Título: | DEVELOPMENT OF A NEW BRIDGE OF MAXWELL-WIEN | ||||||||||||
Autor: |
ANDREIA QUINTANA LIMA DE SOUSA |
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Colaborador(es): |
EDUARDO JORGE PIRES PACHECO - Orientador ENDRE TOTH - Coorientador |
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Catalogação: | 21/NOV/2001 | 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=2130&idi=1 [en] https://www.maxwell.vrac.puc-rio.br/projetosEspeciais/ETDs/consultas/conteudo.php?strSecao=resultado&nrSeq=2130&idi=2 [es] https://www.maxwell.vrac.puc-rio.br/projetosEspeciais/ETDs/consultas/conteudo.php?strSecao=resultado&nrSeq=2130&idi=4 |
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DOI: | https://doi.org/10.17771/PUCRio.acad.2130 | ||||||||||||
Resumo: | |||||||||||||
In national institutes of metrology, for the high precision
measurement of inductance special circuits are used,
developed and constructed by the laboratories themselves.
This dissertation for a master degree describes the
development and realisation of a new Maxwell-Wien bridge
that is used for the standardisation and dissemination of
the unit of inductance in the National Institute of
Metrology, Standardization and Industrial Quality - INMETRO.
In the theoretical part of this work the concept of the
complex error is introduced and, using this generalised
method, the errors of measurement circuits as well as the
effects of internal and external stray impedance are
analysed. Methods of compensation to minimise these errors
are also treated. In the practical part of the
dissertation, starting from the characteristics of standard
inductors, the most known arrangements of Maxwell-Wien
bridges are studied. The innovative concepts to develop a
new bridge of non-traditional structure, the methods
applied and the realised construction are described in
details. The work is completed by a computer program to
evaluate measurement data, developed in language C, in the
environment of LabWindows/CVI, (C for Virtual
Instrumentation, product of National Instruments). The
results of systematic calibrations and that of
international comparisons are resumed, proving that, in
spite of simple solutions and methods, the new bridge is
offering high accuracy and repeatability, attaining the
performance of the bridges of primary laboratories.
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