Yarn hairiness and diameter characterization using a CMOS line array

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• 作者：Ví ; tor Carvalho ; Michael Belsley ; Rosa M. Vasconcelos ; Filomena O. Soares
• 关键词：Yarn hairiness and diameter ; Line array CMOS optical sensors ; Signal processing ; Electronic instrumentation
• 刊名：Measurement
• 出版年：2008
• 出版时间：December 2008
• 年：2008
• 卷：41
• 期：10
• 页码：1077-1092
• 全文大小：2037 K

文摘

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.