Transactions of the ASAE · 1982 · 48 citations · 0 references
AgricultureFood SciencePhysicsFood RheologyFruit ScienceMechanical Behavior Of MaterialsFruit QualityFruit Quality EvaluationFruit SortingImpact MechanicsElastic ModulusFast Fourier TransformFirmnessFourier TransformFrequency Spectrum AnalysisFruit Firmness MeasurementImpact ForceImpact Force Distribution
ABSTRACT THE application of fast Fourier transform algorithms to the impact force of a fruit falling on a rigid plate was discussed. Analysis of the force in the frequency do-main indicated that there exists a relationship between the magnitude of the force components and firmness parameters of the fruit as given by the elastic modulus or Magness-Taylor values. It was found that non-destructive sorting for firmness could be accomplished based on the electronic processing of the fruit impact force measurement.