Detachment efficiency of fruits from coffee plants subjected to mechanical vibrations
Autor(a) principal: | |
---|---|
Data de Publicação: | 2015 |
Outros Autores: | , , |
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. |
id |
UFG-6_089107f8202d8dd45ef26e1833fe86f3 |
---|---|
oai_identifier_str |
oai:ojs.revistas.ufg.br:article/36227 |
network_acronym_str |
UFG-6 |
network_name_str |
Pesquisa Agropecuária Tropical (Online) |
repository_id_str |
|
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 |