数字化羊绒测色法及其在长度测量中的应用  

Digital cashmere color measurement and its application in length measurement

作　　者：衡冲 沈华[1,2] 王府梅 HENG Chong;SHEN Hua;WANG Fumei(College of Textiles, Donghua University, Shanghai 201620, China;Key Laboratory of Textile Science & Technology, Ministry of Education, Donghua University, Shanghai 201620, China)

机构地区：[1]东华大学纺织学院,上海201620 [2]东华大学纺织面料技术教育部重点实验室,上海201620

出　　处：《纺织学报》2020年第12期42-48,共7页Journal of Textile Research

基　　金：国家自然科学基金项目(51673036);中央高校基本科研业务费专项资金资助项目(CUSF-DH-D-2020014)。

摘　　要：针对光电法测试纤维长度等性质时,存在纤维的透光及反光信号与颜色高度相关的问题,采用数字化方法表征羊绒的颜色类别并精准地测量羊绒的长度。将彩色光电耦合器作为测色传感器,搭建了更适合纤维材料的测色装置;通过颜色模型在3种色空间的转换,得到3类颜色的羊绒在三维色空间的分布;基于系列实验,创建了有色羊绒的光学参数即无穷厚时的表观反射率表观反射率与测色装置计算的亮度指标之间的换算模型,并用实验证明采用测得的表观反射率可计算得到准确的须丛线密度曲线,从而可用光电法精准测量有色羊绒的长度。结果表明,该测色方法的测样面积大,代表性好,成本低,同时可用于其他纤维和纺织品的颜色测量。In photoelectric measurement of fiber length,the dependence of fiber transmittance and reflective signals on fiber brightness remains to be a problem.In order to characterize objectively the color category of cashmere and test the cashmere length precisely,a color measurement device based on color optocoupler(CCD)principle was developed.Through the transformation of color model in the three-color spaces,the distribution of cashmere of three colors in the three-dimensional color space was obtained.The conversion model between the optical parameter apparent reflectance(reflectance rate with infinite sample thickness)and brightness parameter was established based on the experiment results.The research shows that the clump density and surface density curve are accurately calculated with the apparent reflectance values obtained with the established method,which could be used in the length measurement of cashmere by photoelectric method.The color measurement method has the advantages of having large area,good representativeness and low cost,so it is able to be used for color measurement of fibers and textiles.

关 键 词：光电测色法 色空间转换 羊绒长度测量 光学信号 有色羊绒 

分 类 号：TS117[轻工技术与工程—纺织材料与纺织品设计]