Novel Coupled Electric Field Method for Defect Characterization in Eddy Current Non-destructive Testing Systems

Bouchala, Tarik; Abdelhadi, B.; Benoudjit, A.

doi:10.1007/s10921-013-0197-5

Cited by 8 publications

(8 citation statements)

References 14 publications

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“…The electromagnetic phenomenon intervening in eddy current non-destructive systems is described by the following generalized punctual Eqns. [9][10][11][12][13][14][15].…”

Section: Coupled Electric Field Methodsmentioning

confidence: 99%

“…In a concrete study, when using eddy current to measure non conductive coating thickness, it is important to ensure that the other factors are kept under control. A pancake-type probe formed of coil used whose axis is perpendicular to the surface of the tested piece [10][11][12][13][14][15][16]. This type of sensor is used for flat surface inspections, Figure 2.…”

Section: Studied Devicementioning

confidence: 99%

See 1 more Smart Citation

Nondestructive Eddy Current Measurement of Coating Thickness of Aeronautical Construction Materials

Abdou¹,

Bouchala²,

Abdelhadi³

et al. 2019

I2M

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This paper puts forward a novel nondestructive method to measure the coating thickness of aeronautical construction materials (e.g. Al, AU4G, Ti and Inox 304L) using the eddy current. First, the forward model of the coupled electric field method was adopted to facilitate the eddy current measurement the coating thickness. The forward model was applied in Matlab simulation. Based on the simulation results, the authors examined the effects of nonconductive coating thickness on sensor impedance component such as amplitude, resistance and reactance. On this basis, an inverse algorithm was developed and coupled with the forward model, and verified through experiments. The results show that our method can measure the coating thickness of aeronautical construction materials rapidly at a high precision. The method has great potential for automated industrial applications.

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“…The electromagnetic phenomenon intervening in eddy current non-destructive systems is described by the following generalized punctual Eqns. [9][10][11][12][13][14][15].…”

Section: Coupled Electric Field Methodsmentioning

confidence: 99%

Section: Studied Devicementioning

confidence: 99%

Nondestructive Eddy Current Measurement of Coating Thickness of Aeronautical Construction Materials

Abdou¹,

Bouchala²,

Abdelhadi³

et al. 2019

I2M

View full text Add to dashboard Cite

show abstract

“…In order to minimise the computation cost without compromising the accuracy, some authors propose a refinement of algorithms of problem inversion with design-of-experiment sampling, response-surface fitting [118], and neuron networks [122], The possible presence of several local extrema of the response function requires global optimization procedures, like genetic algorithms or artificial neural networks. The networks are first 'trained' using signals from a wide and possibly exhaustive range of defect shapes.…”

Section: Solutions Of Inverse Problemsmentioning

confidence: 99%

“…The networks are first 'trained' using signals from a wide and possibly exhaustive range of defect shapes. To have a sufficient number of cases, training datasets are often generated using numerical simulations [122]. Genetic algorithms can efficiently be used in conjunction with FEM of the forward problem.…”

Section: Solutions Of Inverse Problemsmentioning

confidence: 99%

Finite Element Method Applied in Electromagnetic NDTE: A Review

Augustyniak

Usarek

2016

J Nondestruct Eval

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The paper contains an original comprehensive review of finite element analysis (FEA) applied by researchers to calibrate and improve existing and developing electromagnetic non-destructive testing and evaluation techniques, including but not limited to magnetic flux leakage (MFL), eddy current testing, electromagnetic-acoustic transducers (EMATs). Premium is put on the detection and modelling of magnetic field, as the vast majority of ENDT involves magnetic induction, either as a primary variable MFL or a complementary phenomenon (EC, EMATs). FEA is shown as a fit-for-purpose tool to design, understand and optimise ENDT systems, or a Reference for other modelling algorithms. The review intentionally omits the fundamentals of FEA and detailed principles of NDT. Strain-stress FEA applications in NDT, especially in ultrasonography and hole-drilling methodology, deserve as well a separate study.

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“…The value of these impedance changes depends on many parameters relating to the defect itself (geometric dimensions, location), the probe used (shape, excitation frequency, number of turns) and the tested material (electrical conductivity, magnetic permeability). The employment of an air-cored coil as a probe for detecting flaws in conductors was analysed for magnetic [6][7][8][9] and non-magnetic [10][11][12][13][14] materials. What is commonly used in the process of interpreting the changes in the coil impedance are mathematical models which make it possible to carry out simulations of the tests being done.…”

Section: Introductionmentioning

confidence: 99%

Locating Defects in Conductive Materials Using the Eddy Current Model of the Filamentary Coil

Tytko

2021

J Nondestruct Eval

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This article presents an innovative technique for detecting flaws in conductive materials by using an ideal filamentary coil. To characterize such a coil accurately and explicitly, it is sufficient to be in possession of merely two parameters: the radius of the circle within which all the turns are located and the distance of the coil from the tested surface. The mathematical model derived using the truncated region eigenfunction expansion method enables the calculation of the changes in the components of the filamentary coil impedance that are the result of positioning the coil close to the conductive material with a hole. Because of this, the air-cored coil model can be replaced with a much simpler filamentary coil model. This solution makes it is possible to detect various types of holes (internal, surface, subsurface or through) occurring in both multilayer magnetic and non-magnetic materials. The derived results were verified by means of measurements and numerical calculations based on the finite element method. Very good agreement was observed in both cases. The paper contains the source code implemented in Matlab, which is used to for calculations.

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Novel Coupled Electric Field Method for Defect Characterization in Eddy Current Non-destructive Testing Systems

Cited by 8 publications

References 14 publications

Nondestructive Eddy Current Measurement of Coating Thickness of Aeronautical Construction Materials

Nondestructive Eddy Current Measurement of Coating Thickness of Aeronautical Construction Materials

Finite Element Method Applied in Electromagnetic NDTE: A Review

Locating Defects in Conductive Materials Using the Eddy Current Model of the Filamentary Coil

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