Abstract: A detector receives optical radiation interacted with the measured sheet and is responsive to a predetermined optical absorption band of lignin, a predetermined optical absorption band of dry matter and two or more separate optical bands. The measuring unit measures a lignin dependent value on the basis of attenuation in the absorption band of lignin, and a dry matter dependent value on the basis of attenuation in the absorption band of the dry matter, and determines a general dependence of attenuation with respect to wavelength by measuring attenuations in the separate optical bands. The measuring unit forms a value representing a dry matter content on the basis of the lignin dependent value, the dry matter dependent value and the general dependence of attenuation.

Abstract: A measuring device comprising at least one mixer structure to receive a fiber suspension sample from at least one process part. Each mixer structure is provided with a measuring unit, a feeding valve for feeding feed liquid into a sample line for pushing the sample in the sample line towards the measuring unit, a mixing valve structure for feeding dilution liquid into the mixer structure The mixer structure mixes the flowing sample and the dilution liquid with one another in order to reduce the consistency of the sample. The measuring device measures from the first part of the mixed sample one property of the fiber suspension and the measuring device measures from the second part of the mixed sample a further property.

Abstract: The invention relates to a method and arrangement for determining the amount of starch used in surface-sizing a cellulose product. In the solution according to the invention, the amount of starch is determined with a transmission method utilizing IR spectroscopy by using absorption wavelengths of cellulose. Absorption values are measured before adding a coating and after it, whereby the amount of starch is determined from the difference between these absorption values.

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 operator tool is provided to assist an operator of a process or machine in decision making. The tool is initiated by the operator selecting a key variable, “Variable of Interest”, at the user interface. The variable of interest usually is an output variable of interest (such as quality, cost, etc.). At least most significant variables related to the selected variable of interest are automatically determined by a statistical method and shown at the user interface. The operator can adjust the related variables shown on the interface. The impact of one variable to another is demonstrated by a prediction method and shown in a numerical and/or graphical form. After being satisfied with the result of the analysis, the operator decides on which is the preferred parameter change in order to overcome the problem in question or achieve the desired improvement, and then implements the corresponding change on the real system.

Abstract: Properties of an end product, such as paper, paperboard or board, are important for the user of the end product. To be able to manufacture an end product of desired quality, it is important to know what kind of paper pulp used for manufacturing the end product results in a particular kind of property of the end product. Embodiments provide a method and an apparatus for generating a model, which model connects at least one property of the end product with at least one property of the paper pulp. On the basis of the model, also the manufacturing process can be controlled.

Abstract: The invention relates to a method and an apparatus for arranging redundancy in a process control system comprising at least one client device, at least one data source and at least one server device providing data transfer between the client device and the data source. The method comprises arranging, for the client device, at least two parallel logical connections for transferring substantially the same data between at least one data source and the client device. At the client device, property information on data units transferred via different logical connections is checked, the client device being provided with predetermined order criteria for the property information. At the client device, property information on parallel data units transferred via different logical connections is compared. Data units delivered via the logical connection having, according to the predetermined order criteria, the best property information are selected for the use of one or more applications processing the data units.

Abstract: The invention relates to a NMR method for determining moisture content of a sample, in which method a sample is subjected to a magnetic DC-field, the sample under magnetic DC-field is subjected to a sequence of excitation pulses in RF-frequency with pulse interval for exciting hydrogen nuclei, and NMR signal of the excited hydrogen nuclei is measured. In accordance with the invention spin-lattice relaxation time is estimated for the sample, and pulse interval is adjusted longer than the estimated spin-lattice relaxation time.

Abstract: A measurement device measures a liquid flow discharged from a funnel in a lower branch and/or a side branch. A modelling function is established between liquid flows received with the funnel and/or liquid flows discharged through the lower branch and/or the side branch. In drainability measurement, a sensor measures the flow through a wire out of a measurement chamber at least at two points in time. A processor establishes a parameter descriptive of the drainability from flows measured at the different points in time based on a modelling function stored in a memory.

Abstract: The invention relates to an electromagnet and a method manufacturing the same. The electromagnet includes a frame having a volume within, and a conductive wiring wound around the frame. In accordance with the invention the magnet includes at least two circular grooves having two walls parallel to the each other and perpendicular to the longitudinal axis of the frame, at least two wire stacks each including at least one substack, wherein the wire has a cross section, at least one of the walls separating the two circular grooves, and jump wiring interconnecting the stacks so that contributions from jump wires of the adjacent stacks to total axial directional current are cancelled in average by the current of the return current wire, such that their contribution to the resulting magnetic field at the sample volume is minimized.

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: 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: Disclosed is a device for reducing flow noise. In order to achieve a low flow noise, the device includes inlet apertures for receiving a fluid flow, chambers into which one or more inlet apertures open up, a cross-sectional area of a single chamber being larger than a combined flow cross-sectional area of the inlet apertures opening up thereto, and chamber-specific outlet apertures for forwarding the fluid flow from the chamber, a flow cross-sectional area of each outlet aperture being smaller than the cross-sectional area of the chamber, and the combined flow cross-sectional area of all outlet apertures of the single chamber being larger than the combined flow cross-sectional area of the inlet apertures opening up into said chamber.

Abstract: The measuring device is an on-line measuring device including a pressure generator and a sensor, by which is determined porosity of paper or board, constituting an object of measurement, by directing known suction effect to the paper or board and measuring low pressure produced by the suction effect for the determination of porosity.

Abstract: The invention relates to a device for monitoring a web. The device includes cameras imaging the web in order to take digital images of the web from a transverse area of the web at the imaging frequency. Each camera includes an image element, which consists of pixels. The individual pixels of the imaging element of the camera are real image-elements. The real image-elements are arranged to combine to form effective image-elements of the web in the machine direction. In addition, the cameras used in the device are matrix cameras, the imaging elements in which are arranged to be exposed simultaneously. The real image-elements are arranged to be combined to form effective image-elements by exploiting the binning function of the matrix camera. The device includes a strobe-lighting unit, the synchronization of which is arranged in step with the exposure of the matrix cameras, the imaging periods being common to all the cameras.

Abstract: An automation system and a method for controlling a process and for monitoring the condition of process equipment. The method comprises the steps of measuring process signals indicating the condition of the process by means of a first sensor; measuring condition monitoring signals indicating the condition of process components by means of a second sensor; processing the process signals by means of a first I/O module; processing the condition monitoring signals by means of a second I/O module; transmitting the processed process signals obtained from the first I/O module to a process station. The method also comprises the steps of transferring the processed condition monitoring signals obtained from the second I/O module to the same process station; and processing both the said processed process signals and the said processed condition monitoring signals by process station software in the said process station.

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: The solution provides a frequency distribution of a dimension of objects projected onto an image, the distribution being generated by measuring the dimension of the objects in a space in which the position of each object is at least partly free, the dimension of each object in the image depending on the position of the object. The frequency distribution of the projected objects is weighted by a weighting operation compensating for the impact of the projection in order to generate a real frequency distribution of the objects.

Abstract: A method for guiding web patching, using a re-reeler, in connection with a paper machine and an off-line coating machine, in which method a defect map of the web is created on the paper machine, to show deviations some of which are shown on the coating machine, using selected criteria, to the operator, the deviations being patched using the re-reeler, guided by the defect map and preset patching rules. On the coating machine, the virtual location of the selected deviations is monitored through the coating machine and if a possible web break occurs, a deviation is localized relative to the web break, and on the basis of this monitoring, feedback is provided to the patching rules of the re-reeler, in order to optimize them.

Abstract: The invention relates to an electromagnet and a method manufacturing the same. The electromagnet includes a frame having a volume within, and a conductive wiring wound around the frame. In accordance with the invention the magnet includes at least two circular grooves having two walls parallel to the each other and perpendicular to the longitudinal axis of the frame, at least two wire stacks each including at least one substack, wherein the wire has a cross section, at least one of the walls separating the two circular grooves, and jump wiring interconnecting the stacks so that contributions from jump wires of the adjacent stacks to total axial directional current are cancelled in average by the current of the return current wire, such that their contribution to the resulting magnetic field at the sample volume is minimized.