Advanced Magnetodynamic and Electromagnetic Problems

Placko, Dominique; Liebeaux, N.

doi:10.1002/9780470142400.ch6

Cited by 2 publications

(2 citation statements)

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“…DPSM is considered as a semianalytical method. DPSM was initially developed at ENS Cachan by Placko and his associates in 2000, for solving electromagnetic and electrostatic ( [23], [24]) 3D problems. This method was then extended to solve ultrasonic problems, in collaboration with Kundu and his associates, at the University of Arizona ( [25], [26]).…”

Section: Dpsm Modeling and Application To Electrostaticmentioning

confidence: 99%

Theoretical and experimental study of a time-domain-reflectometry (TDR) probe used for water content measurement of clayrock through their electromagnetic properties

Boré

Placko

Taillade³

et al. 2013

SPIE Proceedings

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The use of electromagnetic sensors such as Time Domain Reflectometry (TDR) probes has gained increasing importance for water content measurements since several years, for long term monitoring of structures, among which radioactive waste repositories. TDR probes are basically sensitive to electromagnetic properties of the host material, clayrock in our case Prior to perform in-situ experiments with TDR probes, it is mandatory to have an accurate knowledge of the electromagnetic properties of clayrock as a function of their water content. We developed a new laboratory dielectric measurement device, consisting of a coaxial transmission line, enabling characterization of intact clayrock permittivity over the 50 MHz -1 GHz frequency range. The study has shown a large variation of complex permittivity with (i) water content, the parameter of interest and (ii) frequency. The frequency dependence is induced by different relaxation processes. In a second step, these data are introduced in an original semi analytical model (Distributed Points Sources Method) in order to obtain a reliable modeling of the TDR probe. Taking into account some experimental aspects of the TDR probe, we propose to introduce a in this paper the effect of an air gap between the TDR antennas and the surrounding media. The effect of this influent parameter is evaluated owing to our DPSM modeling, and some solutions are proposed to overcome the problem.

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Section: Dpsm Modeling and Application To Electrostaticmentioning

confidence: 99%

Theoretical and experimental study of a time-domain-reflectometry (TDR) probe used for water content measurement of clayrock through their electromagnetic properties

Boré

Placko

Taillade³

et al. 2013

SPIE Proceedings

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“…Dominique Placko and his associates researchers [11] since 2000, for solving electromagnetic and electrostatic 3D problems ( [12], [13], [14]). This method was then extended to solve ultrasonic problems, domain in which many applications were developed in collaboration with Pr.…”

Section: Introductionmentioning

confidence: 99%

Imaging and detection of cracks in metallic structures with eddy current sensors

2013

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In this paper we propose an original analytical modeling applied to electromagnetic (EM) systems, in the aim of performing an inversion scheme. The purpose consists in imaging cracks through eddy current sensors, the image being constituted by an estimation of the conductivity of the piece of metal under test, voxel by voxel. There are plenty of industrial applications in Non Destructive Evaluations for monitoring of cracks in structures: Aeronautics, Metallurgy, ships building and so on. For modeling, a relatively new developed technique, called 'Distributed Points Source Method' (DPSM) has been used. This original modeling was invented at Ecole Normale Superieure of Cachan in 2000, and since developed and patented in many kind of applications (Ultrasonics, Electrostatics…).

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Advanced Magnetodynamic and Electromagnetic Problems

Cited by 2 publications

References 0 publications

Theoretical and experimental study of a time-domain-reflectometry (TDR) probe used for water content measurement of clayrock through their electromagnetic properties

Theoretical and experimental study of a time-domain-reflectometry (TDR) probe used for water content measurement of clayrock through their electromagnetic properties

Imaging and detection of cracks in metallic structures with eddy current sensors

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