Development of a Sorting System for Fruits and Vegetables Based on Acoustic Resonance Technique

摘要

Sorting of fresh fruits and vegetables is essential in order to minimize post-harvest losses. In practice, it is carried out by visual inspection or destructive testing procedures; both of which are labour and time intensive processes. Hence, in recent years, numerous research works have focussed on developing rapid, accurate and non-destructive techniques for such applications. The present work was aimed to develop a sorting system prototype based on non-destructive acoustic resonance technique. The developed system can sort fruits and vegetables into different classes, based on acoustic responses. The performance of the system was evaluated by conducting studies to determine the maturity stages of sapota and to check the presence of internal defects in brin-jal. Results were in good agreement (overall classification efficiency of 89% and 87% respectively) with those obtained by conventional destructive testing procedures.