3D-Bottom Tracking based on Acoustic Diffraction for Autonomous Underwater Vehicles - LIRMM - Laboratoire d’Informatique, de Robotique et de Microélectronique de Montpellier Access content directly
Conference Papers Year : 2005

3D-Bottom Tracking based on Acoustic Diffraction for Autonomous Underwater Vehicles

Abstract

Navigation of autonomous underwater vehicles (A.U.V.) in very shallow waters implies acoustic detection. In single beam sonar systems, sound emitted by ultrasonic transducers is diffracted and secondary lobes appear. Considering the sea bottom's backscattering properties, secondary lobes can be used to work out the three-dimensional equation of the plane that represents the seabed. In this paper, we will first consider characteristics of electro-acoustic transducers with rectangular aperture and study the resulting acoustic diffraction. Then, we explain how to choose the best dimensions of the transducer and the related best orientation. Moreover, we introduce a methodaiming to extract the seabed 3D equation from the received acoustic echo. Thus single beam sonar systems can be used for bottom tracking purposes. We present the results of our simulations and our experimental device.
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Dates and versions

lirmm-00106462 , version 1 (16-10-2006)

Identifiers

  • HAL Id : lirmm-00106462 , version 1

Cite

Vincent Creuze, Bruno Jouvencel, Philippe Baccou. 3D-Bottom Tracking based on Acoustic Diffraction for Autonomous Underwater Vehicles. ICAR 2005 - 12th International Conference on Advanced Robotics, Jul 2005, Seattle, United States. ⟨lirmm-00106462⟩
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