بررسی اثر رطوبت و بسامد بر برخی خواص دی‌الکتریکی دو رقم شلتوک

نوع مقاله: مقاله پژوهشی

نویسندگان

1 دانشجوی کارشناسی ارشد، دانشکده مهندسی زراعی، دانشگاه علوم کشاورزی و منابع طبیعی ساری

2 عضو هیئت علمی/گروه مهندسی مکانیک بیوسیستم، دانشکده مهندسی زراعی، دانشگاه علوم کشاورزی و منابع طبیعی ساری

چکیده

خواص دی الکتریکی محصولات کشاورزی یکی از مهم ترین خصوصیات فیزیکی محصولات کشاورزی و غذایی به شمار می­رود و استفاده از این خواص به عنوان یک فناوری جدید برای استفاده در کشاورزی و صنایع وابسته به شدت در حال توسعه می­باشد. لذا در این تحقیق، تغییرات خواص دی­الکتریک شلتوک ارقام قائم و پژوهش در 4 سطح رطوبت (13، 16، 19 و 22 درصد بر پایه خشک) و 4 بسامد (100، 300، 500 و 700 کیلوهرتز) در 3 تکرار به صورت فاکتوریل و در قالب طرح کاملاً تصادفی بررسی شد. نتایج نشان دادند که بین ارقام مورد بررسی از نظر خواص دی­الکتریکی تفاوت معنی داری وجود ندارد، اما رطوبت بر کلیه خواص مورد بررسی اثری معنی­دار و افزایشی دارد، همچنین افزایش بسامد ولتاژ ورودی هرچند منجر به افزایش هدایت الکتریکی شلتوک می­گردد اما اثر معکوسی بر ثابت دی­الکتریک نسبی و اتلافی آن دارد. در بین اثرات متقابل این عوامل نیز تنها اثر متقابل رطوبت و بسامد تاثیر معنی­داری بر ثابت دی­الکتریک نسبی و اتلافی شلتوک دارند. همچنین مدل­های MLR  توانستند رابطه بین رطوبت با ثابت دی­الکتریک نسبی را در کلیه سطوح بسامد و رطوبت با ثابت دی­الکتریک اتلافی و هدایت الکتریکی را در بسامدهای KHz100 و KHz700 با دقت قابل قبولی پیش­بینی نماید.

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Effect of moisture content and frequency in dielectric properties of two paddy variety

نویسندگان [English]

  • Mohammad Tahmasebi 1
  • Reza Tabatabaei kolor 2
  • Jafar Hashemi 2
1 MSc. Student, Faculty of Crop Engineering, Sari University of Agricultural Sciences and Natural Resources
2 Scientific member/Department of Mechanics of Biosystems Engineering, Faculty of Crop Engineering, Sari University of Agricultural Sciences and Natural Resources
چکیده [English]

Dielectric properties of agricultural products is one of the most important physical properties of Agricultural and food products and these properties are used heavily in developing as new technology for use in agriculture and related industries. Therefore, in this study investigated the changes in the dielectric properties of Pazhohesh and Ghaem varieties of paddy as a dielectric material four moisture content levels (13%, 16%, 19% and 22% dry basis) and frequency levels (100, 300, 500, 700 KHz) at a factorial design on a completely randomized design base; Results showed that there was no significant difference between investigated varieties in terms of dielectric properties. Also the Moisture content has significant and multiplier effect in all dielectric properties of paddy. It also increases the frequency of the input voltage leads to increased conductivity of paddy, but the reverse effect on the relative dielectric constant and loss factor. Also among interaction effects these factors, only the interaction of moisture and frequency, Has a significant influence on the relative dielectric constant and loss factor.

کلیدواژه‌ها [English]

  • Dielectric properties
  • frequency
  • Paddy
  • Moisture content
  • Variety
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