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

TitleA new system for direct measurement of yarn mass with 1 mm. accuracy
Author(s)Pinto, J. G.
Monteiro, João L.
Vasconcelos, Rosa
Soares, Filomena
KeywordsYarn evenness
Capacitive sensor
Signal processing
Issue date2002
PublisherIEEE
Abstract(s)In 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.
TypeConference paper
URIhttp://hdl.handle.net/1822/42507
ISBN0780376579
DOI10.1109/ICIT.2002.1189336
Peer-Reviewedyes
AccessOpen access
Appears in Collections:DET/2C2T - Artigos em revistas internacionais com arbitragem científica

Files in This Item:
File Description SizeFormat 
6.6.1.21.pdf408,7 kBAdobe PDFView/Open

Partilhe no FacebookPartilhe no TwitterPartilhe no DeliciousPartilhe no LinkedInPartilhe no DiggAdicionar ao Google BookmarksPartilhe no MySpacePartilhe no Orkut
Exporte no formato BibTex mendeley Exporte no formato Endnote Adicione ao seu ORCID