DocumentCode :
2596955
Title :
Using sound diffraction to determine the seabed slope
Author :
Creuze, V. ; Jouvencel, B. ; Baccou, P.
Author_Institution :
LIRMM/CNRS, Univ. Montpellier II, France
fYear :
2005
fDate :
2-6 Aug. 2005
Firstpage :
277
Lastpage :
282
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 enhance knowledge of seabed features such as slope, and marked variations. In this paper, we firstly consider characteristics of electro-acoustic transducers and study the resulting acoustic diffraction. Then, we introduce a new method aiming to extract seabed features 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 experimental validation.
Keywords :
diffraction; navigation; sonar detection; ultrasonic transducers; underwater vehicles; acoustic detection; acoustic diffraction; acoustic echo; autonomous underwater vehicle; backscattering; beam sonar system; bottom tracking; electro-acoustic transducer; seabed slope; sound diffraction; ultrasonic transducer; Acoustic beams; Acoustic diffraction; Acoustic emission; Acoustic signal detection; Sonar navigation; Ultrasonic transducers; Underwater acoustics; Underwater tracking; Underwater vehicles; Vehicle detection; Acoustic detection; Autonomous Underwater Vehicles; acoustic diffraction; bottom tracking;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Intelligent Robots and Systems, 2005. (IROS 2005). 2005 IEEE/RSJ International Conference on
Print_ISBN :
0-7803-8912-3
Type :
conf
DOI :
10.1109/IROS.2005.1545228
Filename :
1545228
Link To Document :
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