Detachment efficiency of fruits from coffee plants subjected to mechanical vibrations

Detalhes bibliográficos
Autor(a) principal: Coelho, Andre Luiz de Freitas
Data de Publicação: 2015
Outros Autores: Santos, Fábio Lúcio, Pinto, Fransciso de Assis de Carvalho, Queiroz, Daniel Marçal de
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Pesquisa Agropecuária Tropical (Online)
Texto Completo: https://revistas.ufg.br/pat/article/view/36227
Resumo: The development of efficient machines for the mechanical harvesting of coffee plants requires the use of appropriate vibrational parameters. Thus, in order to detach less unripe fruits and decrease reharvesting, branch breakage and defoliation, it is important to choose the appropriate frequency, amplitude and vibration time. This study aimed at analyzing the detachment efficiency of fruits from coffee plants according to vibrational parameters and ripening stage. Fruit bunches were sampled at the green and mature stages and subjected to vibration, using a system composed by a signal generator, an amplifier and an electromagnetic vibrating machine. Tests combined different frequencies (16.4 Hz, 20.3 Hz, 24 Hz, 25.6 Hz, 30.0 Hz and 33.0 Hz), amplitudes (5.0 mm, 7.0 mm and 9.0 mm) and vibration times (10.0 s and 20.0 s). The vibration times did not affect the detachment efficiency. There was a trend for higher detachment efficiency in mature fruits than in green fruits. The detachment efficiency increased with increasing vibration frequency and amplitude.
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spelling Detachment efficiency of fruits from coffee plants subjected to mechanical vibrationsEficiência de derriça de frutos de cafeeiro submetido a vibrações mecânicasCoffea arabicavibrational parametersmechanical harvesting.Coffea arabicaparâmetros vibracionaiscolheita mecanizada.The development of efficient machines for the mechanical harvesting of coffee plants requires the use of appropriate vibrational parameters. Thus, in order to detach less unripe fruits and decrease reharvesting, branch breakage and defoliation, it is important to choose the appropriate frequency, amplitude and vibration time. This study aimed at analyzing the detachment efficiency of fruits from coffee plants according to vibrational parameters and ripening stage. Fruit bunches were sampled at the green and mature stages and subjected to vibration, using a system composed by a signal generator, an amplifier and an electromagnetic vibrating machine. Tests combined different frequencies (16.4 Hz, 20.3 Hz, 24 Hz, 25.6 Hz, 30.0 Hz and 33.0 Hz), amplitudes (5.0 mm, 7.0 mm and 9.0 mm) and vibration times (10.0 s and 20.0 s). The vibration times did not affect the detachment efficiency. There was a trend for higher detachment efficiency in mature fruits than in green fruits. The detachment efficiency increased with increasing vibration frequency and amplitude.O desenvolvimento de máquinas eficientes para a colheita mecanizada do cafeeiro exige a utilização de parâmetros vibracionais adequados. Assim, para um menor desprendimento de frutos verdes, repasse, quebra de galhos e desfolha, devem ser utilizados magnitudes de frequência, amplitude e tempo de vibração adequados. Objetivou-se analisar a eficiência de derriça de frutos de cafeeiro, em função de parâmetros vibracionais e estádio de maturação. Cachos de frutos foram amostrados nos estádios de maturação verde e cereja e submetidos à vibração, utilizando-se um sistema composto por um gerador de sinais, um amplificador e uma máquina vibratória eletromagnética. Os ensaios foram realizados combinando-se diferentes frequências (16,4 Hz; 20,3 Hz; 24 Hz; 25,6 Hz; 30,0 Hz; e 33,0 Hz), amplitudes (5,0 mm; 7,0 mm; e 9,0 mm) e tempos de vibração (10,0 s e 20,0 s). Os tempos de vibração empregados não influenciaram na eficiência de derriça. Houve tendência de a eficiência de derriça dos frutos cerejas ser superior à dos frutos verdes. A eficiência de derriça aumentou à medida que se aumentou a frequência e a amplitude de vibração.Escola de Agronomia - Universidade Federal de Goiás2015-12-16info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionAvaliado por paresapplication/pdfhttps://revistas.ufg.br/pat/article/view/36227Pesquisa Agropecuária Tropical [Agricultural Research in the Tropics]; v. 45, n. 4, Oct./Dec. 2015; 406-412Pesquisa Agropecuária Tropical (Agricultural Research in the Tropics); v. 45, n. 4, out./dez. 2015; 406-412Pesquisa Agropecuária Tropical; v. 45, n. 4, out./dez. 2015; 406-4121983-4063reponame:Pesquisa Agropecuária Tropical (Online)instname:Universidade Federal de Goiás (UFG)instacron:UFGenghttps://revistas.ufg.br/pat/article/view/36227/19696Copyright (c) 2020 Pesquisa Agropecuária Tropical (Agricultural Research in the Tropics)info:eu-repo/semantics/openAccessCoelho, Andre Luiz de FreitasSantos, Fábio LúcioPinto, Fransciso de Assis de CarvalhoQueiroz, Daniel Marçal de2020-07-13T16:34:19Zoai:ojs.revistas.ufg.br:article/36227Revistahttps://revistas.ufg.br/patPUBhttps://revistas.ufg.br/pat/oaiaseleguini.pat@gmail.com||mgoes@agro.ufg.br1983-40631517-6398opendoar:2024-05-21T19:56:09.245420Pesquisa Agropecuária Tropical (Online) - Universidade Federal de Goiás (UFG)true
dc.title.none.fl_str_mv Detachment efficiency of fruits from coffee plants subjected to mechanical vibrations
Eficiência de derriça de frutos de cafeeiro submetido a vibrações mecânicas
title Detachment efficiency of fruits from coffee plants subjected to mechanical vibrations
spellingShingle Detachment efficiency of fruits from coffee plants subjected to mechanical vibrations
Coelho, Andre Luiz de Freitas
Coffea arabica
vibrational parameters
mechanical harvesting.
Coffea arabica
parâmetros vibracionais
colheita mecanizada.
title_short Detachment efficiency of fruits from coffee plants subjected to mechanical vibrations
title_full Detachment efficiency of fruits from coffee plants subjected to mechanical vibrations
title_fullStr Detachment efficiency of fruits from coffee plants subjected to mechanical vibrations
title_full_unstemmed Detachment efficiency of fruits from coffee plants subjected to mechanical vibrations
title_sort Detachment efficiency of fruits from coffee plants subjected to mechanical vibrations
author Coelho, Andre Luiz de Freitas
author_facet Coelho, Andre Luiz de Freitas
Santos, Fábio Lúcio
Pinto, Fransciso de Assis de Carvalho
Queiroz, Daniel Marçal de
author_role author
author2 Santos, Fábio Lúcio
Pinto, Fransciso de Assis de Carvalho
Queiroz, Daniel Marçal de
author2_role author
author
author
dc.contributor.author.fl_str_mv Coelho, Andre Luiz de Freitas
Santos, Fábio Lúcio
Pinto, Fransciso de Assis de Carvalho
Queiroz, Daniel Marçal de
dc.subject.por.fl_str_mv Coffea arabica
vibrational parameters
mechanical harvesting.
Coffea arabica
parâmetros vibracionais
colheita mecanizada.
topic Coffea arabica
vibrational parameters
mechanical harvesting.
Coffea arabica
parâmetros vibracionais
colheita mecanizada.
description The development of efficient machines for the mechanical harvesting of coffee plants requires the use of appropriate vibrational parameters. Thus, in order to detach less unripe fruits and decrease reharvesting, branch breakage and defoliation, it is important to choose the appropriate frequency, amplitude and vibration time. This study aimed at analyzing the detachment efficiency of fruits from coffee plants according to vibrational parameters and ripening stage. Fruit bunches were sampled at the green and mature stages and subjected to vibration, using a system composed by a signal generator, an amplifier and an electromagnetic vibrating machine. Tests combined different frequencies (16.4 Hz, 20.3 Hz, 24 Hz, 25.6 Hz, 30.0 Hz and 33.0 Hz), amplitudes (5.0 mm, 7.0 mm and 9.0 mm) and vibration times (10.0 s and 20.0 s). The vibration times did not affect the detachment efficiency. There was a trend for higher detachment efficiency in mature fruits than in green fruits. The detachment efficiency increased with increasing vibration frequency and amplitude.
publishDate 2015
dc.date.none.fl_str_mv 2015-12-16
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Avaliado por pares
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv https://revistas.ufg.br/pat/article/view/36227
url https://revistas.ufg.br/pat/article/view/36227
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv https://revistas.ufg.br/pat/article/view/36227/19696
dc.rights.driver.fl_str_mv Copyright (c) 2020 Pesquisa Agropecuária Tropical (Agricultural Research in the Tropics)
info:eu-repo/semantics/openAccess
rights_invalid_str_mv Copyright (c) 2020 Pesquisa Agropecuária Tropical (Agricultural Research in the Tropics)
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Escola de Agronomia - Universidade Federal de Goiás
publisher.none.fl_str_mv Escola de Agronomia - Universidade Federal de Goiás
dc.source.none.fl_str_mv Pesquisa Agropecuária Tropical [Agricultural Research in the Tropics]; v. 45, n. 4, Oct./Dec. 2015; 406-412
Pesquisa Agropecuária Tropical (Agricultural Research in the Tropics); v. 45, n. 4, out./dez. 2015; 406-412
Pesquisa Agropecuária Tropical; v. 45, n. 4, out./dez. 2015; 406-412
1983-4063
reponame:Pesquisa Agropecuária Tropical (Online)
instname:Universidade Federal de Goiás (UFG)
instacron:UFG
instname_str Universidade Federal de Goiás (UFG)
instacron_str UFG
institution UFG
reponame_str Pesquisa Agropecuária Tropical (Online)
collection Pesquisa Agropecuária Tropical (Online)
repository.name.fl_str_mv Pesquisa Agropecuária Tropical (Online) - Universidade Federal de Goiás (UFG)
repository.mail.fl_str_mv aseleguini.pat@gmail.com||mgoes@agro.ufg.br
_version_ 1799874818958426112

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