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Applying Laser Doppler Vibrometer to detecting the elastic properties of watermelon
Published by the American Society of Agricultural and Biological Engineers, St. Joseph, Michigan www.asabe.orgCitation: 2015 ASABE Annual International Meeting 152188987.(doi:10.13031/aim.20152188987)
Authors: Zongmei Gao, Di Cui
Keywords: Laser Doppler vibrometer, watermelon, modulus of elasticity, stiffness, ripeness.
Abstract. The modulus of elasticity, which is the ratio of stress to strain within the elastic range of the material, is an indication of rigidity and stiffness of the material and not an indication of its degree of elasticity. The elastic characteristics of fruit are considered to be related to the firmness of the flesh; reflecting maturity and freshness. A Laser Doppler Vibrometer（LDV）was applied to evaluate the rheological properties of unripe, ripe and overripe watermelons. A stiffness coefficient (