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TitleYarn hairness and diameter characterization using a CMOS line array
Author(s)Carvalho, Vítor
Belsley, M.
Vasconcelos, Rosa
Soares, Filomena
KeywordsYarn hairness and diameter
Line array CMOS optical sensors
Signal processing
Electronic instrumentation
Issue date14-Mar-2008
Citation“Measurement”. ISSN 0263-2241. 41 (Mar. 2008) 1077-1092.
Abstract(s)This paper presents a new system for determining yarn hairiness and diameter using a CMOS linear array together with a data acquisition board and custom developed software. The final image is generated using coherent optical signal processing with a Fourier high-pass spatial filter. The system was previously tested and validated in simulation using an image analysis line profile tool. Several analyses were performed in a laboratorial environment testing different yarns. Finally, the results obtained with this new system are compared to those obtained previously using a simple photodiode in place of the linear photodiode array. The new system is more precise although the data processing requires significant computational effort.
AccessOpen access
Appears in Collections:DET/2C2T - Artigos em revistas internacionais com arbitragem científica

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