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	Provedor de dados AGRIAMBI (2) Autor Almeida,Alexsandro C. S. (2) Botrel,Tarlei A. (2) Camargo,Antonio P. de (2) Pinto,Marinaldo F. (2) Raine,Steven R. (2) Salvador,Conan A. (2) Mais... Palavra-chave Automation (2) Irrigation scheduling (2) Tensiometer (2) Technological innovation (1) Tipo do documento Info:eu-repo/semantics/article (2) Ano 2017 (2) País Brazil (2) Idioma Inglês (2)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 2 Primeira ... 1 ... Última An irrigation controller mechanically actuated by soil-water tension: I - Design, development and laboratory evaluations AGRIAMBI Almeida,Alexsandro C. S.; Botrel,Tarlei A.; Raine,Steven R.; Camargo,Antonio P. de; Pinto,Marinaldo F.; Salvador,Conan A.. ABSTRACT The objective of this study was to develop and evaluate an irrigation controller that was mechanically actuated by soil-water tension within laboratory conditions. The controller was designed and constructed using readily available hydraulic fittings and other componentry. The main components of the controller were a tensiometer; a rubber diaphragm that moves according to the variation in tension inside of the tensiometer; an activation rod that transfers the movement from diaphragm to the switch valve; and a steel spring that regulates the activation of soil water tension. Six irrigation controller samples were tested in the laboratory to evaluate the mechanical performance and component forces required to activate the controllers. The... Tipo: Info:eu-repo/semantics/article Palavras-chave: Irrigation scheduling; Tensiometer; Automation. Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662017000600369 Irrigation controller mechanically actuated by soil-water tension: II - Field evaluations AGRIAMBI Almeida,Alexsandro C. S.; Botrel,Tarlei A.; Raine,Steven R.; Camargo,Antonio P. de; Pinto,Marinaldo F.; Salvador,Conan A.. ABSTRACT In this study, a field evaluation of the performance of an irrigation controller mechanically actuated by soil-water tension (SWT) was performed. The controller employs a tensiometer used as a sensor of SWT to directly control a mechanically actuated hydraulic valve. Six controllers were installed in an orchard to control the irrigation for six rows of plants over 64 days. Each controller controlled the irrigation of one lateral drip line. The drip irrigation system was gravity-fed from a water source placed 7 m above the soil surface. The SWT and the pressure in each lateral line were measured to evaluate the performance of the controllers. All the controllers tested in the field autonomously initiated and terminated the irrigation during the... Tipo: Info:eu-repo/semantics/article Palavras-chave: Irrigation scheduling; Technological innovation; Tensiometer; Automation. Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662017000500298 Registros recuperados: 2 Primeira ... 1 ... Última

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