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Microwave nondestructive testing of timber using a free-space technique / Hamidah Limat

The concern of this project is to develop a free-space measurement system at microwave frequenties. Micro wave Nondestructive Testing (MNDT) Techniques will be used for measuring moisture content, volume density, loss tangent (tan 5) and power absorption coëfficiënt (PAC) for different type of timbe...

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Main Author: Limat, Hamidah
Format: Thesis
Language:English
Published: 1997
Online Access:https://ir.uitm.edu.my/id/eprint/102170/1/102170.pdf
https://ir.uitm.edu.my/id/eprint/102170/
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spelling my.uitm.ir.1021702024-09-14T07:44:55Z https://ir.uitm.edu.my/id/eprint/102170/ Microwave nondestructive testing of timber using a free-space technique / Hamidah Limat Limat, Hamidah The concern of this project is to develop a free-space measurement system at microwave frequenties. Micro wave Nondestructive Testing (MNDT) Techniques will be used for measuring moisture content, volume density, loss tangent (tan 5) and power absorption coëfficiënt (PAC) for different type of timber ( Light Red Meranti, Yellow Meranti and Keruing). Reflection and transmission measurement s will be performed on a free-space micro wave measurement set up in frequency range of 8.0 to 12.5GHz. Free-space set-up consists of two spot-focusing hom lens (transmit and receive antennas), wave guide transistions, coaxial cabies and microwave Wiltron 372698 vector network analyzer . Errors due to difiraction effects at the edges of the specimen is minimized because of far field focussing abüity of antennas and multiple reflections bet ween antennas via the surface of specimen are eliminated by using free-space LRL (Line , Refiect and Line) calibration technique. Complex dielectric permittivity of timber will be measured to estimate moisture content of different types of timber from permittivity values . This MNDT technique is a simple , fast , nondestructive , contactless and accurate method for evaluating properties of timber. 1997 Thesis NonPeerReviewed text en https://ir.uitm.edu.my/id/eprint/102170/1/102170.pdf Microwave nondestructive testing of timber using a free-space technique / Hamidah Limat. (1997) Degree thesis, thesis, Universiti Teknologi MARA (UiTM).
institution Universiti Teknologi Mara
building Tun Abdul Razak Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Teknologi Mara
content_source UiTM Institutional Repository
url_provider http://ir.uitm.edu.my/
language English
description The concern of this project is to develop a free-space measurement system at microwave frequenties. Micro wave Nondestructive Testing (MNDT) Techniques will be used for measuring moisture content, volume density, loss tangent (tan 5) and power absorption coëfficiënt (PAC) for different type of timber ( Light Red Meranti, Yellow Meranti and Keruing). Reflection and transmission measurement s will be performed on a free-space micro wave measurement set up in frequency range of 8.0 to 12.5GHz. Free-space set-up consists of two spot-focusing hom lens (transmit and receive antennas), wave guide transistions, coaxial cabies and microwave Wiltron 372698 vector network analyzer . Errors due to difiraction effects at the edges of the specimen is minimized because of far field focussing abüity of antennas and multiple reflections bet ween antennas via the surface of specimen are eliminated by using free-space LRL (Line , Refiect and Line) calibration technique. Complex dielectric permittivity of timber will be measured to estimate moisture content of different types of timber from permittivity values . This MNDT technique is a simple , fast , nondestructive , contactless and accurate method for evaluating properties of timber.
format Thesis
author Limat, Hamidah
spellingShingle Limat, Hamidah
Microwave nondestructive testing of timber using a free-space technique / Hamidah Limat
author_facet Limat, Hamidah
author_sort Limat, Hamidah
title Microwave nondestructive testing of timber using a free-space technique / Hamidah Limat
title_short Microwave nondestructive testing of timber using a free-space technique / Hamidah Limat
title_full Microwave nondestructive testing of timber using a free-space technique / Hamidah Limat
title_fullStr Microwave nondestructive testing of timber using a free-space technique / Hamidah Limat
title_full_unstemmed Microwave nondestructive testing of timber using a free-space technique / Hamidah Limat
title_sort microwave nondestructive testing of timber using a free-space technique / hamidah limat
publishDate 1997
url https://ir.uitm.edu.my/id/eprint/102170/1/102170.pdf
https://ir.uitm.edu.my/id/eprint/102170/
_version_ 1811598270531633152
score 13.211869

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