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Détection d'objets enfouis sur le fond marin par ondes sismo-acoustiques de Scholte

Abstract : This work deals with buried object detection at the seafloor using seismo-acoustic waves of Scholte kind.
We defined a system composed of a multicomponent array of sensors and an impulsive source, both placed at the interface.
The array processing is twofold. First, the incident wave on the array is used to estimate Scholte waves' propagation features. Then a detection image is computed with an array processing adapted to Scholte waves.
It takes into account dispersion and polarisation.
The processing requires an accurate knowledge of seismo-acoustic noise.
We provide models for it.
The performance has a great sensitivity to the noise's structure. The results also highlight the interests of multicomponent processing.
The method was successfully validated with synthetic elastic waves and in a real case.
It demands an experimental validation in a controled environment and at sea.
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Submitted on : Friday, February 8, 2008 - 12:32:56 PM
Last modification on : Friday, November 6, 2020 - 4:04:00 AM
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  • HAL Id : tel-00248886, version 1

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Cyril Kotenkoff. Détection d'objets enfouis sur le fond marin par ondes sismo-acoustiques de Scholte. Traitement du signal et de l'image [eess.SP]. Institut National Polytechnique de Grenoble - INPG, 2006. Français. ⟨tel-00248886⟩

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