ETDs @PUC-Rio
| Título: | CALIBRATION METHODOLOGY OF AN INDUCTIVE PROXIMITY SENSOR FOR OSCILLATION MEASUREMENT IN HYDROELECTRIC GENERATORS | ||||||||||||||||||||||||||||||||||||
| Autor: |
DENIZE AZEVEDO DA SILVA |
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| Colaborador(es): |
ALCIR DE FARO ORLANDO - Orientador |
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| Catalogação: | 16/MAR/2007 | Língua(s): | PORTUGUESE - BRAZIL |
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| Tipo: | TEXT | Subtipo: | THESIS | ||||||||||||||||||||||||||||||||||
| Notas: |
[pt] Todos os dados constantes dos documentos são de inteira responsabilidade de seus autores. Os dados utilizados nas descrições dos documentos estão em conformidade com os sistemas da administração da PUC-Rio. [en] All data contained in the documents are the sole responsibility of the authors. The data used in the descriptions of the documents are in conformity with the systems of the administration of PUC-Rio. |
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| Referência(s): |
[pt] https://www.maxwell.vrac.puc-rio.br/projetosEspeciais/ETDs/consultas/conteudo.php?strSecao=resultado&nrSeq=9679&idi=1 [en] https://www.maxwell.vrac.puc-rio.br/projetosEspeciais/ETDs/consultas/conteudo.php?strSecao=resultado&nrSeq=9679&idi=2 |
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| DOI: | https://doi.org/10.17771/PUCRio.acad.9679 | ||||||||||||||||||||||||||||||||||||
| Resumo: | |||||||||||||||||||||||||||||||||||||
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This work presents the results of the behavior of the
inductive proximity sensor at
the measurement of oscillation in hydroelectric generators
from the generation
system of Furnas Centrais Elétricas S.A.. To develop this
study, two (2) inductive
proximity sensors were used. The methodology consisted of
calibrating statically
and dynamically the inductive proximity sensor. For this,
it was used a test mockup:
a system composed by an engine with variable speed and a
disc with variable
and controlled eccentricity connected to the axle. The
eccentricity of the test
mock-up was adjusted and thirteen (13) points were marked
on the disc, every
30°. The static calibration of the test mock-up has been
made, by measuring the
displacement in each one of these thirteen (13) points
with a calibrated dial
indicator. For the static calibration of the sensor, the
sensor itself was positioned
in front of the test mock-up disc at a known distance, the
axle was dislocated
manually for each one of the points and the output signal
of the sensor was
measured with a calibrated signal analyzer. The curve of
the static calibration then
was determined with the respective uncertainty of the
measurement. For the
dynamic calibration, the same system was run in the
nominal speeds of the
hydroelectric generators from Furnas Centrais Elétricas
S.A. (90 rpm, 120 rpm,
150 rpm and 180 rpm). The response of the sensor was then
compared at the
different rotations, being determined the attenuation of
the signal due to the
increase of the operation frequency. The static and
dynamic data were evaluated,
and the uncertainties determined. The static calibrations
carried through by the
procedure of FURNAS and by this work produced the same
results, considering
the range of measurement uncertainty. To reduce the
calibration uncertainty of the
FURNAS procedure, it is proposed that its results be
adjusted by a polynomial of
second degree. The dynamic calibration carried at several
frequencies showed that
there is no difference between the static and dynamic
values, even though the dynamic calibration has a more
elevated uncertainty. To simplify the calibration
of the sensors, it is proposed then that it is carried
statically only.
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