WO2010086047A1 - Procédé et dispositif d'identification d'une déchirure d'une bande de matériau - Google Patents

Procédé et dispositif d'identification d'une déchirure d'une bande de matériau Download PDF

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Publication number
WO2010086047A1
WO2010086047A1 PCT/EP2009/065976 EP2009065976W WO2010086047A1 WO 2010086047 A1 WO2010086047 A1 WO 2010086047A1 EP 2009065976 W EP2009065976 W EP 2009065976W WO 2010086047 A1 WO2010086047 A1 WO 2010086047A1
Authority
WO
WIPO (PCT)
Prior art keywords
web
setpoint
speed controller
drive unit
machine
Prior art date
Application number
PCT/EP2009/065976
Other languages
German (de)
English (en)
Inventor
Johannes Starkl
Alexander Stukenkemper
Original Assignee
Siemens Aktiengesellschaft
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 Aktiengesellschaft filed Critical Siemens Aktiengesellschaft
Priority to CN200980155747.1A priority Critical patent/CN102301069B/zh
Priority to EP09795360.8A priority patent/EP2384379B1/fr
Publication of WO2010086047A1 publication Critical patent/WO2010086047A1/fr

Links

Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F7/00—Other details of machines for making continuous webs of paper
    • D21F7/04—Paper-break control devices
    • 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 method and a device for detecting a tear of a web in a machine for producing and / or processing the web.
  • machines for the production and / or processing of webs of paper, cardboard, plastic film, metal foil, textiles or composites comprising Two or more of these materials include paper machines, printing machines, calenders, rotary die-cutting machines, rotary cutting machines, and the like.
  • Methods and devices for detecting a tear of a web in a machine for producing and / or processing the web are already known, for example, from DE 42 16 653 A1, where the web is a paper web and the machine is a paper machine.
  • the paper machine has a press section and a dryer section with a plurality of dryer groups, wherein the paper web is wound up after passing through the dryer section.
  • a light barrier can be used as a device for detecting a tear of the paper web whose light beam is directed onto the paper web.
  • the functional principle of the light barrier is that the interruption of the light path caused by the paper web is registered in the direction of an optical sensor.
  • DE 42 16 653 Al proposes to arrange demolition detectors in the dryer section to identify a tear of the paper web in the dryer section, in which the paper web is arranged above a dryer felt.
  • An interruption detector has a transmitting / receiving unit, wherein the transmitting unit radiates visible light onto the paper web.
  • the receiving unit receives the light reflected at the paper web, which is decomposed into standardized red, green and blue light values and, if appropriate, brightness values.
  • the object is achieved for the method for detecting a tear of a web in a machine for producing and / or processing the web, wherein the machine comprises at least one drive unit for transporting the web with at least one speed controller by a history of drive data and a course of a a setpoint speed-determining setpoint value is detected at the at least one speed governor and, upon detection of a specific increase in the drive data and simultaneous maintenance of the setpoint value, an outline of the material line is detected.
  • the object is achieved for the device for detecting a tear of a material web in a machine for producing and / or processing the material web, wherein the machine comprises at least one drive unit for transporting the material web with at least one rotational speed controller, by direction at least one evaluation unit for detecting a course of drive data and a course of a desired speed determining setpoint on the at least one speed controller, wherein the at least one evaluation unit is set, upon detection of a certain increase of drive data and simultaneously determining a maintenance of the setpoint one Detecting demolition of the web.
  • An "increase of drive data” generally means a positive as well as a negative increase of drive data values.
  • the method according to the invention and the device according to the invention operate without the use of optical sensor systems. This eliminates costly cleaning or maintenance and thus usually connected machine downtime.
  • signals which can be tapped at a speed controller of a drive unit, now tapped and used to detect a demolition of a web immediately and without time delay are signals which can be tapped at a speed controller of a drive unit, now tapped and used to detect a demolition of a web immediately and without time delay.
  • a setpoint speed-determining setpoint for example, the setpoint speed itself or a setpoint speed, etc. can be tapped on the speed controller.
  • the device can be implemented with little effort on existing machines. Only a separate tap of signals of an existing on a drive unit speed controller and a corresponding processing of the tapped signals, optionally continue to provide a way to trigger further actions in detecting a tear of the web, such as a stop of the machine or at least parts of the machine, an output a warning signal, etc. are required.
  • a drive unit is understood as meaning, for example, a roller, a roller, a drive belt, a clamping device and the like.
  • a clamping device is, for example, a pair of counter-rotating rollers, rollers, conveyor belts and the like with a gap therebetween, the web being clamped in the clamping device and conveyed through the gap.
  • the speed controller controls the speed of the drive unit by means of the setpoint to a desired setpoint speed.
  • Methods and devices for controlling drive units by means of speed regulators are already known, for example, from DE 10 2007 003 695 A1.
  • the set rotational speed of a drive unit has a direct influence on a transport speed of the web of material passing by the drive unit and thus further transported.
  • a controller type comprising an I-element is preferably used, in particular a PI controller.
  • the device according to the invention can be used in particular for carrying out the method according to the invention.
  • the method for one or each drive unit comprises the following steps: detecting first drive data ADi and a first setpoint SWi at the at least one speed controller of the respective drive unit at time t n ;
  • a first signal Si and in the case of D 2 O a second signal S 2 is generated, wherein in the presence of the first signal Si and simultaneously the second signal S 2, the outline the web is reliably detected.
  • an increase in the values of the drive data can be determined if a scraper movement of a scraper on a drive unit or a change in the setpoint speed of the material web or the setpoint speed of the
  • Output unit is present. If such occurs, then in one or each drive unit a certain increase in the drive data can be detected, which is similar to a characteristic increase in the case of an outline of the material web. A malfunction and unnecessary machine downtime is thus reliably prevented by excluding the occurrence of a break when Di ⁇ G and / or D 2 > 0 is detected. Practical experience and simulations have shown that, in contrast to scraper movements, a tear in a material web also has an immediate effect on any neighboring drive units that may be present.
  • the limit value G for each drive unit is generally a constant and time-independent value and must be determined individually for each type of drive data to be evaluated as well as each drive unit or must be determined in preliminary tests.
  • drive data AD in the form of torque setpoints DMS or current consumption values or actual speeds come into question.
  • a torque is determined via a current measurement of the torque-generating current.
  • the at least one evaluation unit of the device according to the invention is accordingly designed, in particular, to record a profile of drive data in the form of torque setpoints DMS, current consumption values or actual rotational speeds.
  • a particularly reliable detection of a tear of the web allows the detection of drive data in the form of torque setpoints DMS.
  • a profile of the torque setpoint DMS and a profile of the setpoint value are detected at the at least one speed controller and, upon detection of a specific increase in the torque setpoint DMS and simultaneous maintenance of the setpoint value, the tearoff of the material line is detected.
  • a control value in particular an I-component or a P-component, at an output of the respective speed controller, in particular a PI controller, is detected as torque setpoint DMS.
  • the I component is preferred as a control value since no amplification of the signal noise due to the P component of the rpm controller and thus the I component is less noisy.
  • Detecting a first torque setpoint DMSi and a first setpoint SWi at the at least one speed controller of the respective drive unit at time t n ; Detecting a second torque setpoint DMS 2 and a second setpoint SW 2 at the at least one speed controller of the respective drive unit at a time t n + i; Forming a first difference Di from DMSi and DMS 2 and comparing Di with a threshold G; Forming a second difference D 2 from SWi and SW 2 ; wherein in the case of Di> G and D 2 O the demolition of the web is detected.
  • the method according to the invention and the device according to the invention can advantageously be used on a drive unit or on selected drive units or on any drive unit with speed controller present on the machine.
  • the same or different types of drive data can be evaluated at different drive units. It is generally advantageous if the machine has at least two drive units, each with at least one speed controller, that the process for detecting the tear of the web on at least two of the existing drive units is performed. This enormously increases the security of the detection of a demolition and also allows its localization.
  • a machine accordingly has at least one first drive unit with at least one first speed controller and at least one further drive unit with at least one further speed controller, it is advantageous if a profile of drive data and a profile of a desired value SW determining a set speed DZS on the at least a first speed controller and further detected at the at least one further speed controller, wherein upon detection of a certain increase of drive data and simultaneously maintaining the setpoint on the first speed controller as well as on the other speed controller, the demolition of the car track is detected and continue a position of the demolition of the Web in the area between the at least one first drive unit and the at least one further drive unit is detected.
  • the change in the drive data is the stronger the closer a drive unit is to the demolition of the material web. Accordingly, it is particularly preferred to monitor all existing drive units, so that the position of a demolition can be clearly located and assigned to one or two drive units.
  • the method according to the invention is used to detect a tear on a web of paper, cardboard, foil, textile material or the like.
  • a paper machine may comprise, for example, 30 or more drives in the dryer groups.
  • the machine has at least two drive units, each with at least one speed controller, it has proved to be advantageous if the device has only one evaluation unit, which is suitable for two or more drive units. units and thus cost-effective. However, it is just as possible to provide the device with at least one evaluation unit per drive unit.
  • At least one visual and / or audible warning signal is generated.
  • the warning signal can only be used to alert the operator of the machine to the demolition.
  • the warning signal can also be used to stop the machine or to take other actions, e.g. to prevent damage and / or clogging of the machine with the web.
  • a localization of the break in the machine can be made possible by, for example, a corresponding visual indication of the position of the tear.
  • the device according to the invention preferably comprises at least one dispensing unit which is set up to output an optical and / or audible warning signal upon detection of the tear of the web.
  • an output unit for outputting an acoustic warning signal in particular a horn, bell or the like is used.
  • an output unit for outputting at least one optical warning signal in particular a display, a screen, a warning lamp or the like is used.
  • the at least one output unit can be arranged directly on or next to the machine or else be arranged at a greater distance from the machine and thus enable remote monitoring of the machine.
  • FIGS. 1 to 3 are intended to illustrate an example of a method and a device according to the invention.
  • 1 shows schematically a device together with a drive unit of a machine;
  • FIG. 2 shows a flow chart for the detection of a tear of a material web in a machine with a drive unit
  • FIG. 3 shows a flow chart for detecting a break of a
  • FIG. 1 schematically shows a device 1 for detecting a tear of a material web 100 in a machine for producing and / or processing the material web 100.
  • a drive unit AE of the machine for transporting the material web 100 is shown.
  • the machine is a paper or printing machine which, for example, processes a web 100 in the form of paper, cardboard or film.
  • the drive unit AE comprises a speed controller 3, a drive motor 4 and a clamping device, which is formed from the rollers 5, 6, wherein the rollers 5, 6 rotate in the direction of the arrow about their respective axis of rotation 7, 8.
  • a setpoint generator 2 predefines the speed controller with a desired value SW determining a set speed DZS, the setpoint SW being read out from the device 1 at different times t n , tn + i.
  • the setpoint generator 2 can also be a component of the speed controller 3.
  • the device 1 comprises at least one evaluation unit for detecting the course of the drive data AD and a course of the setpoint SW on the at least one speed controller 3.
  • drive data AD are, for example torque setpoints DMS, current consumption values or actual speeds in question, which can be tapped on the speed controller. All setpoint SW, a desired speed, a desired speed or the like can be tapped off.
  • the speed sensor (3) and the drive motor (4) are part of an indicated by arrows between these control loop.
  • the evaluation unit of the device 1 is set directed, upon detection of a certain increase in the drive data AD, such as the torque setpoint DSM, and simultaneously determining a retention of the setpoint SW, for example, the target speed DZS, a tear R of the web 100 to recognize.
  • the actions now required or desired such as the issuing of a warning signal, a stop of the machine or at least the drive unit AE, etc., can be effected by the device 1.
  • the required output unit and / or interconnection of the device 1 with the machine or drive unit AE are not shown in detail in FIG. 1 for the sake of clarity.
  • FIG. 2 shows a flow chart for detecting a break R of a material web 100 in a machine having a drive unit AE (see FIG. 1), the calculations being carried out by means of the device 1.
  • drive data AD are read into device 1 at successive times t n and tn + i and stored at time t n as ADi and time T n + I as AD 2 .
  • storage is understood here to be a delayed transmission of the value ADi, for example with the aid of a dead time element.
  • a first difference Di of ADi and AD 2 is formed. The first difference Di is then compared with a limit value G determined in advance for the drive unit AE.
  • the branch Y will label.
  • the result of the consideration of the desired value SW is also required. So be in the
  • FIG. 3 shows a further flow chart for the recognition of a tear R of a material web 100 in a machine with more than one drive unit AE (see FIG. 1).
  • a first drive unit AE and at least one further drive unit AEx are thus present on the machine.
  • the drive units AE, AEx are arranged one after the other in the direction of transport of the web 100 (see arrow in FIG. 1), wherein a single device 1 or per drive unit AE, AEx may comprise a device 1.
  • the flowchart shown on the left in FIG. 3 (see left dotted box) relates to the first drive unit AE, while the flowchart shown in FIG. 3 on the right (see right dotted box) relates to the further drive unit AEx.
  • the calculations of the two flowcharts run in the one or more devices 1 (see FIG. 1).
  • the flowchart shown on the left in the image essentially corresponds to that of FIG. 2, with the only difference that, at the end, there is not already a recognition of a tear R of the material web 100, but for the time being only an intermediate result Ri is stored.
  • the intermediate results R i, R are x
  • a demolition R is detected actual and introduced in sequence emergency manoeuvrable or desired actions , If only a value Ri, but no value R x , or only a value R x , but no value Ri is detected, only a value is detected on the drive unit AE or the further drive unit AEx. crack R and the flowcharts are each repeated.
  • results Ri, R2, R3, are included R4 to R x drive unit for each arrival in the detection, whether in fact a demolition R is present.
  • results Ri to R x of adjacent each other and along the transport direction of the web 100 disposed drive units AE recorded separately to an evaluation with regard to the position-of the demolition R of the web to be able to make in a machine 100th
  • FIGS. 1 to 3 merely show exemplary embodiments of the device according to the invention and of the method according to the invention, which a person skilled in the art can easily change on the basis of the above information.
  • a number of drive units may be present, one or more devices may be provided for detecting a tear of a web for a machine, and, for example, the processing of the data in the flow charts may take place by means of different hardware familiar to the person skilled in the art.
  • Use of certain types of drive data, such as torque setpoints DMS, actual speeds, current consumption th etc. is to be realized by a person skilled in a simple manner.

Landscapes

  • Controlling Rewinding, Feeding, Winding, Or Abnormalities Of Webs (AREA)
  • Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
  • Paper (AREA)

Abstract

L'invention concerne un procédé et un dispositif d'identification d'une déchirure d'une bande de matériau dans une machine destinée à fabriquer et/ou traiter la bande de matériau, ne nécessitant pas de système de détection optique. Les données d'entraînement sont évaluées par des unités d'entraînement agencées sur la machine, qui présentent un régulateur de vitesse.
PCT/EP2009/065976 2009-01-30 2009-11-27 Procédé et dispositif d'identification d'une déchirure d'une bande de matériau WO2010086047A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN200980155747.1A CN102301069B (zh) 2009-01-30 2009-11-27 用于识别货物幅面的断裂的方法和装置
EP09795360.8A EP2384379B1 (fr) 2009-01-30 2009-11-27 Procede et dispositif d'identification d'une dechirure d'une bande de materiau

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200910006827 DE102009006827A1 (de) 2009-01-30 2009-01-30 Verfahren und Vorrichtung zur Erkennung eines Abrisses einer Warenbahn
DE102009006827.9 2009-01-30

Publications (1)

Publication Number Publication Date
WO2010086047A1 true WO2010086047A1 (fr) 2010-08-05

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PCT/EP2009/065976 WO2010086047A1 (fr) 2009-01-30 2009-11-27 Procédé et dispositif d'identification d'une déchirure d'une bande de matériau

Country Status (4)

Country Link
EP (1) EP2384379B1 (fr)
CN (1) CN102301069B (fr)
DE (1) DE102009006827A1 (fr)
WO (1) WO2010086047A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011006391A1 (de) * 2011-03-30 2012-10-04 Siemens Aktiengesellschaft Verfahren und Vorrichtung zur Erfassung von Parametern einer durch- oder umlaufenden Materialbahn in einer Materialverarbeitungsmaschine
EP3290582B1 (fr) * 2016-08-29 2019-03-13 Siemens Aktiengesellschaft Procédé de fonctionnement d'une machine destinée a fabriquer et/ou traiter une bande de matériau
EP3699356A1 (fr) * 2019-02-25 2020-08-26 Siemens Aktiengesellschaft Procédé et dispositif de détection d'une déchirure d'un bande de fibre, installation industrielle ainsi que produit programme informatique

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DE10157914A1 (de) * 2001-11-26 2002-08-29 Voith Paper Patent Gmbh Verfahren zur Bahnabrissüberwachung und Maschine zur Durchführung des Verfahrens
EP1795893A1 (fr) * 2005-12-06 2007-06-13 Voith Patent GmbH Méthode pour la détermination d'une propriété de dilatation d'une bande
WO2009059860A1 (fr) * 2007-11-09 2009-05-14 Voith Patent Gmbh Procédé et dispositif de relevé d'une déchirure et/ou d'un module d'élasticité d'une bande de matériau

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GB2178413A (en) * 1985-07-19 1987-02-11 Molins Plc Web transport system
DE4216653C2 (de) 1992-05-20 1995-12-21 Voith Gmbh J M Abrißüberwachungseinrichtung für Papierbahnen
DE4221395C2 (de) * 1992-06-30 2001-08-16 Lothar Goettsching Verfahren zum zerstörungsfreien Bestimmen eines mit der breitenbezogenen Bruchkraft korrelierenden Kennwertes an einer laufenden Papierbahn
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FI111469B (fi) * 1996-12-16 2003-07-31 Metso Paper Inc Menetelmä ja järjestelmä radan irtoamistapahtuman seuraamiseksi
GB2323930B (en) * 1997-03-21 2001-08-29 Univ Hull Testing apparatus
DE10157915A1 (de) * 2001-11-26 2002-07-18 Voith Paper Patent Gmbh Verfahren zur Bahnabrissüberwachung und Maschine zurDurchführung des Verfahrens
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Patent Citations (3)

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Publication number Priority date Publication date Assignee Title
DE10157914A1 (de) * 2001-11-26 2002-08-29 Voith Paper Patent Gmbh Verfahren zur Bahnabrissüberwachung und Maschine zur Durchführung des Verfahrens
EP1795893A1 (fr) * 2005-12-06 2007-06-13 Voith Patent GmbH Méthode pour la détermination d'une propriété de dilatation d'une bande
WO2009059860A1 (fr) * 2007-11-09 2009-05-14 Voith Patent Gmbh Procédé et dispositif de relevé d'une déchirure et/ou d'un module d'élasticité d'une bande de matériau

Also Published As

Publication number Publication date
CN102301069A (zh) 2011-12-28
EP2384379A1 (fr) 2011-11-09
CN102301069B (zh) 2015-05-20
DE102009006827A1 (de) 2010-08-05
EP2384379B1 (fr) 2015-07-29

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