Stepping motor driven constant-shear-rate rotating viscometer

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dc.contributor.authorDe Lucena, Samuel E.
dc.contributor.authorKaiser, Walter
dc.contributor.institutionUniversidade de São Paulo (USP)
dc.date.accessioned2022-04-29T08:43:43Z
dc.date.available2022-04-29T08:43:43Z
dc.date.issued2004-10-08
dc.description.abstractDespite the frequent use of stepping motors in robotics, automation and in a variety of precision instruments, they can hardly be found in rotational viscometers. This paper proposes the use of a stepping motor to drive conventional constant-shear-rate laboratory rotational viscometer, in order to avoid the use of velocity sensor and gearbox and, thus, simplify the instrument design. To investigate this driving technique, a commercial rotating viscometer has been adapted to be driven by a stepping motor, which is controlled via PC. Special circuitry has been added in order to microstep the stepping motor at a selectable step size, and to condition the torque signal. Tests have been carried out using the prototype to produce three flow curves for a standard Newtonian fluid (920 mPa.s at 25°C) but employing a different microstep size for each of them, within the shear rate range from 50 s-1 to 500 s-1. The results indicate the feasibility of the proposed driving technique.en
dc.description.affiliationDepartment of Electrical Engineering State University of São Paulo, av. Ariberto Cunha, 333, Guaratinguetá, 12516-410, SP
dc.description.affiliationDept. of Elec. Energy Engineering University of São Paulo, travessa 3, 158, São Paulo, 05508-900, SP
dc.format.extent1373-1377
dc.identifier.citationConference Record - IEEE Instrumentation and Measurement Technology Conference, v. 2, p. 1373-1377.
dc.identifier.issn1091-5281
dc.identifier.scopus2-s2.0-4644247970
dc.identifier.urihttp://hdl.handle.net/11449/231112
dc.language.isoeng
dc.relation.isnodouble39862*
dc.relation.ispartofConference Record - IEEE Instrumentation and Measurement Technology Conference
dc.sourceScopus
dc.subjectComputer-based instrumentation
dc.subjectLaboratory viscometer
dc.subjectMicrostepping
dc.subjectRotational viscometer
dc.subjectStepping motor
dc.subjectViscometer
dc.subjectViscometer design
dc.subjectViscosity measurement
dc.titleStepping motor driven constant-shear-rate rotating viscometeren
dc.typeTrabalho apresentado em evento

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