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vol. 11, nr. 1 (2008)
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Comparison of puncture test, acoustic emission and spatial-temporal speckle correla-tion technique as methods for apple quality evaluation
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Artur Zdunek1, Ludmyla Frankevych2, Krystyna Konstankiewicz1, Zbigniew Ranachowski3
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1 Institute of Agrophysics, Polish Academy of Sciences, ul. Doświadczalna 4, 20-290 Lublin |
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2 Karpenko Physico-Mechanical Institute of NAS Ukraine, ul. Naukova 5, Lviv 79601, Ukraine |
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3 Institute of Fundamental Technological Research, Polish Academy of Sciences, ul. Świętokrzyska 21, 00-049 Warszawa |
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vol. 11 (2008), nr. 1,
pp. 303-315
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abstract:
A major quality problem for producers and consumers of apples is their softening during storage. This paper presents comparison of three methods for monitoring quality changes of apples during shelf-life storage: puncture test with acoustic emission and spatial-temporal speckle correlation technique. Firmness, acoustic emission counts and cross-correlation coefficient difference obtained by these methods, respectively, were analysed. The parameters show different correlation coefficients with time of storage. The highest correlation coefficient was obtained by the non-destructive spatial-temporal correlation technique. Puncture test with acoustic emission shows also significant changes with time and these methods provide information about mechanical properties and especially about the fracture proper-ties of the material. Higher correlation coefficient between firmness and acoustic emission counts was obtained than between firmness and cross-correlation coefficient difference. The experiment has shown that for testing the quality of apples there is no difference related to the side of apples.
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keywords:
nondestructive method, biospeckle, acoustic emission, puncture
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original in:
English
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