Ghretli, Mohamed Mustafa and Grozescu, Ionel Valeriu and Sahri, Mohd Hamami and Abbas, Zulkifly and Khalid, Kaida (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
Full text not available from this repository.
Official URL: http://dx.doi.org/10.1088/0957-0233/18/4/013
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
|Keyword:||microwaves, water content, rubber latex, temperature independent|
|Faculty or Institute:||Faculty of Science|
|Publisher:||Institute of Physics|
|Deposited By:||Najwani Amir Sariffudin|
|Deposited On:||04 Aug 2010 09:15|
|Last Modified:||04 Aug 2010 09:19|
Repository Staff Only: item control page
Document Download Statistics
This item has been downloaded for since 04 Aug 2010 09:15.