A structured light vision system for out-of-plane vibration frequencies location of a moving web
A structured light vision system for out-of-plane vibration frequencies location of a moving web
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DOI：
10.1007/s00138-005-0183-8
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发表时间：
2005-12-01
影响因子：
3.3
通讯作者：
Knittel, D
中科院分区：
文献类型：
--
作者：
Doignon, C;Knittel, D
在本文中，我们解决了利用单个摄像机和激光网点图案装置来检测离面腹板振动的问题。我们的动机是卷取/退卷系统中出现的纸幅振动现象对经济的重要影响。在众多的干扰源中，弹性运动幅材的离面振动被认为是幅材运输行业中速度的最大限制因素之一，我们提出了一种非接触估计幅材离面振动特性和缠绕过程的新技术是本文的主要贡献。据我们所知，这是第一次提出一种技术来评估有摄像头的移动网络的振动。根据卷筒横截面相对于摄像机的距离变化来估计振动频率。在卷筒宽度为10厘米的弹性织物的卷绕设备上进行了实验。整个图像序列都估计了从腹板表面到摄像机的距离，并从该信号的变化(强迫和自由振动)中提取了最重要的频率，并将其与应变仪提供的频率和运动中的简单弹性弦模型进行了比较。
In this paper, we address the problem of the detection of out-of-plane web vibrations by means of a single camera and a laser dots pattern device. We have been motivated by the important economical impact of web vibrations phenomena which occur in winding/unwinding systems. Among many sources of disturbances, out-of-plane vibrations of an elastic moving web are well-known to be one of the most limiting factors for the velocity in the web transport industry.The new technique we proposed for the contact-less estimation of out-of-plane web vibration properties and during the winding process is the main contribution of this work. As far as we know, this is the first time a technique is proposed to evaluate the vibrations of a moving web with a camera. Vibration frequencies are estimated from distance variations of a web cross-section with respect to the camera.Experiments have been performed on a winding plant for elastic fabric with a web width of 10 cm. Distances from the web surface to the camera have been estimated all along an image sequence and the most significant frequencies have been extracted from the variations of this signal (forced and free vibrations) and compared to those provided with strain gauges and also with a simple elastic string model, in motion.