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Physical Attributes

Size: 10 – 150 µm for powdered milk 0.5 m for watermelons. Physical Attributes Size, Shape, Volume, Density, Porosity and Particle Size Distribution Agricultural and food materials have varying physical attributes.

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Physical Attributes

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  1. Size:10 – 150 µm for powdered milk 0.5 m for watermelons Physical Attributes Size, Shape, Volume, Density, Porosity and Particle Size Distribution Agricultural and food materials have varying physical attributes Shape:Spherical – canned peas Ellipsoidal – orange, grapefruit Long/narrow – oats امین اله معصومی

  2. 􀂄 Square fruit امین اله معصومی

  3. Size and Shape Size described by dimensions of projected area length, width and thickness used for grains and seeds امین اله معصومی

  4. 3 characteristic dimensions 1) Major diameter (a) – longest dimension of the maximum projected area 2) Intermediate diameter (b) – min. dimension of the maximum projected area or longest dimension of the min. projected area 3) Minor diameter (c) – shortest dimension of the minimum projected area امین اله معصومی

  5. امین اله معصومی

  6. Caliper METHODS • Micrometer • Overhead امین اله معصومی

  7. Machine Vision امین اله معصومی

  8. امین اله معصومی

  9. Mean diameter Equivalent diameter (geometric mean diameter) Equivalent diameter of an object: measure V and calculated Characterizing size by single dimension امین اله معصومی

  10. Shape used to describe agricultural & biological materials • Describes processed food • Shape can be characterized by using similarity to geometric solids such as: – Sphere – Prolate spheroid (بیضی دوران کرده حول محور بزرگ) – Oblate spheroid (بیضی دوران کرده حول محور بزرگ) – Triaxial ellipsoid – Truncated cone امین اله معصومی

  11. Back امین اله معصومی

  12. امین اله معصومی

  13. امین اله معصومی

  14. Technique to quantify differences in shape of agricultural materials: • Spherecity – ratio of volume of triaxial ellipsoid with equivalent diameters to the volume of sphere which circumscribes the object امین اله معصومی

  15. امین اله معصومی

  16. Number of seed; At least 100 امین اله معصومی

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