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Microcontroller-based moisture meter for ginger
Nur Biha Mohamed Nafis1, Zulkifly Abbas2, Jumiah Hassan3, Noradira Suhaime4, Lee, Kim Yee5, You, Kok Yeow6, Zaulia Othman7.
This paper describes the development of a simple method to determine the permittivity and moisture content (m.c.) of
ginger. The measurement system consists of a microwave sensor, directional coupler and a PIC microcontroller. The
microwave sensor is a square flanged open-ended coaxial (OEC) sensor made from SMA stub contact panel with outer
diameter (O.D) 4.10 mm. The microwave oven drying method was used to determine the actual m.c. of the ginger. All data
acquisition, processing and display were accomplished using a PIC 16F690 microcontroller programmed using Flowcode
software. The actual values of the permittivity of ginger were obtained by using the Agilent (now Keysight Technologies)
85070B dielectric probe along with a HP 8720B Vector Network Analyzer (VNA). The results showed good relationships
between m.c., permittivity (dielectric constant (εÍ´) and loss factor (εÌ‹)) and reflected voltage. The calibration equations
between reflected voltage and m.c. have been established for the sensor. The measurement system provides a simple, fast
and accurate technique to predict m.c., εÍ´ and εÌ‹ of ginger from reflected voltage measurements alone. The accuracy in
determination of m.c., εÍ´ and εÌ‹ in ginger was within 2.9%, 2.7%, and 3.6%, respectively.
Affiliation:
- Universiti Putra Malaysia, Malaysia
- Universiti Putra Malaysia, Malaysia
- Universiti Putra Malaysia, Malaysia
- Universiti Putra Malaysia, Malaysia
- Universiti Tunku Abdul Rahman, Malaysia
- Universiti Teknologi Malaysia, Malaysia
- Malaysian Agricultural Research and Development Institute (MARDI), Malaysia
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Indexed by |
MyJurnal (2021) |
H-Index
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6 |
Immediacy Index
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0.000 |
Rank |
0 |
Indexed by |
Web of Science (SCIE - Science Citation Index Expanded) |
Impact Factor
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JCR (1.009) |
Rank |
Q4 (Multidisciplinary Sciences) |
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JCI (0.15) |
Indexed by |
Scopus 2020 |
Impact Factor
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CiteScore (1.4) |
Rank |
Q2 (Multidisciplinary) |
Additional Information |
SJR (0.251) |
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