| 摘要 |
<p>PURPOSE:To calculate meandering quantity to remove the effect of meandering, by calculating the magnification of an image by comparing a plate width value and the actual plate width value of a rolled material and multiplying said magnification by the meandering quantity to a work roll center in the visual field of a camera. CONSTITUTION:When it is assumed that the plate width of a rolled material being an article to be measured is known, this known quantity W corresponds to l1+l2 in the visual field of a CCD camera 3 and, therefore, the magnification of an optical system is given as m=W/(l1+l2). As a result,the actual value Yc of meandering quantity to be calculated comes to Yc={W/(l1+l2)}{(l1-l2)/2} to be operated by an operation part 14. By this method, even if the rolled material generates up-and-down movement, the effect thereof can be cancelled and true meandering quantity can be detected. Therefore, without detecting the up-and-down movement of the rolled material by other method, the effect thereof can be removed.</p> |
