Operator Bias in the Estimation of Arc Efficiency in Gas Tungsten Arc Welding
Autor(a) principal: | |
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Data de Publicação: | 2015 |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Revista soldagem & inspeção (Online) |
Texto Completo: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0104-92242015000100128 |
Resumo: | In this paper the operator bias in the measurement process of arc efficiency in stationary direct current electrode negative gas tungsten arc welding is discussed. An experimental study involving 15 operators (enough to reach statistical significance) has been carried out with the purpose to estimate the arc efficiency from a specific procedure for calorimetric experiments. The measurement procedure consists of three manual operations which introduces operator bias in the measurement process. An additional relevant experiment highlights the consequences of estimating the arc voltage by measuring the potential between the terminals of the welding power source instead of measuring the potential between the electrode contact tube and the workpiece. The result of the study is a statistical evaluation of the operator bias influence on the estimate, showing that operator bias is negligible in the estimate considered here. On the contrary the consequences of neglecting welding leads voltage drop results in a significant under estimation of the arc efficiency. |
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Operator Bias in the Estimation of Arc Efficiency in Gas Tungsten Arc WeldingArc efficiencyGas tungsten arc weldingDirect current electrode negativeoperator biasIn this paper the operator bias in the measurement process of arc efficiency in stationary direct current electrode negative gas tungsten arc welding is discussed. An experimental study involving 15 operators (enough to reach statistical significance) has been carried out with the purpose to estimate the arc efficiency from a specific procedure for calorimetric experiments. The measurement procedure consists of three manual operations which introduces operator bias in the measurement process. An additional relevant experiment highlights the consequences of estimating the arc voltage by measuring the potential between the terminals of the welding power source instead of measuring the potential between the electrode contact tube and the workpiece. The result of the study is a statistical evaluation of the operator bias influence on the estimate, showing that operator bias is negligible in the estimate considered here. On the contrary the consequences of neglecting welding leads voltage drop results in a significant under estimation of the arc efficiency.Associação Brasileira de Soldagem2015-03-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0104-92242015000100128Soldagem & Inspeção v.20 n.1 2015reponame:Revista soldagem & inspeção (Online)instname:Associação Brasileira de Soldagem (ABS)instacron:ABS10.1590/0104-9224/SI2001.13info:eu-repo/semantics/openAccessSikström,Fredrikeng2015-07-08T00:00:00Zoai:scielo:S0104-92242015000100128Revistahttp://abs-soldagem.org.br/s&i/https://old.scielo.br/oai/scielo-oai.php||revista-si@abs-soldagem.org.br0104-92241980-6973opendoar:2015-07-08T00:00Revista soldagem & inspeção (Online) - Associação Brasileira de Soldagem (ABS)false |
dc.title.none.fl_str_mv |
Operator Bias in the Estimation of Arc Efficiency in Gas Tungsten Arc Welding |
title |
Operator Bias in the Estimation of Arc Efficiency in Gas Tungsten Arc Welding |
spellingShingle |
Operator Bias in the Estimation of Arc Efficiency in Gas Tungsten Arc Welding Sikström,Fredrik Arc efficiency Gas tungsten arc welding Direct current electrode negative operator bias |
title_short |
Operator Bias in the Estimation of Arc Efficiency in Gas Tungsten Arc Welding |
title_full |
Operator Bias in the Estimation of Arc Efficiency in Gas Tungsten Arc Welding |
title_fullStr |
Operator Bias in the Estimation of Arc Efficiency in Gas Tungsten Arc Welding |
title_full_unstemmed |
Operator Bias in the Estimation of Arc Efficiency in Gas Tungsten Arc Welding |
title_sort |
Operator Bias in the Estimation of Arc Efficiency in Gas Tungsten Arc Welding |
author |
Sikström,Fredrik |
author_facet |
Sikström,Fredrik |
author_role |
author |
dc.contributor.author.fl_str_mv |
Sikström,Fredrik |
dc.subject.por.fl_str_mv |
Arc efficiency Gas tungsten arc welding Direct current electrode negative operator bias |
topic |
Arc efficiency Gas tungsten arc welding Direct current electrode negative operator bias |
description |
In this paper the operator bias in the measurement process of arc efficiency in stationary direct current electrode negative gas tungsten arc welding is discussed. An experimental study involving 15 operators (enough to reach statistical significance) has been carried out with the purpose to estimate the arc efficiency from a specific procedure for calorimetric experiments. The measurement procedure consists of three manual operations which introduces operator bias in the measurement process. An additional relevant experiment highlights the consequences of estimating the arc voltage by measuring the potential between the terminals of the welding power source instead of measuring the potential between the electrode contact tube and the workpiece. The result of the study is a statistical evaluation of the operator bias influence on the estimate, showing that operator bias is negligible in the estimate considered here. On the contrary the consequences of neglecting welding leads voltage drop results in a significant under estimation of the arc efficiency. |
publishDate |
2015 |
dc.date.none.fl_str_mv |
2015-03-01 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0104-92242015000100128 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0104-92242015000100128 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1590/0104-9224/SI2001.13 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
text/html |
dc.publisher.none.fl_str_mv |
Associação Brasileira de Soldagem |
publisher.none.fl_str_mv |
Associação Brasileira de Soldagem |
dc.source.none.fl_str_mv |
Soldagem & Inspeção v.20 n.1 2015 reponame:Revista soldagem & inspeção (Online) instname:Associação Brasileira de Soldagem (ABS) instacron:ABS |
instname_str |
Associação Brasileira de Soldagem (ABS) |
instacron_str |
ABS |
institution |
ABS |
reponame_str |
Revista soldagem & inspeção (Online) |
collection |
Revista soldagem & inspeção (Online) |
repository.name.fl_str_mv |
Revista soldagem & inspeção (Online) - Associação Brasileira de Soldagem (ABS) |
repository.mail.fl_str_mv |
||revista-si@abs-soldagem.org.br |
_version_ |
1754213003477123072 |