INTERNAL QUALITY (IQ) FIRMNESS TESTING SYSTEM. MACHINE DERIVES THE FIRMNESS OR OTHER INTERNAL QUALITY ATTRIBUTES OF INDIVIDUAL FRESH PRODUCE FOR THE PURPOSE OF PRODUCT MANAGEMENT IN THE WORLDWIDE FRESH PRODUCE INDUSTRY. THE MACHINE MEASURES THE ELECTRICAL RESPONSE FROM A PIEZOELECTRIC SENSOR AT FOUR SEPARATE LOCATIONS ON THE SURFACE OF A SINGLE FRUIT. FROM THESE MEASURES, THE SYSTEM PREDICTS, FOR EVERY FRUIT ON THE LINE, THE ELASTIC PROPERTY, WHICH REFLECTS THE RIPENESS LEVEL OF THAT FRUIT.

CLASSIFICATION IS DETERMINED ACCORDING TO GIRS 1 AND 6 AND THE TEXT OF CN CODE 84336000: MACHINE FOR GRADING FRUIT OR OTHER AGRICULTURAL PRODUCE.