基于奇异值分解算法的非接触纱线张力测量  

Non-contact yarn tension measurement based on singular value decomposition algorithm

作　　者：蒋静 彭来湖[1,3] 史伟民[1,2] 袁豪伟 JIANG Jing;PENG Laihu;SHI Weimin;YUAN Haowei(School of Mechanical Engineering,Zhejiang Sci-Tech University,Hangzhou,Zhejiang 310018,China;Key Laboratory of Modern Textile Machinery&Technology of Zhejiang Province,Zhejiang Sci-Tech University,Hangzhou,Zhejiang 310018,China;Zhejiang Sci-Tech University Longgang Research Institute,Wenzhou,Zhejiang 325000,China)

机构地区：[1]浙江理工大学机械工程学院,浙江杭州310018 [2]浙江理工大学浙江省现代纺织装备技术重点实验室,浙江杭州310018 [3]浙江理工大学龙港研究院有限公司,浙江温州325000

出　　处：《纺织学报》2024年第9期204-211,共8页Journal of Textile Research

摘　　要：为解决目前接触式纱线张力检测易对纱线运动产生干扰的现状,设计了基于图像处理的非接触式纱线张力测量系统。使用高速相机结合纱线弦振动理论基础和图像处理技术采集运动状态纱线图像信息。利用奇异值分解算法通过视频图像数据降维、重组振动位移提取、迭代去噪等操作获取振幅频率信息。借助快速傅里叶变换将纱线振动时域特性转换为频域特性并绘制频域图及时域图,最后搭建纱线振动监测实验平台检验算法的可行性和可靠性。结果表明:纱线张力和纱线频率具有正相关性,当纱线张力在50~80 cN之间时,通过对比实验得到算法求解的纱线张力与实际测量的张力绝对误差小于10%,可较好地反映纱线实时张力情况。基于机器视觉的非接触式纱线张力具有安装简单,实时性强,精度高等特点,避免了接触式张力测量方法存在的损伤纱线和测量精度受工艺环境干扰等弊端。Objective Yarn tension is closely related to product quality and production efficiency.The size and stability of tension run through each process from spinning to manufacturing.The excessive tension of yarn will lead to irreversible deformation of yarn,which will not only increase the yarn breaking rate,but also affect the mechanical strength,surface performance,dyeing performance and process structure of the fabric.The excessive tension of yarn will lead to poor formation of fabric organization,poor structure and poor elasticity.Modern technology requires the size and stability of yarn tension is increasingly high,so it is extremely important to realize the real-time measurement of yarn tension in operation.Method The singular value decomposition(SVD)algorithm is adopted to obtain the amplitude frequency information by reducing the dimension of video image data,recombining vibration displacement extraction,and iterative denoising.With the help of fast Fourier transform,the yarn vibration time domain characteristics are converted into frequency domain characteristics and draw the frequency domain map,and finally,the yarn vibration monitoring experiment platform is built to test the feasibility and reliability of the algorithm.Results An experimental set-up was built and experimentally verified to test the feasibility and reliability of the provided scheme.Different yarn running speeds were set and the experimentally derived tensions were compared with the measured tension magnitudes during yarn movement.The results indicated that when the speed of yarn movement was increased,the vibration amplitude of the yarn became smaller,the vibration frequency of the yarn larger,and the tension of the yarn larger.The tension of the yarn and the vibration frequency of the yarn were positively correlated,which is consistent with the theoretical equation of yarn vibration.Statistical results of yarn tension calculated by conventional image processing showed that when the yarn motion speed was 50-70 mm/s,the experimental value o

关 键 词：奇异值分解算法 纱线振动 图像处理 纱线张力 非接触式检测 

分 类 号：TH145.2[一般工业技术—材料科学与工程]