Etude d'un capteur électromagnétique plat de proximité

Billat, A.; Leclerc, A.; Emond, J.C.; Villermain-Lecolier, G.

doi:10.1051/rphysap:01986002107044300

Cited by 17 publications

(5 citation statements)

References 3 publications

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“…=> T C.pS = MTT RHOT .MTS Vs (4) We describe the construction of a triplet, we check that the three point sources are in the same plane; this last is placed at r distance of collocation point: Where R is the distance between point sources i and j: (5) (6) LM TSz _ After we redo the same operations to obtain MTT, the coupling matrix between target point sources Ti them self. Now, we know all parameter values of equation (4), and we can compute flux PT on target.…”

Section: Dpsm Theorymentioning

confidence: 99%

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Modeling of Intelligent Electromagnetic Sensor for Buried Tags

Zitouni¹,

Beheim²,

Belloir³

2006

IECON 2006 - 32nd Annual Conference on IEEE Industrial Electronics

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in this paper we describe an eddy current sensor based on the induction balance principle for the recognition of buried conductive tag. The objective of this system is to identify without excavation the various types of ground pipes. The principle is to associate to each pipe type a characteristic tag integrating conductive elements. We present a DPSM theory used for sensor modeling. We present also the first generation model of our sensor, and the optimization of different parts of this last one. Specially, the replacement of flat coils by "turned" ones, their dimensions and positions. After modeling, we describe the sensor second generation carried out and obtained real signals. We show the results of methods used to recognize the two coding systems. We conclude by the improvements obtained by all these changes and the future work suggested.

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Section: Dpsm Theorymentioning

confidence: 99%

“…A study carried out by [5] showed that the coil in spiral can be assimilated as uniform distribution of current in one case. In this case, the distance between the coil plan and the field measurement point is at least higher than 10 times to the width separating two successive turns of this coil.…”

Section: Sensor Modelingmentioning

confidence: 99%

Modeling of Intelligent Electromagnetic Sensor for Buried Tags

Zitouni¹,

Beheim²,

Belloir³

2006

IECON 2006 - 32nd Annual Conference on IEEE Industrial Electronics

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“…The Laboratoire d'Automatique et de Microélectronique designed a new eddy-current sensor [2]. The theoretical possibilities of this kind of sensor have been studied in [3] and we will not discuss here its effect on the fields generated. It consists of a flat coil carved onto a printed circuit with an epoxy-resin support.…”

Section: The Sensor Specificationmentioning

confidence: 99%

A smart flat-coil eddy-current sensor for metal-tag recognition

Belloir

Huez

Billat

2000

Meas. Sci. Technol.

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This paper describes a smart eddy-current sensor for locating and identifying metal tags used to recognize buried pipes. We first describe the tags used and the technology of our locator, which is based on the induction-balance principle. We also describe an essential measurement-distance system controlling the sampling of data. An originality of the detector is the use of two flat coils carved onto an epoxy-resin support to generate the best possible electromagnetic field. The tags are made up of metal pieces of varying sizes separated by spaces of varying sizes. Intelligent pattern-recognition methods and their combination by the theory of evidence, which provide good and reliable recognition, are briefly presented. Finally, the system's performance for various depths of burial is analysed and ways to improve these results are presented.

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“…De nombreux dispositifs de capteurs de proximité exploitant les courants de Foucault ont été décrits dans la littérature [1][2][3][4]. Dans des articles précédents [5] et [6] nous avons présenté les caractéristiques physiques d'un capteur magnétique de proximité constitué d'une spirale gravée sur un support époxy simple face. Nous avions alors montré que la réponse en fréquence d'un tel capteur était caractéristique d'un modèle inductance-résistance en série.…”

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“…De façon à améliorer les performances de ce type de capteurs, nous avons réalisé des échantillons gravés en double face, les deux spirales, de caractéristiques géométriques identiques, étant alors enroulées en sens contraire et reliées électriquement par leur centre ; la technique de réalisation de ces capteurs procède des méthodes décrites dans [6]. Il est clair que, par rapport aux capteurs simple face de même géométrie, ces capteurs double face verront leur inductance quadruplée (en admettant un facteur de couplage égal à 1) et leur résistance doublée.…”

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