Please use this identifier to cite or link to this item: http://repositorio.ufla.br/jspui/handle/1/15622
Title: Avaliação do desprendimento do fruto do cafeeiro por vibração: um estudo de caso
Other Titles: Evaluation of coffee fruit detachment by vibration: a case study
Authors: Rabelo, Giovanni Francisco
Dourado, David Cardoso
Rufino, Carlos Antônio
Botega, Juliana Vilela Lourençoni
Castro, Carlos Alberto Carvalho
Keywords: Café – Colheita
Agricultura – Mecanização
Colheita semimecanizada
Coffee – Harvesting
Farm mechanization
Semi-mechanized harvesting
Issue Date: 6-Nov-2017
Publisher: Universidade Federal de Lavras
Citation: GOMES, J. B. Avaliação do desprendimento do fruto do cafeeiro por vibração: um estudo de caso. 2017. 117 p. Tese (Doutorado em Engenharia Agrícola)-Universidade Federal de Lavras, Lavras, 2017.
Abstract: The cherry phase of the coffee is the most widely used for marketing and its harvest is carried out in several ways, the most common being manual, semi-mechanized and mechanized. In order to contribute to the efficiency of this process, this work aims to evaluate, in a semi-mechanized harvesting system, in which a vibrator is attached to the coffee plant branch,what frequency of the vibration is responsible for taking the largest amount of fruit of that stage. In this regard, several funding instruments have been tested and the electret microphone was the best adapted to the conditions of branches and fruits of plants installed in the laboratory of the Center of Instrumentation Development Applied to Agriculture, of the Federal University of Lavras. There, under actual conditions of planting, a preliminary study was carried out with the green fruit stage, cherry and raisins, to ascertain the characteristics of shape, weight, size, color and especially the peel strength conditions of the peduncle. The values found in this analysis were the basis for the determination of operating parameters of the instrument for the main experiment. In the latter, case the vibrations, whose frequencies were measured through the apparatus, associated to the various positions where the grain is found in plants, have been adapted to a number of mechanical devices which, with the “LabVIEW” interface software, executed qualitatively and comparatively evaluated oscillations and comparatively in an experiential approach. This allowed the discovery of optimal values for the operating parameters of the harvesters and other equipment involved. Therefore, the vibrations of the experiment that provided the best conditions for the collection were the frequency from 38 to 88 Hz, which reduced efforts to harvest the fruits of better quality and enabled the analysis of the natural conditions of plant oscillation.
URI: http://repositorio.ufla.br/jspui/handle/1/15622
Appears in Collections:Engenharia Agrícola - Doutorado (Teses)

Files in This Item:
File Description SizeFormat 
TESE_Avaliação do desprendimento do fruto do cafeeiro por vibração....pdf2,77 MBAdobe PDFView/Open


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.