Online plate shape analyzing method and device for cold-rolling strip steel

The invention relates to the technical field of cold-rolling strip steel, in particular to an online plate shape analyzing method and device for cold-rolling strip steel. The method comprises the following steps of acquiring plate shape detecting data in the steel coil length direction of the cold-rolling strip steel in real time; converting the type of the plate shape detecting data into a decimalism; converting the plate shape detecting data of the decimalism into a three-dimensional figure and/or a planar figure; and showing the three-dimensional figure and/or the planar figure for users. The plate shape detecting data are converted into the decimalism, then the plate shape detecting data of the decimalism are converted into the three-dimensional figure and/or the planar figure, and situations of cold-rolling strip steel whole plate and local plate shapes can be displayed visually through the three-dimensional figure and/or the planar figure.