EP1249415A2 - Verfahren und Einrichtung zur Messung von Positionen von durchlaufenden Bogen - Google Patents
Verfahren und Einrichtung zur Messung von Positionen von durchlaufenden Bogen Download PDFInfo
- Publication number
- EP1249415A2 EP1249415A2 EP01129806A EP01129806A EP1249415A2 EP 1249415 A2 EP1249415 A2 EP 1249415A2 EP 01129806 A EP01129806 A EP 01129806A EP 01129806 A EP01129806 A EP 01129806A EP 1249415 A2 EP1249415 A2 EP 1249415A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- sheet
- sheets
- positions
- image
- computer unit
- 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.)
- Withdrawn
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H7/00—Controlling article feeding, separating, pile-advancing, or associated apparatus, to take account of incorrect feeding, absence of articles, or presence of faulty articles
- B65H7/02—Controlling article feeding, separating, pile-advancing, or associated apparatus, to take account of incorrect feeding, absence of articles, or presence of faulty articles by feelers or detectors
- B65H7/06—Controlling article feeding, separating, pile-advancing, or associated apparatus, to take account of incorrect feeding, absence of articles, or presence of faulty articles by feelers or detectors responsive to presence of faulty articles or incorrect separation or feed
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2511/00—Dimensions; Position; Numbers; Identification; Occurrences
- B65H2511/20—Location in space
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2511/00—Dimensions; Position; Numbers; Identification; Occurrences
- B65H2511/20—Location in space
- B65H2511/23—Coordinates, e.g. three dimensional coordinates
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2511/00—Dimensions; Position; Numbers; Identification; Occurrences
- B65H2511/20—Location in space
- B65H2511/24—Irregularities, e.g. in orientation or skewness
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2511/00—Dimensions; Position; Numbers; Identification; Occurrences
- B65H2511/40—Identification
- B65H2511/413—Identification of image
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2511/00—Dimensions; Position; Numbers; Identification; Occurrences
- B65H2511/50—Occurence
- B65H2511/51—Presence
- B65H2511/512—Marks, e.g. invisible to the human eye; Patterns
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2511/00—Dimensions; Position; Numbers; Identification; Occurrences
- B65H2511/50—Occurence
- B65H2511/51—Presence
- B65H2511/514—Particular portion of element
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2553/00—Sensing or detecting means
- B65H2553/40—Sensing or detecting means using optical, e.g. photographic, elements
- B65H2553/42—Cameras
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2701/00—Handled material; Storage means
- B65H2701/10—Handled articles or webs
- B65H2701/13—Parts concerned of the handled material
- B65H2701/131—Edges
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2701/00—Handled material; Storage means
- B65H2701/10—Handled articles or webs
- B65H2701/13—Parts concerned of the handled material
- B65H2701/132—Side portions
- B65H2701/1322—Side portions corner
Definitions
- the invention relates to a method according to claim 1 and to a Device for measuring the position of sheets for a printing press Claim 6.
- the object of the invention is therefore a method and to provide a device that accurately positions the substrate determine.
- the invention solves this problem with method claim 1 and the device claim 6.
- the solution according to the invention Edge areas of an arc each mapped, imaging data for one Computer unit transferred and the position of the sheet based on the Imaging data determined using an image recognition algorithm. Further developments of the invention are listed in the subclaims.
- the determined Positions of the sheet with stored positions in the computer unit compared, position deviations calculated from the comparison step, the Position deviations transmitted to the printing press and by means of a Sheet registration device corrected.
- the positions of the sheets shown can already be seen from the sheet corners are determined from the mapping data. This means already through Determine the x-y coordinates of two points from the mapping data in The positions can be determined using a coordinate system in the computer unit. The individual sheet edges are used to increase the sensitivity mapped and evaluated several times and then the obtained mapping data averages.
- the image recognition algorithm in the computer unit advantageously determines Sections from the edge areas of an image at the edge of the sheet, i.e. at the Transition of the arch to the support of the arch, and from the sections the Position of the bow. This allows the position of the bow to be changed with little Computational effort can be determined.
- FIG. 1 shows a section of an endless conveyor belt 5, that is commonly used in printing presses.
- the conveyor belt 5 is driven and moves in the direction indicated by the arrow Direction.
- a typical speed of the sheet 6 is 300 mm each Second.
- Above the conveyor belt 5 and the sheet 6 are two digital cameras 10, 10 'as part of an imaging device arranged at the edge region 7 of the sheet 6.
- the microchips of the Cameras 10, 10 ' preferably have CCD (Charge Coupled Device) technology on.
- the shutter speed of the cameras 10, 10 ' can be 1/100, for example Amount to 000 s.
- a short shutter speed of the cameras 10, 10 ' is necessary in order to to achieve a high sensitivity.
- the longer the shutter speed Cameras 10, 10 ' the further the sheet 6 moves during the recording or imaging on the conveyor belt 5 and deteriorates the measurement result, since the temporal assignment of the recording or mapping of the sheet 6 to Position of the sheet 6 forms a basis for the measurement.
- the taking lenses of the cameras 10, 10 ' are perpendicular to the viewing plane in the direction of the conveyor belt 5 adjacent sheet 6 directed. The one in this consideration Edge regions 7 of the sheet 6 which are hidden by the cameras 10, 10 ′ are shown in FIG. 1 shown with dashed lines.
- Mapping the Edge areas 7 of the sheet 6 provide digital data, which in this case as Imaging data are designated. This obtained image data will be like described later, processed. 1 shows the case in which the arch 6 has no position deviations, i.e. the sheet 6 is in the desired orientation and position and is neither in vertical nor in moved horizontally with respect to the conveyor belt 5.
- Fig. 2 shows the case in which the arc has 6 due to an angular displacement of undesired deviations in the vertical and in the horizontal direction ⁇ y and ⁇ x to the observer plane.
- ⁇ y and ⁇ x is the angle by which the sheet 6 has shifted compared to the error-free by the dashed rectangle position shown, be determined in the computer unit by simple geometric operations.
- the process of mapping is the same as that described in FIG. 1.
- the images are changed in comparison to FIG. 1, and consequently the digital image data obtained are also different.
- the state of position deviations of the sheet 6 in FIG. 2 leads to errors in the subsequent printing process and must therefore be corrected.
- Fig. 3 To explain the procedure for measuring positions and correcting them of position deviations is the schematic representation below Fig. 3 described, in which, as can be seen, the case of There are position deviations.
- the sheet 6 on the Conveyor belt 5 is transported in the direction of the arrow and the edge regions 7, 7 ' as a result of a trigger signal from the cameras 10 or 10 '.
- the digital imaging data are received by the cameras 10, 10 'via a connection transmitted to a computer unit 20.
- the computing unit 20 there is a Image recognition algorithm provided in which the imaging data can be evaluated are.
- the light / dark transition of the image from Sheet 6 to the conveyor belt 5 recorded.
- the screen 30 is not important in the invention.
- the image recognition algorithm are the corners of the sheet in the computer unit 20
- the image recognition algorithm determines image acquisition and edge region 7 and 7 ' a picture element, the two picture elements of edge regions 7 and 10 simultaneously imaged 7 'unambiguously determine the orientation and position of the arch 6.
- the sheet edges with Determining the corners of the bend always provides the sensors geometrically unique position of the sheet 6.
- the target coordinates of the image points can be determined by which angular position and what length in the horizontal and vertical direction of the sheet 6 shifted is. These shifts can be determined down to the micrometer range and correctable. This can be corrected by a subsequent correction step Positioning on the conveyor belt 5 can be guaranteed.
- the computing unit 10 specifies the correction values determined from target pixels and actual pixels a control device (not shown) of the printing press, which via a controller Printing cylinder or web run correction with servomotors.
- the use of an image recognition algorithm alongside the detection of pixels of the edge regions 7, 7 'of the sheets 6 more Variations of the step of determining the position of the arch 6.
- the illustration can capture the sheet 6 as a whole, in this way it can be determined whether the shape of the arch 6 is faulty, i.e. for example whether the edge areas 7, 7 ' the sheet 6 is damaged or kinked. This is then resolved with the help of the image recognition algorithm is taken into account when calculating the correction values. If, for example, the sheet 6 is bent, a sheet section is missing of an edge region 7, 7 'in the figure, the Image recognition algorithm the missing sheet section and represents the correct one Pixel of the corner of the edge area 7, 7 'fixed, i.e.
Landscapes
- Controlling Sheets Or Webs (AREA)
- Inking, Control Or Cleaning Of Printing Machines (AREA)
- Length Measuring Devices By Optical Means (AREA)
- Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)
Abstract
Description
- Fig. 1
- eine schematische Draufsicht eines Bogens auf einem Transportband und zwei Kameras als Teil einer Abbildungseinrichtung,
- Fig. 2
- eine ähnliche Darstellung wie nach Fig. 1, wobei der Bogen Positions-Abweichungen aufweist,
- Fig. 3
- eine ähnliche Darstellung wie nach Fig. 2 mit einer Blockdarstellung einer Rechnereinheit und eines Bildschirms.
Claims (8)
- Verfahren zur Messung von Positionen von durchlaufenden Bogen (6) mit einer Bilderzeugungseinrichtung zum wenigstens bereichsweisen Erzeugen eines Abbildes eines Bogens (6), gekennzeichnet durch das jeweilige Abbilden von Randbereichen (7, 7') eines Bogens (6), Übertragen von durch das Abbilden erzeugten Abbildungsdaten zu einer Rechnereinheit (20) und Ermitteln der Positionen der Bogen (6) anhand der Abbildungsdaten mittels eines Bilderkennungsalgorithmus.
- Verfahren zur Messung von Positionen von durchlaufenden Bogen (6) nach Anspruch 1, gekennzeichnet durch Vergleichen der ermittelten Positionen der Bogen (6) mit gespeicherten Positionen in der Rechnereinheit (20),
Errechnen von Positions-Abweichungen aus dem Vergleichsschritt,
Übertragen der Positions-Abweichungen an die Druckmaschine und
Korrigieren der Positions-Abweichungen mittels einer Bogen Registrationseinrichtung. - Verfahren zur Messung von Positionen von durchlaufenden Bogen (6) nach Anspruch 1 oder 2, gekennzeichnet durch Ermitteln der Positionen der abgebildeten Bogen (6) anhand von aus den Abbildungsdaten bestimmten Bogenecken.
- Verfahren zur Messung von Positionen von durchlaufenden Bogen (6) nach einem der vorstehenden Ansprüche, gekennzeichnet durch mehrmaliges Abbilden von einzelnen Randbereichen (7, 7') von durch die Druckmaschine transportierten Bogen (6), Bilden von Mittelwerten aus den Abbildungsdaten in der Rechnereinheit (20).
- Verfahren zur Messung von Positionen von durchlaufenden Bogen (6) nach einem der vorstehenden Ansprüche, gekennzeichnet durch Ermitteln von Abschnitten aus den Randbereichen (7, 7') einer Abbildung durch die Rechnereinheit (20),
Ermitteln der Positionen der Bogen (6) anhand der Abschnitte der Abbildungsdaten mittels eines Bilderkennungsalgorithmus. - Einrichtung zur Messung von Positionen von durchlaufenden Bogen (6) für eine Druckmaschine oder ein Kopiergerät mit einer Abbildungseinrichtung zum Abbilden der Bogen (6), gekennzeichnet durch eine Rechnereinheit (20) zur Auswertung der Abbildungen der Abbildungseinrichtung.
- Einrichtung zur Messung von Positionen von durchlaufenden Bogen (6) nach Anspruch 6, dadurch gekennzeichnet, dass die Abbildungseinrichtung wenigstens zwei CCD-Kameras (10, 10') enthält.
- Einrichtung zur Messung von Positionen von durchlaufenden Bogen (6) nach Anspruch 6 oder 7, dadurch gekennzeichnet, dass die Rechnereinheit (20) einen Bilderkennungsalgorithmus enthält.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10118556 | 2001-04-14 | ||
DE10118556 | 2001-04-14 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1249415A2 true EP1249415A2 (de) | 2002-10-16 |
EP1249415A3 EP1249415A3 (de) | 2004-02-04 |
Family
ID=7681556
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP01129806A Withdrawn EP1249415A3 (de) | 2001-04-14 | 2001-12-14 | Verfahren und Einrichtung zur Messung von Positionen von durchlaufenden Bogen |
Country Status (4)
Country | Link |
---|---|
US (2) | US20030164876A1 (de) |
EP (1) | EP1249415A3 (de) |
JP (1) | JP2002331646A (de) |
DE (2) | DE10214531B4 (de) |
Cited By (4)
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EP2030924A1 (de) * | 2007-08-28 | 2009-03-04 | Müller Martini Holding AG | Einrichtung zum Verarbeiten von Druckprodukten |
CH699242A1 (de) * | 2008-07-25 | 2010-01-29 | Ferag Ag | Optisches Erkennungsverfahren bei der Druckweiterverarbeitung. |
EP2221264A3 (de) * | 2009-02-19 | 2013-05-22 | Canon Kabushiki Kaisha | Blattförderungsvorrichtung mit Ausrichtungskorrekturausführung |
CN109996680A (zh) * | 2016-10-11 | 2019-07-09 | Bst 艾尔特洛马特国际有限公司 | 用于传输的材料幅面的功能单元的检验方法 |
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US8103085B1 (en) | 2007-09-25 | 2012-01-24 | Cognex Corporation | System and method for detecting flaws in objects using machine vision |
US8186675B2 (en) * | 2008-10-06 | 2012-05-29 | Xerox Corporation | Systems and methods for controlling substrate flatness in printing devices using vacuum and/or the flow of air |
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DE20008731U1 (de) * | 2000-05-17 | 2000-08-03 | Roland Man Druckmasch | Druckmaschine, insbesondere Bogenoffsetdruckmaschine |
-
2001
- 2001-12-14 EP EP01129806A patent/EP1249415A3/de not_active Withdrawn
-
2002
- 2002-03-14 US US10/097,396 patent/US20030164876A1/en not_active Abandoned
- 2002-04-02 DE DE10214531A patent/DE10214531B4/de not_active Expired - Fee Related
- 2002-04-09 DE DE10215511A patent/DE10215511A1/de not_active Ceased
- 2002-04-15 JP JP2002112098A patent/JP2002331646A/ja active Pending
- 2002-04-15 US US10/122,614 patent/US6845288B2/en not_active Expired - Fee Related
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Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2030924A1 (de) * | 2007-08-28 | 2009-03-04 | Müller Martini Holding AG | Einrichtung zum Verarbeiten von Druckprodukten |
CH699242A1 (de) * | 2008-07-25 | 2010-01-29 | Ferag Ag | Optisches Erkennungsverfahren bei der Druckweiterverarbeitung. |
EP2221264A3 (de) * | 2009-02-19 | 2013-05-22 | Canon Kabushiki Kaisha | Blattförderungsvorrichtung mit Ausrichtungskorrekturausführung |
CN109996680A (zh) * | 2016-10-11 | 2019-07-09 | Bst 艾尔特洛马特国际有限公司 | 用于传输的材料幅面的功能单元的检验方法 |
Also Published As
Publication number | Publication date |
---|---|
EP1249415A3 (de) | 2004-02-04 |
US20020177918A1 (en) | 2002-11-28 |
US20030164876A1 (en) | 2003-09-04 |
US6845288B2 (en) | 2005-01-18 |
DE10215511A1 (de) | 2002-11-21 |
DE10214531B4 (de) | 2011-04-28 |
JP2002331646A (ja) | 2002-11-19 |
DE10214531A1 (de) | 2002-10-17 |
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