Stora Enso Ab

Susanne Lindh

Jan Lif

Thorulf Pettersson

Magnus Björklund

A method for monitoring the structural state of a fiber web () that is being processed by a fiber web processing machine comprising a fiber web processing station () is described. The method comprises the steps of arranging a generator () and a detector () of a generator-detector unit () on opposite sides of the traveling fiber web () downstream of the fiber web processing station; bringing the generator to emit an ultrasonic wave; bringing the detector to receive the ultrasonic wave; sending a signal representing the received ultrasonic wave to a control unit (); and, in the control unit, analyzing the signal and extracting a value from the signal representing a measure of the received ultrasonic wave. A system for monitoring the structural state of a fiber web is also described.

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Avesta, Sweden

Susanne Lindh