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Adel Zitouni, Larbi Beheim, Fabien Belloir, Danielle Nuzillard

Tag Detection by an Electromagnetic Sensor

Keywords: eddy current sensor, induction balance, modeling, DPSM

We describe an eddy current sensor based on the induction balance principle for the buried conductive tag recognition. The objective is to identify the various types of ground pipes without excavation. The principle is to associate to each pipe type a characteristic tag incorporating conductive elements. We present the changes made to the first sensor generation with the aim of view to improve its performances. We also describe the sensor modeling and its optimization by the replacement of the flat coils by turned coils. The other principal modifications are the integration of a numerical lock in detection and the use of an audio amplifier to improve the excitation signal. We show the results of methods used to recognize the two coding systems. We conclude by a summary of the improvements obtained and suggestions for future work.

tm – Technisches Messen, Oldenbourg Wissenschaftsverlag

Print ISSN: 0171-8096
Volume: 73, 06/2006
Pages: 364 - 370

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