EP1528150A1 - System zur computergestützten Überwachung eines Querprofils eines Qualitätsparameters einer Materialbahn - Google Patents
System zur computergestützten Überwachung eines Querprofils eines Qualitätsparameters einer Materialbahn Download PDFInfo
- Publication number
- EP1528150A1 EP1528150A1 EP04104801A EP04104801A EP1528150A1 EP 1528150 A1 EP1528150 A1 EP 1528150A1 EP 04104801 A EP04104801 A EP 04104801A EP 04104801 A EP04104801 A EP 04104801A EP 1528150 A1 EP1528150 A1 EP 1528150A1
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- EP
- European Patent Office
- Prior art keywords
- profile
- determined
- peak
- standard deviations
- correction
- 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.)
- Granted
Links
- 238000012544 monitoring process Methods 0.000 claims abstract description 6
- 238000004519 manufacturing process Methods 0.000 claims abstract description 5
- 238000012937 correction Methods 0.000 claims description 31
- 238000012545 processing Methods 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 5
- 230000007774 longterm Effects 0.000 claims description 3
- 238000007619 statistical method Methods 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 7
- 239000011111 cardboard Substances 0.000 abstract description 3
- 239000011087 paperboard Substances 0.000 abstract description 3
- 230000015572 biosynthetic process Effects 0.000 description 5
- 238000004364 calculation method Methods 0.000 description 5
- 238000011156 evaluation Methods 0.000 description 3
- 238000012935 Averaging Methods 0.000 description 2
- 238000011089 mechanical engineering Methods 0.000 description 2
- 238000004886 process control Methods 0.000 description 2
- 238000010972 statistical evaluation Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 239000000123 paper Substances 0.000 description 1
- 238000011002 quantification Methods 0.000 description 1
Images
Classifications
-
- 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
Definitions
- the invention relates to a system for computer-aided monitoring of a Cross profile of a quality parameter of a material web, in particular paper or Cardboard web, in their production and / or finishing.
- a cross profile For example, it may be the moisture transverse profile, the thickness transverse profile, the Aschequerprofil, the basis weight (FG) - cross profile etc. act.
- the invention is based on the object, an improved system of the above with a more detailed assessment of the quality of a product respective cross-section is possible and in particular also conclusions the nature of the respective disorders and / or possible correction options allows.
- a system for computer-aided Monitoring a cross-section of a quality parameter of a material web, in particular paper or board web, in their manufacture and / or Finishing with a measuring device for measuring the cross profile, at least a computer-based operation and linking unit for determining the Standard deviations of at least two for different disorders in Shape of different peak groups in the measured transverse profile representative Disturbance profiles, whereby the different peak groups differ, that their peaks have widths lying in different areas, and with means for storing, displaying and / or further processing the determined standard deviations.
- the operator standard deviations for individual peak groups or in the assigned process control system to process.
- a respective operator thus receives important information e.g. about what kind of interference is present.
- information provided with the question of which corrective measures are useful the disturbances can at least be reduced. That's the way to go
- disorders e.g. in the moisture cross profile with a peak width larger as 1 m e.g. with a steam blower box, while in case of faults in the Moisture transverse profile corresponding to a peak width smaller than e.g. 60 mm in the Usually no correction element can take hold.
- means for storing, displaying and / or further processing the provided measured cross-section In a preferred embodiment of the system according to the invention Moreover, means for storing, displaying and / or further processing the provided measured cross-section.
- peak groups distinguished between a maximum number of peak groups distinguished. For example, between a maximum of four or five peak groups be differentiated.
- peak groups conceivable whose peaks have a width in the following ranges have: a) greater than about 1 m, b) about 1 m to about 200 mm, c) about 200 mm to about 60 mm and d) less than about 60 mm.
- any other peak width groups can be selected become.
- the maximum number of peak groups can basically also be greater or less than 4.
- Systems is initially used as a disturbance profile based on the measured transverse profile by forming the moving average over at least substantially the maximum peak width of a first peak group calculates a first correction profile.
- the standard deviation of this first correction profile is then preferred determined. This standard deviation can be used in particular as a measure of the deviations serve greater than the maximum peak width of the first peak group are.
- a first corrected profile can be determined. It can then the standard deviation of this first corrected profile is determined. This standard deviation can then be used in particular as a measure of the deviations be equal to or less than the maximum peak width the first peak group.
- the maximum peak width of the first peak group may in particular be greater as the maximum peak width of the subsequently considered peak groups.
- the moving average For example, first with a predetermined grid of about 1 m and then with predetermined grids of, for example, 200 mm and 60 mm be formed. In principle, however, also any other grid be used.
- the time for a respective peak group to each other stored values of the standard deviation can then In particular, a long-term trend of the standard deviation can be determined.
- machine data In addition to the standard deviations, in particular also machine data get saved. From the stored machine data and standard deviations can then, for example, by means of at least one seclemenden Algorithm or statistical evaluations on advantageous or critical Machine settings are closed.
- FIG. 1 shows a schematic representation of the course of a measured or preceding corrected transverse profile Y alt in the range of a grid R predetermined for a subsequent calculation of the moving average.
- the formation of a respective moving average described in greater detail below serves to eliminate part of the noise due to disturbances in the Cross profile of occurring peaks.
- the respective moving averages are used in a computerized system Monitoring the cross profile of a material web, in particular paper or Cardboard web produced.
- the computer-based surveillance system in question comprises in particular a measuring device or measuring frame for measuring the transverse profile, at least one computer-based operation and linking unit for Determining the standard deviations of at least two for different Disturbances in the form of different peak groups in the measured transverse profile representative fault profiles. The different ones differ Peak groups in that their peaks lying in different areas Have widths.
- the computerized surveillance system Means for storing, displaying and / or further processing the determined Have standard deviations.
- peak groups for example, a distinction between peak groups is conceivable whose peaks have a width in the following ranges: a) greater than about 1 m, b) about 1 m to about 200 mm, c) about 200 mm to about 60 mm and d) smaller than about 60 mm (see also Figure 3).
- other peak width ranges are conceivable.
- a distinction can generally be made between more than four or less than four peak groups.
- a disturbance profile can now first starting from the measured transverse profile by forming the moving average over at least substantially the maximum peak width of a first peak group determines a first correction profile become.
- FIG. 1 shows, in a purely schematic representation, the course of a measured or preceding corrected transverse profile Y old in the region of a grid R predetermined for a subsequent calculation of the moving average, which here amounts to 1000 mm, for example (see also FIG.
- the moving average is now obtained by averaging over the raster R at a moving value X while maintaining the grid R. For the values X, this means that averaging over a range from XR / 2 to X + R / 2 is performed.
- the formation of the respective moving average results in a correction profile Y corr (compare FIGS . 1 and 2).
- FIG. 4 shows a schematic representation of a purely exemplary course of a transverse profile from which it follows that the mean value range can be smaller than the raster R in the edge area. This applies both to the edge area on the driver's side (FS) and to the edge area on the side Drive side (TS).
- FS driver's side
- TS side Drive side
- a corrected profile Y new is obtained , with which a further interference profile is now present.
- FIG. 2 shows in a purely schematic representation of the overhead cam that obtained by the formation of the moving average correction profile Y corr and the corr by subtracting the correction profile Y old obtained from measured or the preceding corrected cross section Y corrected profile Y new. This process eliminates the wider peaks from the original cross profile.
- This process can be repeated until the last peak width group is reached.
- Peak groups are distinguished, whose peaks have a width in the following Have areas: a) greater than about 1 m, b) about 1 m to about 200 mm, c) about 200 mm to about 60 mm and d) less than about 60 mm.
- the grids 1 m, 200 mm and 60 mm can be used one after the other to form the respective moving average.
- the correction profiles Y korr obtained can each be deducted from the measured transverse profile or preceding corrected profile Y old in order to obtain the respectively new corrected profile Y new .
- the standard deviations or two 2 ⁇ values of the correction profiles Y are recalculated corr and corrected profiles Y respectively. These operations can be repeated until the last peak width group is reached.
- the existing cross profile disturbances can therefore be determined by the width of the peaks in at least two and, for example, a maximum of four groups are ordered, where the following grouping results in the present embodiment: faults with peak widths greater than 1 m, 1 m to 200 mm, 200 mm to 60 mm and smaller 60 mm.
- the standard deviations for each group can be used by the operators displayed and / or processed in the assigned process control system. The operator thus receives important information about the type of interference. In addition, information is available with which corrective measures the disturbances can at least be reduced. This is how disturbances can be greater than 1 m, for example with a steam box, while at Disturbances below 60 mm usually no longer can correct elements.
- a correction profile can be calculated from the existing or measured cross-section first by forming the moving average over the maximum peak width the first peak width group.
- the standard deviation This correction profile can be used as a measure of the interference with a Width greater than the said maximum peak width. From the original one Profile then the correction profile is subtracted. Through this process, the wider peaks eliminated from the original cross profile. This process can be repeated until the last peak width group is reached.
- the calculated standard deviations can be measured together with the measured Cross profile and / or at least one corrected profile to be displayed. additionally
- the values can be stored so that for each peak width range a long-term trend of the standard deviation is retrievable. It is also an advantage if machine data is stored in addition to the standard deviations be, for example, with the help of self-learning algorithms or statistical evaluations advantageous or critical machine settings can be detected and so the driving style of the machine can be optimized can.
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- Paper (AREA)
- Preliminary Treatment Of Fibers (AREA)
Abstract
Description
- Figur 1
- eine rein schematische Darstellung des Verlaufs eines Querprofils im Bereich eines für eine anschließende Berechnung des gleitenden Mittelwerts vorgegebenen Rasters, wobei es sich um das Querprofil eines beliebigen Qualitätsparameters handeln kann,
- Figur 2
- eine rein schematische Darstellung eines Abschnitts eines durch die Bildung des gleitenden Mittelwerts erhaltenen Korrekturprofils sowie einen Abschnitt eines durch Abziehen des Korrekturprofils vom Querprofil erhaltenen korrigierten Profils, wobei es sich wieder um das Querprofil eines beliebigen Qualitätsparameters handeln kann,
- Figur 3
- für das Beispiel eines Feuchtequerprofils eine Tabelle mit mehreren, an maschinenbaulichen Vorgaben und bekannten Störungen orientierten beispielhaften Rastern und
- Figur 4
- eine schematische Darstellung des Verlaufs eines Querprofils, aus der sich ergibt, dass im Randbereich der Mittelwertbereich kleiner sein kann als das Raster.
Zudem kann grundsätzlich auch zwischen mehr als vier oder weniger als vier Peakgruppen unterschieden werden.
- R
- Raster
- Yalt
- gemessenes Querprofil bzw. altes korrigiertes Profil
- Y korr
- Korrekturprofil
- Yneu
- neues korrigiertes Profil
- X
- Position über der Bahnbreite
Claims (16)
- System zur computergestützten Überwachung eines Querprofils eines Qualitätsparameters einer Materialbahn, insbesondere Papier- oder Kartonbahn, bei deren Herstellung und/oder Veredelung, mit einer Messeinrichtung zur Messung des Querprofils, wenigstens einer computerbasierten Operations- und Verknüpfungseinheit zur Ermittlung der Standardabweichungen von wenigstens zwei für unterschiedliche Störungen in Form unterschiedlicher Peakgruppen im gemessenen Querprofil (Yalt) repräsentativen Störungsprofilen, wobei sich die verschiedenen Peakgruppen dadurch unterscheiden, dass deren Peaks in unterschiedlichen Bereichen liegende Breiten aufweisen, und mit Mitteln zum Speichern, zur Anzeige und/oder zur Weiterverarbeitung der ermittelten Standardabweichungen.
- System nach Anspruch 1,
dadurch gekennzeichnet, dass überdies Mittel zum Speichern, zur Anzeige und/oder zur Weiterverarbeitung des gemessenen Querprofils vorgesehen sind. - System nach Anspruch 1 oder 2,
dadurch gekennzeichnet, dass zwischen einer bestimmten maximalen Anzahl von Peakgruppen unterschieden wird. - System nach Anspruch 3,
dadurch gekennzeichnet, dass zwischen Peakgruppen unterschieden wird, deren Peaks eine Breite in den folgenden Bereichen besitzen: a) größer als etwa 1 m, b) etwa 1 m bis etwa 200 mm, c) etwa 200 mm bis etwa 60 mm und d) kleiner als etwa 60 mm. - System nach einem der vorhergehenden Ansprüche,
dadurch dadurch gekennzeichnet, dass in Abhängigkeit von den jeweiligen Standardabweichungen wenigstens ein Korrekturelement aktivierbar ist. - System nach einem der vorhergehenden Ansprüche,
dadurch dadurch gekennzeichnet, dass als Störungsprofil zunächst ausgehend vom gemessenen Querprofil (Yalt) durch Bildung des gleitenden Mittelwertes über zumindest im Wesentlichen die maximale Peakbreite einer ersten Peakgruppe ein erstes Korrekturprofil (Ykorr) ermittelt wird. - System nach Anspruch 6,
dadurch dadurch gekennzeichnet, dass die Standardabweichung des ersten Korrekturprofils (Ykorr) ermittelt wird. - System nach Anspruch 6 oder 7,
dadurch gekennzeichnet, dass als weiteres Störungsprofil durch Abziehen des ersten Korrekturprofils (Ykorr) vom gemessenen Querprofil (Yalt) ein erstes korrigiertes Profil (Yneu) ermittelt wird. - System nach Anspruch 8,
dadurch gekennzeichnet, dass die Standardabweichung des ersten korrigierten Profils (Yneu) ermittelt wird. - System nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet, dass auf die gleiche Weise wenigstes ein weiteres Korrekturprofil (Ykorr) und wenigstens ein weiteres korrigiertes Profil (Yneu) ermittelt und davon die Standardabweichungen bestimmt werden, wobei ein jeweiliges weiteres korrigiertes Profil (Yneu) durch Abziehen des weiteren Korrekturprofils (Ykorr) vom vorangehenden korrigierten Profil (Yalt) ermittelt wird. - System nach Anspruch 10,
dadurch dadurch gekennzeichnet, dass so viele weitere Korrekturprofile (Ykorr) und korrigierte Profile (Yneu) ermittelt werden, bis die letzte Peakgruppe der vorgebbaren Anzahl von Peakgruppen berücksichtigt wurde. - System nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet, dass die für eine jeweilige Peakgruppe zeitlich aufeinander folgend ermittelten Werte der Standardabweichung gespeichert werden. - System nach Anspruch 12,
dadurch dadurch gekennzeichnet, dass aus den für eine jeweilige Peakgruppe erhaltenen Werten der Standardabweichung ein Langzeittrend der Standardabweichung ermittelbar ist. - , System nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet, dass zusätzlich zu den Standardabweichungen Maschinendaten speicherbar sind. - System nach Anspruch 14,
dadurch gekennzeichnet, dass aus den gespeicherten Maschinendaten und Standardabweichungen mittels wenigstens eines selbstlernenden Algorithmus auf vorteilhafte bzw. kritische Maschineneinstellungen schließbar ist. - System nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet, dass aus den gespeicherten Maschinendaten und Standardabweichungen mittels statistischer Methoden auf vorteilhafte bzw. kritische Maschineneinstellungen schließbar ist.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10350743 | 2003-10-30 | ||
| DE10350743A DE10350743A1 (de) | 2003-10-30 | 2003-10-30 | System zur computergestützten Überwachung eines Querprofils eines Qualitätsparameters einer Materialbahn |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1528150A1 true EP1528150A1 (de) | 2005-05-04 |
| EP1528150B1 EP1528150B1 (de) | 2008-11-12 |
Family
ID=34399617
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP04104801A Expired - Lifetime EP1528150B1 (de) | 2003-10-30 | 2004-09-30 | System zur computergestützten Überwachung eines Querprofils eines Qualitätsparameters einer Materialbahn |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US7149650B2 (de) |
| EP (1) | EP1528150B1 (de) |
| AT (1) | ATE414195T1 (de) |
| DE (2) | DE10350743A1 (de) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9481777B2 (en) | 2012-03-30 | 2016-11-01 | The Procter & Gamble Company | Method of dewatering in a continuous high internal phase emulsion foam forming process |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1995015492A1 (de) * | 1993-12-02 | 1995-06-08 | Siemens Aktiengesellschaft | Verfahren und vorrichtung zur untersuchung des querprofils einer kontinuierlich erzeugten materialbahn |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3612839A (en) * | 1967-11-13 | 1971-10-12 | Industrial Nucleonics Corp | Variance partitioning |
| GB1448669A (en) * | 1972-09-08 | 1976-09-08 | Bakelite Xylonite Ltd | Profile determining and/or controlling system |
| US5563809A (en) * | 1994-04-06 | 1996-10-08 | Abb Industrial Systems, Inc. | Measurement/control of sheet material using at least one sensor array |
| US5893055A (en) * | 1997-05-30 | 1999-04-06 | Abb Industrial Systems, Inc. | Two-dimensional web property variation modeling and control |
| DE19733454A1 (de) * | 1997-08-02 | 1999-02-04 | Voith Sulzer Papiermasch Gmbh | Verfahren und Vorrichtung zur Erkennung und Korretur einer Faserorientierungs-Querprofil-Veränderung |
| DE19736047A1 (de) * | 1997-08-20 | 1999-02-25 | Voith Sulzer Papiermasch Gmbh | Vorrichtung und Verfahren zur Steuerung oder Regelung des Flächengewichts einer Papier- oder Kartonbahn |
| FI107908B (fi) * | 1998-11-04 | 2001-10-31 | Metso Paper Inc | Menetelmä ja laitteisto rullan rakenteen hallitsemiseksi |
| US6339727B1 (en) * | 1998-12-21 | 2002-01-15 | Recot, Inc. | Apparatus and method for controlling distribution of product in manufacturing process |
| US6564117B1 (en) * | 2000-06-13 | 2003-05-13 | Abb Automation Inc. | Automated optimization of cross machine direction profile control performance for sheet making processes |
| US6728592B2 (en) * | 2000-08-24 | 2004-04-27 | Voith Paper Automation, Inc. | Streak detection in papermaking |
| WO2003025283A1 (en) * | 2001-09-14 | 2003-03-27 | The Research Foundation Of State University Of New York | Method and system for characterizing streak defects in web structures |
-
2003
- 2003-10-30 DE DE10350743A patent/DE10350743A1/de not_active Withdrawn
-
2004
- 2004-09-30 AT AT04104801T patent/ATE414195T1/de active
- 2004-09-30 DE DE502004008442T patent/DE502004008442D1/de not_active Expired - Lifetime
- 2004-09-30 EP EP04104801A patent/EP1528150B1/de not_active Expired - Lifetime
- 2004-10-29 US US10/976,743 patent/US7149650B2/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1995015492A1 (de) * | 1993-12-02 | 1995-06-08 | Siemens Aktiengesellschaft | Verfahren und vorrichtung zur untersuchung des querprofils einer kontinuierlich erzeugten materialbahn |
Also Published As
| Publication number | Publication date |
|---|---|
| DE10350743A1 (de) | 2005-10-27 |
| ATE414195T1 (de) | 2008-11-15 |
| DE502004008442D1 (de) | 2008-12-24 |
| US7149650B2 (en) | 2006-12-12 |
| US20050114077A1 (en) | 2005-05-26 |
| EP1528150B1 (de) | 2008-11-12 |
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