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A small and slim coaxial probe for single rice grain moisture sensing


You, Kok Yeow and Mun, Hou Kit and You, Li Ling and Salleh, Jamaliah and Abbas, Zulkifly (2013) A small and slim coaxial probe for single rice grain moisture sensing. Sensors, 13 (3). pp. 3652-3663. ISSN 1424-8220


A moisture detection of single rice grains using a slim and small open-ended coaxial probe is presented. The coaxial probe is suitable for the nondestructive measurement of moisture values in the rice grains ranging from from 9.5% to 26%. Empirical polynomial models are developed to predict the gravimetric moisture content of rice based on measured reflection coefficients using a vector network analyzer. The relationship between the reflection coefficient and relative permittivity were also created using a regression method and expressed in a polynomial model, whose model coefficients were obtained by fitting the data from Finite Element-based simulation. Besides, the designed single rice grain sample holder and experimental set-up were shown. The measurement of single rice grains in this study is more precise compared to the measurement in conventional bulk rice grains, as the random air gap present in the bulk rice grains is excluded.

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Official URL or Download Paper: http://www.mdpi.com/1424-8220/13/3

Additional Metadata

Item Type: Article
Divisions: Faculty of Science
DOI Number: https://doi.org/10.3390/s130303652
Publisher: MDPI
Keywords: Gravimetric moisture content; Measured reflection coefficient; Microwave measurement techniques; Relative permittivity; Single rice grain; Small open-ended coaxial probe; Transmission line
Depositing User: Umikalthom Abdullah
Date Deposited: 24 Oct 2014 02:19
Last Modified: 26 Oct 2015 02:54
Altmetrics: http://www.altmetric.com/details.php?domain=psasir.upm.edu.my&doi=10.3390/s130303652
URI: http://psasir.upm.edu.my/id/eprint/30380
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