Yarn hairness and diameter characterization using a CMOS line array
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 p...
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| Other Authors: | , , |
| Format: | article |
| Language: | eng |
| Published: |
2008
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| Subjects: | |
| Online Access: | http://hdl.handle.net/1822/9286 |
| Country: | Portugal |
| Oai: | oai:repositorium.sdum.uminho.pt:1822/9286 |
| Summary: | 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. |
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