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WO2012035049A1 - Procédé de réglage de la fraction surfacique de taches - Google Patents

Procédé de réglage de la fraction surfacique de taches Download PDF

Info

Publication number
WO2012035049A1
WO2012035049A1 PCT/EP2011/065911 EP2011065911W WO2012035049A1 WO 2012035049 A1 WO2012035049 A1 WO 2012035049A1 EP 2011065911 W EP2011065911 W EP 2011065911W WO 2012035049 A1 WO2012035049 A1 WO 2012035049A1
Authority
WO
WIPO (PCT)
Prior art keywords
dirt
camera
fibrous web
web
dot area
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/EP2011/065911
Other languages
German (de)
English (en)
Inventor
Günther Kriechbaum
Armin Bauer
Jürgen KÄSER
Alexander Wohlmuth
Jens Haag
Christian Naydowski
Martin Staiger
Herbert Britz
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Voith Patent GmbH
Original Assignee
Voith Patent GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Voith Patent GmbH filed Critical Voith Patent GmbH
Priority to CN2011800554100A priority Critical patent/CN103228837A/zh
Priority to EP11757302.2A priority patent/EP2616587A1/fr
Publication of WO2012035049A1 publication Critical patent/WO2012035049A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21D—TREATMENT OF THE MATERIALS BEFORE PASSING TO THE PAPER-MAKING MACHINE
    • D21D1/00—Methods of beating or refining; Beaters of the Hollander type
    • D21D1/004—Methods of beating or refining including disperging or deflaking
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21G—CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
    • D21G9/00—Other accessories for paper-making machines
    • D21G9/0009—Paper-making control systems
    • D21G9/0018—Paper-making control systems controlling the stock preparation

Definitions

  • the invention relates to a method for controlling the Schmutz Vietnamese Type II Schmutztician Type IIIanteils a running fibrous web, in particular a paper, tissue or board web. Dirt spots on or in a fibrous web arise when in the fiber suspension dirt particles such. Color particles are included. The dirt particles may have sizes between 50pm and 500pm, sometimes larger.
  • the optical properties of the end product are significantly improved.
  • dispersers are used to separate the dirt particles from the fibers. Due to the fluctuating quality of the registered raw material, but especially in the use of waste paper of different origin, the efficiency of the disperser changes and there are fluctuations in the optical properties of the fibrous web.
  • the fluctuation of the dirt dot area of the fibrous web is measured.
  • the number of dirt particles also changes. Not all particles of dirt in the suspension find their way into the fibrous web or appear in the paper web, so that not all dirt particles are relevant to product quality.
  • the efficiency of the separation of the dirt particles in the disperser can be adjusted via the energy input or the energy consumption. If the dirt spots are not measured, as on most production plants, a fluctuating product quality must be accepted or the disperser must be operated at a sufficiently high energy input and therefore high energy consumption so that the dirt dot areas do not exceed the maximum permitted value.
  • the object of the invention is to provide a method for controlling the dirt dot surface portion of a fibrous web, with which the production-related fluctuations of the dirt dot surface can be reduced and the optical properties of the fibrous web can be improved.
  • the object is achieved by means of the method with the features of claim 1 and a system according to claim 12.
  • the present invention achieves the object by using a method for controlling the dirt dot surface portion of a moving fibrous web, in particular a paper, tissue or board web, in which an image of a region of the moving fibrous web is taken with at least one camera having at least one Image processing method determines the dirt dot surface portion of the recorded area as a controlled variable and holds a dirt point control the dirt dot area proportion to a predetermined target level.
  • Dirt points in the sense of the invention are dirt particles which can have a great variety of shapes and sizes, such as e.g. granular or disc-shaped, wherein a particle size may have a value between 50 pm to over 500 pm.
  • the position of the illumination or the light source, with respect to the region of the fibrous web in which the image is to be recorded plays a decisive role.
  • the area is illuminated with a light source, so that all dirt spots in the surface area of the fibrous web can be detected by the camera.
  • the light source illuminates the surface of the fibrous web. So are particularly advantageous only visible on the surface dirt particles in the scheme.
  • the second possibility is that the area is illuminated by a light source, so that all dirt spots in the fibrous web are detected. This is particularly advantageous for thin papers in which the dirt particles lying in the middle layer also have a disturbing effect when viewing the eg paper sheet.
  • the camera or the camera system consisting of camera and lighting, can be moved traversing across the entire web width, in the web transverse direction, via fibrous web to control image data over the entire web width to capture. Alternatively, multiple cameras or camera systems can be positioned next to each other across the web width.
  • the resolution of the camera is preferably chosen so that it can detect dirt spots that have a particle size of about 500 pm.
  • the camera must have at least a resolution of 225 pm or at least 50 pm.
  • an image processing method can be used, with which the dirt particles can be classified according to size and type of image analysis. So advantageous manipulated variables can be changed which have direct or indirect influence on the corresponding type of dirt particles.
  • the dirt dot area fraction is expediently maintained at a predefinable desired level by correspondingly changing one or more manipulated variables.
  • At least the energy input into the disperser is preferably controlled or regulated in order to keep the dirt dot area proportion at a predefinable desired level.
  • the introduction of chemicals into the suspension can be controlled or regulated in order to keep the dirt dot area proportion at a predefinable desired level.
  • At least one dirt particle area component determined online is input into a controller for regulating the dirt dot area and the soil dot area component is maintained at the predetermined desired level by appropriately controlling or regulating one or more control variables.
  • the adjustment of the manipulated variables can be done automatically or manually. For example, a Note with the request to change the energy entry in the PLS appear.
  • a plant according to the invention for producing a fibrous web comprises at least one soil point control with which the soil dot area proportion is kept at a predefinable desired level.
  • the at least one camera or camera system is mounted in the area of the raw paper.
  • the at least one camera or camera system is integrated in the Web Inspection System and / or arranged before the reeling.
  • a further embodiment of the invention further provides that the at least one camera can also be used for the formation measurement.
  • FIG. 1 is a diagram illustrating the relationship between dirt and points and energy entry Disperger
  • FIG. 1 shows a diagram for depicting the relationship between dirt spots and energy input disperser.
  • the dirt spots are detected on or in the fibrous web as already described and determined by means of an image processing method of Schmutztician Designanteil in mm 2 / m 2 .

Landscapes

  • Paper (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)
  • Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)

Abstract

L'invention concerne un procédé de réglage de la fraction surfacique de taches d'une bande de matière fibreuse en mouvement, en particulier d'une bande de papier, de papier mousseline ou de carton, une prise de vue d'une région de la bande de matière fibreuse en mouvement étant effectuée à l'aide d'au moins une caméra qui détermine par au moins une méthode de traitement d'image la fraction surfacique de taches de la région enregistrée comme grandeur régulée et la fraction surfacique de taches étant maintenue à un niveau de consigne pouvant être prédéfini au moyen d'un réglage des taches.
PCT/EP2011/065911 2010-09-17 2011-09-14 Procédé de réglage de la fraction surfacique de taches Ceased WO2012035049A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN2011800554100A CN103228837A (zh) 2010-09-17 2011-09-14 用于调节尘埃斑点面积份额的方法
EP11757302.2A EP2616587A1 (fr) 2010-09-17 2011-09-14 Procédé de réglage de la fraction surfacique de taches

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE201010040951 DE102010040951A1 (de) 2010-09-17 2010-09-17 Verfahren zur Regelung des Schmutzpunktflächenanteils
DE102010040951.0 2010-09-17

Publications (1)

Publication Number Publication Date
WO2012035049A1 true WO2012035049A1 (fr) 2012-03-22

Family

ID=44651785

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2011/065911 Ceased WO2012035049A1 (fr) 2010-09-17 2011-09-14 Procédé de réglage de la fraction surfacique de taches

Country Status (4)

Country Link
EP (1) EP2616587A1 (fr)
CN (1) CN103228837A (fr)
DE (1) DE102010040951A1 (fr)
WO (1) WO2012035049A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111930084B (zh) * 2020-08-04 2022-09-23 广东理文造纸有限公司 基于纸面尘埃检测的无尘纸生产控制系统及方法

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4931657A (en) * 1989-04-13 1990-06-05 Macmillan Bloedel Limited On-line texture sensing
EP1186706A2 (fr) * 2000-09-06 2002-03-13 Voith Paper Patent GmbH Traitement de fibres ou de papier
WO2007122290A1 (fr) 2006-04-21 2007-11-01 Metso Automation Oy Procédé pour commander une ligne de recyclage de fibres, et ligne de recyclage de fibres
WO2008034953A1 (fr) 2006-09-21 2008-03-27 Metso Automation Oy Flottaison dans un processus à fibres recyclées
EP2221607A1 (fr) * 2009-02-20 2010-08-25 Voith Patent GmbH Procédé et dispositif de mesure destinés à la détection et à l'évaluation optiques d'une bande contenant des fibres

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI110343B (fi) * 1999-02-25 2002-12-31 Honeywell Oy Paperikoneen ratakatkojen monitorointijärjestelmä
ATE445872T1 (de) * 2007-02-01 2009-10-15 Abb Oy Verfahren zur erstellung eines optimierten schnittplans für ein streifenförmiges material

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4931657A (en) * 1989-04-13 1990-06-05 Macmillan Bloedel Limited On-line texture sensing
EP1186706A2 (fr) * 2000-09-06 2002-03-13 Voith Paper Patent GmbH Traitement de fibres ou de papier
WO2007122290A1 (fr) 2006-04-21 2007-11-01 Metso Automation Oy Procédé pour commander une ligne de recyclage de fibres, et ligne de recyclage de fibres
WO2008034953A1 (fr) 2006-09-21 2008-03-27 Metso Automation Oy Flottaison dans un processus à fibres recyclées
EP2221607A1 (fr) * 2009-02-20 2010-08-25 Voith Patent GmbH Procédé et dispositif de mesure destinés à la détection et à l'évaluation optiques d'une bande contenant des fibres

Also Published As

Publication number Publication date
EP2616587A1 (fr) 2013-07-24
CN103228837A (zh) 2013-07-31
DE102010040951A1 (de) 2012-03-22

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