BURIED OBJECT DETECTION WITH PARAMETRIC SONAR

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" BURIED OBJECT DETECTION WITH PARAMETRIC SONAR "

Document Type	:	Latin Dissertation
Language of Document	:	English
Record Number	:	151439
Doc. No	:	ET23231
Main Entry	:	MARIA T. KALCIC
Title Proper	:	BURIED OBJECT DETECTION WITH PARAMETRIC SONAR
Note	:	This document is digital این مدرک بصورت الکترونیکی می باشد
Abstract	:	Detection of buried objects with parametric sonar is studied using time-frequency methods. The sonar equation is used as a framework to assess the sonarsystem characteristics, the sediment response, and the buried object response.Field tests were conducted to measure the source levels of difference frequenciesin the nearfield and spectral components at different ranges. The results of thesetests were compared with the predicted values from the MoEett-Mellen modelin the nearfield. The analysis reveals the nonstationary and nonlinear behaviorof the sonar system and environment and shows that a linear systems approachis not realistic. Analysis of sediment variability and attenuation quantifies thenonstationarity of the media and motivates the use of gain correction techniquespresented in this dissertation. The response of buried objects was found toeshibit resonances and time-frequency dependence. Acoustic resonance theoryis used to explain the target response and is shown to be effective....-....,....-...,..tested for theQ1 PC1 bus cardBoth these projects mere sofixare des elopment efforts tonards contributing to dlfferentaspects of Roboucs and lZ1echatronics projects m the Controls and Roboucs Group..
Subject	:	Electericl tess
	:	برق
electronic file name	:	TL46467.pdf
Title and statement of responsibility and	:	BURIED OBJECT DETECTION WITH PARAMETRIC SONAR [Thesis]