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Dual frequency microstrip antenna sensor for water content measurements independent of temperature variation

Temperature variation causes errors in all indirect moisture measurement methods. To increase the accuracy of moisture content determination and to reduce the influence of temperature, a two-parameter measurement is used. The method uses the magnitude of reflected waves at two microwave frequencies...

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Main Authors: Ghretli, Mohamed Mustafa, Khalid, Kaida, Grozescu, Ionel Valeriu, Sahri, Mohd Hamami, Abbas, Zulkifly
Format: Article
Language:English
Published: Institute of Physics 2007
Online Access:http://psasir.upm.edu.my/id/eprint/7670/
http://dx.doi.org/10.1088/0957-0233/18/4/013
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spelling my.upm.eprints.76702010-08-20T04:22:06Z http://psasir.upm.edu.my/id/eprint/7670/ Dual frequency microstrip antenna sensor for water content measurements independent of temperature variation Ghretli, Mohamed Mustafa Khalid, Kaida Grozescu, Ionel Valeriu Sahri, Mohd Hamami Abbas, Zulkifly Temperature variation causes errors in all indirect moisture measurement methods. To increase the accuracy of moisture content determination and to reduce the influence of temperature, a two-parameter measurement is used. The method uses the magnitude of reflected waves at two microwave frequencies in the X-band region. A dual frequency sensor system is developed to measure moisture content of dielectric-lossy liquids. The experiment is based on measurements of far-field reflection magnitudes at two different frequencies 8.48 GHz and 10.69 GHz using circular microstrip antennas. A calibration equation is sought that instantly gives temperature-independent moisture content of the samples under consideration. The sensor is integrated with a data acquisition card to record the detected reflection signals. The data analysis and error-correction technique are implemented using custom designed software. The system is tested using diluted rubber latex with moisture content ranging from 39.8% to 91.2% wet basis. The moisture content was predicted with a standard error less than 1.3% for the temperature range of 25 °C to 63 °C compared to the standard oven-drying technique. Institute of Physics 2007 Article PeerReviewed Ghretli, Mohamed Mustafa and Khalid, Kaida and Grozescu, Ionel Valeriu and Sahri, Mohd Hamami and Abbas, Zulkifly (2007) Dual frequency microstrip antenna sensor for water content measurements independent of temperature variation. Measurement Science and Technology, 18 (4). pp. 1054-1060. ISSN 0957-0233 http://dx.doi.org/10.1088/0957-0233/18/4/013 10.1088/0957-0233/18/4/013 English
institution Universiti Putra Malaysia
building UPM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Putra Malaysia
content_source UPM Institutional Repository
url_provider http://psasir.upm.edu.my/
language English
description Temperature variation causes errors in all indirect moisture measurement methods. To increase the accuracy of moisture content determination and to reduce the influence of temperature, a two-parameter measurement is used. The method uses the magnitude of reflected waves at two microwave frequencies in the X-band region. A dual frequency sensor system is developed to measure moisture content of dielectric-lossy liquids. The experiment is based on measurements of far-field reflection magnitudes at two different frequencies 8.48 GHz and 10.69 GHz using circular microstrip antennas. A calibration equation is sought that instantly gives temperature-independent moisture content of the samples under consideration. The sensor is integrated with a data acquisition card to record the detected reflection signals. The data analysis and error-correction technique are implemented using custom designed software. The system is tested using diluted rubber latex with moisture content ranging from 39.8% to 91.2% wet basis. The moisture content was predicted with a standard error less than 1.3% for the temperature range of 25 °C to 63 °C compared to the standard oven-drying technique.
format Article
author Ghretli, Mohamed Mustafa
Khalid, Kaida
Grozescu, Ionel Valeriu
Sahri, Mohd Hamami
Abbas, Zulkifly
spellingShingle Ghretli, Mohamed Mustafa
Khalid, Kaida
Grozescu, Ionel Valeriu
Sahri, Mohd Hamami
Abbas, Zulkifly
Dual frequency microstrip antenna sensor for water content measurements independent of temperature variation
author_facet Ghretli, Mohamed Mustafa
Khalid, Kaida
Grozescu, Ionel Valeriu
Sahri, Mohd Hamami
Abbas, Zulkifly
author_sort Ghretli, Mohamed Mustafa
title Dual frequency microstrip antenna sensor for water content measurements independent of temperature variation
title_short Dual frequency microstrip antenna sensor for water content measurements independent of temperature variation
title_full Dual frequency microstrip antenna sensor for water content measurements independent of temperature variation
title_fullStr Dual frequency microstrip antenna sensor for water content measurements independent of temperature variation
title_full_unstemmed Dual frequency microstrip antenna sensor for water content measurements independent of temperature variation
title_sort dual frequency microstrip antenna sensor for water content measurements independent of temperature variation
publisher Institute of Physics
publishDate 2007
url http://psasir.upm.edu.my/id/eprint/7670/
http://dx.doi.org/10.1088/0957-0233/18/4/013
_version_ 1643823792468787200
score 13.211869

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