Low-field nuclear magnetic resonance nondestructive detection line applicable to dried shelled fruits

Abstract

The invention discloses a low-field nuclear magnetic resonance nondestructive detection line applicable to dried shelled fruits. In the prior art, a method for detecting mildew and insect attack of the dried shelled fruits is achieved by generally removing sample peels for discriminating after random sampling, and no nondestructive detection scheme exists. The low-field nuclear magnetic resonancenondestructive detection line integrates low-field nuclear magnetic resonance equipment and a dried shelled fruit conveying device, so that batch nondestructive detection of the dried shelled fruits sent for detection can be achieved. Principal component analysis is performed on existing sample data, a scatter diagram is drawn, and good and bad seed area division and boundary equation calculationare performed to obtain a suitable mathematical model, so that the analysis rate of the production line sample data is increased. In the detection process, the transverse magnetization intensity signal amount of the dried shelled fruits is detected according to a low-field nuclear magnetic resonance technology, and then through comparison with the constructed mathematical model, the quality conditions of good seeds, mildewy seeds, and wormy seeds of the dried shelled fruits are quickly obtained, so that the accuracy can reach 85% or above.

Description

technical field [0001] The invention relates to a low-field nuclear magnetic resonance non-destructive detection line suitable for dried shelled fruits, specifically relates to the use of low-field nuclear magnetic resonance technology to realize mildew detection of dried shelled fruit pulp, and belongs to the field of rapid nondestructive analysis of food. Background technique [0002] Dried fruit is a processed food product with low water content obtained by dehydrating and drying fresh fruit. During storage, due to factors such as the environment and storage time, mildew and insect changes in the pulp are prone to occur, especially It is longan, lychee and other shelled fruits, and the difference between bad seeds and good seeds cannot be distinguished in appearance, which may cause manufacturers to mix moldy seeds and insect seeds into good seeds during the retail packaging process, affecting consumers' eating experience. In the prior art, the method for detecting mildew...

AI Technical Summary

Problems solved by technology

[0002] Dried fruit is a processed food product with low water content obtained by dehydrating and drying fresh fruit. During storage, due to factors such as the environment and storage time, mildew and insect changes in the pulp are prone to occur, especially It is longan, lychee and other shelled fruits. It is impossible to distinguish the difference between bad seeds and good seeds in appearance, which may cause manufacturers to mix moldy seeds and insect seeds into good seeds during the retail packaging process, which affects consumers' eating experience.

In the prior art, the detection method for mildew and insect change in dry longan is usually to remove the sample peel first after random sampling, and observe the state of the pulp and the browning area on the inner surface of the peel. There is no effective non-destructive testing method.

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