Previous methods used to measure surface profiles in web handling area are hard to obtain high accuracy and efficiency simultaneously. We explored the fringe projection technique and developed a system that used a commercial projector and a digital camera and produced non-contact, full-field measurement of surface profiles with high accuracy. We applied the system to measure and reconstruct the troughs of webs and the side surface of rolls. The system has a good potential to be used in more areas of surface profiles measurement.

We reported this work in the 10th International Conference on Web Handling and won the best paper
award. Details can be found in the presentation slides iweb09.

Measurement of web troughs due to fixed end tension

Measurement of roll side surface