บทคัดย่องานวิจัย

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Performance of an experimental on-line computer controlled apple grader using acoustic resonance sensing.

Terdwongworakul, A.; Cowell, P. A.; Stenning, B. C.;

Harvest and postharvest technologies for fresh fruits and vegetables. Year: 1995 Pages: 136-142 Ref: 5 ref.

1995

บทคัดย่อ

Performance of an experimental on-line computer controlled apple grader using acoustic resonance sensing.

 

An experimental on-line computer controlled apple grader using acoustic resonance sensing is described. A stiffness coefficient based on the second resonant frequency, which corresponds to the principal mode of vibration of the flesh of the fruit, and the mass of the apple, offers a useful criterion for sorting. Engineering problems are discussed and some results of the performance testing are given. The experimental machine was capable of sorting apples into 3 grades, hard, firm and soft, with less than 4% error.