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DC Field | Value | Language |
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dc.contributor.author | Antuniassi, Ulisses Rocha | - |
dc.contributor.author | Figueiredo, Z. N. | - |
dc.contributor.author | de Carvalho, WPA | - |
dc.contributor.author | Pinto, D. R. | - |
dc.date.accessioned | 2014-05-20T13:19:19Z | - |
dc.date.available | 2014-05-20T13:19:19Z | - |
dc.date.issued | 2001-01-01 | - |
dc.identifier.citation | Proceedings of the World Congress of Computers In Agriculture and Natural Resources. St Joseph: Amer Soc Agr Engineers, p. 272-278, 2001. | - |
dc.identifier.uri | http://hdl.handle.net/11449/5043 | - |
dc.description.abstract | The aim of this study was to develop a laboratory method for time response evaluation on electronically controlled spray equipment using Programmable Logic Controllers (PLCs). For that purpose, a PLC controlled digital drive inverter was set up to drive an asynchronous electric motor linked to a centrifugal pump on a experimental sprayer equipped with electronic flow control. The PLC was operated via RS232 serial communication from a PC computer. A user program was written to control de motor by adjusting the following system variables, all related to the motor speed: time stopped; ramp up and ramp down times, time running at a given constant speed and ramp down time to stop the motor. This set up was used in conjunction with a data acquisition system to perform laboratory tests with an electronically controlled sprayer. Time response for pressure stabilization was measured while changing the pump speed by +/-20%. The results showed that for a 0.2 s ramp time increasing the motor speed, as an example, an AgLogix Flow Control system (Midwest Technologies Inc.) took 22 s in average to readjust the pressure. When decreasing the motor speed, this time response was down to 8 s. General results also showed that this kind of methodology could make easier the definition of standards for tests on electronically controlled application equipment. | en |
dc.format.extent | 272-278 | - |
dc.language.iso | eng | - |
dc.publisher | Amer Soc Agr Engineers | - |
dc.source | Web of Science | - |
dc.subject | precision agriculture | pt |
dc.subject | instrumentation and control | pt |
dc.subject | equipment automation | pt |
dc.title | Performance evaluation on electronic control systemsfor field sprayers using programmable logic controllers | en |
dc.type | outro | - |
dc.contributor.institution | Universidade Estadual Paulista (UNESP) | - |
dc.description.affiliation | Univ Estadual Paulista Julio Mesquita Filho, Rural Engn Dept, BR-18603970 Botucatu, SP, Brazil | - |
dc.description.affiliationUnesp | Univ Estadual Paulista Julio Mesquita Filho, Rural Engn Dept, BR-18603970 Botucatu, SP, Brazil | - |
dc.identifier.wos | WOS:000185357400039 | - |
dc.rights.accessRights | Acesso restrito | - |
dc.relation.ispartof | Proceedings of the World Congress of Computers In Agriculture and Natural Resources | - |
Appears in Collections: | Artigos, TCCs, Teses e Dissertações da Unesp |
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