Image reconstruction technique via ultrasonic tomography system for metal pipe

Detection of concentration of the gas/liquid mixture inside the pipe with Ultrasonic Tomography (UT) has been investigated seriously with various researchers in the recent decade. To date, most of the researches of ut focus on Acrylic or PVC as pipe material. This research investigates the usage of...

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Main Author:	Bargoshadi, Javad Abbaszadeh
Format:	Thesis
Language:	English
Published:	2014
Subjects:	TK Electrical engineering Electronics Nuclear engineering
Online Access:	http://eprints.utm.my/id/eprint/78089/1/JavadAbbaszadehBargoshadiPFKE2014.pdf
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spelling	my-utm-ep.780892018-07-23T06:10:24Z Image reconstruction technique via ultrasonic tomography system for metal pipe 2014-08 Bargoshadi, Javad Abbaszadeh TK Electrical engineering. Electronics Nuclear engineering Detection of concentration of the gas/liquid mixture inside the pipe with Ultrasonic Tomography (UT) has been investigated seriously with various researchers in the recent decade. To date, most of the researches of ut focus on Acrylic or PVC as pipe material. This research investigates the usage of metal pipe for ut application. The attenuation problem of metal pipe is due to high acoustic impedance mismatch between liquid and metal pipe. Based on the problems of metal pipe for application in the UT system, various alternatives are presented in this research. Modelling of the UT using COMSOL software is studied to visualize the real UT system. Various frequencies are tested to determine the optimum frequency of the UT system. The hardware of UT system is developed after selection of the suitable transceiver. The structures of the transmitter and receiver circuits are developed in order to improve the Signal to Noise Ratio (SNR) and functionality of circuits. The sampled signals are preceded to the computer via Data Acquisition (DAQ) system. Various algorithms are investigated to produce the best image reconstruction of the UT system. As the basic and convenient algorithm, Linear Back Projection (LBP) is used for reconstructing the primary image. Median Filter Back Projection (MFBP) and Disk Filter Back Projection (DFBP) are applied to improve the image quality of LBP algorithm. Additionally, the Circular Thresholding Segmentation (CTS) algorithm is applied to produce the segmented thresholding images. Based on the simulation results, 40 kHz is determined as the optimum frequency of UT system. The designed UT system for the metal pipe is experimentally tested and cross-sectional images are extracted from metal pipe. Additionally, this thesis presents the static and dynamic results of UT system from metal pipe. Based on the comparison between the performances of applied algorithms, the CTS algorithm has the best results due the minimum errors between original images and reconstructed images. The obtained results corroborate the. 2014-08 Thesis http://eprints.utm.my/id/eprint/78089/ http://eprints.utm.my/id/eprint/78089/1/JavadAbbaszadehBargoshadiPFKE2014.pdf application/pdf en public http://dms.library.utm.my:8080/vital/access/manager/Repository/vital:98647 phd doctoral Universiti Teknologi Malaysia, Faculty of Electrical Engineering Faculty of Electrical Engineering
institution	Universiti Teknologi Malaysia
collection	UTM Institutional Repository
language	English
topic	TK Electrical engineering Electronics Nuclear engineering
spellingShingle	TK Electrical engineering Electronics Nuclear engineering Bargoshadi, Javad Abbaszadeh Image reconstruction technique via ultrasonic tomography system for metal pipe
description	Detection of concentration of the gas/liquid mixture inside the pipe with Ultrasonic Tomography (UT) has been investigated seriously with various researchers in the recent decade. To date, most of the researches of ut focus on Acrylic or PVC as pipe material. This research investigates the usage of metal pipe for ut application. The attenuation problem of metal pipe is due to high acoustic impedance mismatch between liquid and metal pipe. Based on the problems of metal pipe for application in the UT system, various alternatives are presented in this research. Modelling of the UT using COMSOL software is studied to visualize the real UT system. Various frequencies are tested to determine the optimum frequency of the UT system. The hardware of UT system is developed after selection of the suitable transceiver. The structures of the transmitter and receiver circuits are developed in order to improve the Signal to Noise Ratio (SNR) and functionality of circuits. The sampled signals are preceded to the computer via Data Acquisition (DAQ) system. Various algorithms are investigated to produce the best image reconstruction of the UT system. As the basic and convenient algorithm, Linear Back Projection (LBP) is used for reconstructing the primary image. Median Filter Back Projection (MFBP) and Disk Filter Back Projection (DFBP) are applied to improve the image quality of LBP algorithm. Additionally, the Circular Thresholding Segmentation (CTS) algorithm is applied to produce the segmented thresholding images. Based on the simulation results, 40 kHz is determined as the optimum frequency of UT system. The designed UT system for the metal pipe is experimentally tested and cross-sectional images are extracted from metal pipe. Additionally, this thesis presents the static and dynamic results of UT system from metal pipe. Based on the comparison between the performances of applied algorithms, the CTS algorithm has the best results due the minimum errors between original images and reconstructed images. The obtained results corroborate the.
format	Thesis
qualification_name	Doctor of Philosophy (PhD.)
qualification_level	Doctorate
author	Bargoshadi, Javad Abbaszadeh
author_facet	Bargoshadi, Javad Abbaszadeh
author_sort	Bargoshadi, Javad Abbaszadeh
title	Image reconstruction technique via ultrasonic tomography system for metal pipe
title_short	Image reconstruction technique via ultrasonic tomography system for metal pipe
title_full	Image reconstruction technique via ultrasonic tomography system for metal pipe
title_fullStr	Image reconstruction technique via ultrasonic tomography system for metal pipe
title_full_unstemmed	Image reconstruction technique via ultrasonic tomography system for metal pipe
title_sort	image reconstruction technique via ultrasonic tomography system for metal pipe
granting_institution	Universiti Teknologi Malaysia, Faculty of Electrical Engineering
granting_department	Faculty of Electrical Engineering
publishDate	2014
url	http://eprints.utm.my/id/eprint/78089/1/JavadAbbaszadehBargoshadiPFKE2014.pdf
_version_	1747817904302194688

Image reconstruction technique via ultrasonic tomography system for metal pipe

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