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Proceedings Paper

Depth measurement of moving slurry at the wet end of a paper machine
Author(s): James S. Goddard Jr.; Hamed Sari-Sarraf; John C. Turner; Martin A. Hunt; Besma R. Abidi
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Paper 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.

Paper Details

Date Published: 8 March 1999
PDF: 7 pages
Proc. SPIE 3652, Machine Vision Applications in Industrial Inspection VII, (8 March 1999); doi: 10.1117/12.341149
Show Author Affiliations
James S. Goddard Jr., Oak Ridge National Lab. (United States)
Hamed Sari-Sarraf, Oak Ridge National Lab. (United States)
John C. Turner, Oak Ridge National Lab. (United States)
Martin A. Hunt, Oak Ridge National Lab. (United States)
Besma R. Abidi, Univ. of Tennessee/Knoxville (United States)

Published in SPIE Proceedings Vol. 3652:
Machine Vision Applications in Industrial Inspection VII
Kenneth W. Tobin Jr.; Ning S. Chang, Editor(s)

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