EP0799348B1 - Verfahren zur erfassung und beeinflussung der querprofile bestimmter eigenschaften von papierbahnen und zugehörige anordnung - Google Patents

Verfahren zur erfassung und beeinflussung der querprofile bestimmter eigenschaften von papierbahnen und zugehörige anordnung Download PDF

Info

Publication number
EP0799348B1
EP0799348B1 EP95940956A EP95940956A EP0799348B1 EP 0799348 B1 EP0799348 B1 EP 0799348B1 EP 95940956 A EP95940956 A EP 95940956A EP 95940956 A EP95940956 A EP 95940956A EP 0799348 B1 EP0799348 B1 EP 0799348B1
Authority
EP
European Patent Office
Prior art keywords
paper
fibre orientation
paper web
formation
fiber orientation
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.)
Expired - Lifetime
Application number
EP95940956A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0799348A1 (de
Inventor
Jürgen ADAMY
Clemens Graf
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.)
Siemens AG
Original Assignee
Siemens AG
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 Siemens AG filed Critical Siemens AG
Publication of EP0799348A1 publication Critical patent/EP0799348A1/de
Application granted granted Critical
Publication of EP0799348B1 publication Critical patent/EP0799348B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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
    • D21G9/0027—Paper-making control systems controlling the forming section

Definitions

  • the invention relates to a method for detection and influencing the cross profiles of certain properties of paper webs, such as in particular fiber orientation or Formation, opacity, basis weight and / or shrinkage.
  • the invention also relates to the associated one Arrangement for performing this method of use in paper machines.
  • the quality of paper is uniformity the paper properties across the production direction essential.
  • the location-dependent courses of the paper properties transverse profiles to the production direction are called.
  • Monitoring and regulation of paper properties require a measurement of these cross profiles.
  • EP-A-0 408 894 describes a method for regulating and online measurement of fiber orientation in a photoconductive Paper web of a paper machine known in which a cross profile the fiber orientation is specified as the setpoint, the basis weight is measured continuously and by change of the local basis weight the cross profile of the fiber orientation is adapted to the setpoint curve. So can the cross profile of the fiber orientation by controlling the Adjustment spindles on the headbox while changing the basis weight of the paper optimized. Furthermore, from the JP-A-3037556 an arrangement for measuring paper quality known, in which the fiber orientation measured optically, the Video images are digitized and through a frequency analysis the digital images a curve for the ratio the fiber shares in the paper running direction and paper cross direction is obtained.
  • the object of the invention is therefore to improve the Setting at least the cross profile of the fiber orientation propose and create an associated arrangement.
  • the object is achieved in that at least the fiber orientation is continuously quantitatively measured and to control the cross profile of the fiber orientation via the Paper web used in the operation of a paper machine the cross profile of the fiber orientation is independent is influenced by the cross section of the basis weight. Possibly in addition to the fiber orientation at the same time Formation, opacity, basis weight and / or shrinkage measured and their cross profiles determined.
  • a measuring head traversing over the paper web is used, which, in addition to specific sensors, an optical camera having. Such a camera is in particular a so-called CCD camera.
  • the one obtained from the measuring head Signals a control loop for fiber orientation to control the fiber orientation cross profile on the headbox the paper machine operated, such a control loop from a so-called formation controller, a unit for the so-called mapping of the paper web, a controlled system and a unit with associated sensors.
  • 1 denotes a paper web with the Width b, which differs from the headbox one in the figures not shown in detail in the x-direction paper machine moved as the paper travel direction.
  • the width b of the paper web 1 can be between 3 and 10 m and in particular 5 m.
  • the speed of the paper web in the x direction is for example 1500 m / min.
  • the measuring head 10 For capturing cross profiles of certain properties of the Paper web 1 becomes the measuring head 10 over the finished paper web 1 back to a coil immediately before it is wound up moved. The measuring head 10 thus performs one over time t traversing movement. Because of the relative movement of the The measuring head 10 places paper web 1 in the x direction as a whole a zigzag path back on the paper web 1.
  • the measuring head 10 usually contains a plurality of sensors known from the prior art, which are not dealt with in detail here.
  • An optical camera 11 is specifically added to the sensors already present in the measuring head 10.
  • optical camera a so-called CCD camera (c harge c oupled d evice) is advantageously used with electronic memories.
  • the specified properties have the following meanings:
  • the fiber orientation is essential for the degree fiber crosslinking in the paper web. Because the fiber networking determines the strength of the paper web 1, one often tries to on the one hand a good one and on the other hand an even one To achieve fiber cross-linking. In certain cases you would also like a preferred direction for fiber orientation give in order to achieve certain mechanical properties. To do this, the fiber orientation must be local to the individual Paper web 1 can be detected and influenced.
  • FIG. 3 shows a measurement result for a paper web medium fiber orientation shown. It is on the Abscissa of the angle of the fiber orientation and on the The relative frequency is plotted on the ordinate.
  • the angle of 90 ° points in the machine direction (MR) that Angles 0 and 180 ° point in the relevant transverse direction (QR) perpendicular to it.
  • the anisotropy factor results as a ratio of the frequency in the machine direction MR to Frequency in the transverse direction QR. Is the fiber orientation for all angles are the same, the anisotropy factor is 1.
  • the anisotropy factor is> 1; for example 1.5, which means that a preferred direction of Fiber orientation in the running direction of the paper web 1 exists.
  • the degree of Fiber orientation and / or cross-linking by one at the Camera recording determined locally performed pattern recognition. Neural networks, for example, are suitable for this.
  • the formation is the small-scale non-uniform Distribution of the fiber mass in the paper web 1 with in places Accumulation or dilution. In practice can be due to a so-called cloudiness when looking through of the paper in front of a brightly lit surface.
  • the formation can therefore also be optically detected, where there is a connection with the fiber orientation can.
  • Opacity is the translucency of paper. It is determined by a light transmission measurement, where the intensity of what has penetrated through the paper Light is measured. For this measurement is compared the camera 11 on the other paper side of the paper web 1 a light source attached. The latter is over in detail FIG. 2 shows that the measuring head 10 with the camera 11 traversed back and forth and a unit 15 with a light source below the paper web 1 corresponding executes traversing movements.
  • the weight per unit area is the mass per unit area of the paper web 1, this size being given in g / m 2 .
  • the basis weight cross section can also be determined by a light transmission measurement with the camera 11. Usually, the absolute value of the basis weight is not recorded, but only the mean-free course of the basis weight cross profile is reproduced on the basis of the fluctuations in brightness.
  • the shrinkage inevitably arises in papermaking: In the drying area of the paper machine, the Paper mass withdrawn water by the paper web 1 over with Steam heated metal rollers is guided. By drying an uneven shrinkage of the paper web 1 result over its width b. If the actuators for Basis weight and fiber orientation before the drying section the shrinkage undesirably changes the Places of action of these actuators.
  • a regulation of the fiber orientation cross profile on the Paper web 1 requires knowledge of the assignment of each Actuator to its place of action in the finished paper. This Mapping is usually called "mapping". Through the traversing camera 11 can take an overall picture of the entire width of the paper web 1 can be achieved. In stochastic Irregularities on the top of the paper web 1 contains the impression of regular sieve markings.
  • Measuring head 10 with camera 11 results in suitable trained headboxes the opportunity to exactly determined cross profiles independently of each other influence and correct. Now you can choose suitable ones Actuators for specifying the fiber orientation cross profile, that measured according to Figures 1 and 2 and online by Pattern recognition is evaluated, use. The presence of actuators and sensors thus enables Setup of a control device for the relevant cross profile for practical use in paper machines.
  • Figure 4 there is a complete control loop 3 for fiber orientation specifically from a fiber orientation controller 31, a mapping unit 32, an actuator 33, one Control path 34 and a sensor unit 35. These units are only shown schematically (“black boxes”), the signal feedback to the comparison point 30 takes place.
  • the continuous measurement of fiber orientation is one Feedback of the determined cross profile signals and activation to a controller comparison point 30 possible. This is taken into account equally the mapping function of the unit 32 the change in assignment caused by shrinkage of actuator 33 to the related actuator effect.

Landscapes

  • Paper (AREA)
EP95940956A 1994-12-19 1995-12-14 Verfahren zur erfassung und beeinflussung der querprofile bestimmter eigenschaften von papierbahnen und zugehörige anordnung Expired - Lifetime EP0799348B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4445260 1994-12-19
DE4445260 1994-12-19
PCT/DE1995/001791 WO1996019615A1 (de) 1994-12-19 1995-12-14 Verfahren zur erfassung und beeinflussung der querprofile bestimmter eigenschaften von papierbahnen und zugehörige anordnung

Publications (2)

Publication Number Publication Date
EP0799348A1 EP0799348A1 (de) 1997-10-08
EP0799348B1 true EP0799348B1 (de) 1999-05-12

Family

ID=6536248

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95940956A Expired - Lifetime EP0799348B1 (de) 1994-12-19 1995-12-14 Verfahren zur erfassung und beeinflussung der querprofile bestimmter eigenschaften von papierbahnen und zugehörige anordnung

Country Status (5)

Country Link
EP (1) EP0799348B1 (sv)
AT (1) ATE180026T1 (sv)
DE (1) DE59505937D1 (sv)
FI (1) FI972576A (sv)
WO (1) WO1996019615A1 (sv)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19634997C2 (de) 1996-08-30 1999-08-05 Voith Sulzer Papiermasch Gmbh Regeleinrichtung mit einer Sensoren-Mehrzahl
DE19653477C2 (de) * 1996-12-20 1999-04-22 Siemens Ag Verfahren und Vorrichtung zur Prozeßführung bei der Herstellung von Papier
PL337514A1 (en) * 1998-04-23 2000-08-28 Saint Gobain Isover Method of determining fibre structure orientation in mineral fibre substrates
DE19843729A1 (de) 1998-09-24 2000-03-30 Voith Sulzer Papiertech Patent Verfahren und Vorrichtung zur Verbesserung des Schrumpfungs-Querprofils
GB2342457A (en) * 1998-10-07 2000-04-12 John Clark A quality control sampling system with barcode reader and video camera
US6799083B2 (en) * 2002-02-21 2004-09-28 Abb Inc. On-line fiber orientation closed-loop control

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI75887C (sv) * 1986-12-30 1991-03-06 Antti Johannes Niemi Förfarande och apparatur för kontroll av torrlinjen på planvirapappers maskin
DE3827084C1 (sv) * 1988-08-10 1989-11-16 Sulzer-Escher Wyss Gmbh, 7980 Ravensburg, De
FI85731C (sv) * 1989-06-01 1997-08-20 Valmet Paper Machinery Inc Reglersystem i en pappers- eller kartongmaskin
JPH0337556A (ja) * 1989-07-05 1991-02-18 Mitsubishi Heavy Ind Ltd 紙質測定装置
FI81848C (sv) * 1989-07-17 1990-12-10 Valmet Paper Machinery Inc Förfarande för reglering och on-line mätning av fiberorienteringen av en bana som framställs på en pappersmaskin
DE4005281C2 (de) * 1990-02-20 1995-04-06 Schultz Hans Joachim Dr Ing Stoffauflauf mit Regelung des Flächengewicht-Querprofiles über die Verdünnung der Fasersuspension
DE4008282A1 (de) * 1990-03-15 1991-09-19 Voith Gmbh J M Massnahmen zur erfassung der schrumpfung oder dehnung von warenbahnen
FI88182C (sv) * 1991-05-23 1993-04-13 Antti Johannes Niemi Förfarande och anordning för kontroll av torrlinjen och för på torrlin jen baserad reglering i en planvirapappersmaskin
DE4221031C2 (de) * 1992-06-26 1995-08-24 Voith Gmbh J M Einrichtung zur Dickenmessung von dünnen fortbewegten Substraten

Also Published As

Publication number Publication date
DE59505937D1 (de) 1999-06-17
WO1996019615A1 (de) 1996-06-27
FI972576A0 (sv) 1997-06-17
EP0799348A1 (de) 1997-10-08
FI972576A (sv) 1997-06-17
ATE180026T1 (de) 1999-05-15

Similar Documents

Publication Publication Date Title
DE3780835T2 (de) Vorrichtung und verfahren zur regelung der trockenlinie auf dem tuch einer papiermaschine vom typ fourdrinier.
DE69105199T2 (de) Bestimmungen der zellenantwort eines betätigungselementes und dessen abbildung.
DE69314155T2 (de) Verfahren und Vorrichtung zur Überwachung der Kante einer sich bewegenden Bahn
EP0450564B1 (de) Verfahren und Vorrichtung zum Führen eines Faserkabels
DE60313300T2 (de) On-line regelung der faserorientierung mit geschlossenem regelkreis
EP0894895B1 (de) Verfahren und Vorrichtung zur Erkennung und Korrektur einer Faserorientierungs-Querprofil-Veränderung
DE3827084C1 (sv)
EP0799348B1 (de) Verfahren zur erfassung und beeinflussung der querprofile bestimmter eigenschaften von papierbahnen und zugehörige anordnung
DE102008039025A1 (de) Verfahren zum berührungslosen Messen der Geschwindigkeit und/oder der Länge eines in Längsrichtung bewegten Strangs, insbesondere eines Kabels
EP1100989B1 (de) Verfahren und vorrichtung zur beurteilung von fehlern in textilen flächengebilden
EP0898014A2 (de) Vorrichtung und Verfahren zur Steuerung oder Regelung des Flächengewichts einer Papier- oder Kartonbahn
EP0670058B1 (de) Verfahren zur stellgliedidentifizierung bei der querprofil-regelung einer kontinuierlich erzeugten materialbahn
DE4492654B4 (de) Verfahren zur Fehlerdiagnose in einem Herstellungsprozess eines synthetischen Fadens
EP0803011B1 (de) Verfahren und einrichtung zur ermittlung der auswirkung der verstellung von stellgliedern
DE69026873T2 (de) Verfahren zur Regelung und On-Line-Messung der Faserorientierung einer Bahn, gemacht auf einer Papiermaschine
DE19634996C2 (de) Stoffdichtegeregelter Stoffauflauf mit Papierstoffkonsistenzregelung
DE3609845A1 (de) Verfahren und vorrichtung zur musterbildung bei einer webmaschine
WO2018072768A1 (de) Messvorrichtung und verfahren zum messen/inline-mustererkennen einer zwei- oder dreidimensionalen folientopografie
DE69029461T2 (de) Verfahren zur messung und kontrolle von texturen.
DE3822566A1 (de) Verfahren zur herstellung eines optischen kabels
DE19640023A1 (de) Verfahren und Vorrichtung zur Verzugskorrektur
EP1161595A1 (de) Verfahren zum betreiben einer maschine zur herstellung und/oder veredelung von materialbahnen
EP0903657A1 (de) Messverfahren zur Bestimmung des Feuchtigkeitsgehaltes einer Faserstoffbahn
DE4024302A1 (de) Verfahren und vorrichtung zur ueberwachung der schlichte-verkapselung eines garnes auf einer schlichtmaschine
DE4008366A1 (de) Verfahren und system zum bestimmen der ausrichtung von fasern

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 19970701

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE CH DE DK ES FR GB GR IE IT LI NL PT SE

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

17Q First examination report despatched

Effective date: 19980504

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE CH DE DK ES FR GB GR IE IT LI NL PT SE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 19990512

Ref country code: IT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.

Effective date: 19990512

Ref country code: GR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19990512

Ref country code: GB

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 19990512

Ref country code: FR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 19990512

Ref country code: ES

Free format text: THE PATENT HAS BEEN ANNULLED BY A DECISION OF A NATIONAL AUTHORITY

Effective date: 19990512

REF Corresponds to:

Ref document number: 180026

Country of ref document: AT

Date of ref document: 19990515

Kind code of ref document: T

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

Free format text: GERMAN

REF Corresponds to:

Ref document number: 59505937

Country of ref document: DE

Date of ref document: 19990617

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: PT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 19990812

Ref country code: DK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 19990812

EN Fr: translation not filed
GBV Gb: ep patent (uk) treated as always having been void in accordance with gb section 77(7)/1977 [no translation filed]

Effective date: 19990512

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19991231

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19991231

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19991231

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
BERE Be: lapsed

Owner name: SIEMENS A.G.

Effective date: 19991231

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: IE

Payment date: 20031111

Year of fee payment: 9

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20041214

REG Reference to a national code

Ref country code: IE

Ref legal event code: MM4A

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: AT

Payment date: 20101110

Year of fee payment: 16

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 20101207

Year of fee payment: 16

REG Reference to a national code

Ref country code: SE

Ref legal event code: EUG

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20111215

REG Reference to a national code

Ref country code: AT

Ref legal event code: MM01

Ref document number: 180026

Country of ref document: AT

Kind code of ref document: T

Effective date: 20111214

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20111214

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20130218

Year of fee payment: 18

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 59505937

Country of ref document: DE

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 59505937

Country of ref document: DE

Effective date: 20140701

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20140701