dc.creator | Johann A.L. | |
dc.creator | Russo E. | |
dc.creator | Cappelli N.L. | |
dc.creator | Umezu C.K. | |
dc.date | 2006 | |
dc.date | 2015-06-30T18:08:18Z | |
dc.date | 2015-11-26T14:24:38Z | |
dc.date | 2015-06-30T18:08:18Z | |
dc.date | 2015-11-26T14:24:38Z | |
dc.date.accessioned | 2018-03-28T21:26:55Z | |
dc.date.available | 2018-03-28T21:26:55Z | |
dc.identifier | | |
dc.identifier | Engenharia Agricola. , v. 26, n. 1, p. 142 - 150, 2006. | |
dc.identifier | 1006916 | |
dc.identifier | | |
dc.identifier | http://www.scopus.com/inward/record.url?eid=2-s2.0-33746847290&partnerID=40&md5=50479812f62d45588dd20ff54b6b7fe8 | |
dc.identifier | http://www.repositorio.unicamp.br/handle/REPOSIP/103226 | |
dc.identifier | http://repositorio.unicamp.br/jspui/handle/REPOSIP/103226 | |
dc.identifier | 2-s2.0-33746847290 | |
dc.identifier.uri | http://repositorioslatinoamericanos.uchile.cl/handle/2250/1245478 | |
dc.description | The present work aimed the development of a low cost servo-valve that answers to an electronic control signal, for variable rates liquid inputs application. A literature research to define which valve type should be used was made. A mechanically activated proportional valve with an electronically controlled servo-engine was designed and evaluated. Since developed the servo-valve, the system was submited to a number of tests .The evaluation of its behavior was obtained in terms of repeatability, hystheresis and linearity. The test was accomplished in a bench, specially developed for this aim. As a result, were obtained three curves of opening percentage as function of flow rate, describing three opening and closing increments in two different work pressures. The servo-valve presented a good repeatability, reasonable hysteresis and a typically quadratic curve. This one maintained the low cost target. These results were very satisfied because the non-linearity and the hysteresis could be easily corrected by software. | |
dc.description | 26 | |
dc.description | 1 | |
dc.description | 142 | |
dc.description | 150 | |
dc.description | Boareto, A.E., Cruz, A.P., Luz, P.H.C., (1991) Adubo Líquido: Produção e Uso No Brasil, 100p. , São Paulo: Fundação Cargill | |
dc.description | Fixen, P.E., Fluid fertilizers in an evolving agriculture (1994) Anais..., pp. 1-30. , SIMPÓSIO BRASILEIRO SOBRE FERTILIZANTES FLUÍDOS, 1993, Piracicaba. Piracicaba: Potafos | |
dc.description | Johann, A.L., Cappelli, N.L., Seleção e modelagem matemática de uma válvula dosadora a ser empregada na aplicação de fertilizantes líquidos a taxas variáveis (2003) Anais..., , WOKSHOP DE PÓSGRADUAÇÃO: O WORKSHOP DAS ÁREAS DE CONCENTRAÇÃO, 4., 2003, Campinas. Campinas: Faculdade de Engenharia Agrícola da UNICAMP, 1 CD-ROM | |
dc.description | Macintyre, A.J., (1997) Bombas e Instalações de Bombeamento. 2.Ed., 635p. , Rio de Janeiro: Livros Técnicos e Científicos | |
dc.description | Neto, B.B., Scarminio, I.S., Bruns, R.E., (2002) Como Fazer Experimentos: Pesquisa e Desenvolvimento Na Indústria. 2.Ed., 250p. , Campinas: Editora da UNICAMP | |
dc.description | (1964) Valves for the Control of Fluids, 344p. , Manchester: C. Nicholls & Company | |
dc.description | Umezu, C.K., (2003) Sistema de Controle de Um Equipamento de Formulação, Dosagem e Aplicação de Fertilizantes Sólidos a Taxas Variáveis, pp. 171f. , Tese (Doutorado em Máquinas Agrícolas) - Faculdade de Engenharia Agrícola, Universidade Estadual de Campinas, Campinas, 2003 | |
dc.language | pt | |
dc.publisher | | |
dc.relation | Engenharia Agricola | |
dc.rights | aberto | |
dc.source | Scopus | |
dc.title | Development And Evaluation Of A Low Cost Servo-valve For Liquid Inputs Application [desenvolvimento E Avaliação De Uma Servoválvula De Baixo Custo Para A Aplicação De Insumos Líquidos] | |
dc.type | Artículos de revistas | |