Vibrational analysis of seedless watermelons: use in the detection of internal hollows

Diezma Iglesias, Belen and Ruiz-Altisent, Margarita and Jancsók, P. (2005). Vibrational analysis of seedless watermelons: use in the detection of internal hollows. "Spanish Journal of Agricultural Research", v. 3 (n. 1); pp. 52-60. ISSN 1695-971X.

Description

Title: Vibrational analysis of seedless watermelons: use in the detection of internal hollows
Author/s:
  • Diezma Iglesias, Belen
  • Ruiz-Altisent, Margarita
  • Jancsók, P.
Item Type: Article
Título de Revista/Publicación: Spanish Journal of Agricultural Research
Date: 2005
ISSN: 1695-971X
Volume: 3
Subjects:
Freetext Keywords: acoustic impulse response, experimental modal analysis, non-destructive methods.
Faculty: E.T.S.I. Agrónomos (UPM) [antigua denominación]
Department: Ingeniería Rural [hasta 2014]
UPM's Research Group: LPF-TAGRALIA
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

The internal quality of fruit can be non-invasively tested using systems based on vibrational characteristics. In this work, acoustic impulses were used to detect internal hollows in watermelons; the change in the signal revealing the problem. Frequency spectrum variables were analysed for their potential as non-destructive predictors of this defect. The band magnitude variables, obtained from the integral of the spectrum magnitudes between two frequencies, best predicted internal disorders. Experimental modal analysis was used to investigate the vibrational performance of watermelons and to determine the best positions for the impact point and response measurement microphone. A firsttype spherical mode and its resonant frequency was the best indicator of internal quality problems. Finite element modal analysis was performed to establish a watermelon shape/characteristics model and to compare theoretical and experimental results.

More information

Item ID: 6411
DC Identifier: http://oa.upm.es/6411/
OAI Identifier: oai:oa.upm.es:6411
Official URL: http://revistas.inia.es/index.php/sjar/issue/view/9
Deposited by: Memoria Investigacion
Deposited on: 17 Mar 2011 12:12
Last Modified: 20 Apr 2016 15:42
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