Nondestructive detection system and method for internal defect of fruit

Abstract

Disclosed are a nondestructive detection system and a method for an internal defect of a fruit. The system comprises an aluminum profile frame, a conveyor belt, a tray, a pulse type gas spray device, and a laser Doppler vibrometer; when a piece of fruit passes a detection station, the pulse type gas spray device excites the fruit to vibrate, and the laser Doppler vibrometer evaluates a vibration response signal of the fruit; a time-domain vibration characteristic parameter and a frequency-domain vibration characteristic parameter are acquired by means of a wavelet transform and a fast Fourier transform; and a prediction model for an internal defect of the fruit is established on the basis of the acquired time-domain and frequency-domain vibration characteristic parameters.

Dependencies are inferred from the claim text.