This paper presents a non-destructive method for evaluating the firmness of fruits. Three novel stiffness indexes based on acoustic methods and involving Young's modulus and sound propagation velocity are proposed. The theoretical background leading to their formulation from physical considerations is presented. The effectiveness of the considered indexes is tested by means of an experimental setup built with two piezoelectric transducers contacting several samples of kiwifruits during their ripening process. The dependency on the geometrical position of the contact and the robustness against simplifying assumptions, such as uniform density or roundness, is investigated. The obtained experimental results show that stiffness indexes based on propagation delays are more rapid and reliable than those based on fruit resonance in assessing the ripeness degree.

E. Macrelli, A. Romani, R. P. Paganelli, E. Sangiorgi, M. Tartagni (2013). Piezoelectric transducers for real-time evaluation of fruit firmness. Part I: Theory and development of acoustic techniques. SENSORS AND ACTUATORS. A, PHYSICAL, 201, 487-496 [10.1016/j.sna.2013.07.033].

Piezoelectric transducers for real-time evaluation of fruit firmness. Part I: Theory and development of acoustic techniques

MACRELLI, ENRICO;ROMANI, ALDO;PAGANELLI, RUDI PAOLO;SANGIORGI, ENRICO;TARTAGNI, MARCO
2013

Abstract

This paper presents a non-destructive method for evaluating the firmness of fruits. Three novel stiffness indexes based on acoustic methods and involving Young's modulus and sound propagation velocity are proposed. The theoretical background leading to their formulation from physical considerations is presented. The effectiveness of the considered indexes is tested by means of an experimental setup built with two piezoelectric transducers contacting several samples of kiwifruits during their ripening process. The dependency on the geometrical position of the contact and the robustness against simplifying assumptions, such as uniform density or roundness, is investigated. The obtained experimental results show that stiffness indexes based on propagation delays are more rapid and reliable than those based on fruit resonance in assessing the ripeness degree.
2013
E. Macrelli, A. Romani, R. P. Paganelli, E. Sangiorgi, M. Tartagni (2013). Piezoelectric transducers for real-time evaluation of fruit firmness. Part I: Theory and development of acoustic techniques. SENSORS AND ACTUATORS. A, PHYSICAL, 201, 487-496 [10.1016/j.sna.2013.07.033].
E. Macrelli; A. Romani; R. P. Paganelli; E. Sangiorgi; M. Tartagni
File in questo prodotto:
Eventuali allegati, non sono esposti

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/176878
 Attenzione

Attenzione! I dati visualizzati non sono stati sottoposti a validazione da parte dell'ateneo

Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 34
  • ???jsp.display-item.citation.isi??? 27
social impact