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TitleYarn: mass measurement with 1-mm length samples
Author(s)Pinto, J. G.
Carvalho, Vítor
Monteiro, João L.
Vasconcelos, Rosa
Soares, Filomena
Yarn evenness
signal processing
capacitive sensor
Issue dateApr-2007
JournalIEEE Transactions on Industrial Electronics
Citation"IEEE Transactions on Industrial Electronics." ISSN 0278-0046. 54:2 (Abr. 2007) 1177-1183.
Abstract(s)In textile production, measurement of yarn mass in the 1-mm range is of utmost importance to properly evaluate evenness, as several irregularities occur in 1—4-mm yarn Iength. Direct measurements in the 1-mm range are not available in commercial equipment. One of the most common, from Uster, is based on yarn samples of 8 mm. This paper presents a direct mass measurement in the 1-mm range system based on parallel capacitive sensors and signal-processing techniques for detection of periodical errors. Results point out that evaluation of yarn mass, with this approach, is feasible in the 1-mm range, allowing online measurement (1-mm yarn mass) in a spinning frame for real-time control. Despite low signal-to-noise ratio, it is possible to measure small variations of yarn mass (typical capacity variation of 2.08 x 10-17 F for 57 tex—O.057 g/m of yarn). As a spin-off of this project, a new low-cost control system is being prepared for detection of yarn break and bobbin end in knitting flat machines. Online quality classification is also feasible with the developed system.
AccessOpen access
Appears in Collections:CAlg - Artigos em revistas internacionais/Papers in international journals
DET/2C2T - Artigos em revistas internacionais com arbitragem científica

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