| 摘要 |
A system for measuring the degree of edge curl present in a web of material includes a light source for illuminating a line extending across a surface portion of the web to an edge thereof, and an optical detection device responsive to reflections from the illuminated line for acquiring an image representative of the profile of the line. A CPU operates to digitize and store the image as discrete profile data points. The process continues by identifying at least one reference profile data point associated with a linear portion of the image at a location inside of the edge, and identifying a second reference profile data point associated with a portion of the image at a location having the greatest linear deviation from the linear portion of the image as represented by the reference profile data point, the linear deviation being representative of the degree of edge curl in the web. According to a further aspect of the invention, a curl removal device is provided which is responsive to the calculated linear deviation for removing the curl from the web. |
