Abstract: A topographical imaging device is placable after a creping process which causes folds to the tissue sheet and the topographical imaging device provides image data having three-dimensional information on the tissue sheet. A data processing device determines, on the basis of a shape of a cross section of at least one fold of creping of the tissue sheet, at least one of the following: thickness of the tissue sheet, softness of the tissue sheet.

Abstract: Sensor modules are triggered to start and stop the measurement approximately synchronously by sending a broadcast message. Information on the timeline of local clocks is also collected by local counters, and any relative differences in the local clocks, local sample clocks or local time stamps are rectified afterwards by means of the collected timeline information.

Abstract: An apparatus for optically measuring fluidal matter having fluid as medium and particles non-dissolved in the medium wherein the apparatus comprises a measurement chamber, which is configured to contain the fluidal matter, and a nozzle. The nozzle receives flowable matter and emits a jet of the flowable matter towards or fromwards an optical detector which is associated with the measurement chamber and receives optical radiation from the fluidal matter in the measurement chamber.

Abstract: A solution for measuring a suspension which contains wood fibres. The consistency of the suspension is changed in a consistency range. Optical radiation is directed at the suspension and the intensity of optical radiation interacted with the suspension is measured at different consistencies in the consistency range. The maximum intensity of the optical radiation is determined within the consistency range. At least one of the following properties of the suspension are determined based on the determined maximum intensity: kappa number, brightness.

Abstract: A method for optimizing reduction and content of total titratable alkali of green liquor of a recovery boiler. The method comprises producing green liquor in a dissolving tank by conveying smelt and weak white liquor into the dissolving tank and measuring at least the contents of sodium sulphate, sodium hydroxide, sodium sulphide, and sodium carbonate of the green liquor. The method comprises controlling at least a process parameter of a recovery boiler to maximize the reduction of the recovery boiler and controlling the flow of the weak white liquor into the dissolving tank to optimize the content of total titratable alkali of the green liquor. In addition, a system for producing green liquor with optimized reduction and content of total titratable alkali. The system comprises a first sensor arrangement, a first and a second regulator, and a processing unit arrangement configured to perform the method.

Abstract: An apparatus includes a piston cavity, a piston insertable in the piston cavity, and at least one flow cavity. Each flow cavity is inserted in the piston, alongside the piston cavity such that the flow cavity has a connection with the piston cavity, or between the piston and a wall of the piston cavity by means of one or more differences in cross section between the piston and the piston cavity, and the flow cavity is in contact with a liquid substance being processed. The piston moves back and forth inside the piston cavity and causes with its movement a flow of the liquid substance in each flow cavity in connection with measuring the liquid substance.

Abstract: An apparatus for checking a need for maintenance of a viscometer measuring consistency of suspension comprises a rigid rod and an elongated cavity in a measuring arm of the viscometer. The rigid rod is matched with the cavity for the rod to be movable in the cavity. The cavity is configured to become mismatched with respect to the rod in response to a bending of the measuring arm, the mismatch indicating a need for maintenance of the viscometer.

Abstract: An apparatus including a caliper measuring sensor arrangement, a mass measuring sensor arrangement, and a stabilizing arrangement. The caliper measuring sensor arrangement measures caliper of the web. The mass measuring sensor arrangement measures at least one of the following: a basis weight of the web, a moisture content, a water weight, dry weight of the web. The stabilizing arrangement stabilizes the web. The stabilizing arrangement including at least a part of the mass measuring sensor arrangement.

Abstract: A plurality of real control inputs and real process measurements provided by a real automation system controlling an industrial process are continuously stored continuously storing in a historian database. At the same time, a plurality of forecast control inputs and process measurements provided by a virtual automation system based on a simulation model are continuously stored in a futurian database. Both the past operation of the industrial process up to present time based on data from the historian database and the forecast future operation of the industrial process from the present time onwards based on data from the futurian database are displayed on the operator screen.

Abstract: Optical multi-channel measurement unit for a process measurement includes first ends for receiving optical radiation from the optical radiation source, and second ends for outputting the optical radiation for illuminating the at least one object. Optical detectors receive optical radiation from at least one measurement channel via at least one optical filter and convert an intensity of the optical radiation to an electrical signal. A movement mechanism causes, for filtering the wavelengths of the optical radiation propagating between detectors and the optical measurement channels through the optical filters, at least one of the following: movement inside at least one optical filter and movement between the filters and the detectors.

Abstract: A control loop includes a process controller for controlling a field device in a process. A remote measurement transmitter measures a desired process variable and transmits the measured variable as a wireless measurement signal to a wireless interface unit on the controller side. The interface unit passes the received measurement signal, and a trigger signal indicating a reception of a new measurement, to an adaptive estimator. When triggered by a trigger signal from the wireless interface, i.e. when a new measurement value is received, the adaptive estimator outputs the new value measurement value to the process controller. Otherwise, between consecutive trigger signals, the adaptive estimator generates an estimated measurement value that gradually moves towards a setpoint according to a predetermined estimation algorithm or process.

Abstract: An apparatus of measuring a small scale property of a sheet, the apparatus includes: a first light source for illuminating the sheet moving with respect to the illumination; a detector for forming a total intensity of reflection of the light illuminating the moving sheet by each detection; a detected dimension of the reflection on the sheet in the direction of the movement being limited the same as or shorter than a lowest acceptable spatial resolution of the measurement; a duration of each detection being equal to or shorter than the lowest acceptable spatial resolution divided by a speed of the moving sheet; and a processing unit for forming information about a small scale variation of gloss of the sheet on the basis of the detections by the detector.

Abstract: Equipment for controlling manufacture of corrugated cardboard, including: a sensor arrangement arranged to measure moisture of a liner in connection with unwinding of the liner in an unwinding part in order to control the moisture of the liner prior to gluing to a fluting on the basis of the measured moisture.

Abstract: A sampler including an ejector and a sample channel extending to the ejector, which are placeable in a mixture of particles of a solid and a medium, the medium being a gas and/or a liquid. The ejector includes at least one inlet and an outlet. The ejector takes a mixture sample by using vacuum via the inlet and discharges it via the outlet so as to make the mixture sample flow from the inlet towards the outlet. The sample channel takes a desired measuring sample from the mixture sample flowing in the ejector, the solid particles and the medium being at least partly separable from one another in the ejector on the basis of the flow and inertia in the mixture sample.

Abstract: Control equipment for the manufacture of corrugated cardboard. The manufacturing equipment includes a gluing unit, a sensor arrangement and actuator equipment. The actuator equipment is adapted to adjust the moisture on a first surface of a liner on the basis of measurements taken by the sensor arrangement for gluing the liner by its first surface to a fluting paper.

Abstract: A controller of a process includes a resource consumption optimizer which receives sets of control actions for a plurality of actuators from an advanced process controller performing independent data processing with respect to the resource consumption optimizer, each set of control actions resulting in a set-specific combined control action effect. The resource consumption optimizer optimizes resource consumption associated with the sets of control actions by modifying at least one control action on the basis of resource consumption associated with the actuator performing the control action while keeping a difference between a combined control action effect of a modified control action set and a combined control action effect a received control action set set-specifically within an accepted range.

Abstract: A measuring part measures the amount of matter dispersed in a suspension on the basis of a measurement, in which electromagnetic radiation interacts with the suspension, and the proportional volume of a free gas contained in the suspension on the basis of a measurement of electrical conductivity and/or impedance distribution for determining the amount of dispersed solid matter in the suspension.

Abstract: An apparatus in a manufacturing process of a sheet including: a measurement arrangement, a controller and an actuator arrangement regulating at least one property of the sheet; the measurement arrangement being configured to provide the controller with controlled variable data about at least one property of the sheet; the controller having available a predetermined model based on temporally or spatially dependent disturbance; and the controller being configured to form a manipulated variable for the actuator arrangement on the basis of the model in response to the disturbance.

Abstract: Detector receives optical radiation transmitted through measured object and is responsive to one or more predetermined optical absorption bands of water and cellulose and two or more separate optical bands related to spectral disturbance caused by coloring substance.