Please use this identifier to cite or link to this item: http://hdl.handle.net/1822/42507

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dc.contributor.authorPinto, J. G.por
dc.contributor.authorMonteiro, João L.por
dc.contributor.authorVasconcelos, Rosapor
dc.contributor.authorSoares, Filomenapor
dc.date.accessioned2016-09-09T08:51:55Z-
dc.date.available2016-09-09T08:51:55Z-
dc.date.issued2002-
dc.identifier.isbn0780376579por
dc.identifier.urihttp://hdl.handle.net/1822/42507-
dc.description.abstractIn Textile production, measurement of the yarn mass in 1mm range is utmost importance to properly evaluate the evenness, as several irregularities occur in 1 to 4mm yarn length. Until present, measurements in 1mm range are still not directly performed. In this paper we present a direct mass measurement in 1mm range based on capacitive sensors and signal processing techniques. The results point out that the evaluation of yarn mass, with this approach, is feasible in the 1mm range. The new approach allows on-line measurement (1mm yarn mass) in a spinning frame for real-time control. Several Digital Signal Processing techniques are used to improve the results. A value of capacity variation is close to 2,08E-17 F for a 57 tex (0,057 g/m) yarn. It is possible, with this equipment, to detect small variations but signal to noise ratio (SNR) is still low. With the current electronic conditioning it is possible to detect these variation in spite it is in microvolt range. As a spin-off the developed sensor is being used in knitting machines to control the yarn break and bobbin end.por
dc.language.isoengpor
dc.publisherIEEEpor
dc.relationPRAXIS XXI and POSI/P/EEI/13189/98por
dc.rightsopenAccesspor
dc.subjectYarn evennesspor
dc.subjectCapacitive sensorpor
dc.subjectSignal processingpor
dc.titleA new system for direct measurement of yarn mass with 1 mm. accuracypor
dc.typeconferencePaperpor
dc.peerreviewedyespor
sdum.publicationstatusinfo:eu-repo/semantics/publishedVersionpor
sdum.event.titleIEEE ICIT'02-
oaire.citationStartPage1158por
oaire.citationEndPage1163por
oaire.citationTitleIEEE ICIT'02por
dc.identifier.doi10.1109/ICIT.2002.1189336por
dc.subject.fosEngenharia e Tecnologia::Engenharia dos Materiaispor
dc.subject.wosScience & Technologypor
sdum.bookTitleIEEE ICIT' 02: 2002 IEEE INTERNATIONAL CONFERENCE ON INDUSTRIAL TECHNOLOGY, VOLS I AND II, PROCEEDINGSpor
Appears in Collections:DET/2C2T - Artigos em revistas internacionais com arbitragem científica

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