EP1274993A1 - Verfahren und vorrichtung zur messung der wickelhärte einer papierrolle - Google Patents
Verfahren und vorrichtung zur messung der wickelhärte einer papierrolleInfo
- Publication number
- EP1274993A1 EP1274993A1 EP01937988A EP01937988A EP1274993A1 EP 1274993 A1 EP1274993 A1 EP 1274993A1 EP 01937988 A EP01937988 A EP 01937988A EP 01937988 A EP01937988 A EP 01937988A EP 1274993 A1 EP1274993 A1 EP 1274993A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- paper
- paper roll
- ultrasound
- sound
- face
- 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
Links
- 238000004804 winding Methods 0.000 title claims abstract description 31
- 238000000034 method Methods 0.000 title claims description 31
- 238000005259 measurement Methods 0.000 title claims description 8
- 238000002604 ultrasonography Methods 0.000 claims abstract description 29
- 230000008878 coupling Effects 0.000 claims description 13
- 238000010168 coupling process Methods 0.000 claims description 13
- 238000005859 coupling reaction Methods 0.000 claims description 13
- 238000013016 damping Methods 0.000 claims description 6
- 230000005540 biological transmission Effects 0.000 claims description 5
- 238000006073 displacement reaction Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 claims description 2
- 238000011156 evaluation Methods 0.000 claims description 2
- 230000010363 phase shift Effects 0.000 claims description 2
- 238000005452 bending Methods 0.000 claims 1
- 230000002452 interceptive effect Effects 0.000 abstract 2
- 230000005855 radiation Effects 0.000 description 7
- 238000007906 compression Methods 0.000 description 3
- 230000006835 compression Effects 0.000 description 3
- 238000011835 investigation Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000005520 cutting process Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000007542 hardness measurement Methods 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
- 238000012886 linear function Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000010399 physical interaction Effects 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000003908 quality control method Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/04—Analysing solids
- G01N29/11—Analysing solids by measuring attenuation of acoustic waves
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/04—Analysing solids
- G01N29/07—Analysing solids by measuring propagation velocity or propagation time of acoustic waves
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/22—Details, e.g. general constructional or apparatus details
- G01N29/223—Supports, positioning or alignment in fixed situation
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/02—Indexing codes associated with the analysed material
- G01N2291/023—Solids
- G01N2291/0231—Composite or layered materials
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/02—Indexing codes associated with the analysed material
- G01N2291/023—Solids
- G01N2291/0237—Thin materials, e.g. paper, membranes, thin films
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/02—Indexing codes associated with the analysed material
- G01N2291/028—Material parameters
- G01N2291/02827—Elastic parameters, strength or force
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/04—Wave modes and trajectories
- G01N2291/042—Wave modes
- G01N2291/0422—Shear waves, transverse waves, horizontally polarised waves
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/10—Number of transducers
- G01N2291/102—Number of transducers one emitter, one receiver
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/10—Number of transducers
- G01N2291/106—Number of transducers one or more transducer arrays
Definitions
- the invention relates to a method for measuring the winding hardness of a paper roll by evaluating physical interaction effects between individual paper layers of the paper roll.
- the invention also relates to an associated device.
- the roll hardness build-up of a roll is essentially determined by the history of the tension application when winding the paper web. If, for example, outer layers are wound very tightly on a roll over relatively loosely loosely wound inner layers, the outer layers can bind the inner layers together, which leads to folds in the winding structure. When such a roll rolls off quickly on a printing press, the paper web can then tear.
- the tension history of a paper roll is often not sufficient to assess the winding hardness, because data are only inaccurate or missing or implementation processes within the roll have changed the tension conditions compared to the condition immediately after winding. The winding hardness must then be checked again. Regardless of this, a winding hardness measurement in the course of a final or stand-alone quality control can be of great importance.
- the needle method and the strip method are known as roll-sustaining method with 'the radial resolution of the prior art.
- the needle method (“Smith needle”)
- a calibrated needle is inserted between the pa- pressed layers.
- the degree of penetration of this needle is used as a measure of the winding hardness of the roll at this point.
- the strip method strips are inserted between the layers of paper during the winding process of the roll, which are then pulled out later.
- the force required for this extraction serves as a measure of the winding hardness at the point in question.
- both methods sometimes require several hours of manual work per recorded winding hardness profile.
- the object of the invention is to provide a suitable method with which the winding hardness can be determined in a simple manner over an entire paper roll, and to create the associated device.
- the invention provides a surprisingly simple way of determining the winding hardness over the entire radius of a paper roll without destroying it.
- extensive theoretical investigations were carried out and practical tests were carried out. As he- The result was a functional device for practical use in paper mills.
- FIG. 1 shows the principle of determining the hardness of a paper roll by irradiating ultrasound into it
- FIG. 2 shows the irradiation of ultrasound into the roll face via a transducer with a wedge-shaped matching layer
- FIG. 3 shows a normal transducer arrangement in which the radiation into the face of the roll occurs via a transducer that is deflected normally to the surface
- FIG. 4 shows two alternatives for shear transducers the end of the roll with two deflected tangentially to the surface and parallel or perpendicular to the measuring section
- FIG. 5 two alternative forms of realization for shear oscillator configurations
- FIG. 6 alternatives for the formation of coupling surfaces
- FIG. 7 the geometry when coupling L and SV waves or SH waves
- FIG. 8 an array arrangement
- FIG. 9 shows a concrete realization of a measuring head for the determination of the winding hardness with ultrasound.
- a spring-mass model can be used to explain this behavior.
- the adiabatic compressibility is always used to calculate the speed of sound.
- a paper roll is designated 1. Such paper rolls are one result of paper making
- Paper machine with subsequent winding into so-called reels, unwinding and cutting to predetermined lengths and widths, for example with a width of 1 m and a diameter of 2 m, after rewinding.
- Individual paper layers 23 are shown on the end face 2 of the roll 1.
- a measuring device 10 is attached, which consists of an ultrasonic transmitter 11 and an ultrasonic receiver 12.
- the winding hardness profile of roll 1 is to be determined by radially displacing the measuring device on the end face of the roll.
- the proposed method assumes that the winding hardness determined on the roll end face 2 at a certain distance from the roll axis is also representative of the winding hardness of other stacked paper layers lying further inside the roll at this center distance. This assumption is also the basis of the needle method mentioned at the beginning.
- the coupling-in can advantageously take place in such a way that the highest possible proportion of the sound field is emitted perpendicular to the paper layers, which then moves tangentially to the surface through the paper and can be coupled out again with a correspondingly high degree of efficiency.
- the following procedures are distinguished:
- FIG. 2 shows a transceiver 20, in which the radiation of the ultrasound into the end face 2 of the roller via a transducer element
- Tangential sound coupling via the wedge 22 requires a wedge material that has a lower longitudinal sound velocity c ⁇ than the paper with the sound velocity c P.
- the angle between the transducer axis and the desired tangential radiation vector must comply with the ArcSin [c P / c ⁇ ] condition in order to obtain tangential radiation according to arrow 24 in the paper.
- Speed of sound is used in paper Waves of type L (longitudinal waves) or SV (vertically polarized shear waves, _Shear Vertical) excited.
- the low demands on the transducer 20 are advantageous in the arrangement according to FIG. 2. Intensive and directed waves are generated parallel to the paper surface. However, suitable materials must be selected in the range of the necessary low longitudinal sound velocity c ⁇ .
- FIG. 3 shows an ultrasonic transducer 30 with a normal oscillator arrangement and radiation into the roller end face 2, which is made possible by the transducer which can be deflected normally to the end face according to the arrows 31. This is an easy to implement
- the robust coupling to the paper is advantageous because only forces perpendicular to the paper surface have to be transmitted.
- the sound waves emitted parallel to the paper surface consist of L components and - thanks to the frictional connection of the paper webs - SV components, but overall they have only a relatively low intensity.
- FIG. 4 shows an ultrasound transducer 40 with ultrasound radiation via Scherschwinger in the roller end face 23.
- the transducer 40 swings with its effective edge 41 right and left perpendicular to the paper layers 23, in the partial figure 4b with the edge forward and backward parallel to the paper layers 23.
- the reception of the acoustic Waves occur to the left or right of converter 40.
- V SD rt P- CD V o ⁇ O: _---. SD * Q ⁇ P- - _—. rt P- & d ⁇ P- 3 i ⁇ l 0 0 c ⁇ ⁇ CD H ⁇ - ⁇ CD 3 0 CD CD * ⁇ _ ! 1 ⁇ -i SD ⁇ CD ⁇ P- 0 O o SD ⁇ i PJ 0 3 ⁇ • ö Hi ⁇ Q
- a converter group 81, 83, 85, ... are switched as a transmitter and a converter group 82, 84, 86, ... as a receiver.
- phase difference between the activated transducers must be matched to the transducer distance and the speed of sound in the paper.
- the phase shift is advantageously set in proportion to the spatial coordinate along the measuring path of the paper roll. A proportionality factor is selected in such a way that the transmission of the ultrasound in the direction of the measuring section is maximized.
- a measuring head 100 in this regard is shown in FIG. 9.
- the measuring head 100 is used to measure the speed of sound on the face 2 of the paper roll and has two ultrasound transducers 110 and 120, which are preferably designed as shear transducers. Shields 115 and 117 against acoustic and electrical crosstalk are arranged between the two transducers 110 and 120 serving as transmitters or receivers ,
- the essential parameters of the device according to FIG. 9 were examined in detail in a measuring arrangement according to FIG. 1, a suitable course of the signal occurring at the receiving transducer being obtained as a measure of the winding hardness of a paper roll. The first zero crossing after evaluation of the acoustic signal at the receiver is evaluated.
- the mechanical structure of the measuring head 100 contains in detail a tensioning device 101, by means of which a PVC block 105 is held via compression springs 102 and 103.
- a first shear transducer 110 and a second shear transducer 120 are attached to the PVC block 105 in an electrically insulated manner via rubber layers 106 and 107. transmitter and the other serves as an ultrasound receiver.
- the aforementioned shield 115 for eliminating airborne noise is located between the two transducers.
- a copper mesh 116 and the metal body 117 serve for electrical shielding.
- the measuring head described in this way is placed on the end face 2 of the paper roll 1, as shown by way of example in FIG. 1, a suitable radial position being manually specified for each measurement.
- the 7 shields prevent electrical and acoustic crosstalk during the measurement.
- the shear transducers are slightly tilted against each other in order to comply with the transmission and reception conditions, for which purpose compensation layers may be present.
- the measuring head 100 according to FIG. 9 can also be introduced into a suitable slide as a displacement device, so that it can be displaced radially on the end face 2 of the paper roll 1.
- the measuring head 100 was built as a prototype and successfully used for measurements on paper rolls.
- the characteristic parameters result from the experimental investigations. With the measuring head 100, a signal run was determined, from which the winding hardness of a paper roll can be determined reproducibly. This creates a valuable tool for practical use in paper mills.
Landscapes
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Acoustics & Sound (AREA)
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10019497A DE10019497C2 (de) | 2000-04-19 | 2000-04-19 | Verfahren und Vorrichtung zur Messung der Wickelhärte einer Papierrolle |
| DE10019497 | 2000-04-19 | ||
| PCT/DE2001/001490 WO2001079832A1 (de) | 2000-04-19 | 2001-04-17 | Verfahren und vorrichtung zur messung der wickelhärte einer papierrolle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP1274993A1 true EP1274993A1 (de) | 2003-01-15 |
Family
ID=7639380
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP01937988A Ceased EP1274993A1 (de) | 2000-04-19 | 2001-04-17 | Verfahren und vorrichtung zur messung der wickelhärte einer papierrolle |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US20030230140A1 (de) |
| EP (1) | EP1274993A1 (de) |
| DE (1) | DE10019497C2 (de) |
| WO (1) | WO2001079832A1 (de) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE20211294U1 (de) | 2002-07-26 | 2002-11-07 | Dewert Antriebs- und Systemtechnik GmbH & Co KG, 32278 Kirchlengern | Sende-/Empfangseinheit |
| DE10215197B4 (de) * | 2002-04-05 | 2005-09-29 | Siemens Ag | Verfahren zur Bestimmung der Wickelhärte einer gewickelten Rolle sowie Vorrichtung hierfür |
| WO2006003262A1 (en) * | 2004-07-01 | 2006-01-12 | Metso Paper, Inc. | A reeling method and system as well as an measuring apparatus |
| DE102007057696A1 (de) * | 2007-11-30 | 2009-06-10 | BAM Bundesanstalt für Materialforschung und -prüfung | Vorrichtung und Verfahren zur Detektion von Verbundstörungen |
| DE102007060916B3 (de) * | 2007-12-14 | 2009-06-25 | Kba-Metronic Ag | Vorrichtung und Verfahren zur Messung der Siebspannung des Siebgewebes in einem Siebrahmen |
| DE102012110790B4 (de) | 2012-11-09 | 2017-04-27 | Windmöller & Hölscher Kg | Verfahren für die Bestimmung der Wickelqualität eines Folienwickels |
| US10036733B2 (en) * | 2015-04-13 | 2018-07-31 | Zf Friedrichshafen Ag | Hardness verification utilizing ultrasonic velocities |
| DE102018217071B4 (de) * | 2018-10-05 | 2024-05-16 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Vorrichtung und Verfahren zur Bestimmung einer Wickelhärte in einer Wickelrolle |
| CN112161735B (zh) * | 2020-10-26 | 2022-01-04 | 重庆宏劲印务有限责任公司 | 卷盘彩色框架纸缠绕张力智能检测装置 |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3512400A (en) * | 1967-04-13 | 1970-05-19 | Panametrics | Ultrasonic testing method |
| US3720098A (en) * | 1971-03-22 | 1973-03-13 | Atomic Energy Commission | Ultrasonic apparatus and method for nondestructively measuring the physical properties of a sample |
| US4774842A (en) * | 1986-02-19 | 1988-10-04 | Mcdonnell Douglas Corporation | Hand-held apparatus to nondestructively test subsurface structure |
| US5535627A (en) * | 1994-01-14 | 1996-07-16 | The Board Of Regents Of Oklahoma State University | Roll structure acoustic gage and method |
| US6036137A (en) * | 1998-12-17 | 2000-03-14 | Valmet-Karlstad Ab | Apparatus and method for winding paper |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5398538A (en) * | 1993-01-28 | 1995-03-21 | Abb Industrial Systems Inc. | On-line measurement of ultrasonic velocities in web manufacturing processes |
| EP0724724B1 (de) | 1993-10-22 | 2000-05-31 | Amcor Limited | Feststellung der festigkeit von schichtmaterialien durch ultraschallprüfung |
| SE504575C2 (sv) * | 1994-10-06 | 1997-03-10 | Lorentzen & Wettre Ab | Anordning för ultraljudsmätning av elastiska egenskaper hos en pappersbana i rörelse |
| SE504576C2 (sv) | 1994-10-06 | 1997-03-10 | Lorentzen & Wettre Ab | Anordning för att med ultraljud mäta de elastiska egenskaperna hos en pappersbana i rörelse |
| DE19821318A1 (de) * | 1998-05-13 | 1999-11-25 | Voith Sulzer Papiertech Patent | Verfahren zum Überwachen der Wickelhärte einer Wickelrolle |
-
2000
- 2000-04-19 DE DE10019497A patent/DE10019497C2/de not_active Expired - Lifetime
-
2001
- 2001-04-17 EP EP01937988A patent/EP1274993A1/de not_active Ceased
- 2001-04-17 WO PCT/DE2001/001490 patent/WO2001079832A1/de not_active Ceased
-
2002
- 2002-10-18 US US10/273,833 patent/US20030230140A1/en not_active Abandoned
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3512400A (en) * | 1967-04-13 | 1970-05-19 | Panametrics | Ultrasonic testing method |
| US3720098A (en) * | 1971-03-22 | 1973-03-13 | Atomic Energy Commission | Ultrasonic apparatus and method for nondestructively measuring the physical properties of a sample |
| US4774842A (en) * | 1986-02-19 | 1988-10-04 | Mcdonnell Douglas Corporation | Hand-held apparatus to nondestructively test subsurface structure |
| US5535627A (en) * | 1994-01-14 | 1996-07-16 | The Board Of Regents Of Oklahoma State University | Roll structure acoustic gage and method |
| US6036137A (en) * | 1998-12-17 | 2000-03-14 | Valmet-Karlstad Ab | Apparatus and method for winding paper |
Non-Patent Citations (2)
| Title |
|---|
| KOENIG R: "ZUR BESCHRÄNKUNG DES ANSPRUCHSINHALTS DURCH BAR-DERIVATE", MITTEILUNGEN DER DEUTSCHEN PATENTANWAELTE, 1 January 1997 (1997-01-01), pages 62, XP001248632, ISSN: 0026-6884 * |
| See also references of WO0179832A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2001079832A1 (de) | 2001-10-25 |
| DE10019497A1 (de) | 2001-10-31 |
| US20030230140A1 (en) | 2003-12-18 |
| DE10019497C2 (de) | 2002-03-21 |
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