Method and device for detecting shape of sheet roll

A device for detecting a shape of a sheet roll, comprising:

• a rotatable support;
• a photographing unit having at least one camera that is disposed on the support to photograph a cylindrical side surface of a sheet roll;
• a vertical moving unit that moves the support in a vertical direction along the cylindrical side surface of the sheet roll by an operation of a second motor;
• a vertical moving unit that moves the support back and forth in a horizontal direction along the cylindrical side surface of the sheet roll by an operation of a first motor;
• a third motor that is disposed between the support and the vertical moving unit in order to rotate the support to be opposite to the side surface of the sheet roll;
• a position controller that transfers a control signal to the first to third motors to control the horizontal and vertical positions of the support and rotate the support at a predetermined angle;
• and
• a data processor that determines whether there is a defect in the shape of the winding roll by analyzing the image pattern acquired from the camera.