Gap width monitoring

Abstract

The present disclosure relates to a method of monitoring a width (w) of a gap (1) between two grinding discs (2) in a grinding device (10) for processing a fibrous fluid (6). The method comprises rotating a first disc of the grinding discs relative to a second disc of the grinding discs, about a rotational axis of the first disc. The method also comprises obtaining a frequency spectrum of mechanical vibrations in the grinding device caused by the rotating of the first disc relative to the second disc. The method also comprises, within a predetermined frequency range of the obtained frequency spectrum, determining a prevalence of vibration peaks, said prevalence being an indication of the gap width.

Dependencies are inferred from the claim text.