Watermelon quality NDT (non-destructive testing) method and device

Abstract

The invention relates to the technical field of melon and fruit type detection, and discloses a watermelon quality NDT (non-destructive testing) method and device. The watermelon quality NDT method comprises the following steps of: selecting a plurality of sample watermelons, respectively measuring the initial volume of each sample watermelon by adopting a water drainage method, acquiring sample watermelon image information and transmitting the information to a computer by utilizing a CCD (charge coupled device) camera, calculating the length, the width and the height of each sample watermelon after processing image information, and establishing a volume model of each watermelon to be tested, wherein the volume model is as follows: V=4 / 3*K*a*b*c; fitting a K-value according the initial volume, the length, the width and the height of each sample watermelon, measuring the volume of each watermelon to be tested according the volume model, measuring the quality of each watermelon, calculating the density according to the quality and the volume, and finally judging the quality of the watermelon to be tested. According to the invention, a digital image processing technique, a transmission system and a computer control technique are combined, watermelon quality non-destructive classification and identification are realized, the operation is simple and the detection performance is stable.

Description

technical field [0001] The invention relates to a melon and fruit detection technology, in particular to a watermelon quality non-destructive detection method and device. Background technique [0002] The traditional method of identifying the quality of watermelon is to judge the quality by the sound of beating the watermelon. This method depends entirely on the experience of the operator, the identification speed is slow, and it is easy to cause damage to the watermelon. At present, the following relatively objective and simple methods have been developed to identify the quality of watermelons: [0003] 1. Labeling method: Apply the same label to the same batch of watermelons. After a period of time, cut the watermelon and sample the quality of the watermelon. This is a destructive testing method, and the testing results using the sampling method are unstable; [0004] 2. Bulk density method: measure the volume and quality of watermelon, and judge its quality by the densit...

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Problems solved by technology

[0006] 4. Electronic equipment sound identification method: judge the watermelon quality by measuring the resonant frequency of the watermelon, collect the sound through the microphone, and give the measurement result after amplification and filtering. This kind of method still needs to touch the watermelon, which is easy to cause damage to the watermelon

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