Influence of the impact of a rigid rod on the coffee fruits detachment by mechanical vibrations
Autor(a) principal: | |
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Data de Publicação: | 2016 |
Outros Autores: | , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UFLA |
Texto Completo: | http://repositorio.ufla.br/jspui/handle/1/30280 |
Resumo: | Nowadays, the coffee sector has passed by a transition due the lack of labor, which makes manual harvesting impracticable. The mechanization has been the solution found by the coffee farmers to overcome the problem of lack of labor and also reduce the production costs. The principle used to perform coffee mechanical harvesting is based on mechanical vibrations. The aim of this study was to evaluate the detachment efficiency behavior of the coffee fruits under mechanical vibrations transmitted to the fruit-stem system by impact of a rigid rod, and mechanical vibrations transmitted to the system without the impact. Trials to evaluate the fruits detachment were performed varying the vibration frequency, the ripening stage of the fruits, the number of fruits at the same stem and the way of transmission of the mechanical vibrations to the fruit-stem system. The detachment efficiency of red fruits was higher than green fruits. It was observed an increase of the detachment efficiency associated to the increase the frequency of vibration. Detachment efficiency obtained from mechanical vibrations transmitted due the impact of a rigid rod on fruit-stem system was 19.4% higher than mechanical vibrations transmitted without impact. |
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Influence of the impact of a rigid rod on the coffee fruits detachment by mechanical vibrationsInfluência do impacto de uma haste rígida no destacamento de frutos de café por vibrações mecânicasCafeicultura - MecanizaçãoCafé - DerriçaVibrações mecânicasCoffee growing - MechanizationCoffee - DetachmentVibrações mecânicasNowadays, the coffee sector has passed by a transition due the lack of labor, which makes manual harvesting impracticable. The mechanization has been the solution found by the coffee farmers to overcome the problem of lack of labor and also reduce the production costs. The principle used to perform coffee mechanical harvesting is based on mechanical vibrations. The aim of this study was to evaluate the detachment efficiency behavior of the coffee fruits under mechanical vibrations transmitted to the fruit-stem system by impact of a rigid rod, and mechanical vibrations transmitted to the system without the impact. Trials to evaluate the fruits detachment were performed varying the vibration frequency, the ripening stage of the fruits, the number of fruits at the same stem and the way of transmission of the mechanical vibrations to the fruit-stem system. The detachment efficiency of red fruits was higher than green fruits. It was observed an increase of the detachment efficiency associated to the increase the frequency of vibration. Detachment efficiency obtained from mechanical vibrations transmitted due the impact of a rigid rod on fruit-stem system was 19.4% higher than mechanical vibrations transmitted without impact.Atualmente, a cafeicultura passa por um momento de transição acarretada pela dificuldade em conseguir mão de obra, o que torna a colheita manual inviável. A mecanização vem sendo a saída encontrada pelos produtores para reduzir seus custos de produção. Objetivou-se com este trabalho analisar o comportamento da eficiência de derriça dos frutos do café com a vibração sendo transmitida ao sistema frutopedúnculo com o impacto de uma haste rígida ao fruto, e vibração transmitida ao sistema fruto-pedúnculo sem impacto. Foram realizados ensaios de derriça variando a frequência de vibração, o estádio de maturação dos frutos, o número de frutos solidários ao mesmo pedúnculo e a forma de transmissão da vibração ao sistema fruto-pedúnculo. A eficiência de derriça dos frutos cerejas foi superior à dos frutos verdes. Observou-se o aumento da eficiência de derriça na medida em que se aumentou a frequência de vibração. Verificou-se também que a eficiência de derriça obtida com o modo de transmissão da vibração pelo impacto de uma haste rígida ao fruto foi 19,4% maior que com o modo de transmissão da vibração sem impacto ao fruto.Universidade Federal da Grande Dourados2018-08-30T17:11:21Z2018-08-30T17:11:21Z2016info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfGOMES, E. Q.; SANTOS, F. L.; JESUS, V. A. M. de. Influence of the impact of a rigid rod on the coffee fruits detachment by mechanical vibrations. Revista Agrarian, Dourados, v. 9, n. 32, p. 172-181, 2016.http://repositorio.ufla.br/jspui/handle/1/30280Revista Agrarianreponame:Repositório Institucional da UFLAinstname:Universidade Federal de Lavras (UFLA)instacron:UFLAAttribution-NonCommercial-ShareAlike 4.0 Internationalhttp://creativecommons.org/licenses/by-nc-sa/4.0/info:eu-repo/semantics/openAccessGomes, Ely QueirozSantos, Fábio LúcioJesus, Valquíria Aparecida Mendes deeng2018-08-30T17:11:22Zoai:localhost:1/30280Repositório InstitucionalPUBhttp://repositorio.ufla.br/oai/requestnivaldo@ufla.br || repositorio.biblioteca@ufla.bropendoar:2018-08-30T17:11:22Repositório Institucional da UFLA - Universidade Federal de Lavras (UFLA)false |
dc.title.none.fl_str_mv |
Influence of the impact of a rigid rod on the coffee fruits detachment by mechanical vibrations Influência do impacto de uma haste rígida no destacamento de frutos de café por vibrações mecânicas |
title |
Influence of the impact of a rigid rod on the coffee fruits detachment by mechanical vibrations |
spellingShingle |
Influence of the impact of a rigid rod on the coffee fruits detachment by mechanical vibrations Gomes, Ely Queiroz Cafeicultura - Mecanização Café - Derriça Vibrações mecânicas Coffee growing - Mechanization Coffee - Detachment Vibrações mecânicas |
title_short |
Influence of the impact of a rigid rod on the coffee fruits detachment by mechanical vibrations |
title_full |
Influence of the impact of a rigid rod on the coffee fruits detachment by mechanical vibrations |
title_fullStr |
Influence of the impact of a rigid rod on the coffee fruits detachment by mechanical vibrations |
title_full_unstemmed |
Influence of the impact of a rigid rod on the coffee fruits detachment by mechanical vibrations |
title_sort |
Influence of the impact of a rigid rod on the coffee fruits detachment by mechanical vibrations |
author |
Gomes, Ely Queiroz |
author_facet |
Gomes, Ely Queiroz Santos, Fábio Lúcio Jesus, Valquíria Aparecida Mendes de |
author_role |
author |
author2 |
Santos, Fábio Lúcio Jesus, Valquíria Aparecida Mendes de |
author2_role |
author author |
dc.contributor.author.fl_str_mv |
Gomes, Ely Queiroz Santos, Fábio Lúcio Jesus, Valquíria Aparecida Mendes de |
dc.subject.por.fl_str_mv |
Cafeicultura - Mecanização Café - Derriça Vibrações mecânicas Coffee growing - Mechanization Coffee - Detachment Vibrações mecânicas |
topic |
Cafeicultura - Mecanização Café - Derriça Vibrações mecânicas Coffee growing - Mechanization Coffee - Detachment Vibrações mecânicas |
description |
Nowadays, the coffee sector has passed by a transition due the lack of labor, which makes manual harvesting impracticable. The mechanization has been the solution found by the coffee farmers to overcome the problem of lack of labor and also reduce the production costs. The principle used to perform coffee mechanical harvesting is based on mechanical vibrations. The aim of this study was to evaluate the detachment efficiency behavior of the coffee fruits under mechanical vibrations transmitted to the fruit-stem system by impact of a rigid rod, and mechanical vibrations transmitted to the system without the impact. Trials to evaluate the fruits detachment were performed varying the vibration frequency, the ripening stage of the fruits, the number of fruits at the same stem and the way of transmission of the mechanical vibrations to the fruit-stem system. The detachment efficiency of red fruits was higher than green fruits. It was observed an increase of the detachment efficiency associated to the increase the frequency of vibration. Detachment efficiency obtained from mechanical vibrations transmitted due the impact of a rigid rod on fruit-stem system was 19.4% higher than mechanical vibrations transmitted without impact. |
publishDate |
2016 |
dc.date.none.fl_str_mv |
2016 2018-08-30T17:11:21Z 2018-08-30T17:11:21Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
GOMES, E. Q.; SANTOS, F. L.; JESUS, V. A. M. de. Influence of the impact of a rigid rod on the coffee fruits detachment by mechanical vibrations. Revista Agrarian, Dourados, v. 9, n. 32, p. 172-181, 2016. http://repositorio.ufla.br/jspui/handle/1/30280 |
identifier_str_mv |
GOMES, E. Q.; SANTOS, F. L.; JESUS, V. A. M. de. Influence of the impact of a rigid rod on the coffee fruits detachment by mechanical vibrations. Revista Agrarian, Dourados, v. 9, n. 32, p. 172-181, 2016. |
url |
http://repositorio.ufla.br/jspui/handle/1/30280 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.rights.driver.fl_str_mv |
Attribution-NonCommercial-ShareAlike 4.0 International http://creativecommons.org/licenses/by-nc-sa/4.0/ info:eu-repo/semantics/openAccess |
rights_invalid_str_mv |
Attribution-NonCommercial-ShareAlike 4.0 International http://creativecommons.org/licenses/by-nc-sa/4.0/ |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
Universidade Federal da Grande Dourados |
publisher.none.fl_str_mv |
Universidade Federal da Grande Dourados |
dc.source.none.fl_str_mv |
Revista Agrarian reponame:Repositório Institucional da UFLA instname:Universidade Federal de Lavras (UFLA) instacron:UFLA |
instname_str |
Universidade Federal de Lavras (UFLA) |
instacron_str |
UFLA |
institution |
UFLA |
reponame_str |
Repositório Institucional da UFLA |
collection |
Repositório Institucional da UFLA |
repository.name.fl_str_mv |
Repositório Institucional da UFLA - Universidade Federal de Lavras (UFLA) |
repository.mail.fl_str_mv |
nivaldo@ufla.br || repositorio.biblioteca@ufla.br |
_version_ |
1807835101639213056 |