Patents Assigned to Metso Automation Oy
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Patent number: 7961319Abstract: A method and an apparatus for measuring color of a moving web. The web is measured by reflectance measurement and transmittance measurement, wherein the reflectance measurement is carried out by illuminating a surface of the web in a measuring area, where on the other side of the web at the measuring area resides a solidly attached backing element and measuring the radiation reflected from the web. The transmittance measurement is carried out by illuminating the web and measuring the radiation transmitted through the web. The radiation measured in the transmittance measurement is transmitted through the backing element.Type: GrantFiled: December 22, 2005Date of Patent: June 14, 2011Assignee: Metso Automation OyInventors: Tarja Shakespeare, Mikko Toivonen, Mark Peczkis
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Patent number: 7919067Abstract: A method and an apparatus for controlling a causticizing process, the process comprising slaking, causticizing and white liquor preparation. The slaking is carried out using a slaker into which green liquor and lime is fed to produce lime milk. The causticizing process is controlled by applying a model that describes at least a part of the causticizing process.Type: GrantFiled: October 24, 2001Date of Patent: April 5, 2011Assignee: Metso Automation OyInventor: Hannu Kuoksa
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Publication number: 20100319866Abstract: Optical radiation sources functioning on different optical bands radiate on different optical bands and focus optical radiation on a region in a web surface as pulses in such a manner that illumination areas of the pulses overlap on the plane of the web. At most one optical radiation band is focused on the web from the direction of the normal. The spatial intensity distribution of at least one optical band differs from the uniform distribution and the intensity distributions of at least two different optical bands differ from one another in a predetermined manner. A camera forms still images of the web surface region on each optical radiation band. An image-processing unit determines the surface topography of the web on the basis of the images. In addition, a controller may control the paper manufacturing process on the basis of the determined surface topography.Type: ApplicationFiled: December 30, 2008Publication date: December 23, 2010Applicant: Metso Automation OYInventors: Marko Avikainen, Petri Niemi, Heikki Kettunen, Markku Mantyla, Heimo Keranen
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Patent number: 7820011Abstract: A moistening nozzle of a paper web comprises a frame (1) into which air and water are conducted. Inside the frame (1) there is arranged a water nozzle (2) wherewith water is conducted to an outlet of the moistening nozzle and an air nozzle wherewith air is correspondingly conducted to the outlet. The air nozzle (3) and the water nozzle (2) are arranged one within the other such that the air and the water form water mist that is blown out from the moistening nozzle. The air nozzle (3) is provided with an inner thread (10) that brings the air in swirling motion.Type: GrantFiled: July 7, 2005Date of Patent: October 26, 2010Assignee: Metso Automation OyInventors: Jari Almi, Niko Posti, Hannu Niemelä
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Patent number: 7822580Abstract: A system and method for monitoring a condition and an operation of a periodically moving object is provided. Herein a synchronized time average is calculated for a measurement signal, the signal containing periodical variations and obtained from the object response. In general, a frequency response is determined based on the periodical variations of the measurement signal. A signal component representing the determined frequency response is filtered from the measurement signal. The filtered signal is used as a synchronizing signal. A synchronized time average of sequences, determined by dividing the measurement signal by the synchronizing signal, is calculated.Type: GrantFiled: April 3, 2007Date of Patent: October 26, 2010Assignee: Metso Automation OYInventor: Harri Mustonen
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Patent number: 7762123Abstract: The invention relates to a seal intended for sealing an axis pair, whereby the axes rotate in the same direction, the inner one of the axes is inside the outer axis and the phase difference of the axes is arranged to remain within predefined limits. The seal (200) is a tubular seal made of an elastic material and comprises at least two tube sections (202, 204) fixed to each other. Folds (212, 214) of the at least two tube sections (202, 204) have opposing twisting angles. One end of the seal (200) is fastened to the outer axis and the other end is fastened to the inner axis, and the seal (200) is arranged to twist by a torque proportional to the phase difference between the axes.Type: GrantFiled: December 13, 2004Date of Patent: July 27, 2010Assignee: Metso Automation OyInventors: Jarmo Helasuo, Olli Ruosaari, Kari Laukkanen
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Patent number: 7752894Abstract: The method measures consistency with a rotating consistency meter. The method comprises chopping with the teeth of a chopper structure optical radiation transmitted by an optical source to an optical detector while the shafts of the rotating consistency meter rotate. In addition, a chopper reference of the chopper structure chops optical radiation to form at least one reference pulse independent of the swivel between the shafts. The duration of each reference pulse is measured when measuring consistency. The change in the reference pulse is defined by comparing the duration of the measured reference pulse with the duration of the predefined reference pulse. The durations of the measuring pulses are corrected according to the change in the duration of the reference pulse.Type: GrantFiled: April 27, 2006Date of Patent: July 13, 2010Assignee: Metso Automation OyInventors: Lauri Uusivirta, Juhani Kangas
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Publication number: 20100116032Abstract: A sensor element for a consistency transmitter for use in measurements of a pulp suspension and coated with a diamond coating. A consistency transmitter for measuring the consistency of a pulp suspension, comprising: a sensor element to be placed in the pulp suspension and provided with a diamond coating; a part provided with equipment for measuring the force/torque effective on the sensor element, for processing the force/torque by computation, and for converting the force/torque to an electrical signal; and a transmitting element, connected to the sensor element and said part, for transmitting the force/torque effective on the sensor element to said part. A method in the manufacture of a sensor element for a consistency transmitter for use in measurements of a pulp suspension, wherein the method comprises the step of coating the sensor element with a diamond coating.Type: ApplicationFiled: April 25, 2008Publication date: May 13, 2010Applicant: Metso Automation OyInventor: Olli P. Ruosaari
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Publication number: 20100024900Abstract: The invention concerns axial locking of a valve shaft to be non-turnably attached to a closing element of a valve, an end of the shaft to be attached to the closing element being machined on two opposite sides in order to fit into a pivot recess formed in the outer perimeter of the closing element. The invention is characterized by a collar part to be fitted to said end of the shaft and to be turned into a locking position, one of the end surfaces of the main part of said collar part having at least one axial projection that fits into the pivot recess of the closing element of the valve when the collar part is in the locking position and the end of the shaft is positioned into the pivot recess of the closing element.Type: ApplicationFiled: May 19, 2008Publication date: February 4, 2010Applicant: Metso Automation OYInventor: Terho Vuojamo
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Patent number: 7588643Abstract: A method and an apparatus for measuring the amount (CW) of a coating (2) on a paper web (1). The amount (CA) of at least one component in the coating (2) on the paper web (1) is measured and the composition (CC) of the coating (2) to be transferred to the paper web (1) is determined. The amount (CW) of the coating (2) on the paper web (1) is determined on the basis of the amount (CA) of at least one component in the coating (2) on the paper web (1) and the composition (CC) of the coating (2) to be transferred to the paper web (1).Type: GrantFiled: April 15, 2003Date of Patent: September 15, 2009Assignee: Metso Automation OYInventor: Markku Mäntylä
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Patent number: 7566382Abstract: A method and arrangement for controlling short circulation in a paper machine, in which the control of at least one property of the diluted fiber-containing pulp conducted to the headbox is based on consistency measurement or determination in high-consistency fiber-containing pulp, diluted pulp and/or white water. The amount of fiber-based fines in high-consistency fiber-based pulp, diluted fiber-based pulp and/or white water is determined, and the result obtained is used for controlling at least one property of the fiber-containing pulp to be conveyed to the headbox.Type: GrantFiled: August 26, 2005Date of Patent: July 28, 2009Assignee: Metso Automation OYInventor: Matti Hietaniemi
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Publication number: 20090139334Abstract: A system and a method for calculating a synchronized time average for a measurement signal obtained from an object to be measured and containing periodical variations. In the method: from the periodical variations of the measurement signal a frequency is determined, said frequency corresponding within predetermined limits to a frequency estimated as the periodicity characteristic of the object to be measured; a signal component representing the determined frequency is separated from the measurement signal by filtering, and the filtered signal is used as a synchronizing signal, and the measurement signal is divided into sequences by means of the synchronizing signal, and the synchronized time average of the sequences is calculated. In an example of the method, the rotating frequency or the moving frequency of the object selected as the periodicity characteristic to the object.Type: ApplicationFiled: April 3, 2007Publication date: June 4, 2009Applicant: Metso Automation OYInventor: Harri Mustonen
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Patent number: 7508509Abstract: An image of an object is formed on a matrix detector consisting of pixels and a property dependent on at least one dimension is measured by means of a value related to the object and proportional to the intensity of the optical radiation detected by at least one pixel.Type: GrantFiled: April 29, 2005Date of Patent: March 24, 2009Assignee: Metso Automation OyInventors: Pekka Lehtikoski, Antti Salopuro
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Publication number: 20090057439Abstract: A moistening nozzle of a paper web comprises a frame into which air and water are fed. Inside the frame there is arranged a water nozzle wherewith water is conducted to an outlet of the moistening nozzle and an air nozzle wherewith air is correspondingly conducted to the outlet. The air nozzle and the water nozzle are arranged one within the other such that the air and the water form water mist that is sprayed out from the moistening nozzle. The air nozzle is provided with a thread that brings the air in swirling motion. The air nozzle comprises a sleeve part with an opening through which air is discharged and in said opening there is arranged a piece that is an integral part of the frame of the moistening nozzle, whereby a part of the moistening nozzle frame forms an inner edge of the air gap provided by said piece and the sleeve part.Type: ApplicationFiled: July 6, 2006Publication date: March 5, 2009Applicant: Metso Automation OYInventors: Hannu Niemela, Niko Posti, Jari Almi
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Publication number: 20090025893Abstract: A method and an apparatus for determining the total peroxide content of a cellulose pulp suspension in the pulp suspension bleaching stage, wherein the bleaching chemical is peroxide. A sample is taken from the pulp suspension, which sample is measured in a measuring device (25, 25?). Before measuring, the pH of the sample is adjusted and after that the total peroxide content or the perhydroxyl content of the sample is measured, of which measurement the total peroxide content of the sample is determined.Type: ApplicationFiled: February 7, 2007Publication date: January 29, 2009Applicant: Metso Automation OyInventors: Teuvo Peltomaki, Aleksi Pohjola, Pasi Antero Keinanen
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Patent number: 7431143Abstract: A method and an apparatus for controlling feeding of solid matter in a process with at least one solid matter unloading point, at least one belt conveyor and at least one solid matter feeding point, solid matter being unloaded in the unloading point from solid matter storage to a belt conveyor arranged to convey the solid matter either directly or via at least one other belt conveyor to the feeding point. In the unloading point, the unloading of the solid matter to the belt conveyor is controlled in such a way that the thickness of the material bed follows a set value determined for it; and in the feeding point, the amount of solid matter to be fed is controlled by controlling the speed of the belt conveyor.Type: GrantFiled: September 24, 2003Date of Patent: October 7, 2008Assignee: Metso Automation OYInventors: Jaakko Hanhinen, Heikki Imelainen, Taneli Mutikainen
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Publication number: 20080029234Abstract: A paper web moistening device comprises several moistening nozzles (2) in the cross direction of a paper web for blowing water mist comprising air and water onto the paper web (3) surface. At least one means for removing water 5 mist and/or air from the vicinity of the paper web (3) surface is arranged be-tween the moistening nozzles. This means is arranged closer to the paper web (3) surface than the moistening nozzles (2).Type: ApplicationFiled: July 26, 2005Publication date: February 7, 2008Applicant: Metso Automation OYInventors: Hannu Latti, Heikki Kettunen, Antti Heikkinen, Niko Posti, Jari Almi
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Patent number: 7317198Abstract: The invention relates to a method in the control of the quality or the condition of a fibre web (21) on the basis of optical imaging diagnostics, wherein the fibre web (21) under examination and/or means (22, 23) relating to the processing of the fibre web are monitored with at least one optical imaging measuring device (1 to N). According to the method, the scale of the observation area of said at least one imaging measuring device (1 to N) is calibrated, when said measuring device is taken into use, by means of one or more calibration objects placed in the observation area of the measuring device, to correct the perspective error caused by the position between said measuring device and the object (21, 22, 23) observed by it.Type: GrantFiled: March 26, 2003Date of Patent: January 8, 2008Assignee: Metso Automation OyInventors: Pertti Aimonen, Hannes Kalaniemi, Harri Mustonen
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Patent number: 7279072Abstract: Adjusting the operation of a wire section, in which the development of the consistency of stock on the wire section (2) is determined and the effect of the consistency determined above on the formation and/or porosity of a paper web (3) is determined. The consistency developed on the wire section is adjusted based on a quality property of paper and/or by optimising a cost function, the quality property of paper comprising the formation and/or the porosity and/or a combination defined by means of the formation and/or the porosity and the cost function including the effect of at least the formation and/or the porosity.Type: GrantFiled: November 11, 2002Date of Patent: October 9, 2007Assignee: Metso Automation OyInventors: Jukka Muhonen, Hannu Korhonen, Minna Partonen, Jussi Rajala, Antti Leinonen
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Patent number: 7243052Abstract: The invention relates to a method and a system for determining hysteresis of a process device in a process environment. The process comprises collecting (50) second-level sample data ys and us from control and measurement signals u and y of a control circuit. Minute mean values y(min) and u(min), which are stored in a database (52), are calculated from these second-level measurement values. The pairs suitable for hysteresis calculation are selected from the minute-level sample pairs um and ym according to a certain procedure. The pairs are also divided into two groups. Unsuitable pairs are rejected (57). Two characteristic curves (54) are calculated from the selected pairs (um, ym) for hysteresis calculation (55). The calculation (55) also includes a routine which evaluates the reliability of the identified hysteresis.Type: GrantFiled: September 12, 2003Date of Patent: July 10, 2007Assignee: Metso Automation OyInventor: Mats Friman