Development of a Microstrip Ring Resonator for Measurement of Moisture in Oil Palm Fruits and Seeds

The conventional oven method for the determination of moisture content in oil palm fruits and seeds is too laborious and time-consuming. An alternative method is to use microwave method, which is widely known to be accurate and rapid. However not all microwave techniques are suitable for single frui...

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Main Author:	Ali Abrass, Hameda
Format:	Thesis
Language:	English English
Published:	2007
Subjects:	Moisture - Measurement. Oil palm.
Online Access:	http://psasir.upm.edu.my/id/eprint/4989/1/FS_2007_11.pdf
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spelling	my-upm-ir.49892013-05-27T07:19:36Z Development of a Microstrip Ring Resonator for Measurement of Moisture in Oil Palm Fruits and Seeds 2007 Ali Abrass, Hameda The conventional oven method for the determination of moisture content in oil palm fruits and seeds is too laborious and time-consuming. An alternative method is to use microwave method, which is widely known to be accurate and rapid. However not all microwave techniques are suitable for single fruit or seed measurements due to small sample size. This thesis describes the development of a microstrip ring resonator to determine moisture content in oil palm fruits and seeds. The measurement system consists of the mirostrip resonator as sensor and PC-controlled vector network analyzer (VNA). This measurement software has been developed to control and acquire data from the VNA using Agilent Visual Engineering Environment Software. The microstrip ring resonator operates between 2.2 GHz and 3 GHz. The microstrip ring resonator operates at a low microwave frequency to allow wider electromagnetic field interaction between the resonator and the fruit sample. A theoretical analysis has been carried out to establish the optimum operating frequency based on the relationship between the admittance and frequency of the microstrip ring. The propagation of electromagnetic wave is assumed to be transverse electromagnetic (TEM) mode. The actual moisture content was found by standard oven drying method. A calibration equation relating the measured and predicted values for both magnitudes (dB) of S11 and S21 was established. The equation was found to be accurate within 1.55% and 3.35% for the magnitude (dB) of S11 and S21, respectively in the fruit samples. Similarly, the equation was found to be accurate within 2.89% and 3.38% for magnitude (dB) of S11 and S21, respectively, in the seed samples. A calibration equation which relates the measured and predicted moisture content was also been established. The equation was found to be accurate within ± 2.7% for S11 and ± 2.9% for S21 for the fruit samples, whilst within ± 3% for S11 and ± 3.2% for S21 for the seed samples. The accuracy of this technique in determining the moisture content was tested on more than 160 different fruit and seed samples. Moisture - Measurement. Oil palm. 2007 Thesis http://psasir.upm.edu.my/id/eprint/4989/ http://psasir.upm.edu.my/id/eprint/4989/1/FS_2007_11.pdf application/pdf en public masters Universiti Putra Malaysia Moisture - Measurement. Oil palm. Science English
institution	Universiti Putra Malaysia
collection	PSAS Institutional Repository
language	English English
topic	Moisture - Measurement. Oil palm.
spellingShingle	Moisture - Measurement. Oil palm. Ali Abrass, Hameda Development of a Microstrip Ring Resonator for Measurement of Moisture in Oil Palm Fruits and Seeds
description	The conventional oven method for the determination of moisture content in oil palm fruits and seeds is too laborious and time-consuming. An alternative method is to use microwave method, which is widely known to be accurate and rapid. However not all microwave techniques are suitable for single fruit or seed measurements due to small sample size. This thesis describes the development of a microstrip ring resonator to determine moisture content in oil palm fruits and seeds. The measurement system consists of the mirostrip resonator as sensor and PC-controlled vector network analyzer (VNA). This measurement software has been developed to control and acquire data from the VNA using Agilent Visual Engineering Environment Software. The microstrip ring resonator operates between 2.2 GHz and 3 GHz. The microstrip ring resonator operates at a low microwave frequency to allow wider electromagnetic field interaction between the resonator and the fruit sample. A theoretical analysis has been carried out to establish the optimum operating frequency based on the relationship between the admittance and frequency of the microstrip ring. The propagation of electromagnetic wave is assumed to be transverse electromagnetic (TEM) mode. The actual moisture content was found by standard oven drying method. A calibration equation relating the measured and predicted values for both magnitudes (dB) of S11 and S21 was established. The equation was found to be accurate within 1.55% and 3.35% for the magnitude (dB) of S11 and S21, respectively in the fruit samples. Similarly, the equation was found to be accurate within 2.89% and 3.38% for magnitude (dB) of S11 and S21, respectively, in the seed samples. A calibration equation which relates the measured and predicted moisture content was also been established. The equation was found to be accurate within ± 2.7% for S11 and ± 2.9% for S21 for the fruit samples, whilst within ± 3% for S11 and ± 3.2% for S21 for the seed samples. The accuracy of this technique in determining the moisture content was tested on more than 160 different fruit and seed samples.
format	Thesis
qualification_level	Master's degree
author	Ali Abrass, Hameda
author_facet	Ali Abrass, Hameda
author_sort	Ali Abrass, Hameda
title	Development of a Microstrip Ring Resonator for Measurement of Moisture in Oil Palm Fruits and Seeds
title_short	Development of a Microstrip Ring Resonator for Measurement of Moisture in Oil Palm Fruits and Seeds
title_full	Development of a Microstrip Ring Resonator for Measurement of Moisture in Oil Palm Fruits and Seeds
title_fullStr	Development of a Microstrip Ring Resonator for Measurement of Moisture in Oil Palm Fruits and Seeds
title_full_unstemmed	Development of a Microstrip Ring Resonator for Measurement of Moisture in Oil Palm Fruits and Seeds
title_sort	development of a microstrip ring resonator for measurement of moisture in oil palm fruits and seeds
granting_institution	Universiti Putra Malaysia
granting_department	Science
publishDate	2007
url	http://psasir.upm.edu.my/id/eprint/4989/1/FS_2007_11.pdf
_version_	1747810325346910208

Development of a Microstrip Ring Resonator for Measurement of Moisture in Oil Palm Fruits and Seeds

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