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Microfocus radiography method for detecting hidden defects and assessing the quality of nuts cultivars

DOI: 10.17586/1606-4313-2024-23-2-64-71
UDC 539.264

Microfocus radiography method for detecting hidden defects and assessing the quality of nuts cultivars

Sevastyanova Anna D., Bazarnova Yulia G., Priyatkin N.S.

For citation: Sevastyanova A.D., Bazarnova Yu.G., Pryatkin N.S. Microfocus radiography method for detecting hidden defects and assessing the quality of nuts cultivars. Journal of International Academy of Refrigeration. 2024. No 2. p. 64-71. DOI: 10.17586/1606-4313-2024-23-2-64-71

Abstract
A promising direction for improving methods for quality control of agricultural products is to study the possibility of identifying hidden (internal) defects in agricultural products through the use of non-destructive methods, for example, spectral analysis methods, including the method of microfocus radiography, which allows to identify defects in nuts cultivars through visualization of their internal structure. The aim of the study was to establish a correlation between the parameters of radiographic projections and internal defects of walnut and almond and the possibility of using the microfocus radiography method to control the quality of whole nuts cultivars. The objects of study were the samples of walnut (Juglans regia L.) and almond (Prunus amygdalus Batsch), grown at the experimental station of the Nikitsky Botanical Garden (Republic of Crimea), the harvest of 2020 and 2021. To obtain radiographic digital images of nuts, a multifunctional mobile radiographic installation PRDU-02 was used. The analysis of the obtained digital radiographic images of nuts was carried out in two stages. At the stage of integral processing of digital radiographic images, the average brightness of the X-ray projection (E, brightness unit) and the area of the X-ray projection (S, cm2) were calculated. At the stage of phase analysis, the proportion of the void area was determined and the proportion of the total area of th`e nucleus with the shell from the total area of the X-ray projection (Sblank/S,% and Sа+с/S,%). The obtained values of the correlation coefficients indicate a high correlation between the mass and the X-ray image parameters E and S for the walnut. A moderate correlation of parameters E (RXY=0.64) and S (RXY=0.61) was found for almond. The correlation between the mass of nuts and the proportion of the total area of the kernel and shell from the total area of the X-ray projection, Sа+с/S, is less pronounced, which can be explained by the imposition of an error in the phase analysis, as a result of which the values of Sа+с/S were obtained.

Keywords: non-destructive quality control methods, walnut, almond, internal defects, microfocus radiography, X-ray projection parameters, correlation, nut weight.

All references

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