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Proceedings Paper

Fiber optic flocculation sensor
Author(s): Lun K. Cheng; Uilke Stelwagen
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Paper Abstract

A fiber optic flocculation sensor based on measuring the intensity of light reflected by solid particles in suspension (i.e. paper pulp) in a well defined measurement volume, was constructed. This sensor is designed for monitoring the flocculation state of paper pulp in the papermaking process. The flocculation determines to a great extent the quality of the final product, the paper. Tests with different types of pulp were performed in both a closed loop system and a small paper machine. In this investigation the flocculation state is expressed as a root mean square flocculation index. The flocculation index delivered by this fiber optic system shows a very high correlation with the flocculation index provided by a camera system `looking at' the same pulp, while the latter has a great resemblance with the human perception of the flocculation.

Paper Details

Date Published: 7 February 1994
PDF: 8 pages
Proc. SPIE 2072, Fiber Optic Physical Sensors in Manufacturing and Transportation, (7 February 1994); doi: 10.1117/12.166846
Show Author Affiliations
Lun K. Cheng, TNO Institute of Applied Physics (Netherlands)
Uilke Stelwagen, TNO Institute of Applied Physics (Netherlands)


Published in SPIE Proceedings Vol. 2072:
Fiber Optic Physical Sensors in Manufacturing and Transportation
John W. Berthold III; Richard O. Claus; Michael A. Marcus; Robert S. Rogowski, Editor(s)

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