MONITORING MOISTURE CONTENT IN Pinus elliottii Engelm. AND Eucalyptus grandis W. Hill ex Maiden WOODS, UNDER DIFFERENT DRYING TEMPERATURES, THROUGH THE ULTRASOUND
Autor(a) principal: | |
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Data de Publicação: | 2007 |
Outros Autores: | , , , , , , |
Tipo de documento: | Artigo |
Idioma: | por |
Título da fonte: | Ciência Florestal (Online) |
Texto Completo: | https://periodicos.ufsm.br/cienciaflorestal/article/view/1971 |
Resumo: | With the purpose of evaluating the viability of use of ultrasonic technique to estimate the wood moisture content during the drying process, samples of Pinus elliottii Engelm. and Eucalyptus grandis W. Hill ex Maiden with dimensions of 3.5 cm thick, 10 cm width and 25 cm long were submitted to drying temperatures of 20, 40 and 70ºC. A PUNDIT ultrasonic equipment with plane face transducers by 50 KHz was used to measure sound velocity in the longitudinal direction of the wood. Results indicated increase of estimated ultrasonic speed with reduction of moisture content. This relationship showed to be valid for the wood from green to the end of the drying process, and the best determination coefficients were found in the eucalypt wood (R² = 81%). Although no influence of the species in the ultrasonic speed has been observed, this one was influenced by the wood specific gravity and by the drying temperature. The effect of the specific mass was directly proportional for the pinus wood. Opposite effect was observed in eucalypt wood. The ultrasonic speed tended to decrease as drying temperature increased for both species. Results suggest that this method presents good potential for the control of the drying process. |
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MONITORING MOISTURE CONTENT IN Pinus elliottii Engelm. AND Eucalyptus grandis W. Hill ex Maiden WOODS, UNDER DIFFERENT DRYING TEMPERATURES, THROUGH THE ULTRASOUNDMonitoramento do teor de umidade de madeiras de Pinus elliottii Engelm. e Eucalyptus grandis W. Hill ex Maiden, sob diferentes temperaturas de secagem, através do ultra-som.wood dryingultrasonic wavesdrying controldrying temperature.secagem da madeiraondas ultra-sônicascontrole de secagemtemperatura de secagemWith the purpose of evaluating the viability of use of ultrasonic technique to estimate the wood moisture content during the drying process, samples of Pinus elliottii Engelm. and Eucalyptus grandis W. Hill ex Maiden with dimensions of 3.5 cm thick, 10 cm width and 25 cm long were submitted to drying temperatures of 20, 40 and 70ºC. A PUNDIT ultrasonic equipment with plane face transducers by 50 KHz was used to measure sound velocity in the longitudinal direction of the wood. Results indicated increase of estimated ultrasonic speed with reduction of moisture content. This relationship showed to be valid for the wood from green to the end of the drying process, and the best determination coefficients were found in the eucalypt wood (R² = 81%). Although no influence of the species in the ultrasonic speed has been observed, this one was influenced by the wood specific gravity and by the drying temperature. The effect of the specific mass was directly proportional for the pinus wood. Opposite effect was observed in eucalypt wood. The ultrasonic speed tended to decrease as drying temperature increased for both species. Results suggest that this method presents good potential for the control of the drying process.Com o objetivo de avaliar a viabilidade de uso da técnica ultra-sônica para estimar o teor de umidade da madeira durante o processo de secagem, amostras de Pinus elliottii Engelm. e Eucalyptus grandis W. Hill ex Maiden, com dimensões nominais 3,5 x 10 x 25 cm de espessura, largura e comprimento, respectivamente, foram submetidas às temperaturas de 20, 40 e 70ºC. Um equipamento ultra-sônico PUNDIT com transdutores de faces planas de 50 kHz foi utilizado para medir a velocidade de propagação do som na direção longitudinal da madeira. Os resultados indicaram aumento da velocidade ultra-sônica estimada em função da redução do teor de umidade. Essa relação mostrou-se válida no intervalo desde verde até o final da secagem, sendo que os melhores coeficientes de determinação ocorreram na madeira de eucalipto (R² = 81%). Embora não tenha sido observada uma influência da espécie na velocidade ultra-sônica, esta foi influenciada pela massa específica da madeira e pela temperatura de secagem. O efeito da massa específica foi diretamente proporcional para a madeira de pinus e inversamente proporcional para a madeira de eucalipto. A velocidade ultra-sônica apresentou tendência de redução com o aumento da temperatura de secagem para ambas as espécies, e os resultados obtidos sugerem que o método ultra-sônico apresenta bom potencial para o controle do processo de secagem.Universidade Federal de Santa Maria2007-12-30info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://periodicos.ufsm.br/cienciaflorestal/article/view/197110.5902/198050981971Ciência Florestal; Vol. 17 No. 4 (2007); 399-408Ciência Florestal; v. 17 n. 4 (2007); 399-4081980-50980103-9954reponame:Ciência Florestal (Online)instname:Universidade Federal de Santa Maria (UFSM)instacron:UFSMporhttps://periodicos.ufsm.br/cienciaflorestal/article/view/1971/1225Calegari, LeandroStangerlin, Diego MartinsSantini, Elio JoséHaselein, Clovis RobertoLonghi, Solon JonasCarmo, Paulo Inácio Obregon doFilho, Luiz Carlos Pinto da SilvaGatto, Darci Albertoinfo:eu-repo/semantics/openAccess2017-05-11T19:14:55Zoai:ojs.pkp.sfu.ca:article/1971Revistahttp://www.ufsm.br/cienciaflorestal/ONGhttps://old.scielo.br/oai/scielo-oai.php||cienciaflorestal@ufsm.br|| cienciaflorestal@gmail.com|| cf@smail.ufsm.br1980-50980103-9954opendoar:2017-05-11T19:14:55Ciência Florestal (Online) - Universidade Federal de Santa Maria (UFSM)false |
dc.title.none.fl_str_mv |
MONITORING MOISTURE CONTENT IN Pinus elliottii Engelm. AND Eucalyptus grandis W. Hill ex Maiden WOODS, UNDER DIFFERENT DRYING TEMPERATURES, THROUGH THE ULTRASOUND Monitoramento do teor de umidade de madeiras de Pinus elliottii Engelm. e Eucalyptus grandis W. Hill ex Maiden, sob diferentes temperaturas de secagem, através do ultra-som. |
title |
MONITORING MOISTURE CONTENT IN Pinus elliottii Engelm. AND Eucalyptus grandis W. Hill ex Maiden WOODS, UNDER DIFFERENT DRYING TEMPERATURES, THROUGH THE ULTRASOUND |
spellingShingle |
MONITORING MOISTURE CONTENT IN Pinus elliottii Engelm. AND Eucalyptus grandis W. Hill ex Maiden WOODS, UNDER DIFFERENT DRYING TEMPERATURES, THROUGH THE ULTRASOUND Calegari, Leandro wood drying ultrasonic waves drying control drying temperature. secagem da madeira ondas ultra-sônicas controle de secagem temperatura de secagem |
title_short |
MONITORING MOISTURE CONTENT IN Pinus elliottii Engelm. AND Eucalyptus grandis W. Hill ex Maiden WOODS, UNDER DIFFERENT DRYING TEMPERATURES, THROUGH THE ULTRASOUND |
title_full |
MONITORING MOISTURE CONTENT IN Pinus elliottii Engelm. AND Eucalyptus grandis W. Hill ex Maiden WOODS, UNDER DIFFERENT DRYING TEMPERATURES, THROUGH THE ULTRASOUND |
title_fullStr |
MONITORING MOISTURE CONTENT IN Pinus elliottii Engelm. AND Eucalyptus grandis W. Hill ex Maiden WOODS, UNDER DIFFERENT DRYING TEMPERATURES, THROUGH THE ULTRASOUND |
title_full_unstemmed |
MONITORING MOISTURE CONTENT IN Pinus elliottii Engelm. AND Eucalyptus grandis W. Hill ex Maiden WOODS, UNDER DIFFERENT DRYING TEMPERATURES, THROUGH THE ULTRASOUND |
title_sort |
MONITORING MOISTURE CONTENT IN Pinus elliottii Engelm. AND Eucalyptus grandis W. Hill ex Maiden WOODS, UNDER DIFFERENT DRYING TEMPERATURES, THROUGH THE ULTRASOUND |
author |
Calegari, Leandro |
author_facet |
Calegari, Leandro Stangerlin, Diego Martins Santini, Elio José Haselein, Clovis Roberto Longhi, Solon Jonas Carmo, Paulo Inácio Obregon do Filho, Luiz Carlos Pinto da Silva Gatto, Darci Alberto |
author_role |
author |
author2 |
Stangerlin, Diego Martins Santini, Elio José Haselein, Clovis Roberto Longhi, Solon Jonas Carmo, Paulo Inácio Obregon do Filho, Luiz Carlos Pinto da Silva Gatto, Darci Alberto |
author2_role |
author author author author author author author |
dc.contributor.author.fl_str_mv |
Calegari, Leandro Stangerlin, Diego Martins Santini, Elio José Haselein, Clovis Roberto Longhi, Solon Jonas Carmo, Paulo Inácio Obregon do Filho, Luiz Carlos Pinto da Silva Gatto, Darci Alberto |
dc.subject.por.fl_str_mv |
wood drying ultrasonic waves drying control drying temperature. secagem da madeira ondas ultra-sônicas controle de secagem temperatura de secagem |
topic |
wood drying ultrasonic waves drying control drying temperature. secagem da madeira ondas ultra-sônicas controle de secagem temperatura de secagem |
description |
With the purpose of evaluating the viability of use of ultrasonic technique to estimate the wood moisture content during the drying process, samples of Pinus elliottii Engelm. and Eucalyptus grandis W. Hill ex Maiden with dimensions of 3.5 cm thick, 10 cm width and 25 cm long were submitted to drying temperatures of 20, 40 and 70ºC. A PUNDIT ultrasonic equipment with plane face transducers by 50 KHz was used to measure sound velocity in the longitudinal direction of the wood. Results indicated increase of estimated ultrasonic speed with reduction of moisture content. This relationship showed to be valid for the wood from green to the end of the drying process, and the best determination coefficients were found in the eucalypt wood (R² = 81%). Although no influence of the species in the ultrasonic speed has been observed, this one was influenced by the wood specific gravity and by the drying temperature. The effect of the specific mass was directly proportional for the pinus wood. Opposite effect was observed in eucalypt wood. The ultrasonic speed tended to decrease as drying temperature increased for both species. Results suggest that this method presents good potential for the control of the drying process. |
publishDate |
2007 |
dc.date.none.fl_str_mv |
2007-12-30 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
https://periodicos.ufsm.br/cienciaflorestal/article/view/1971 10.5902/198050981971 |
url |
https://periodicos.ufsm.br/cienciaflorestal/article/view/1971 |
identifier_str_mv |
10.5902/198050981971 |
dc.language.iso.fl_str_mv |
por |
language |
por |
dc.relation.none.fl_str_mv |
https://periodicos.ufsm.br/cienciaflorestal/article/view/1971/1225 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
Universidade Federal de Santa Maria |
publisher.none.fl_str_mv |
Universidade Federal de Santa Maria |
dc.source.none.fl_str_mv |
Ciência Florestal; Vol. 17 No. 4 (2007); 399-408 Ciência Florestal; v. 17 n. 4 (2007); 399-408 1980-5098 0103-9954 reponame:Ciência Florestal (Online) instname:Universidade Federal de Santa Maria (UFSM) instacron:UFSM |
instname_str |
Universidade Federal de Santa Maria (UFSM) |
instacron_str |
UFSM |
institution |
UFSM |
reponame_str |
Ciência Florestal (Online) |
collection |
Ciência Florestal (Online) |
repository.name.fl_str_mv |
Ciência Florestal (Online) - Universidade Federal de Santa Maria (UFSM) |
repository.mail.fl_str_mv |
||cienciaflorestal@ufsm.br|| cienciaflorestal@gmail.com|| cf@smail.ufsm.br |
_version_ |
1799944127162351616 |