抄録
100% measurement of the sheet has been ideal for producing real high quality paper. Mechanical scanning sensors have always measured a very narrow diagonal trace on the two-dimensional moving web, so that the sensor is only able to detect less than 1 % of the variations in the full sheet. Now we are able to provide an innovative solution. Here, a non-scanning. full sheet imaging system called “HyperScan” has been realized. The measured data give paper makers completely new insight into sheet variability which has not been observed before. HyperScan is able to completely separate the measurement into machine direction and cross-machine direction. This system has been already installed at the world class wood free paper machine and the system has helped the paper maker to get the tremendous quality improvement and optimize process operation. This paper introduces the principle of the measurement technology and some application data from the field.
