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Application of microwave moisture sensor for determination of oil palm fruits ripeness


Citation

Kok, Yeow You and Abbas, Zulkifly and Khalid, Kaida (2010) Application of microwave moisture sensor for determination of oil palm fruits ripeness. Measurement Science Review, 10 (1). pp. 7-14. ISSN 1335-8871

Abstract

This paper describes the development of a low cost coaxial moisture sensor for the determination of moisture content (30 % to 80 % wet-weight basis) of the oil palm fruits of various degree of fruit ripeness. The sensor operating between 1 GHz and 5 GHz was fabricated from an inexpensive 4.1 mm outer diameter SMA coaxial stub contact panel whic h is suitable for single fruit measurement. The measurement system consists of the sensor and a PC-controlled vector network analyzer (VNA). The actual moisture content was determined by standard oven drying method and compared with predicted value of fruit moisture content obtained using the studied sensor. The sensor was used to monitor fruit ripeness based on the measurement of the phase or magnitude of reflection coefficient and the dielectric measurement software was developed to control and acquire data from the VNA using Agilent VEE. This software was used to calculate the complex relative permittivity from the measured reflection coefficient between 1GHz and 5 GHz.


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Additional Metadata

Item Type: Article
Divisions: Faculty of Science
DOI Number: https://doi.org/10.2478/v10048-010-0002-x
Publisher: De Gruyter Open
Keywords: Vector network analyzer; Moisture content; Reflection coefficient; Oil palm fruits; Microwave sensors; Dielectric constant
Depositing User: Nurul Ainie Mokhtar
Date Deposited: 08 Jun 2015 01:22
Last Modified: 22 Sep 2015 06:53
Altmetrics: http://www.altmetric.com/details.php?domain=psasir.upm.edu.my&doi=10.2478/v10048-010-0002-x
URI: http://psasir.upm.edu.my/id/eprint/13236
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