Depth measurement of moving slurry at the wet end of a paper machine

James S. Goddard Jr.; Hamed Sari-Sarraf; John C. Turner; Martin A. Hunt; Besma R. Abidi

doi:10.1117/12.341149

8 March 1999 Depth measurement of moving slurry at the wet end of a paper machine

James S. Goddard Jr., Hamed Sari-Sarraf, John C. Turner, Martin A. Hunt, Besma R. Abidi

Proceedings Volume 3652, Machine Vision Applications in Industrial Inspection VII; (1999) https://doi.org/10.1117/12.341149
Event: Electronic Imaging '99, 1999, San Jose, CA, United States

Abstract

The paper industry has long had a need to better understand and control its papermaking process upstream, specifically at the wet end in the forming section of a paper machine. A vision-based system is under development that addresses this need by automatically measuring and interpreting the pertinent paper web parameters at the wet end in real time. The wet-end characterization of the paper web by a vision system involves a 4D measurement of the slurry in real time. These measurements include the 2D spatial information, the intensity profile, and the depth profile. This paper describes the real-time depth profile measurement system for the high-speed moving slurry. A laser line-based measurement method is used with a high-speed programmable camera to directly measure slurry height. The camera is programmed with a profile algorithm, producing depth data at fast sampling rates. Analysis and experimentation have been conducted to optimize the system for the characteristics of the slurry and laser line image. On-line experimental results are presented.

Citation Download Citation

James S. Goddard Jr., Hamed Sari-Sarraf, John C. Turner, Martin A. Hunt, and Besma R. Abidi "Depth measurement of moving slurry at the wet end of a paper machine", Proc. SPIE 3652, Machine Vision Applications in Industrial Inspection VII, (8 March 1999); https://doi.org/10.1117/12.341149

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