Performance evaluation of injection metering systems
Autor(a) principal: | |
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Data de Publicação: | 2002 |
Outros Autores: | , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1590/S1415-43662002000100028 http://hdl.handle.net/11449/211625 |
Resumo: | A method for measuring the performance of agricultural injection metering systems was developed and used to assess the characteristics of three commercial system designs. Steady-state characteristics were measured using both colored dyes and salt as tracers. Dynamic response characteristics were determined by measuring salt concentration downstream of the injection point by monitoring electrical conductivity of the spray solution. Salt added to a viscous test liquid changed viscosity slightly only at low shear rates and it is concluded that this liquid is appropriate for use in evaluation tests with injection systems. Results from tests with 2 systems specifically designed for operation with agricultural sprayers gave a linear response with both water and the viscous test liquids and no evidence of dose pulsation in the delivered spray liquid. A system using a single-acting water driven piston had a performance that was dependent upon viscosity and that gave substantial dose pulsation. When injecting on the pressure side of the pump, response times for both increasing and decreasing dose levels were in the order of 3.2 s. When injecting on the input side of the pump, response times were greater and very dependant upon the total flow rate of the delivery system. |
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Performance evaluation of injection metering systemsAvaliação do desempenho de sistemas de injeção de defensivosprecision agriculturesprayerspesticidesagricultura de precisãopulverizadoresdefensivosA method for measuring the performance of agricultural injection metering systems was developed and used to assess the characteristics of three commercial system designs. Steady-state characteristics were measured using both colored dyes and salt as tracers. Dynamic response characteristics were determined by measuring salt concentration downstream of the injection point by monitoring electrical conductivity of the spray solution. Salt added to a viscous test liquid changed viscosity slightly only at low shear rates and it is concluded that this liquid is appropriate for use in evaluation tests with injection systems. Results from tests with 2 systems specifically designed for operation with agricultural sprayers gave a linear response with both water and the viscous test liquids and no evidence of dose pulsation in the delivered spray liquid. A system using a single-acting water driven piston had a performance that was dependent upon viscosity and that gave substantial dose pulsation. When injecting on the pressure side of the pump, response times for both increasing and decreasing dose levels were in the order of 3.2 s. When injecting on the input side of the pump, response times were greater and very dependant upon the total flow rate of the delivery system.Um método para se medir o desempenho de sistemas de injeção de defensivos foi desenvolvido e usado para se avaliar as características de três sistemas disponíveis no mercado. A manutenção de doses constantes foi avaliada utilizando-se corantes e sais como traçantes. A resposta dinâmica a mudanças de dose foi determinada através da medição da concentração de sal na calda após o ponto de injeção, através do monitoramento da condutividade elétrica da solução. A adição de sal em uma solução viscosa-padrão teve pouca influência em sua viscosidade, concluindo-se que o líquido é apropriado para testes com sistemas de injeção de defensivos. Resultados de testes com dois sistemas projetados especificamente para uso em pulverizadores agrícolas, mostraram resposta linear para soluções em água e no líquido viscoso, sem apresentar pulsação da dose aplicada. Um sistema baseado em bomba de simples ação acionada por fluxo de água teve seu desempenho dependente da viscosidade, além de apresentar grande pulsação da dose. Quando a injeção foi realizada na linha de pressão da bomba do pulverizador, o tempo de resposta para acréscimo ou decréscimo de dose foi da ordem de 3,2 s e, quando foi realizada na linha de sucção da bomba, o tempo de resposta foi maior e muito dependente do fluxo total de calda do pulverizador.Chemical Application, Silsoe Research InstituteSilsoe Research InstituteUniversidade Estadual Paulista, FCAUniversidade Estadual Paulista, FCADepartamento de Engenharia Agrícola - UFCGChemical Application, Silsoe Research InstituteSilsoe Research InstituteUniversidade Estadual Paulista (Unesp)Antuniassi, Ulisses R. [UNESP]Miller, PaulPaice, Mark2021-07-14T10:27:10Z2021-07-14T10:27:10Z2002-04info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article159-165application/pdfhttp://dx.doi.org/10.1590/S1415-43662002000100028Revista Brasileira de Engenharia Agrícola e Ambiental. Campina Grande, PB, Brazil: Departamento de Engenharia Agrícola - UFCG, v. 6, n. 1, p. 159-165, 2002.1415-43661807-1929http://hdl.handle.net/11449/21162510.1590/S1415-43662002000100028S1415-43662002000100028S1415-43662002000100028.pdfSciELOreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengRevista Brasileira de Engenharia Agrícola e Ambientalinfo:eu-repo/semantics/openAccess2023-12-28T06:19:05Zoai:repositorio.unesp.br:11449/211625Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462023-12-28T06:19:05Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Performance evaluation of injection metering systems Avaliação do desempenho de sistemas de injeção de defensivos |
title |
Performance evaluation of injection metering systems |
spellingShingle |
Performance evaluation of injection metering systems Antuniassi, Ulisses R. [UNESP] precision agriculture sprayers pesticides agricultura de precisão pulverizadores defensivos |
title_short |
Performance evaluation of injection metering systems |
title_full |
Performance evaluation of injection metering systems |
title_fullStr |
Performance evaluation of injection metering systems |
title_full_unstemmed |
Performance evaluation of injection metering systems |
title_sort |
Performance evaluation of injection metering systems |
author |
Antuniassi, Ulisses R. [UNESP] |
author_facet |
Antuniassi, Ulisses R. [UNESP] Miller, Paul Paice, Mark |
author_role |
author |
author2 |
Miller, Paul Paice, Mark |
author2_role |
author author |
dc.contributor.none.fl_str_mv |
Chemical Application, Silsoe Research Institute Silsoe Research Institute Universidade Estadual Paulista (Unesp) |
dc.contributor.author.fl_str_mv |
Antuniassi, Ulisses R. [UNESP] Miller, Paul Paice, Mark |
dc.subject.por.fl_str_mv |
precision agriculture sprayers pesticides agricultura de precisão pulverizadores defensivos |
topic |
precision agriculture sprayers pesticides agricultura de precisão pulverizadores defensivos |
description |
A method for measuring the performance of agricultural injection metering systems was developed and used to assess the characteristics of three commercial system designs. Steady-state characteristics were measured using both colored dyes and salt as tracers. Dynamic response characteristics were determined by measuring salt concentration downstream of the injection point by monitoring electrical conductivity of the spray solution. Salt added to a viscous test liquid changed viscosity slightly only at low shear rates and it is concluded that this liquid is appropriate for use in evaluation tests with injection systems. Results from tests with 2 systems specifically designed for operation with agricultural sprayers gave a linear response with both water and the viscous test liquids and no evidence of dose pulsation in the delivered spray liquid. A system using a single-acting water driven piston had a performance that was dependent upon viscosity and that gave substantial dose pulsation. When injecting on the pressure side of the pump, response times for both increasing and decreasing dose levels were in the order of 3.2 s. When injecting on the input side of the pump, response times were greater and very dependant upon the total flow rate of the delivery system. |
publishDate |
2002 |
dc.date.none.fl_str_mv |
2002-04 2021-07-14T10:27:10Z 2021-07-14T10:27:10Z |
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 |
http://dx.doi.org/10.1590/S1415-43662002000100028 Revista Brasileira de Engenharia Agrícola e Ambiental. Campina Grande, PB, Brazil: Departamento de Engenharia Agrícola - UFCG, v. 6, n. 1, p. 159-165, 2002. 1415-4366 1807-1929 http://hdl.handle.net/11449/211625 10.1590/S1415-43662002000100028 S1415-43662002000100028 S1415-43662002000100028.pdf |
url |
http://dx.doi.org/10.1590/S1415-43662002000100028 http://hdl.handle.net/11449/211625 |
identifier_str_mv |
Revista Brasileira de Engenharia Agrícola e Ambiental. Campina Grande, PB, Brazil: Departamento de Engenharia Agrícola - UFCG, v. 6, n. 1, p. 159-165, 2002. 1415-4366 1807-1929 10.1590/S1415-43662002000100028 S1415-43662002000100028 S1415-43662002000100028.pdf |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Revista Brasileira de Engenharia Agrícola e Ambiental |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
159-165 application/pdf |
dc.publisher.none.fl_str_mv |
Departamento de Engenharia Agrícola - UFCG |
publisher.none.fl_str_mv |
Departamento de Engenharia Agrícola - UFCG |
dc.source.none.fl_str_mv |
SciELO reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
|
_version_ |
1797790133582299136 |