Relevant bibliographies by topics / Eddy-current probes

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  2. Dissertations / Theses
  3. Books
  4. Book chapters
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Academic literature on the topic 'Eddy-current probes'

Author: Grafiati
Published: 30 May 2022
Last updated: 31 May 2022

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Journal articles on the topic "Eddy-current probes"

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Wells Krautkramer. "Eddy current probes." NDT International 23, no. 2 (April 1990): 118–19. http://dx.doi.org/10.1016/0308-9126(90)91980-8.

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Wells Krautkramer. "Eddy current probes." NDT & E International 23, no. 2 (April 1990): 118–19. http://dx.doi.org/10.1016/0963-8695(90)91091-2.

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Cecco, V. S., and F. L. Sharp. "Probes to overcome eddy current limitations." NDT International 22, no. 3 (June 1989): 180. http://dx.doi.org/10.1016/0308-9126(89)90072-2.

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Nguyen, Phuc, Van Thuy Nguyen, Binh Duong Vuong, Minh Duc Do, Dinh Truong Trinh, Tung Khanh Do, and Quang Trung Dang. "Study, design and manufacture eddy current probes for industry applications." Nuclear Science and Technology 6, no. 2 (September 24, 2021): 52–64. http://dx.doi.org/10.53747/jnst.v6i2.157.

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This study is based on the studying, designing and manufacturing of eddy current probes for industry applications. The main tasks of this study include: + Describes the overview and classification of eddy current probes (which can be classified into three categories based on the mode of operation: absolute eddy current probe, differential eddy current probe and reflect eddy current probe). + Describes the three methods of probe designing and manufacturing (including experimental, analytical and numerical designs). + Describes the designing and manufacturing of eddy current probes for industry applications, which based on experimental and analytical methods. Based on this study, we have successfully manufactured some current probes (including absolute eddy current probe, differential eddy current probe and reflect eddy current probe) for surface and tube inspections.
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Auld, B. A., J. C. Moulder, S. Jefferies, P. J. Shull, S. Ayter, and J. Kenney. "Eddy-Current Reflection Probes: Theory and Experiment." Research in Nondestructive Evaluation 1, no. 1 (January 1989): 1–11. http://dx.doi.org/10.1080/09349848909409462.

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Auld, B. A., J. C. Moulder, S. Jeffries, P. J. Shull, and S. Ayter. "Eddy-current reflection probes: theory and experiment." NDT International 23, no. 6 (December 1990): 362. http://dx.doi.org/10.1016/0308-9126(90)90927-g.

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Chen, Guolong, Zheng Cao, and Weimin Zhang. "A Novel Planar Differential Koch Fractal Eddy Current Probe with Parallel Wound Topological Structure." Journal of Sensors 2021 (June 16, 2021): 1–13. http://dx.doi.org/10.1155/2021/6671189.

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Flexible planar eddy current probes are widely used to detect conductive components with complex surface. In this study, topological transformation is applied to design a differential Koch coil exciting eddy current probe. Two kinds of Koch exciting coils, Koch A and Koch B , were obtained by topological transformation from a three-dimensional differential exciting eddy current probe. Finite element model simulation is conducted to visualize the differences of eddy current distributions induced by the probes and get the defect signal. A detailed comparison is made among the two kinds of Koch eddy current probes and a circular eddy current probe by experiments. The experiments demonstrate that the sensitivity of the Koch A eddy current probe is higher than that of another two probes for detecting the defect which is shorter than the size of the probe. This work provides a novel method for improving the performance of eddy current probes in the coil structure design.
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Kim, Young Joo, Bong Young Ahn, Ki Bok Kim, and Young Gil Kim. "Multi-Coil Eddy Current Probe for the Detection of Circumferential Cracks in Tubing." Key Engineering Materials 321-323 (October 2006): 505–8. http://dx.doi.org/10.4028/www.scientific.net/kem.321-323.505.

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Conventional eddy current bobbin probes, multi-pancake and/or rotating pancake probes, and transmit-receive eddy current probes are currently utilized in testing metal tubing. Each method has respective strengths and weaknesses. This paper proposes another eddy current probe with new features. The structure is designed to be sensitive to circumferential cracks, which are not easily detected with ordinary bobbin coil probes. The directions of the magnetic field and the eddy current around the coil were considered in design of the probe structure. Signals of these probes from the artificial defects were acquired and analyzed. Experimental results show that the developed probes are more sensitive to circumferential defects than comparable ordinary bobbin probes. In addition, the new probes are insensitive to axial defects. By employing both the new probes and ordinary bobbin probes, more reliable ECT can be performed.
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Yin, Wuliang, Mingyang Lu, Liyuan Yin, Qian Zhao, Xiaobai Meng, Zhijie Zhang, and A. Peyton. "Acceleration of eddy current computation for scanning probes." Insight - Non-Destructive Testing and Condition Monitoring 60, no. 10 (October 1, 2018): 547–55. http://dx.doi.org/10.1784/insi.2018.60.10.547.

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Mayos, M., and J. L. Muller. "Geometrically anisotropic probes: an improved eddy current technique." Journal of Nondestructive Evaluation 6, no. 2 (June 1987): 109–16. http://dx.doi.org/10.1007/bf00568889.

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Dissertations / Theses on the topic "Eddy-current probes"

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Светличный, Виталий Анатольевич. "Резонансная вихретоковая дефектоскопия тонких неферомагнитных пленок." Thesis, Харьковский национальный университет радиоэлектроники, 2015. http://repository.kpi.kharkov.ua/handle/KhPI-Press/17672.

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Диссертация на соискание научной степени кандидата технических наук по специальности 05.11.13 - приборы и методы контроля и определения состава веществ. – Харьковский национальный университет радиоэлектроники, Харьков, 2015 г. Диссертация посвящена разработке метода и прибора для эффективного контроля дефектов структуры тонких неферромагнитных пленок. Рассмотрены общие положения применения вихретоковых преобразователей в дефектоскопии. Показаны характерные общие принципы построения вихретоковых дефектоскопов. Указаны направления улучшения метрологических показателей вихретоковых дефектоскопов тонких пленок. Выполнен анализ дефектов структуры тонких неферромагнитных пленок и методов контроля качества. Проведен анализ характеристик апериодических ВТП, способных выявлять указанные дефекты. Уточнена теория апериодических ВТП с учетом анализа влияния на характеристики преобразования внутреннего сопротивления источников питания и параметров нагрузки. Выполнен анализ характеристик вихретоковых резонансных ВТП предназначенных для выявления дефектов тонких неферромагнитных пленок. Рассмотрены различные режимы работы ВТП с учетом внутреннего сопротивления источника питания и сопротивления нагрузки, способы подключения ВТП к источнику и т.д. Выполнен анализ характеристик, даны сравнительная оценка и рекомендации, обосновавшие схемные решения и параметры ВТП. Доказаны преимущества резонансных ВТП относительно апериодических. Проведен анализ факторов, влияющих на точность выявления дефектов тонких неферромагнитных пленок средствами высокочастотной резонансной вихретоковой дефектоскопии. Показано, что одним из основных факторов, влияющих на точность измерений в резонансной вихретоковой дефектоскопии, является нестабильность рабочего зазора ВТП. Предложен вариант компенсации влияния изменения рабочего зазора при использовании резонансного ВТП накладного типа, работающего на двух различных частотах. Разработан способ резонансной дефектоскопии, позволяющий улучшить выявление дефектов в тонких неферромагнитных пленках. Исследована модель оценки взаимодействия резонансного ВТП с неферромагнитной тонкой пленкой. Приведены аналитические соотношения, проведены расчеты зависимости выходного сигнала от параметров ВТП. Для практического подтверждения аналитических положений работы выполнены экспериментальные исследования: влияние отдельных параметров резонансного ВТП на его основную характеристику преобразования; выбор рабочей частоты; поиск наиболее целесообразного способа создания компенсационного напряжения; уточнение особенностей работы трансформаторных ВТП на цилиндрических и плоских катушках; выбор типа ВТП и схемы его включения. Создан дефектоскоп, позволяющий выявлять дефекты структуры тонких неферромагнитных пленок.
Dissertation for the degree of Ph. D. in Engineering Science, specialty 05.11.13 – devices and methods of control and determination of the composition of substances. – Kharkov National University of Radio Electronics, Kharkov, 2015. The dissertation is devoted to the development of methods and instruments for the effective control of defects imperfections film structure The analysis of the characteristics of various ECP capable of detecting these defects. Considering the various modes of operation, taking into account the internal resistance of the power supply and the load resistance, how to connect to a power source ECP. Developed a way to improve the detection of defects in non–ferromagnetic thin films. A model to assess the interaction with non–ferromagnetic resonance ECP thin film. These analytical ratios were calculated according to the output signal from the parameters of the ECP. For experimental research laboratory prototype was manufactured eddy–current flaw detector by which to check whether the calculation of the theoretical and experimental relations.
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Світличний, Віталій Анатолійович. "Резонансна вихрострумова дефектоскопія тонких неферомагнітних плівок." Thesis, НТУ "ХПІ", 2015. http://repository.kpi.kharkov.ua/handle/KhPI-Press/17663.

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Дисертація на здобуття наукового ступеня кандидата технічних наук за спеціальністю 05.11.13 - прилади і методи контролю та визначення складу речовин. – Харківський національний університет радіоелектроніки, Харків, 2015 р. Дисертація присвячена розробці методу і приладу для ефективного контролю дефектів структури тонких неферомагнітних плівок. Проведено аналіз характеристик різних ВСП, здатних виявляти зазначені дефекти. Розглянуті різні режими роботи з урахуванням внутрішнього опору джерела живлення і опору навантаження, способи підключення ВСП до джерела живлення. Розроблено спосіб, що дозволяє поліпшити виявлення дефектів у тонких неферомагнітних плівках. Досліджено модель оцінки взаємодії резонансного ВСП з неферомагнітною тонкою плівкою. Наведено аналітичні співвідношення, проведено розрахунки залежності вихідного сигналу від параметрів ВСП. Для експериментальних досліджень був виготовлений лабораторний макет вихрострумового дефектоскопа, за допомогою якого здійснювалася перевірка відповідності розрахункових теоретичних співвідношень з експериментальними.
Dissertation for the degree of Ph. D. in Engineering Science, specialty 05.11.13 – devices and methods of control and determination of the composition of substances. – Kharkov National University of Radio Electronics, Kharkov, 2015. The dissertation is devoted to the development of methods and instruments for the effective control of defects imperfections film structure The analysis of the characteristics of various ECP capable of detecting these defects. Considering the various modes of operation, taking into account the internal resistance of the power supply and the load resistance, how to connect to a power source ECP. Developed a way to improve the detection of defects in non–ferromagnetic thin films. A model to assess the interaction with non–ferromagnetic resonance ECP thin film. These analytical ratios were calculated according to the output signal from the parameters of the ECP. For experimental research laboratory prototype was manufactured eddy–current flaw detector by which to check whether the calculation of the theoretical and experimental relations.
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Simon, Lilian [Verfasser]. "Direct and inverse transient eddy current problems / Lilian Simon." Mainz : Universitätsbibliothek Mainz, 2014. http://d-nb.info/1061142264/34.

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Lee, Eunjung. "FOSLL* for eddy current problems with three-dimensional edge singularities." Diss., Connect to online resource, 2005. http://wwwlib.umi.com/dissertations/fullcit/3178348.

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Travis, Clive Hathaway. "The inverse problem and applications to optical and eddy current imaging." Thesis, University of Surrey, 1989. http://epubs.surrey.ac.uk/804869/.

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Adams, Leila. "Finite element method using vector finite elements applied to eddy current problems." Master's thesis, University of Cape Town, 2011. http://hdl.handle.net/11427/9992.

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Vector fields found in electromagnetics are fundamentally different to vector fields found in other research areas such as structural mechanics. Electromagnetic vector fields possess different physical behaviour patterns and different properties in comparison to the other vector fields and therein lies the necessity of the development of a finite element which would be able to cater for these differences . The vector finite element was then developed and used within the finite element method specifically for the approximation of electromagnetic problems. This dissertation investigates the partial differential equation that governs eddy current behaviour. A finite element algorithm is coded and used to solve this partial differential equation and produce vector field simulations for fundamental eddy current problems.
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Wilson, Michelle Lynn. "Design and Fabrication of an Electromagnetic Probe for Biomedical Applications." The Ohio State University, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=osu1313509778.

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Jiang, Zixian. "Some inversion methods applied to non-destructive testings of steam generator via eddy current probe." Palaiseau, Ecole polytechnique, 2014. http://pastel.archives-ouvertes.fr/docs/00/94/36/13/PDF/Thesis.pdf.

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L'objectif principal de cette thèse est de proposer et de tester quelques méthodes de l'optimisation de forme afin d'identifier et de reconstruire des dépôts qui couvrent la paroi extérieure d'un tube conducteur dans un générateur de vapeurs en utilisant des signaux courant de Foucault. Ce problème est motivé par des applications industrielles en contrôle non-destructive dans le secteur de l'énergie nucléaire. En fait, des dépôts peuvent obstruer le passage de circuit de refroidissement entre les tubes et les plaques entretoises qui les soutiennent, ce qui entraînerait une baisse de productivité et mettrait la structure en danger. On considère dans un premier temps un cas axisymétrique dans le cadre duquel on construit un modèle 2-D par des équations aux dérivées partielles pour le courant de Foucault, ce qui nous permet ensuite de reproduire des mesures d'impédances qui correspondent en réalité les signaux courants de Foucault. Pour réduire le coût de calculs de la simulation numérique, on tronque le domaine du problème en posant des conditions aux bords artificielles basées sur des études sur le comportement de la solution, notamment sur un calcul semi-analytique de l'opérateur Dirichlet-to-Neumann dans la direction axiale. Pour la partie identification et reconstruction, on distingue deux sortes de dépôts et établit pour chacun une méthode d'inversion spécifique. Le premier cas concernent des dépôts dont la conductivité est relativement faible (d'environs 1. E4 S/m). On utilise la méthode d'optimisation de forme qui consiste à exprimer explicitement la dérivée des mesures d'impédance par rapport au domaine du dépôt en fonction d'une déformation et à représenter le gradient d'un fonctionnel de coût à minimiser par l'intermédiaire d'un état adjoint proprement défini. Motivée par la présence des dépôts et des plaques de maintient non-axisymétriques, on fait aussi une extension en 3-D des méthodes précédentes. Pour le deuxième cas, des dépôts sont fortement conducteurs et sous forme de couche mince d'une épaisseur de l'ordre de micron. La méthode adaptée à la première sorte de dépôts devient ici trop coûteuse à cause du degré de liberté très élevé des éléments finis sur un maillage extrêmement raffiné à l'échelle de la couche mince. Pour relever cette difficulté, les études sont portées sur plusieurs modèles asymptotiques qui remplace la couche mince par des conditions d'interface sur la surface du tube portante du dépôt. Le nom de modèle asymptotique vient du fait que les conditions d'interface effectives sont obtenues par le développement asymptotique de la solution en fonction d'un paramètre caractérisant la conductivité et l'épaisseur de la couche mince. La validation numérique a permis de retenir un modèle asymptotique qui est à la fois suffisamment précis et simple à inverser. L'inversion (recherche de l'épaisseur du dépôt) consiste alors à rechercher des paramètres dans les conditions d'interface (non standard). Pour les deux cas, la validation et des exemples numériques sont proposés pour le modèle direct et l'inversion
The main objective of this thesis is to propose and test some shape optimization techniques to identify and reconstruct deposits at the shell side of conductive tubes in steam generators using signals from eddy current coils. This problem is motivated by non-destructive testing applications in the nuclear power industry where the deposit clogging the cooling circuit may affect power productivity and structural safety. We consider in a first part an axisymmetric case for which we set the model by establishing a 2-D differential equation describing the eddy current phenomenon, which enable us to simulate the impedance measurements as the observed signals to be used in the inversion. To speed up numerical simulations, we discuss the behavior of the solution of the eddy current problem and build artificial boundary conditions, in particular by explicitly constructing DtN operators, to truncate the domain of the problem. In the deposit reconstruction, we adapt two different methods according to two distinct kinds of deposits. The first kind of deposit has relatively low conductivity (about 1e4 S/m). We apply the shape optimization method which consists in expliciting the signal derivative due to a shape perturbation of the deposit domain and to build the gradient by using the adjoint state with respect to the derivative and the cost functional. While for the second kind of deposit with high conductivity (5. 8e7 S/m) but in the form of thin layer (in micrometers), the previous method encounter a high numerical cost due to the tiny size of the mesh used to model the layer. To overcome this difficulty, we build an adapted asymptotic model by appropriately selecting the the family of effective transmissions conditions on the interface between the deposit and the tube. The name of the asymptotic model is due to the fact that the effective transmissions conditions are derived from the asymptotic expansion of the solution with respect to a small parameter "delta" characterizing the thickness of the thin layer and the conductivity behavior. Then the inverse problem consists in reconstructing the parameters representing the layer thickness of the deposit. For both of the two approaches, we validate numerically the direct and inverse problems. In a second part we complement this work by extending the above methods to the 3-D case for a non-axisymmetric configuration. This is motivated by either non axisymmetric deposits or the existence of non axisymmetric components like support plates of steam generator tubes
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Girardon, Hugo. "Shape reconstruction of deposits inside a steam generator using eddy current measurements." Thesis, Institut polytechnique de Paris, 2020. http://www.theses.fr/2020IPPAX086.

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Le contrôle non destructif est un outil essentiel pour évaluer la sûreté des infrastructures dans les centrales nucléaires. En particulier, la présence de dépôts conducteurs dans les tubes en U des générateurs de vapeur constitue un enjeu de la sûreté en bloquant le circuit d'eau secondaire. Pour détecter ces dépôts, des sondes à courants de Foucault sont insérées dans les tubes en U pour générer des courants et mesurer en retour un signal d'impédance. Pour inverser ces mesures et reconstruire la forme du dépôt, nous développons une méthode d'optimisation de forme avec descente de gradient régularisée. Du fait du caractère inconnu et possiblement complexe de la géométrie et de la topologie du dépôt, nous nous proposons de le modéliser par le biais d'une fonction level-set. La méthodologie est validée dans un premier temps sur des configurations axisymétriques artificielles et une rapide convergence est assurée par un choix réfléchi des paramètres de régularisation ainsi qu'une adaptation fine des pas de descente. En nous appuyant sur la configuration réelle dans laquelle sont réalisées les mesures expérimentales, nous considérons ensuite une modélisation plus réaliste incorporant la plaque entretoise ainsi que la présence d'imperfections sur la paroi intérieure du tube. Plus précisément, nous utilisons un modèle asymptotique pour prendre en compte ces imperfections et nous les traitons comme de nouvelles inconnues dans notre problème inverse. Une stratégie d'optimisation multi-critères se basant sur l'utilisation de différentes fréquences est ensuite développée pour résoudre le problème. Nous présentons différents résultats numériques sur des tests artificiels ou réels pour montrer la validité de note approche. Nous nous focalisons ensuite sur la transposition du modèle 2D-axisymétrique à des configurations 3D plus génériques. La résolution des équations de Maxwell en présence de courants de Foucault en 3D pose plusieurs problèmes de modélisation de part le choix de la formulation du problème ainsi que des coûts de calculs conséquents à réduire avant de pouvoir élaborer l'algorithme de reconstruction. Avec l'expérience acquise dans la reconstruction en 2D-axisymétrique, nous proposons ensuite une stratégie d'inversion efficace que nous mettons en œuvre sur des données artificielles 3D. La validation des exemples numériques prouve ainsi la faisabilité de l'inversion pour des problèmes de taille conséquente pour des coûts modérés et avec une bonne précision et robustesse par rapport au bruit et aux erreurs de modélisation
Non-destructive testing is an essential tool to assess the safety of the facilities within nuclear power plants. In particular, conductive deposits on U-tubes in steam generators constitute a safety issue as they may block the cooling loop. To detect these deposits, eddy-current probes are introduced inside the U-tubes to generate currents and measuring back an impedance signal. We develop a shape optimization technique with regularized gradient descent to invert these measurements and recover the deposit shape. To deal with the unknown geometry, and its possibly complex topological nature, we propose to model it using a level set function.The methodology is first validated on synthetic axisymmetric configurations and fast convergence is ensured by careful adaptation of the gradient steps and regularization parameters. Using the actual domain, from which the acquisitions are made, we then consider a more realistic modeling that incorporates the support plate and the presence of imperfections on the tube interior section. We employ in particular an asymptotic model to take into account these imperfections and treat them as additional unknowns in our inverse problem. A multi-objective optimization strategy, based on the use of different operating frequencies, is then developed to solve this problem. We present various numerical examples with synthetic and experimental data showing the viability of our approach.The focus is then placed on the transposition of the 2D-axisymmetric work to more generic 3D configurations. Solving Maxwell eddy-current equations in 3D raises modeling issues related to the choice of the problem formulation as well as high computational costs that need to be reduced before discussing the reconstruction algorithm. Using the knowledge acquired with 2D-axisymmetric reconstruction, an efficient inversion strategy is then proposed and implemented on 3D synthetic data. Validating numerical examples demonstrate the feasibility of the inversion even for large data at a relatively moderate cost and with good accuracy and robustness with respect to noise and modeling errors
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Dekdouk, Bachir. "Image reconstruction of low conductivity material distribution using magnetic induction tomography." Thesis, University of Manchester, 2011. https://www.research.manchester.ac.uk/portal/en/theses/image-reconstruction-of-low-conductivity-material-distribution-using-magnetic-induction-tomography(44d6769d-59b1-44c2-a01e-835f8916f69c).html.

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Magnetic induction tomography (MIT) is a non-invasive, soft field imaging modality that has the potential to map the electrical conductivity (σ) distribution inside an object under investigation. In MIT, a number of exciter and receiver coils are distributed around the periphery of the object. A primary magnetic field is emitted by each exciter, and interacts with the object. This induces eddy currents in the object, which in turn create a secondary field. This latter is coupled to the receiver coils and voltages are induced. An image reconstruction algorithm is then used to infer the conductivity map of the object. In this thesis, the application of MIT for volumetric imaging of objects with low conductivity materials (< 5 Sm-1) and dimensions < 1 m is investigated. In particular, two low conductivity applications are approached: imaging cerebral stroke and imaging the saline water in multiphase flows. In low conductivity applications, the measured signals are small and the spatial sensitivity is critically compromised making the associated inverse problem severely non-linear and ill-posed.The main contribution from this study is to investigate three non-linear optimisation techniques for solving the MIT inverse problem. The first two methods, namely regularised Levenberg Marquardt method and trust region Powell's Dog Leg method, employ damping and trust region strategies respectively. The third method is a modification of the Gauss Newton method and utilises a damping regularisation technique. An optimisation in the convergence and stability of the inverse solution was observed with these methods compared to standard Gauss Newton method. For such non linear treatment, re-evaluation of the forward problem is also required. The forward problem is solved numerically using the impedance method and a weakly coupled field approximation is employed to reduce the computation time and memory requirements. For treating the ill-posedness, different regularisation methods are investigated. Results show that the subspace regularisation technique is suitable for absolute imaging of the stroke in a real head model with synthetic data. Tikhonov based smoothing and edge preserving regularisation methods also produced successful results from simulations of oil/water. However, in a practical setup, still large geometrical and positioning noise causes a major problem and only difference imaging was viable to achieve a reasonable reconstruction.
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Books on the topic "Eddy-current probes"

1

Omoniyi, Joseph Ade. Reflection-type probes for eddy current flaw detection in steel. Uxbridge: Brunel University, 1986.

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Morgan, Wang, and United States. National Aeronautics and Space Administration., eds. Study of eddy current probes: Final report. [Washington, DC: National Aeronautics and Space Administration, 1992.

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Morgan, Wang, and United States. National Aeronautics and Space Administration., eds. Study of eddy current probes: Final report. [Washington, DC: National Aeronautics and Space Administration, 1992.

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Technique for temperature compensation of eddy-current proximity probes. [Washington, D.C.]: National Aeronautics and Space Administration, Scientific and Technical Information Division, 1989.

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R, Pate J., U.S. Nuclear Regulatory Commission. Office of Nuclear Regulatory Research. Division of Engineering Technology., and Oak Ridge National Laboratory, eds. Evaluation and field validation of eddy-current array probes for steam generator tube inspection. Washington, DC: Division of Engineering Technology, Office of Nuclear Regulatory Research, U.S. Nuclear Regulatory Commission, 1996.

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V, Dodd C., U.S. Nuclear Regulatory Commission. Office of Nuclear Regulatory Research. Division of Engineering Technology., and Oak Ridge National Laboratory, eds. Computer programs for the acquisition and analysis of eddy-current array probe data. Washington, DC: Division of Engineering Technology, Office of Nuclear Regulatory Research, U.S. Nuclear Regulatory Commission, 1996.

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Nguyen, Quang Huy. Modeling the differential eddy current probe for steam generator tubing inspections using Z parameters. 1993.

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Epstein, Charles M. Electromagnetism. Edited by Charles M. Epstein, Eric M. Wassermann, and Ulf Ziemann. Oxford University Press, 2012. http://dx.doi.org/10.1093/oxfordhb/9780198568926.013.0001.

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This article elucidates on the concept of electromagnetism and electromagnetic induction with a view to explaining the theory of magnetic stimulation, used to cure diseases in human beings. Magnetic stimulation follows the principles of electromagnetism. A changing primary current induces secondary currents, which are called eddy currents, in the nearby conductors (human tissue in this case). The strength of the electric field is measured by its electromotive force (emf), which in turn, is measured in volts. The changing primary current also gives rise to an induced voltage in the primary loop itself. The essential circuitry of a magnetic stimulator is composed of three elements, the capacitor, inductance of the stimulation coil, and a switch to connect them. This article also explains the process of the energy flow system through the inductor-capacitor system, applying this principle to the biphasic TMS pulse.
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Book chapters on the topic "Eddy-current probes"

1

Bowler, Nicola. "Probes." In Eddy-Current Nondestructive Evaluation, 141–66. New York, NY: Springer New York, 2019. http://dx.doi.org/10.1007/978-1-4939-9629-2_8.

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Vernon, Susan N., and John M. Liu. "Flexible Eddy Current Probes." In Review of Progress in Quantitative Nondestructive Evaluation, 1009–16. Boston, MA: Springer US, 1993. http://dx.doi.org/10.1007/978-1-4615-2848-7_129.

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Michael, D. H., P. G. Williams, F. Toufic, and R. Collins. "Surface Distributions for Eddy Current Probes." In Review of Progress in Quantitative Nondestructive Evaluation, 259–69. Boston, MA: Springer US, 1986. http://dx.doi.org/10.1007/978-1-4615-7763-8_28.

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Shull, P. J., T. E. Capobianco, and J. C. Moulder. "Design and Characterization of Uniform Field Eddy Current Probes." In Review of Progress in Quantitative Nondestructive Evaluation, 695–703. Boston, MA: Springer US, 1987. http://dx.doi.org/10.1007/978-1-4613-1893-4_78.

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Thevenot, F., M. Dessendre, and H. Trétout. "Characterization of the Electromagnetic Field Generated by Eddy Current Probes." In Review of Progress in Quantitative Nondestructive Evaluation, 981–87. Boston, MA: Springer US, 1997. http://dx.doi.org/10.1007/978-1-4615-5947-4_128.

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Capobianco, T. E. "Field Mapping and Performance Characterization of Commercial Eddy Current Probes." In Review of Progress in Quantitative Nondestructive Evaluation, 687–94. Boston, MA: Springer US, 1987. http://dx.doi.org/10.1007/978-1-4613-1893-4_77.

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Nakagawa, N., K. Dasoju, T. A. Khan, and J. C. Moulder. "Modeling Eddy Current Crack Signals of Differential and Reflection Probes." In Review of Progress in Quantitative Nondestructive Evaluation, 209–13. Boston, MA: Springer US, 1998. http://dx.doi.org/10.1007/978-1-4615-5339-7_26.

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Burkhardt, Gary L., Jay L. Fisher, Jeffrey S. Stolte, Steven R. Kramer, and Kevin L. Cobble. "NDE of Aging Aircraft Structure Using Orthogonal-Axis Eddy Current Probes." In Review of Progress in Quantitative Nondestructive Evaluation, 1021–27. Boston, MA: Springer US, 1997. http://dx.doi.org/10.1007/978-1-4615-5947-4_133.

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Sharma, Sarit, Ibrahim Elshafiey, Lalita Udpa, and Satish Udpa. "Finite Element Modeling of Eddy Current Probes for Edge Effect Reduction." In Review of Progress in Quantitative Nondestructive Evaluation, 201–8. Boston, MA: Springer US, 1997. http://dx.doi.org/10.1007/978-1-4615-5947-4_26.

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Moulder, J. C., M. W. Kubovich, M. S. Hughes, S. Mitra, and A. Degeratu. "Calibration and Characterization of Eddy Current Probes by Photoinductive Field Mapping." In Review of Progress in Quantitative Nondestructive Evaluation, 1161–68. Boston, MA: Springer US, 1992. http://dx.doi.org/10.1007/978-1-4615-3344-3_150.

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Conference papers on the topic "Eddy-current probes"

1

Polyahov, M. Y. "Impulse excitation of eddy current probes." In 26th Annual review of progress in quantitative nondestrictive evaluation. AIP, 2000. http://dx.doi.org/10.1063/1.1306087.

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Benson, Craig W. "“Footprint” assessment of eddy current probes." In The 27th annual review of progress in quantitative nondestructive evaluation. AIP, 2001. http://dx.doi.org/10.1063/1.1373997.

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Buvat, F. "Eddy-Current Modeling of Ferrite-Cored Probes." In REVIEW OF PROGRESS IN QUANTITATIVE NONDESTRUCTIVE EVALUATION. AIP, 2005. http://dx.doi.org/10.1063/1.1916712.

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Gilles-Pascaud, C. "Eddy Current Flexible Probes for Complex Geometries." In QUANTITATIVE NONDESTRUCTIVE EVALUATION. AIP, 2006. http://dx.doi.org/10.1063/1.2184556.

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Sabbagh, Harold A. "Recent advances in modeling eddy-current probes." In QUANTITATIVE NONDESTRUCTIVE EVALUATION. AIP, 2002. http://dx.doi.org/10.1063/1.1472829.

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Sabbagh, Harold A., R. Kim Murphy, Elias H. Sabbagh, John C. Aldrin, Marcus Johnson, Donald O. Thompson, and Dale E. Chimenti. "CHARACTERIZING AND MODELING ARRAYS OF EDDY-CURRENT PROBES." In REVIEW OF PROGRESS IN QUANTITATIVE NONDESTRUCTIVE EVALUATION: Volume 30A; Volume 30B. AIP, 2011. http://dx.doi.org/10.1063/1.3591873.

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Rao, B. P. C. "An Approach for Characterization of Eddy Current Probes." In REVIEW OF PROGRESS IN QUANTITATIVE NONDESTRUCTIVE EVALUATION. AIP, 2005. http://dx.doi.org/10.1063/1.1916711.

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Hughes, R., Y. Fan, and S. Dixon. "Investigating electrical resonance in eddy-current array probes." In 42ND ANNUAL REVIEW OF PROGRESS IN QUANTITATIVE NONDESTRUCTIVE EVALUATION: Incorporating the 6th European-American Workshop on Reliability of NDE. AIP Publishing LLC, 2016. http://dx.doi.org/10.1063/1.4940538.

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Brady, S. K., and D. D. Palmer. "Handheld, giant magnetoresistive-sensor-based eddy current probes." In REVIEW OF PROGRESS IN QUANTITATIVE NONDESTRUCTIVE EVALUATION: Volume 31. AIP, 2012. http://dx.doi.org/10.1063/1.4716253.

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Junjun Xin, Naiguang Lei, Lalita Udpa, and Satish Udpa. "Nondestructive inspection using Rotating Field Eddy Current (RoFEC) Probes." In 2010 14th Biennial IEEE Conference on Electromagnetic Field Computation (CEFC 2010). IEEE, 2010. http://dx.doi.org/10.1109/cefc.2010.5481873.

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Reports on the topic "Eddy-current probes"

1

Ivanov, Plamen Alexandroz. Remote Field Eddy Current Probes for the Detection of Stress Corrosion in Transmission Pipelines. Office of Scientific and Technical Information (OSTI), January 2002. http://dx.doi.org/10.2172/804540.

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Dodd, C. V., and J. R. Pate. Evaluation and field validation of Eddy-Current array probes for steam generator tube inspection. Office of Scientific and Technical Information (OSTI), July 1996. http://dx.doi.org/10.2172/273824.

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Pitner, A. L. Acceptance testing of the eddy current probes for measurement of aluminum hydroxide coating thickness on K West Basin fuel elements. Office of Scientific and Technical Information (OSTI), August 1998. http://dx.doi.org/10.2172/362554.

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Turner, L. R., K. Davey, N. Ida, D. Rodger, A. Kameari, A. Bossavit, and C. R. I. Emson. Workshops and problems for benchmarking eddy current codes. Office of Scientific and Technical Information (OSTI), August 1988. http://dx.doi.org/10.2172/7179128.

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Chang, F. C., S. Bakhtiari, and D. Kupperman. Modeling of eddy current NDE probe for steam generator tubes. Office of Scientific and Technical Information (OSTI), January 2003. http://dx.doi.org/10.2172/808427.

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Bakhtiari, S., and D. S. Kupperman. Modeling of eddy current probe response for steam generator tubes. Office of Scientific and Technical Information (OSTI), December 1996. http://dx.doi.org/10.2172/414381.

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Knopp, Jeremy S., Mark P. Blodgett, and R. D. Mooers. Model Based Studies of the Split D Differential Eddy Current Probe (Preprint). Fort Belvoir, VA: Defense Technical Information Center, November 2011. http://dx.doi.org/10.21236/ada553680.

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Pate, J. R., and C. V. Dodd. Computer programs for the acquisition and analysis of eddy-current array probe data. Office of Scientific and Technical Information (OSTI), July 1996. http://dx.doi.org/10.2172/288902.

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