Design of an Underwater Object Detection and Location System using Wide-Beam SONAR

Description

Thesis (MScEng)--Stellenbosch University, 2014. / ENGLISH ABSTRACT: This thesis describes the second project relating to the development of a SONAR (SOund Navigation
And Ranging) object detection and collision avoidance system for use on an AUV (Autonomous
Underwater Vehicle) at Stellenbosch University. The main goal is to develop and test techniques
that make use of the existing SONAR laboratory platform and wide-beam SONAR transducers to
detect and locate objects and their limits/bounds under water in the horizontal plane. The results
of the work done show that it is possible to use wide-beam transducers to locate the centroid
and edges of a flat target with an error that is significantly smaller than the beam-width. The
techniques developed will enable the development of a cost-effective SONAR system that can be
implemented on an AUV. / AFRIKAANSE OPSOMMING: Hierdie tesis beskryf the tweede projek rakende die ontwikkeling van ’n SONAR voorwerp opsporings
en botsingvermydingstelsel vir gebruik op ’n OOV (Outonome Onderwater Voertuig) aan
die Universiteit van Stellenbosch. Die hoofdoel is om tegnieke te ontwikkel en te toets wat gebruik
maak van die bestaande SONAR laboratorium opstelling en wye-straal SONAR opnemers
om die posisie van voorwerpe onder water te bepaal, sowel as die posisie van die voorwerp se
rande in die horisontale vlak. Die resultate van die werk wat gedoen is wys dat dit moontlik is om
wye-straal opnemers te gebruik om die posisie van die sentroïde en rande van ’n plat voorwerp
te vind met ’n fout wat aansienlik kleiner is as die straal-wydte. Die tegnieke wat ontwikkel is sal
ons in staat stel om ’n koste-effektiewe SONAR stelsel te ontwikkel wat op ’n OOV geïmplenteer
kan word.

Links & Downloads

1. http://hdl.handle.net/10019.1/86236

Tags

Wide-beam Sonar

Object location

Sub-beam width accuracy

Sonar

Detectors

Transducers

UCTD

Additional Fields

Identifer	oai:union.ndltd.org:netd.ac.za/oai:union.ndltd.org:sun/oai:scholar.sun.ac.za:10019.1/86236
Date	04 1900
Creators	Du Pisani, Renaldo Murray
Contributors	Treurnicht, J., Stellenbosch University. Faculty of Engineering. Dept. of Electrical and Electronic Engineering
Publisher	Stellenbosch : Stellenbosch University
Source Sets	South African National ETD Portal
Language	en_ZA
Detected Language	Unknown
Type	Thesis
Format	xvi, 108 p. : ill.
Rights	Stellenbosch University