Nem ve Frekansa Bağlı Olarak Kayısı ve Erik Yapraklarının Dielektrik Özelliklerinin Dalga Kılavuzu İletim Hattı Yöntemiyle Belirlenmesi

Year 2020, , 195 - 204, 15.01.2020

Habib Doğan

https://doi.org/10.17714/gumusfenbil.604818

Abstract

Gelişen teknolojiyle birlikte
tarımsal ürünlerdeki uygulamalar gün geçtikçe yaygınlaşmaktadır. Bu
uygulamalarda temel belirleyici parametre, bitkisel malzemenin dielektrik
özelliğinin belirlenmesidir. Çünkü malzemeye nüfuz eden elektromanyetik (EM)
dalganın malzemeyle nasıl etkileşeceği dielektrik özelliklerine de bağlıdır.
Üretimde verim ve kalitenin artmasını sağlayan uzaktan algılama (UA) ile
kurutma ve ısıtma teknolojilerinin etkin çalışabilmesi, malzemenin dielektrik
karakteristiğiyle ilişkilidir. Bu çalışmada, Türkiye’de çok yaygın olarak
üretimi yapılan kayısı ve erik ağaçlarının yapraklarının dielektrik
parametreleri iletim hattı yöntemi kullanılarak ölçülmüştür. Ölçümler 3,30-4,90
GHz arasında (WR229 dalga kılavuzu için) yapılmış ve nem oranı ve frekansa
bağlı kayısı ve erik yapraklarının dielektrik karakteristikleri incelenmiştir.
Kayısı yapraklarının dielektrik ölçüm verilerini kullanarak frekans ve nem
oranına bağlı, eğri uydurma yöntemiyle yeni bir model önerilmiştir. Bu model,
kayısı türüyle aynı aileden olan erik yaprağının dielektrik ölçüm sonuçlarıyla
karşılaştırılarak önerilen modelin doğruluğu test edilmiştir. Modelin
performansını görmek için determinasyon katsayısı R² ve Hataların
Ortalama Kare Kökü (RMSE) değerleri sırasıyla 0.996 ve 0.653 olarak elde
edilmiştir.

Keywords

Dielektrik Ölçümü, Erik Yaprağı, Kayısı Yaprağı, Nem Oranı, NRW Algoritması

Determination of Dielectric Properties of Apricot and Plum Leaves by Waveguide Transmission Line Method depending on Moisture Content and Frequency

Abstract

With developing technology, applications in
agricultural products are becoming more common. The main dominant parameter in
these applications is the determination of the dielectric property of the plant
material. Because how the electromagnetic (EM) wave penetrating the material
interacts with the material depends on its dielectric properties. The ability
of remote sensing (RS) and drying and heating technologies to increase
efficiency and quality in production is related to the dielectric
characteristics of the material. In this study, the dielectric parameters of
leaves of apricot and plum trees made widely produced in Turkey are measured by
using the transmission line technique. Measurements are conducted between 3.30-4.90
GHz (for WR229 waveguide) and dielectric characteristics of apricot and plum
leaves depending on moisture content and frequency are investigated. A new
model is proposed by a curve fitting method based on frequency and moisture
content using dielectric measurement data of apricot leaves. This model is
compared with the dielectric measurement results of the plum leaves of the same
family as the apricot type and the accuracy of the proposed model is tested. To
make sure the performance of the model well enough, the coefficient of
determination R² and Mean Square Root of Error (RMSE) values are
obtained as 0.996 and 0.653, respectively.

Keywords

Dielectric Measurement, Plum Leaf, Apricot Leaf, Moisture Content, NRW algorithm

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