METHOD FOR JUDGING INNER QUALITY OF FRUIT AND VEGETABLE, AND X-RAY LIGHT PATH LENGTH MEASUREMENT METHOD USED FOR THE SAME

摘要

PROBLEM TO BE SOLVED: To provide a judgment method of the inner quality of fruit and vegetables for detecting a non-ripening state or an over-ripening state such as wetting state that has not been detected conventionally regardless of large fruit and vegetables such as melons and watermelons. SOLUTION: In the method for judging the inner quality of the fruit and vegetables based on the amount of X rays through the fruit and vegetables by applying X rays to them, amount of applied X rays Pin to the fruit and vegetables and amount of transmitted X rays Pout through the fruit and vegetables are obtained, and at the same time, physical length L where the X rays pass through the fruit and vegetables is obtained, and it is judged to be abnormal in the case of|log(Pin/Pout)-α×L}/(αk-α)|>0 according to an absorption coefficientαof X rays in normal fruit and vegetables that have been measured in advance and an absorption coefficientαk of X rays in an abnormal section in the fruit and vegetables.