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Characterization of single cotton fibers using a laser diffraction system

机译：使用激光衍射系统表征单根棉纤维

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摘要

The fineness and maturity of a cotton fiber is determined by its cross-sectional perimeter and area. However, measuring fiber cross-sectional perimeter and area is an extremely tedious and challenging task. This paper presents an alternative approach to measure fiber longitudinal width using Fraunhofer diffraction patterns, which can be used to estimate fiber fineness and maturity. We designed a laser diffraction system, developed a software program to denoise and process diffraction patterns, and tested the system on a uniform iron wire and individual cotton fibers from ten bales. The width of the iron wire measured by our system was 25.43 μm (0.1% different from the nominal value) with a 0.01 μm standard error of the mean. Cotton fiber width measured by the laser diffraction system could differentiate among ten cotton bales, which was in accordance with their relative differences in fineness. Linear regression analyses revealed that strong linear relationships exist between the fiber width and cross-sectional perimeter and area (r^sup 2^ = 0.81 and 0.77, respectively), as well as between the fiber width and fineness and micronaire (r^sup 2^ = 0.79 and 0.73, respectively) (n = 10, p = 0.01). This simple, replicable, and relatively inexpensive optical system could be used for single fiber longitudinal profile characterization and cotton fineness and maturity estimation.
机译：棉纤维的细度和成熟度取决于其横截面周长和面积。但是，测量纤维横截面的周长和面积是一项非常繁琐且具有挑战性的任务。本文提出了一种使用Fraunhofer衍射图样测量纤维纵向宽度的替代方法，该方法可用于估算纤维的细度和成熟度。我们设计了激光衍射系统，开发了用于对衍射图进行降噪和处理的软件程序，并在一根均匀的铁丝和来自十包的单根棉纤维上测试了该系统。通过我们的系统测量的铁丝宽度为25.43μm（与标称值相差0.1％），平均值的标准误为0.01μm。通过激光衍射系统测量的棉纤维宽度可以区分十个棉包，这取决于它们的细度相对差异。线性回归分析表明，纤维宽度与横截面周长和面积之间存在强线性关系（分别为r ^ sup 2 ^ = 0.81和0.77），以及纤维宽度和细度与马克隆值之间（r ^ sup 2 ^分别为0.79和0.73）（n = 10，p = 0.01）。这种简单，可复制且相对便宜的光学系统可用于单纤维纵向轮廓表征以及棉花细度和成熟度估计。

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