بررسی ارتباط مقدار کوفتگی میوه گلابی در اثر فشارلبه پهن با روش سی تی اسکن و بعضی از خواص فیزیکی گلابی

نویسندگان
محسن آزادبخت 1
محمد واحدی ترشیزی 2
محمدجواد محمودی 2
1 دانشیار گروه مهندسی مکانیک بیوسیستم، دانشکده آب و خاک، دانشگاه علوم کشاورزی و منابع طبیعی گرگان
2 دانشجوی کارشناسی ارشد گروه مهندسی مکانیک بیوسیستم، دانشکده آب و خاک، دانشگاه علوم کشاورزی و منابع طبیعی گرگان
چکیده
بررسی روابط بین خواص فیزیکی مانند جرم، حجم و ابعاد میوه‌ها از اهمیت بالایی برخوردار است. در این تحقیق مقدار کوفتگی گلابی در اثر بار فشاری لبه پهن با کمک آزمون غیرمخرب سی‌تی‌اسکن تعیین شد و به بررسی ارتباط مقدار کوفتگی با خواص فیزیکی گلابی و دوره انبارداری پرداخته‌شد. قبل از بارگذاری تعداد 50 گلابی با استفاده از سی‌تی‌اسکن بررسی‌شده و تعداد 27 گلابی که درصد پوسیدگی آن‌ها صفر بود انتخاب شدند و ابعاد گلابی‌ها (طول، عرض، ضخامت) گلابی‌ها اندازه‌گیری شد و خواصی مانند قطر معادل، قطر میانگین هندسی و مساحت سطح رویه محاسبه گردید. سپس گلابی‌های انتخابی تحت بارگذاری شبه استاتیکی با فشار لبه پهن با سه نیروی 70، 100 و 130 نیوتن قرار گرفتند و انبارداری 5، 10 و 15روزه برای بررسی تأثیر نیروهای وارده انتخاب شد. سپس بعد از بارگذاری و انبارداری با استفاده از سی‌تی‌اسکن در هر دوره از انبارداری میزان پوسیدگی محاسبه گردید. نتایج آزمایشات نشان داد که یک رابطه معکوس و غیر معنی‌دار بین قطر معادل و قطر میانگین هندسی با درصد پوسیدگی برقرار بود. همچنین برای سطح رویه و درصد پوسیدگی یک رابطه مثبت و غیر معنی‌دار برقرار است. در نهایت مشخص شد که هرچه گلابی سطح بیشتری را داشته باشند میزان درصد پوسیدگی نیز افزایش‌ می‌یابد.
کلیدواژه‌ها
خواص فیزیکی
سی تی اسکن
غیر مخرب
گلابی
کوفتگی

موضوعات

عنوان مقاله English

Determination amount of pear bruises due to wide edge pressure via CT scan method and relation them with some physical properties pear

نویسندگان English

Mohsen Azadbakht 1
Mohammad Vahedi Torshizi 2
Mohammad Javad Mahmoodi 2
1 Associate Professor, Department of Biosystem mechanical engineering, Faculty of Water and Soil, Gorgan University of Agricultural Sciences and Natural Resources.
2 MSc Student, Department of Biosystem mechanical engineering, Faculty of Water and Soil, Gorgan University of Agricultural Sciences and Natural Resources.
چکیده English

The study of the relationships between physical properties such as mass, volume and size of fruits is very important.In this research via CT scan, the relationship between physical properties of pears and storage times with bruise due to the loading force was investigated. Before loading and storing, 50 pears were examined using CT scan and 27 pears with zero bruise percentage were selected. Dimensions of pears (length, width, thickness) were measured, then properties such as the equivalent diameter, geometric mean diameter, spherical coefficient, surface area and aspect ratio of calculus were calculated, then selected pears were subjected to quasi-static loading with a thin edge pressure with three forces of 70, 100 and 130 N and 5, 10 and 15 d storage was used to investigate the effect of forces on pears. Then, after loading and storing, using the CT scan in each period of storage, the rate of pear bruise was calculated. The results of the experiments showed that there is an inverse relation between geometric diameter, arithmetic and equivalent diameter, spherical coefficient and aspect ratio with the bruise percentage. Also a direct and unreasonable relationship between the level of the surface area and the percentage of bruising. Overall, it was found that, the pears have a higher surface area, the higher the percentage of a bruise.

کلیدواژه‌ها English

Pear
CT scan
Non-destructive
Physical properties
Bruise
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