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

Diezma Iglesias, Belen; Ruiz-Altisent, Margarita y 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.

Descripción

Título: Vibrational analysis of seedless watermelons: use in the detection of internal hollows
Autor/es:
  • Diezma Iglesias, Belen
  • Ruiz-Altisent, Margarita
  • Jancsók, P.
Tipo de Documento: Artículo
Título de Revista/Publicación: Spanish Journal of Agricultural Research
Fecha: 2005
Volumen: 3
Materias:
Palabras Clave Informales: acoustic impulse response, experimental modal analysis, non-destructive methods.
Escuela: E.T.S.I. Agrónomos (UPM) [antigua denominación]
Departamento: Ingeniería Rural [hasta 2014]
Grupo Investigación UPM: LPF-TAGRALIA
Licencias Creative Commons: Reconocimiento - Sin obra derivada - No comercial

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URL Oficial: http://revistas.inia.es/index.php/sjar/issue/view/9

Resumen

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.

Más información

ID de Registro: 6411
Identificador DC: http://oa.upm.es/6411/
Identificador OAI: oai:oa.upm.es:6411
Depositado por: Memoria Investigacion
Depositado el: 17 Mar 2011 12:12
Ultima Modificación: 20 Abr 2016 15:42
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