WO1987006334A1 - Dispositif pour mesurer l'epaisseur du papier ou similaire - Google Patents

Dispositif pour mesurer l'epaisseur du papier ou similaire Download PDF

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Publication number
WO1987006334A1
WO1987006334A1 PCT/EP1987/000199 EP8700199W WO8706334A1 WO 1987006334 A1 WO1987006334 A1 WO 1987006334A1 EP 8700199 W EP8700199 W EP 8700199W WO 8706334 A1 WO8706334 A1 WO 8706334A1
Authority
WO
WIPO (PCT)
Prior art keywords
sensor
paper
base
air
bearing bush
Prior art date
Application number
PCT/EP1987/000199
Other languages
German (de)
English (en)
Inventor
Druckmaschinen Aktiengesellschaft Heidelberger
Original Assignee
Blaser, Peter, Theobald
Eiswirth, Peter
GRÜTZMACHER, Bertold
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 Blaser, Peter, Theobald, Eiswirth, Peter, GRÜTZMACHER, Bertold filed Critical Blaser, Peter, Theobald
Publication of WO1987006334A1 publication Critical patent/WO1987006334A1/fr

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B13/00—Measuring arrangements characterised by the use of fluids
    • G01B13/02—Measuring arrangements characterised by the use of fluids for measuring length, width or thickness
    • G01B13/06—Measuring arrangements characterised by the use of fluids for measuring length, width or thickness for measuring thickness
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B13/00—Measuring arrangements characterised by the use of fluids
    • G01B13/02—Measuring arrangements characterised by the use of fluids for measuring length, width or thickness

Definitions

  • the invention relates to a device for measuring the thickness of paper or the like, in which the paper is supported on a base and a movable sensor is provided which is responsive to the position of the surface of the paper, the position of which is detected by a measuring device.
  • the known device has the disadvantage that very high demands are placed on the concentricity of the roll, for example if changes in the thickness of the paper or differences in thickness of different papers of 10 ⁇ m are to be reliably detected. There is also a possibility of error due to a play between the roll and its storage. In addition, the roll can damage the paper surface. Furthermore, it is known from DE-34 35 908 to fasten a sensor, directed towards the surface of the paper to be measured, which is also spaced from the surface of the paper to be measured by an air cushion, to a spring element. The spring element itself is on one
  • Vibrations occur which can falsify the measurement result.
  • the cable attached directly to the sensor for signal transmission has a negative effect on the measuring accuracy, since the cable also vibrates during the measurements. Changes in this cable routing (longer or shorter cable, stronger or weaker bending of the cable) have a direct effect on the measurement behavior or the measurement result; so that it is inevitable to readjust the sensor with the smallest change in the cable.
  • the invention has for its object to provide a device of the type described, in which the possibility of damage to the paper surface is further reduced and in which the sensor without interference, as directly connected to the sensor
  • Device parts can arise, can adapt relatively to the paper to be measured.
  • a device for producing an air cushion is provided on the top of the paper and in that the sensor is designed and arranged such that it is carried by the air cushion.
  • the air cushion builds up on the base; if there is subsequently paper on the base, the area delimiting the underside of the air cushion is higher in accordance with the paper thickness, and the air cushion is thus able to raise the sensor higher than if the paper were not present; the difference in the height of the sensor is a function of the paper thickness, the changes in the height of the sensor corresponding exactly to the changes in the thickness of the paper in the ideal case, which is present in the embodiment described below.
  • a special embodiment of the subject matter of the invention provides a bearing bush which is closed on one side and is firmly connected to the machine frame, into whose opening directed towards the base a bearing journal, which is designed as a sensor, can be inserted and moved vertically within the bearing bush without friction.
  • Air cushions are understood here to mean a structure that requires a constant supply of air and is not limited on all sides by physical walls. It is conceivable to generate the air cushion by at least one nozzle integrated in the sensor.
  • the part referred to here as the sensor which could also be called a float because it floats on or is supported by the air cushion, is used in the preferred embodiment of the invention to generate the air cushion itself and in this case is formed by an air nozzle.
  • the change in the height of the sensor relative to the base is registered by a measuring system integrated in the base, which determines the respective distance between the base and the sensor, and is passed on to an electronic evaluation device.
  • the measuring system can preferably be an inductive displacement transducer, such as that sold by "Baumer electric”, Fettfeld / Switzerland, under the designation IWA 18 U 9003.
  • the flush installation of the travel meter with the base advantageously makes it possible to dispense with a mechanical adjustment device, since the base represents a defined reference point.
  • the device consists of a bearing bush 1 closed on one side, which is firmly connected to the machine frame is, the bearing bush 1 is directed to the base 6 with the open side.
  • a connection for the air supply by means of a hose 5 is provided on the closed side of the bearing bush 1, a connection for the air supply by means of a hose 5 is provided on the closed side of the bearing bush 1, a connection for the air supply by means of a hose 5 is provided.
  • the air supplied via the hose 5 is directed into a channel system 3 integrated in the wall of the bearing bush 1, which in turn releases the air into the interior of the bearing bush 1 provided for the bearing journal.
  • a bearing pin which is designed as a sensor 2, is movably introduced in the interior of the bearing bush 1 and is surrounded by part of the air flowing out of the channel system of the bearing bush 1 within the bearing bush 1.
  • at least one compensating bore 9 is arranged in the region of the closed side of the bearing bush 1.
  • the further part of the air flowing out of the channel system 3 of the bearing bush 1 opens into the channel system 4 integrated in the sensor 2 and is expelled by it perpendicular to the base, whereby an air cushion is created under the sensor 2.
  • the sensor 2 can move in the bearing bush 1 in the vertical direction.
  • an inductive displacement sensor 7 is arranged perpendicular to the sensor 2 and flush with the base 6.
  • the air outlet at sensor 2 creates an air cushion carrying sensor 2.
  • the air cushion changes so that the sensor 2 is more or less far from the base 6.
  • a constant, definable distance is established between the base 6 and the sensor 2.
  • the sensor 2 penetrates by the amount of the paper thickness further into the bearing bush 1, or moves away from the base 6 by this amount, since the air cushion is no longer supported on the base 6, but on the surface of the paper 8.
  • the inductive displacement meter 7 integrated in the base 6 registers this additional amount and transmits it to an electronic evaluation device, not shown.
  • the duct system 3 is designed such that a duct 10 for generating the air bearing between the sensor 2 and the bearing bush 1 and a further duct for supplying the air forming the air cushion are provided.
  • the channels are arranged at 90 to one another, so that only channel 10 is visible in FIG. Another arrangement is also conceivable. It goes without saying that the sensor 2 is secured against rotation within the bearing bush 1 and against falling out after switching off the air.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Length Measuring Devices With Unspecified Measuring Means (AREA)
  • Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
  • Measuring Arrangements Characterized By The Use Of Fluids (AREA)

Abstract

Dans le dispositif décrit, le papier repose sur un support et un capteur, sensible à la position de la surface du papier, est agencé de manière mobile, la position du capteur étant détectée par un dispositif de mesure. Le dispositif décrit est caractérisé en ce qu'un système de production d'un coussin d'air sur la face supérieure du papier est prévu, et en ce que le capteur est configuré et disposé de telle manière qu'il est porté par le coussin d'air. Cela permet d'éviter un endommagement du papier et de mesurer avec précision son épaisseur.
PCT/EP1987/000199 1986-04-17 1987-04-10 Dispositif pour mesurer l'epaisseur du papier ou similaire WO1987006334A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19863612914 DE3612914A1 (de) 1986-04-17 1986-04-17 Vorrichtung zum messen der dicke von papier oder dergleichen
DEP3612914.3860417 1986-04-17

Publications (1)

Publication Number Publication Date
WO1987006334A1 true WO1987006334A1 (fr) 1987-10-22

Family

ID=6298864

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1987/000199 WO1987006334A1 (fr) 1986-04-17 1987-04-10 Dispositif pour mesurer l'epaisseur du papier ou similaire

Country Status (2)

Country Link
DE (1) DE3612914A1 (fr)
WO (1) WO1987006334A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3906960A1 (de) * 1989-03-04 1990-09-06 Heidelberger Druckmasch Ag Vorrichtung zur bogenlaengenabfrage in einer bogen bearbeitenden maschine, insbesondere einer bogen-rotationsdruckmaschine
DE3907037A1 (de) * 1989-03-04 1990-09-06 Heidelberger Druckmasch Ag Vorrichtung zur bogenlaengenabfrage in einer bogen bearbeitenden maschine, insbesondere einer bogen-rotationsdruckmaschine

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5121688A (en) * 1988-08-19 1992-06-16 Presstek, Inc. Spark-discharge recording head with position sensor and control for imaging lithographic printing plates
DE4011646A1 (de) * 1990-04-11 1991-10-24 Micro Epsilon Messtechnik Dickenmesseinrichtung
GB9111140D0 (en) * 1991-05-23 1991-07-17 Control Tech Process Systems L Film thickness measuring capacitive sensor
DE59711173D1 (de) * 1996-04-09 2004-02-12 Hch Kuendig & Cie Ag Wetzikon Positioniersystem mit Druckmessung in der Luftschicht zwischen Messkopf und Messgut
DE19913928B4 (de) * 1999-03-26 2015-06-11 Voith Patent Gmbh Vorrichtung zum Bestimmen von Eigenschaften einer laufenden Materialbahn
DE502005003829D1 (de) 2005-01-13 2008-06-05 Plast Control Gmbh Vorrichtung und Verfahren zur kapazitiven Vermessung von Materialien
DE102005046154B4 (de) * 2005-09-27 2008-07-03 Siemens Ag Messvorrichtung und Messsystem zum Inspizieren einer Oberfläche eines Substrates
DE102005049927A1 (de) * 2005-10-18 2007-04-19 Koenig & Bauer Ag Sensoreinrichtung und Verfahren zum Betrieb der Sensoreinrichtung

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3855524A (en) * 1972-09-05 1974-12-17 Industrial Nucleonics Corp Measuring gauge with air bearing and resistant to tilt
EP0064325A2 (fr) * 1981-04-20 1982-11-10 AccuRay Corporation Appareil de mesure
EP0078095A2 (fr) * 1981-10-26 1983-05-04 AccuRay Corporation Disposition pour la mesure
EP0098036A1 (fr) * 1982-06-24 1984-01-11 AccuRay Corporation Dispositif pour déterminer les propriétés de matériaux en forme de feuilles
WO1984002772A1 (fr) * 1983-01-12 1984-07-19 Per Roode Berglund Appareil de mesure de l'epaisseur d'une bande mobile

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3948082A (en) * 1970-03-11 1976-04-06 Zumbach Electronic-Automatic Method and device for contactless measuring of the thickness of layers, particularly of insulating layers on metallic parts
US3696290A (en) * 1970-07-22 1972-10-03 Hays Corp Magnetic non-contact thickness gauge with means to compensate the effects of stray fields on the gauge
FR2398999A1 (fr) * 1977-07-27 1979-02-23 Measurex Corp Comparateur d'epaisseur de matieres en feuille
DE3221379A1 (de) * 1982-06-05 1983-12-08 M.A.N.- Roland Druckmaschinen AG, 6050 Offenbach Messvorrichtung fuer bogendicken in der transportbahn von boegen bei papierverarbeitungsmaschinen
DE3435908A1 (de) * 1984-09-29 1986-04-10 Phoenix Ag, 2100 Hamburg Vorrichtung zum beruehrungslosen messen der dicke von materialbahnen aus polymeren werkstoffen

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3855524A (en) * 1972-09-05 1974-12-17 Industrial Nucleonics Corp Measuring gauge with air bearing and resistant to tilt
EP0064325A2 (fr) * 1981-04-20 1982-11-10 AccuRay Corporation Appareil de mesure
EP0078095A2 (fr) * 1981-10-26 1983-05-04 AccuRay Corporation Disposition pour la mesure
EP0098036A1 (fr) * 1982-06-24 1984-01-11 AccuRay Corporation Dispositif pour déterminer les propriétés de matériaux en forme de feuilles
WO1984002772A1 (fr) * 1983-01-12 1984-07-19 Per Roode Berglund Appareil de mesure de l'epaisseur d'une bande mobile

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3906960A1 (de) * 1989-03-04 1990-09-06 Heidelberger Druckmasch Ag Vorrichtung zur bogenlaengenabfrage in einer bogen bearbeitenden maschine, insbesondere einer bogen-rotationsdruckmaschine
DE3907037A1 (de) * 1989-03-04 1990-09-06 Heidelberger Druckmasch Ag Vorrichtung zur bogenlaengenabfrage in einer bogen bearbeitenden maschine, insbesondere einer bogen-rotationsdruckmaschine
US5037080A (en) * 1989-03-04 1991-08-06 Heidelberger Druckmaschinen Ag Device for scanning the length of a sheet in a sheet processing machine, especially a sheet-fed rotary printing press

Also Published As

Publication number Publication date
DE3612914A1 (de) 1987-10-22

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