Method of detecting surface damages in the stone roll of the...

Details Method of detecting surface damages in the stone roll of the... Method of detecting surface damages in the stone roll of the...

G - Physics

01

B

349/42

G01B 5/28 (2006.01) D21F 3/00 (2006.01) D21F 3/04 (2006.01) D21F 3/08 (2006.01)

Patent

CA 1320757

Abstract The invention relates to a method of detecting sur- face damages in a stone roll of a press section in a paper machine or the like. The stone roll is provided with a doctor blade arranged in a pivotable holder so as to extend over the whole length of the roll for scraping the surface of the roll. In order that sur- face damages in the stone roll could be detected during the run, shocks exerted on the doctor blade due to surface damages in the stone roll are recorded by acceleration transducers arranged in the holder. The signal obtained from each transducer is summed in a synchronized manner with the rotation of the roll. (Figure 2)

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