Process and apparatus for the measurement of the hardness and for the selection of agricultural products
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United States of America Patent
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Sep 13, 2016
Grant Date -
Dec 19, 2013
app pub date -
Mar 22, 2012
filing date -
Apr 5, 2011
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Abstract
Method for measuring the hardness of agricultural products includes: implementing a test program suitable for identifying and selecting one or more indices (S3, S4) which can be measured with a non-destructive test on a respective product/fruit, correlated with the hardness (Du) of the same product/fruit, measured by a respective penetration test; and calculating the coefficients that define the straight line representative of the linear correlation between said indices and the hardness for the respective product. The method is implemented with the operations of: applying on the product a dynamic force, preferably of impulsive type; detecting the mechanical reaction through at least a piezoelectric transducer capable of generating an electric signal based on the application or transmission of said dynamic force through the respective kiwi fruit; and analyzing said electric signal relative to the fruit.
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