evaluation of a non-destructive impact sensor to determine on-line fruit firmness evaluación de un sensor de impacto no-destructivo para la determinación de la firmeza de frutos en líneas de manipulación

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ID: 151216
2010
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Abstract
A non-destructive impact sensor to measure on-line fruit firmness was evaluated. This sensor is an adaptation of a static model used in the laboratory to measure fruit quality and was installed in an experimental fruit packing line with a commercial sizer chain. The firmness index is related to the acceleration-time curve supplied by an accelerometer attached to an impacting arm. The main objective of this study was to evaluate sensor performance and sources of variation. We made classification trials on three fruits: peaches (Prunus persica (L.) Batsch), apples (Malus domestica Borkh.), and pears (Pyrus communis L.), as well as working trials, such as placing the fruit, orientation, and others. The sensor works correctly at a speed of 7 fruits s-1 (0.63 m s-1) and allows fruit classification at three levels of firmness using specific software. Good discrimination was obtained only for soft peaches. There were variations in results between different fruits and different parts of the same fruit mainly due to the non-uniformity of fruit shape and lack of ripeness homogeneity of each one.
Se evaluó un sensor de impacto no destructivo para medir firmeza de frutas en líneas de manipulación. Este sensor es una adaptación de la versión estática utilizada en algunos laboratorios de calidad de frutas, el cual fue modificado e instalado en una línea experimental de manipulación de fruta que contaba con un calibrador comercial. La firmeza de los frutos está relacionada con la curva de aceleración-tiempo que suministra un acelerómetro unido a un brazo que impacta la fruta. El objetivo del presente trabajo fue evaluar funcionamiento y fuentes de variación del sensor. Para ello se realizaron ensayos de clasificación con duraznos (Prunus persica (L.) Batsch), manzanas (Malus domestica Borkh.), y peras (Pyrus communis L.), y ensayos de funcionamiento como pruebas de posicionamiento del fruto, orientación, entre otras. El sensor funciona correctamente a una velocidad de siete frutos por segundo (0,63 m s-1). Este sistema permite la clasificación de la fruta en tres niveles de firmeza, mediante un software especifico. Se obtuvo buena discriminación sólo de duraznos blandos con respecto al resto. Se encontraron variaciones entre diferentes frutos y diferentes partes del mismo fruto, debido mayormente a la diferencia de forma y a la poca uniformidad de la madurez en cada uno de los frutos.
Reference Key
homer2010chileanevaluation Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors ;Ian Homer;Francisco Javier García-Ramos;Jaime Ortiz-Cañavate;Margarita Ruiz-Altisent
Journal journal of molecular cell biology
Year 2010
DOI
DOI not found
URL
http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392010000100007
Keywords
peach fruit quality

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