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AssigneeMetso Paper, Inc.
InventorsEero Suomi, Matti Tervonen
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The object of the invention is a control and an adjustment method for the fibre web machine. According to the invention—an emitting voice is measured continuously at least from one section of the fibre web machine and frequency bands (df) and/or the combinations of the frequency bands and amplitudes of the same, which correlate state and change of different process values, are separated measuring signals (fm);—the measuring signals are compared with reference signals (fref), which correlate an ideal state or a desired state; and—control signals are generated from deviations of the measuring signals and reference signal (fA), by which control signals the measured process values are returned closer to the ideal state or the desired state.
A control method and an adjustment method for a fibre-web machine, characterized in that voice or noise that is emitting from at least from one section of the fibre web machine is measured continuously and frequency bands (df) and/or combinations of the frequency bands and the corresponding amplitudes thereof, which correlate state and change of different process values, are separated from the received measuring signals (fm), that the measuring signals are compared with reference signals (fref), which correlate ideal state or desired state, and that from deviations (fA) of the measuring signals and reference signal are formed control signals, by means of which the measured process values are returned closer to the ideal state or the desired state.
A control arrangement and an adjustment arrangement for a fibre web machine, characterized in that a constant measuring of voice or noise has been arranged at least in one section of the fibre web machine, that a measuring signal (fm), which correlates state and change of a process value, is in an optional frequency band (df) and/or in an optional combination of frequency bands, and that a control signal is formed by comparing the measuring signal with the reference signal (fref), which correlates ideal state or desired state, in which case the control signal can be formed by means of deviation of the measuring signals and a reference signal (fA), by means of which control signal the process value can be returned closer to the ideal state or the desired state.
Dependencies are inferred from the claim text.