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Bing Cao

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Proceedings Article | 6 August 2009 Paper

Research on detecting heterogeneous fibre from cotton based on linear CCD camera

Xian-bin Zhang, Bing Cao, Xin-peng Zhang, Wei Shi

Proceedings Volume 7384, 73842Q (2009) https://doi.org/10.1117/12.836616

KEYWORDS: Image processing, Signal processing, Optical fibers, Light sources, CCD cameras, Light emitting diodes, Imaging systems, Lamps, Optical design, Computing systems

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The heterogeneous fibre in cotton make a great impact on production of cotton textile, it will have a bad effect on the quality of product, thereby affect economic benefits and market competitive ability of corporation. So the detecting and eliminating of heterogeneous fibre is particular important to improve machining technics of cotton, advance the quality of cotton textile and reduce production cost. There are favorable market value and future development for this technology. An optical detecting system obtains the widespread application. In this system, we use a linear CCD camera to scan the running cotton, then the video signals are put into computer and processed according to the difference of grayscale, if there is heterogeneous fibre in cotton, the computer will send an order to drive the gas nozzle to eliminate the heterogeneous fibre. In the paper, we adopt monochrome LED array as the new detecting light source, it's lamp flicker, stability of luminous intensity, lumens depreciation and useful life are all superior to fluorescence light. We analyse the reflection spectrum of cotton and various heterogeneous fibre first, then select appropriate frequency of the light source, we finally adopt violet LED array as the new detecting light source. The whole hardware structure and software design are introduced in this paper.

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