The Watermelon Auto-grading System Based onVirtual Instrument Technology

摘要

The mechanical and physical characteristic s of the watermelon are analyzed, and therelationship between the ripe index and the vibration characteristics is given in this paper. The resultsindicate that the weight and the natural frequency of watermelon are the two primary parameterscorrelated with the ripeness. The ripe indexf2m2/3 is found from the test data, and the variationrange of the ripe index for the ‘Jinxin’ watermelon, which grows in Beijing, is determined. Thismethod can be used to other kind of watermelon, but the difference being only in the variation rangeof the ripe index.