Development of Automatic Firmness Measurement System for Major Fruits using Vibration Characteristics

과일의 진동특성을 이용한 주파수 영역에서의 경도측정

Characteristics of fruit vibrations are related to the material properties of the fruit. A new method for spectral analysis is developed and used for the non-destructive estimation of fruit firmness. The resonant frequency of the fruit is related to its firmness. However, the determination of the resonant frequency is not easy So the smoothing method is applied to the frequency spectra to obtain a robust estimate for the resonant frequency.