Method for determining the quality of fruit and berries and...

G - Physics – 01 – N

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G01N 21/64 (2006.01) B07B 13/00 (2006.01) B07C 5/342 (2006.01) G01N 33/02 (2006.01)

Patent

CA 2337903

The invention relates to a method for determining the maturity and quality of fruit and berries by measuring the quantity of chlorophyll fluorescence and to an apparatus for sorting fruit and berries. The method is based on determining the quantity of fluorescence by chlorophyll of fruit and berry. The invention comprises causing the chlorophyll molecule to fluoresce by irradiating the fruit and berries with electromagnetic radiation of a suitable wavelength and measuring the degree of fluorescence. Advantages of the method are the very high sensitivity, its being completely non-destructive and the very high speed. These advantages of the invention make it possible to construct a sorter apparatus in which fruit and berries are selected on the basis of the quantity of chlorophyll. Because the intensity of the chlorophyll fluorescence is directly related to the quantity of chlorophyll, it will now be possible to sort fruit and berries as to the stage of ripening and quality.

L'invention concerne un procédé pour déterminer la maturité et la qualité des fruits et des baies par la mesure de l'intensité de la fluorescence chlorophyllienne ainsi qu'un appareil pour trier les fruits et les baies. Selon le procédé, on détermine l'intensité de la fluorescence chlorophyllienne provenant des fruits et des baies. L'invention consiste à provoquer la fluorescence d'une molécule de chlorophylle en irradiant les fruits et les baies avec des rayons électromagnétiques ayant une longueur d'onde appropriée puis à mesurer le degré de fluorescence. Les avantages de ce procédé résident dans sa sensibilité très élevée, dans son caractère absolument non destructif et dans sa vitesse extrêmement élevée. Ces avantages permettent de construire une trieuse dans laquelle les baies et les fruits sont sélectionnés en fonction de la quantité de chlorophylle. Comme l'intensité de la fluorescence chlorophyllienne est directement liée à la quantité de chlorophylle, il est désormais possible de trier les fruits et les baies en fonction de leur maturité et de leur qualité.

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