Non-destructive fruit firmness sensors: a review

  • F.J. García-Ramos Universidad de Zaragoza. Huesca
  • C. Valero UPV. Madrid
  • I. Homer Universidad Politécnica de Madrid. Madrid
  • J. Ortiz-Cañavate Universidad Politécnica de Madrid. Madrid
  • M. Ruiz-Altisent Physical Properties Laboratory. Polytechnic University of Madrid. E.T.S.I.A.. Madrid
Keywords: Fruits, Quality, Firmness, Nondestructive testing, Measurement, Sensors

Abstract

The development of sensors to measure fruit internal quality variables is one of the challenges of post-harvest technology. Several variables can currently be measured, including sugar content, acid content, firmness and internal disorders. This article reviews the state of the art of non-destructive fruit firmness sensors. These include static and on-line sensors that use different technologies for determining force-deformation relationships, impact forces, the acoustic response to vibrations or impacts, and optical properties. The rebound technique and nuclear magnetic resonance is also used. Although many techniques are under development, some companies already market instruments that determine the internal quality of fruit.

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Published
2005-03-01
How to Cite
García-Ramos, F., Valero, C., Homer, I., Ortiz-Cañavate, J., & Ruiz-Altisent, M. (2005). Non-destructive fruit firmness sensors: a review. Spanish Journal of Agricultural Research, 3(1), 61-73. https://doi.org/10.5424/sjar/2005031-125
Section
Invisible