probes are optimized ...
This paper presents an overview of eddy current testing technique and the probe structure design factors that affect the accuracy of crack detection. ...
Application of artificial intelligent in eddy current GMR sensor is used in ECT to pick up the MF in the presence of the defect. ...
doi:10.1177/0020294018801382
fatcat:arkmhe2zf5hizn362tq2y67wny
Rotating Focused Field Eddy-Current Sensing for Arbitrary Orientation Defects Detection in Carbon Steel
2020
Sensors
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The sensor consists of four identical excitation coils orthogonally arranged in an upside-down pyramid configuration and a giant magneto-resistive (GMR) detection element. ...
Results showed that the probe has the capability of detecting defects with any orientations while maintaining the same sensitivity and the defect depth can be quantitatively evaluated by using the signal ...
Sensors 2020, 20, x FOR PEER REVIEW 15 of 17 above findings indicate that the signal magnitude can be used to evaluate the defect depth, regardless of the defect orientation. ...
doi:10.3390/s20082345
pmid:32326033
fatcat:lzq3w4dyrjeopjtc23ziurxmdq
Eddy Current Inversion Models for Estimating Dimensions of Defects in Multilayered Structures
2014
Mathematical Problems in Engineering
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In eddy current nondestructive evaluation, one of the principal challenges is to determine the dimensions of defects in multilayered structures from the measured signals. ...
In experiments, the eddy current signals responding to magnetic field changes are detected by a giant magnetoresistive (GMR) sensor and preprocessed for noise elimination using a wavelet packet analysis ...
Here, a novel EC testing technique with a giant magnetoresistive (GMR) sensor is used to enhance the sensitivity and spatial resolution of the measurement [20] . ...
doi:10.1155/2014/649608
fatcat:bumpbus3kzdrhjdlzt75jwjmdi
Present and Future Impact of Magnetic Sensors in NDE
2014
Procedia Engineering
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The approach of this presentation follows some of the recent developments in the magnetic sensors technology and studies the present and future impact of the improvements in the nondestructive evaluation ...
Non Destructive Evaluation (NDE) techniques are widely used in several industries in order to control product quality or to ensure the integrity of a part. A wide variety of methods exist. ...
Acknowledgements This work was developed under the Instituto de Telecomunicações projects KeMANDE and OMEGA and supported in part by the Portuguese Science and Technology Foundation (FCT) project PEst-OE ...
doi:10.1016/j.proeng.2014.11.054
fatcat:pexxrd7vv5brrokzpkybxjuvcq
Using Excitation Invariance in the Characterization of Defects by Eddy Current Image Constructions
2014
Procedia Engineering
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In this article the eddy current method is used to characterize defects in conductive non-ferromagnetic plates. A special attention is paid to the presentation of results in the form of images. ...
An inverse problem with Tikhonov regularization is solved to obtain the two-dimensional distribution of currents inside the material under test. ...
Acknowledgment This work was developed under the Instituto de Telecomunicações projects KeMANDE and OMEGA and supported in part by the Portuguese Science and Technology Foundation (FCT) projects: PEst-OE ...
doi:10.1016/j.proeng.2014.11.057
fatcat:wj6f65ykuzevxgfwokhfbtzgke
Uniform Circular-Array-Based Borehole Pulsed Eddy-Current System for Asymmetry Defect Inspection in Downhole Casings
2022
Electronics
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Using azimuth dimension information from the synthesized UCA at a certain borehole depth, we obtained an inspection approach for the width and penetration depth of asymmetry defects in the circumferential ...
Simulations and field experiments were conducted, and the results demonstrate the effectiveness of the proposed method in inspecting asymmetry defects. ...
Acknowledgments: The authors would like to thank the reviewers for their helpful suggestions, which have considerably improved the quality of the manuscript. ...
doi:10.3390/electronics11132030
fatcat:hm3rdadtnrde5it4w5iap7fwta
Experimental validation of an eddy current probe dedicated to the multi-frequency imaging of bore holes
2012
Sensors and Actuators A-Physical
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The probe is constituted of a large inducer generating an uniformly oriented EC flow within the inspected material, and a sensing array probe featuring bobbin coils to sense the radial component of the ...
The experimental evaluation of the probe provides promising prospects for the accurate characterization of defects, by means of advanced multifrequency signal processing algorithms. ...
Acknowledgments The authors thank MM. Dessendre and Trétout from Dassault-Aviation for their help. ...
doi:10.1016/j.sna.2012.07.009
fatcat:emahwpknind63jy7rzhnfctaiq
Optimization and Validation of Rotating Current Excitation with GMR Array Sensors for Riveted Structures Inspection
2016
Sensors
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maintaining the data needed, and completing and reviewing the collection of information. ...
The public reporting burden for this collection of information is estimated to average 1 hour per response, including the time for reviewing instructions, searching existing data sources, gathering and ...
Conflicts of Interest: The authors declare no conflict of interest. ...
doi:10.3390/s16091512
pmid:27649202
pmcid:PMC5038785
fatcat:c73klpwex5gt5ogi34zbfcmrzu
Comparison of Time and Frequency Domain Features' Immunity Against Lift-off in Pulse-Compression Eddy Current Imaging
2019
Zenodo
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The imaging procedure makes use of amplitude and phase features of both frequency- and time-domain data where time-phase is defined through the Hilbert transform of the pulse-compression output. ...
It is shown that time-domain features outperform frequency-based ones in terms of SNR for the case of deeper defects and that phase features are robust against lift-off variations for both time and frequency ...
The authors acknowledge Prof. Pietro Burrascano for the useful suggestion about the optimal window function to use in the ECT pulse-compression algorithm. ...
doi:10.5281/zenodo.3778071
fatcat:uuuycjobi5hybl6hco4lj4mmmm
Development of Eddy Current Test Procedure for Non-destructive Detection of Fatigue Cracks and Corrosion in Rivets of Air-intake Structures
English
2009
Defence Science Journal
English
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This procedure is capable of reliably detecting 0.25 mm deep defects in 4 mm dia rivets and 0.75 mm deep defects in 5 mm dia rivets. Further, it is not influenced by thickness of the multilayers. ...
This paper presents an eddy current test procedure developed for reliable detection of simulated fatigue cracks and corrosion products in rivets of air-intake structures. ...
Savrekar, Chief Manager (QC), Aircraft O/H and AUR and DC, HAL, Bangalore, for providing the riveted specimens and for useful discussions. Authors are also thankful to Shri P. ...
doi:10.14429/dsj.59.1497
fatcat:ed5aln35hjbutkop7ur7zwb4iy
Extraction of Flux Leakage and Eddy Current Signals Induced by Submillimeter Backside Slits on Carbon Steel Plate using A Low-Field AMR Differential Magnetic Probe
2021
IEEE Access
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Magnetic Flux Leakage (MFL) and Eddy Current Testing (ECT) are commonly employed as the non-destructive evaluation (NDE) techniques used to detect defects within the steel. ...
The MFL technique is advantageous in terms of deep defects detection, while the ECT technique excels in providing dense information regarding defects. ...
ACKNOWLEDGMENT The authors would like to thank the Ministry of Higher ...
doi:10.1109/access.2021.3123421
fatcat:ixc7o3exw5gxlndwfwidinyuyq
Innovative concept and application of EC probe for inspection of friction stir welds
2014
International Journal of Microstructure and Materials Properties
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Acknowledgments The authors would like to acknowledge the Foundation for Science and Technology (FCT) for its financial support via the project Pest OE/EME/UI0667/2011 and PhD scholarship FCT- ...
Others promising EC variants are GMR [11] and SQUID [12] sensors: the probe has a coil to generate the induced current in the test material, and GMR or SQUID as a sensing element. ...
Device (SQUID), Giant Magnetoresistance (GMR), US Phased Array, Time of Flight Diffraction (ToFD), and digital radiography. ...
doi:10.1504/ijmmp.2014.066912
fatcat:fzw6lhc5wndhnb6xkqlumjb7mm
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