Evaluation of a Low-cost Multispectral Device for Grape Ripening Status Assessment under Field Conditions

• Miguel Noguera ^[1] ; Borja Millán ^[1] ; Ana Sayago ^[1] ; Ángeles Fernández-Recamales ^[1] ; José Manuel Andújar Márquez ^[1]
  1. [1] Universidad de Huelva

     Universidad de Huelva

     Huelva, España

     
• Localización: Actas de las IV Jornadas ScienCity 2021: Fomento de la Cultura Científica, Tecnológica y de Innovación en Ciudades Inteligentes / coord. por Tomás Jesús Mateo Sanguino , José Manuel Lozano Domínguez, Manuel Joaquín Redondo González, Iñaki Josep Fernández de Viana González, Miguel Ángel Rodríguez Román, 2022, ISBN 9798410791717, págs. 31-34
• Idioma: inglés
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• Resumen

  • The present work aims to evaluate a low-cost multispectral device for non-destructive grape ripening status assessment. The proposed device was specially developed for infield application and is based on a multispectral sensor, with a spectral response of 18 channels in a range from 410 to 940 nm. The experimental validation was carried out in a commercial vineyard in Rociana del Condado, Huelva. The proposed device was used to analyse 50 grape samples under field conditions. After being processed with the proposed device, the grapesamples were analysed using standard chemical methods togenerate ground truth values of ripening status indicators (soluble solid content, acidity, and pH). The 18-band reflectance measurements were used as input variables for developingartificial neural network models to estimate the three targetparameters. The obtained results were promising, which pavesthe way for the implementation of a portable grape ripeningappraisal system affordable for grape growers.