System and control method for embossed-in-register of sheet

A system for embossed-in-register of a sheet, comprising a printed film winding/releasing mechanism for winding/releasing a printed film, a film laminating roller for assistance in lamination of the printed film and a pattern roller spaced from the film laminating roller, wherein the printed film is periodically provided with identifiers at intervals on positions corresponding to pattern positions of the printed film;

• the system further comprises:
• a camera, disposed on a release path of the printed film and configured to acquire an image of the printed film;
• an encoder, disposed on the pattern roller and configured to detect a rotation position of the pattern roller;
• and
• a control system comprising:
• a storage unit, configured to store corresponding information of the identifiers and the pattern positions of the printed film as well as pattern information at a periphery of the pattern roller;
• a data acquisition unit, configured to acquire an image signal, acquired by the camera, of the printed film and a position signal, detected by the encoder, of the pattern roller;
• and
• a control unit, configured to acquire data from the data acquisition unit, identify a position of an identifier based on the image of the printed film, identify the rotation position of the pattern roller based on information fed back by the encoder and generate a rotation control signal of the pattern roller based on a difference of position information of the identifier and position information of the pattern roller at the same moment so as to adjust a rotation speed of the pattern roller.