EP1862309A2 - Sensor device - Google Patents

Sensor device Download PDF

Info

Publication number
EP1862309A2
EP1862309A2 EP07109333A EP07109333A EP1862309A2 EP 1862309 A2 EP1862309 A2 EP 1862309A2 EP 07109333 A EP07109333 A EP 07109333A EP 07109333 A EP07109333 A EP 07109333A EP 1862309 A2 EP1862309 A2 EP 1862309A2
Authority
EP
European Patent Office
Prior art keywords
sensor device
printing
sections
sensor
strip
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.)
Granted
Application number
EP07109333A
Other languages
German (de)
French (fr)
Other versions
EP1862309A3 (en
EP1862309B1 (en
Inventor
Annette Fuchs
Thomas Fuchs
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.)
Koenig and Bauer AG
Original Assignee
Koenig and Bauer 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 Koenig and Bauer AG filed Critical Koenig and Bauer AG
Publication of EP1862309A2 publication Critical patent/EP1862309A2/en
Publication of EP1862309A3 publication Critical patent/EP1862309A3/en
Application granted granted Critical
Publication of EP1862309B1 publication Critical patent/EP1862309B1/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F33/00—Indicating, counting, warning, control or safety devices
    • B41F33/0036—Devices for scanning or checking the printed matter for quality control

Definitions

  • the invention relates to a sensor device for the optical detection of strip-shaped printing surfaces on along a printing substrate moving substrates according to the preamble of the first claim.
  • a method for the synchronized operation of a plurality of electronic cameras is known in which the individual cameras simultaneously record one image in response to a trigger signal and the image data of the individual cameras are combined to form an overall image.
  • a first number of image lines are first read from each camera and discarded.
  • a second predetermined number of image lines are read in succession in a predetermined order of the cameras from each camera, and processed into an overall image.
  • the remaining image lines are read out independently of the other cameras and the read-out image data is discarded.
  • a disadvantage of this solution is the cost of the large number of cameras, the cost of synchronizing the cameras and the low image data processing speed due to the complex data handling.
  • the invention is therefore based on the object, the effort for a sensor device with strip-shaped detection range, which is suitable for a spectral density measurement or color control based on print control strips to reduce.
  • a sensor device by the combination of a low-cost RGB or SW area camera having a matrix sensor, with an arrangement of mirrors or prisms, wherein successive by the optical means in the direction of the main extent of the strip-shaped printing surface to be controlled Area sections (in the case of print control strips, this is generally the width of the substrate) are adjacent to each other and can be projected line by line onto the matrix sensor.
  • the invention has the advantages that the native resolution of the sensor matrix is fully utilized by the optical splitting of the printing surface strip into strip sections and at the same time the disadvantage of CCD matrix sensors, which consists in that the matrix sensor can not be addressed line by line, but the entire sensor matrix is read out serially must be overcome.
  • an area camera 3 is arranged laterally on a printing material web in a rotary printing press, wherein the printing material 2 can be designed to be roll-shaped or arc-shaped.
  • the printed material 2 transported in the direction of the arrow has conventional print control strips 1.K, which extend as a strip-shaped printing surface 1 in printed image edge regions transversely to the transport direction and are applied for color control or print quality control.
  • optical means 5 designed as a mirror 5.
  • the mirror 5.S partially avoid the mutual shading perpendicular to optical axis 8 of the area camera 3 are offset by their width to each other and approximately parallel rays directed to the matrix sensor 4. Instead of the mirrors 5.
  • prisms for beam deflection can also be used on the matrix sensor 4.
  • Each mirror 5.S is assigned a section 6 of the print control strip 1.K whose image is reflected by the mirror 5.S. towards the area camera 3.
  • the mirrors 5.S are aligned in such a way that the images of the juxtaposed sections 6 of the print control strip 1.K can be projected among one another on row groups 7 of the matrix sensor 4 (FIG. 2).
  • a lighting device 9 is arranged on the printing substrate, which is synchronized with the area camera 3 and the adjacent sections 6 of the print control strip 1.K pulsed line lighting.
  • a linear lighting can be realized, for example, with cylindrical lenses.
  • the illumination device 9 has a short flash time and can be formed from light sources with different monochromatic light spectra, for example red, blue and green LED groups. By flashing with different illumination spectra, it is possible to use the area camera 3 as a spectral, Tristimulusfarb- or density sensor.
  • the light sources are expediently controllable in sections in their flashlight intensity in order to compensate for different emission properties of the light sources and the different projection distances (object widths) between the sections 6 of the print control strips 1.K and the area camera 3 and the associated different light intensities of the images projected onto the matrix sensor 4.
  • the illumination device 9 is advantageously arranged at a vertical angle of 0 or 45 ° to the mirrors 5.S to minimize reflections.
  • the area camera 3 is advantageously slightly oblique to the surface of the printing material 2, in order to achieve a flat as possible arrangement and the projection of a rectangular strip on the matrix sensor 4.
  • the mirrors 5.S are preferably equipped with different radii of curvature to compensate for different magnifications depending on the object's width.
  • special lenses can be used for the area camera 3, in which the beam path does not open, but runs parallel.
  • the same magnification always applies and the mirrors 5.S can be made simpler.
  • the sensor device When the print control strip 1.K enters the detection range of the sensor device, the sensor device is activated, the lighting device 9 is triggered and an image of the print control strip 1.K is detected by the area camera 3 and stored in a known manner or further processed for a printing machine control.
  • search methods in the data array can subsequently be applied to the image acquisition in order to separate the desired image data from the non-relevant image data. This is particularly advantageous in the case of narrow print control strips 1.K if print image areas surrounding the print control strip 1.K are also detected by matrix sensor 4, which do not belong to print control strip 1.K and therefore from the image data array prior to further processing for a substrate quality control, color control or printing machine control must be discarded.
  • the proposed sensor device is not limited to the image analysis of print control strips 1.K, but also for all other image acquisition functions of strip-shaped Pressure surfaces 1 with a dominant direction of extension can be used transversely or longitudinally to the transport direction.

Landscapes

  • Engineering & Computer Science (AREA)
  • Quality & Reliability (AREA)
  • Inking, Control Or Cleaning Of Printing Machines (AREA)
  • Length Measuring Devices By Optical Means (AREA)
  • Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)
  • Studio Devices (AREA)

Abstract

The device has a flat camera (3) e.g. red, green, blue flat camera, with a matrix sensor (4) attached to a print substrate web. Sections (6.1-6.5) of pressure control strips are projected onto a print substrate (2) through an optical unit, and are successive in a direction of main expansion of the strips, where the optical unit is pre-arranged to the flat camera and has mirrors (5.S) or prisms. The unit is shared across the print substrate width along an optical axis (8) of the camera at regular intervals. The device is activated during shrinking of the strips in a lamellar detection area.

Description

Die Erfindung betrifft eine Sensoreinrichtung für die optische Erfassung von streifenförmigen Druckflächen auf entlang einer Bedruckstoffbahn bewegten Bedruckstoffen gemäß dem Oberbegriff des ersten Anspruchs.The invention relates to a sensor device for the optical detection of strip-shaped printing surfaces on along a printing substrate moving substrates according to the preamble of the first claim.

In Rotationsdruckmaschinen werden seit langem Zeilen - oder Flächenkameras als Sensoren zur Druckbildkontrolle an bewegten Bedruckstoffen eingesetzt. Die geometrische Auflösung der Kameras sollte dabei bei 0.1 mm/ Pixel liegen.In rotary printing machines, line or area cameras have been used for a long time as sensors for image control on moving substrates. The geometric resolution of the cameras should be at 0.1 mm / pixel.

Wenn die Aufgabe besteht, in Transportrichtung gesehen nur relative kurze, in axialer Richtung (Bedruckstoffbreite) aber recht lange Bereiche, beispielsweise Druckkontrollstreifen, zu erfassen, entstehen folgende Probleme:

  1. 1. Zeilenkameras können durch ihre hohe Zahl von ca. 10000 Pixel pro Sensor die notwendige geometrische Auflösung von 0.1 mm pro Pixel in axialer Richtung erreichen, jedoch ist die Auflösung in Transportrichtung wegen der Zeilenfrequenz des Sensors von maximal 10 kHz bei hohen Transportgeschwindigkeiten von 5 m/s auf 0,5 mm eingeschränkt.
  2. 2. Industrie-Flächenkameras besitzen gegenwärtig eine Auflösung von ca.2000 x 1500 Pixel, die sich bei RGB- Kameras auf 3 Farbkanäle verteilen. Für die Erfassung der gesamten Bedruckstoffbreite mit der notwendigen geometrischen Auflösung von 0.1 mm/Pixel müsste die Kamera quer zur Transportrichtung verfahrbar auf eine Traverse montiert und mit seitlichen Verstellbewegungen nacheinander auf kleine Abschnitte von beispielsweise 200 mm Breite gerichtet werden, wobei ein seitlicher Vorschub nach jeder Druckbildabtastung erfolgt. Dies erfordert beträchtlichen mechanischen Aufwand und die Notwendigkeit, zur Erfassung eines kompletten Messwertsatzes für eine Bedruckstoffbreite von beispielsweise 2 m mindestens 10 aufeinander folgende Druckbilder abzutasten, zwischen denen bereits signifikante Unterschiede im Druckbild auftreten können und eine Vergleichbarkeit einschränken.
If the task is to detect only relatively short, in the transport direction, but relatively long, in the axial direction (substrate width) but quite long areas, such as pressure control strips, the following problems arise:
  1. 1. Line scan cameras can achieve the necessary geometrical resolution of 0.1 mm per pixel in the axial direction due to their high number of approx. 10000 pixels per sensor, however the resolution in transport direction is maximum 10 kHz due to the line frequency of the sensor at high transport speeds of 5 m / s restricted to 0.5 mm.
  2. 2. Industrial area cameras currently have a resolution of approx. 2,000 x 1,500 pixels, which are distributed over 3 color channels in RGB cameras. To capture the entire width of the substrate with the necessary geometrical resolution of 0.1 mm / pixel, the camera would have to be mounted transversely to the transport direction movable on a crossbar and directed laterally with adjustment movements on small sections, for example, 200 mm width, with a lateral feed after each print image scanning he follows. This requires considerable mechanical effort and the need to scan at least 10 consecutive printed images to capture a complete set of measurements for a printing material width of, for example, 2 m, between which already significant differences in the printed image can occur and limit comparability.

Eine Parallelisierung der Messungen mit mehreren über die Bedruckstoffbreite verteilten Kameras wäre zur Erhöhung der Auflösung ebenfalls möglich.A parallelization of the measurements with several cameras distributed across the substrate width would also be possible to increase the resolution.

Aus der DE 102004033495 A1 ist ein Verfahren zum synchronisierten Betrieb einer Vielzahl elektronischer Kameras bekannt, bei welchem die einzelnen Kameras auf ein Auslösesignal hin gleichzeitig jeweils ein Bild aufnehmen und die Bilddaten der einzelnen Kameras zu einem Gesamtbild zusammengeführt werden. Nach Abschluss der Bildaufnahme werden aus jeder Kamera zunächst eine erste Anzahl von Bildzeilen ausgelesen und verworfen. Anschließend werden zeitlich nacheinander in einer vorbestimmten Reihenfolge der Kameras aus jeder Kamera eine zweite vorbestimmte Anzahl von Bildzeilen ausgelesen und zu einem Gesamtbild verarbeitet. Schließlich werden nach dem Auslesen der zweiten Anzahl von Bildzeilen unabhängig von den anderen Kameras die restlichen Bildzeilen ausgelesen und die ausgelesenen Bilddaten verworfen.From the DE 102004033495 A1 a method for the synchronized operation of a plurality of electronic cameras is known in which the individual cameras simultaneously record one image in response to a trigger signal and the image data of the individual cameras are combined to form an overall image. After completion of the image acquisition, a first number of image lines are first read from each camera and discarded. Subsequently, a second predetermined number of image lines are read in succession in a predetermined order of the cameras from each camera, and processed into an overall image. Finally, after reading out the second number of image lines, the remaining image lines are read out independently of the other cameras and the read-out image data is discarded.

Nachteilig an dieser Lösung sind die Kosten für die Vielzahl von Kameras, der Aufwand für die Synchronisierung der Kameras und die geringe Bilddatenverarbeitungsgeschwindigkeit aufgrund des aufwändigen Datenhandlings.A disadvantage of this solution is the cost of the large number of cameras, the cost of synchronizing the cameras and the low image data processing speed due to the complex data handling.

Der Erfindung liegt daher die Aufgabe zugrunde, den Aufwand für eine Sensoreinrichtung mit streifenförmigem Erfassungsbereich, die für eine spektrale Dichtemessung bzw. Farbregelung auf der Basis von Druckkontrollstreifen geeignet ist, zu reduzieren.The invention is therefore based on the object, the effort for a sensor device with strip-shaped detection range, which is suitable for a spectral density measurement or color control based on print control strips to reduce.

Diese Aufgabe wird erfindungsgemäß durch eine Sensoreinrichtung mit den Merkmalen des ersten Anspruchs gelöst.This object is achieved by a sensor device with the features of the first claim.

Es wird vorgeschlagen, eine Sensoreinrichtung durch die Kombination einer kostengünstigen RGB- oder SW-Flächenkamera, die über einen Matrixsensor verfügt, mit einer Anordnung aus Spiegeln oder Prismen zu schaffen, wobei durch die optischen Mittel in Richtung der Hauptausdehnung der zu kontrollierenden streifenförmigen Druckfläche aufeinander folgende Flächenabschnitte (bei Druckkontrollstreifen ist das i.a. die Bedruckstoffbreite) benachbart zueinander und zeilengruppenweise auf den Matrixsensor projizierbar sind.It is proposed to provide a sensor device by the combination of a low-cost RGB or SW area camera having a matrix sensor, with an arrangement of mirrors or prisms, wherein successive by the optical means in the direction of the main extent of the strip-shaped printing surface to be controlled Area sections (in the case of print control strips, this is generally the width of the substrate) are adjacent to each other and can be projected line by line onto the matrix sensor.

Die Erfindung hat die Vorteile, dass durch die optische Splittung des Druckflächenstreifens in Streifenabschnitte die native Auflösung der Sensormatrix vollständig ausgenutzt wird und gleichzeitig der Nachteil von CCD- Matrixsensoren, der darin besteht, dass der Matrixsensor nicht zeilenweise adressierbar ist, sondern die gesamte Sensormatrix seriell ausgelesen werden muss, überwunden wird.The invention has the advantages that the native resolution of the sensor matrix is fully utilized by the optical splitting of the printing surface strip into strip sections and at the same time the disadvantage of CCD matrix sensors, which consists in that the matrix sensor can not be addressed line by line, but the entire sensor matrix is read out serially must be overcome.

Die Erfindung soll an einem Ausführungsbeispiel näher erläutert werden, bei welchem die streifenförmige Druckfläche als Druckkontrollstreifen ausgestaltet ist. Die dazugehörigen Zeichnungen zeigen in

Figur 1
eine vereinfachte Darstellung der Sensoreinrichtung mit einem Spiegelsystem in einer Ansicht von oben
Figur 2
die Sensoreinrichtung in einer Ansicht von vorn
The invention will be explained in more detail on an embodiment in which the strip-shaped printing surface is designed as a print control strip. The accompanying drawings show in
FIG. 1
a simplified representation of the sensor device with a mirror system in a view from above
FIG. 2
the sensor device in a view from the front

Wie aus der Figur 1 ersichtlich, ist eine Flächenkamera 3 seitlich an einer Bedruckstoffbahn in einer Rotationsdruckmaschine angeordnet, wobei der Bedruckstoff 2 rollen- oder bogenförmig beschaffen sein kann. Der in Pfeilrichtung transportierte Bedruckstoff 2 weist übliche Druckkontrollstreifen 1.K auf, die sich als streifenförmige Druckfläche 1 in Druckbildrandbereichen quer zur Transportrichtung erstrecken und zur Farbregelung oder Druckqualitätskontrolle aufgebracht sind.As can be seen from FIG. 1, an area camera 3 is arranged laterally on a printing material web in a rotary printing press, wherein the printing material 2 can be designed to be roll-shaped or arc-shaped. The printed material 2 transported in the direction of the arrow has conventional print control strips 1.K, which extend as a strip-shaped printing surface 1 in printed image edge regions transversely to the transport direction and are applied for color control or print quality control.

In einem annähernd konstanten Abstand von der Bedruckstoffoberfläche sind optische Mittel 5, ausgebildet als Spiegel 5.S, in regelmäßigen, von der Auflösung des Matrixsensors 4 abhängigen Abständen über die Bedruckstoffbreite verteilt, wobei die Spiegel 5.S zur Vermeidung der gegenseitigen Abschattung teilweise senkrecht zur optischen Achse 8 der Flächenkamera 3 um ihre Breite zueinander versetzt sind und annähernd Parallelstrahlen auf den Matrixsensor 4 richten. Anstelle der Spiegel 5.S können ebenso Prismen zur Strahlumlenkung auf den Matrixsensor 4 eingesetzt werden.At an approximately constant distance from the substrate surface optical means 5, designed as a mirror 5.S, distributed in regular, dependent on the resolution of the matrix sensor 4 distances over the substrate width, the mirror 5.S partially avoid the mutual shading perpendicular to optical axis 8 of the area camera 3 are offset by their width to each other and approximately parallel rays directed to the matrix sensor 4. Instead of the mirrors 5.S, prisms for beam deflection can also be used on the matrix sensor 4.

Jedem Spiegel 5.S ist ein Abschnitt 6 des Druckkontrollstreifens 1.K zugeordnet, dessen Abbild vom Spiegel 5.S in Richtung auf die Flächenkamera 3 reflektiert wird. Die Spiegel 5.S sind derart ausgerichtet, dass die Abbildungen der nebeneinander liegenden Abschnitte 6 des Druckkontrollstreifens 1.K untereinander auf Zeilengruppen 7 des Matrixsensors 4 projizierbar sind (Fig. 2).Each mirror 5.S is assigned a section 6 of the print control strip 1.K whose image is reflected by the mirror 5.S. towards the area camera 3. The mirrors 5.S are aligned in such a way that the images of the juxtaposed sections 6 of the print control strip 1.K can be projected among one another on row groups 7 of the matrix sensor 4 (FIG. 2).

Zur Vermeidung von Bewegungsunschärfen bei schnell bewegten Bedruckstoffen 2 ist eine Beleuchtungseinrichtung 9 an der Bedruckstoffbahn angeordnet, die mit der Flächenkamera 3 synchronisiert ist und die die nebeneinander liegenden Abschnitte 6 des Druckkontrollstreifens 1.K impulsweise linienförmig beleuchtet. Eine linienförmige Beleuchtung ist beispielsweise mit Zylinderlinsen realisierbar.To avoid motion blur in fast-moving substrates 2, a lighting device 9 is arranged on the printing substrate, which is synchronized with the area camera 3 and the adjacent sections 6 of the print control strip 1.K pulsed line lighting. A linear lighting can be realized, for example, with cylindrical lenses.

Die Beleuchtungseinrichtung 9 weist eine kurze Blitzzeit auf und kann aus Lichtquellen mit unterschiedlichen monochromatischen Lichtspektren, beispielsweise roten, blauen und grünen LED-Gruppen, gebildet sein. Durch Blitzen mit unterschiedlichen Beleuchtungsspektren ist es möglich, die Flächenkamera 3 als Spektral-, Tristimulusfarb- oder Dichtesensor zu nutzen.The illumination device 9 has a short flash time and can be formed from light sources with different monochromatic light spectra, for example red, blue and green LED groups. By flashing with different illumination spectra, it is possible to use the area camera 3 as a spectral, Tristimulusfarb- or density sensor.

Die Lichtquellen sind zweckmäßig abschnittsweise in ihrer Blitzlichtstärke steuerbar, um unterschiedliche Emissionseigenschaften der Lichtquellen und die unterschiedlichen Projektionsentfernungen (Gegenstandsweiten) zwischen den Abschnitten 6 der Druckkontrollstreifen 1.K und der Flächenkamera 3 und die damit verbundenen unterschiedlichen Lichtintensitäten der auf den Matrixsensor 4 projizierten Abbildungen auszugleichen.The light sources are expediently controllable in sections in their flashlight intensity in order to compensate for different emission properties of the light sources and the different projection distances (object widths) between the sections 6 of the print control strips 1.K and the area camera 3 and the associated different light intensities of the images projected onto the matrix sensor 4.

Die Beleuchtungseinrichtung 9 ist vorteilhafterweise im senkrechten Winkel von 0 oder 45° zu den Spiegeln 5.S angeordnet, um Reflexionen zu minimieren.The illumination device 9 is advantageously arranged at a vertical angle of 0 or 45 ° to the mirrors 5.S to minimize reflections.

Die Flächenkamera 3 steht vorteilhafterweise leicht schräg zur Oberfläche des Bedruckstoffes 2, um eine möglichst flache Anordnung und die Projektion eines rechtwinkligen Streifens auf den Matrixsensor 4 zu erreichen.The area camera 3 is advantageously slightly oblique to the surface of the printing material 2, in order to achieve a flat as possible arrangement and the projection of a rectangular strip on the matrix sensor 4.

Die Spiegel 5.S sind vorzugsweise mit unterschiedlichen Krümmungsradien ausgestattet, um unterschiedliche Vergrößerungen je nach Gegenstandsweite zu kompensieren. Vorteilhafterweise können spezielle Objektive für die Flächenkamera 3 eingesetzt werden, bei denen der Strahlengang sich nicht öffnet, sondern parallel verläuft. Damit herrscht unabhängig von der Gegenstandsweite immer der gleiche Abbildungsmaßstab und die Spiegel 5.S können einfacher gestaltet sein.The mirrors 5.S are preferably equipped with different radii of curvature to compensate for different magnifications depending on the object's width. Advantageously, special lenses can be used for the area camera 3, in which the beam path does not open, but runs parallel. Thus, regardless of the object's distance, the same magnification always applies and the mirrors 5.S can be made simpler.

Zur Wirkungsweise der erfindungsgemäßen Einrichtung:For the operation of the device according to the invention:

Beim Einlaufen des Druckkontrollstreifens 1.K in den Erfassungsbereich der Sensoreinrichtung wird die Sensoreinrichtung aktiviert, die Beleuchtungseinrichtung 9 ausgelöst und ein Abbild des Druckkontrollstreifens 1.K von der Flächenkamera 3 erfasst und in bekannter Weise gespeichert bzw. für eine Druckmaschinensteuerung weiterverarbeitet.When the print control strip 1.K enters the detection range of the sensor device, the sensor device is activated, the lighting device 9 is triggered and an image of the print control strip 1.K is detected by the area camera 3 and stored in a known manner or further processed for a printing machine control.

Ein Druckkontrollstreifen 1.K hat beispielsweise die Abmessungen von B x H = 1000 mm x 20 mm. Von den oberhalb des Bedruckstoffes 2 angeordneten und quer zur Transportrichtung über die Bedruckstoffbreite verteilten beispielsweise fünf Spiegeln 5.S wird der Druckkontrollstreifen 1.K in fünf Abschnitten 6.1 ...6.5 von jeweils 200 mm x 20 mm Ausdehnung auf dem Matrixsensor 4 mit z.B. 2000 x 1500 Pixel abgebildet, wobei die ursprünglich nebeneinander liegenden Abschnitte 6 - untereinander angeordnet - eine Fläche von 200mm x100 mm bilden und so auf den Matrixsensor 4 projiziert werden, dass jeder der Abschnitte 6.1...6.5 auf einer Zeilengruppe 7.1 ...7.5 abgebildet ist. Daraus ergibt sich bei optimalen geometrischen Verhältnissen eine theoretische Auflösung von 0.1 mm pro Pixel in horizontaler und von 0,07 mm pro Pixel in vertikaler Richtung. Mit dieser Auflösung können Messstreifen ausreichend genau digitalisiert, visualisiert bzw. vermessen werden.A print control strip 1.K has, for example, the dimensions of B x H = 1000 mm x 20 mm. From the five mirrors 5.S arranged above the printing substrate 2 and distributed across the width of the substrate transversely to the transport direction, the print control strip 1.K is divided into five sections 6.1... 6.5 each of 200 mm × 20 mm extension on the matrix sensor 4 with e.g. 2000 x 1500 pixels shown, wherein the originally adjacent sections 6 - arranged one below the other - form an area of 200mm x100 mm and are projected onto the matrix sensor 4, that each of sections 6.1 ... 6.5 on a line group 7.1 ... 7.5 is shown. This results in optimal geometrical ratios, a theoretical resolution of 0.1 mm per pixel in the horizontal and 0.07 mm per pixel in the vertical direction. With this resolution, measuring strips can be digitized, visualized or measured with sufficient accuracy.

Durch die Ermittlung der Remissions-, Dichte- bzw. spektralen Messwerte in Arrayform können anschließend an die Bilderfassung Suchverfahren im Datenarray angewendet werden, um die gewünschten Bilddaten von den nicht relevanten Bilddaten zu trennen. Dies ist besonders vorteilhaft bei schmalen Druckkontrollstreifen 1.K, wenn vom Matrixsensor 4 auch den Druckkontrollstreifen 1.K umgebende Druckbildbereiche mit erfasst werden, die nicht zum Druckkontrollstreifen 1.K gehören und deshalb aus dem Bilddatenarray vor der Weiterverarbeitung für eine Bedruckstoffqualitätskontrolle, Farbregelung oder Druckmaschinensteuerung ausgesondert werden müssen.By determining the reflectance, density or spectral measured values in array form, search methods in the data array can subsequently be applied to the image acquisition in order to separate the desired image data from the non-relevant image data. This is particularly advantageous in the case of narrow print control strips 1.K if print image areas surrounding the print control strip 1.K are also detected by matrix sensor 4, which do not belong to print control strip 1.K and therefore from the image data array prior to further processing for a substrate quality control, color control or printing machine control must be discarded.

Die vorgeschlagene Sensoreinrichtung ist nicht auf die Bildanalyse von Druckkontrollstreifen 1.K beschränkt, sondern ebenso für alle weiteren Bilderfassungsfunktionen von streifenförmigen Druckflächen 1 mit einer dominierenden Erstreckungsrichtung quer oder längs zur Transportrichtung einsetzbar.The proposed sensor device is not limited to the image analysis of print control strips 1.K, but also for all other image acquisition functions of strip-shaped Pressure surfaces 1 with a dominant direction of extension can be used transversely or longitudinally to the transport direction.

Aufstellung der verwendeten BezugszeichenList of used reference numbers

11
Druckfläche,Print area
1.K1.K
DruckkontrollstreifenPrint control strip
22
Bedruckstoffsubstrate
33
FlächenkameraAreascan
44
Matrixsensorarray sensor
55
optische Mitteloptical means
5.S5.S
Spiegelmirror
6, 6.1 ... 6.56, 6.1 ... 6.5
Abschnitt der DruckflächeSection of the printing surface
7, 7.1 ... 7.57, 7.1 ... 7.5
Zeilengruppestanza
88th
optische Achse der Flächenkameraoptical axis of the area camera
99
Beleuchtungseinrichtunglighting device

Claims (8)

Sensoreinrichtung für die optische Erfassung von streifenförmigen Druckflächen (1) auf entlang einer Bedruckstoffbahn bewegten Bedruckstoffen (2), bestehend aus einer der Bedruckstoffbahn zugeordneten Flächenkamera (3) mit einem Matrixsensor (4), dadurch gekennzeichnet, dass durch optische Mittel (5), die der Flächenkamera (3) vorgeordnet sind, Abschnitte (6) der Druckfläche (1), die in Richtung der Hauptausdehnung der Druckfläche (1) aufeinander folgen, benachbart zueinander auf den Matrixsensor (4) projizierbar sind.Sensor device for the optical detection of strip-shaped printing surfaces (1) moved along a printing substrate printing materials (2) consisting of a the printing material associated surface camera (3) with a matrix sensor (4), characterized in that by optical means (5) the surface camera (3) are arranged upstream, sections (6) of the printing surface (1), which follow one another in the direction of the main extent of the printing surface (1) adjacent to each other on the matrix sensor (4) are projected. Sensoreinrichtung nach Anspruch 1, dadurch gekennzeichnet, dass die optischen Mittel (5) - in regelmäßigen Abständen über die Bedruckstoffbreite entlang der optischen Achse (8) der Flächenkamera (3) verteilt und jeweils einem Abschnitt (6) der Druckfläche (1) zugeordnet sind, - relativ zur optischen Achse (8) der Flächenkamera (3) zueinander versetzt sind und - Abbildungen der jeweils zugeordneten Abschnitte (6) der Druckfläche (1) auf benachbarte Zeilengruppen (7) des Matrixsensors (4) projizieren, wobei die Reihenfolge der Abschnitte (6) der Reihenfolge der Zeilengruppen (7) entspricht. Sensor device according to claim 1, characterized in that the optical means (5) - Distributed at regular intervals over the width of the substrate along the optical axis (8) of the surface camera (3) and are each associated with a section (6) of the printing surface (1), - Relative to the optical axis (8) of the surface camera (3) are offset from one another and - Project images of the respectively associated sections (6) of the printing surface (1) onto adjacent row groups (7) of the matrix sensor (4), the sequence of the sections (6) corresponding to the sequence of the row groups (7). Sensoreinrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die streifenförmige Druckfläche (1) ein sich quer zur Transportrichtung erstreckender Druckkontrollstreifen (1.K) ist.Sensor device according to claim 1 or 2, characterized in that the strip-shaped pressure surface (1) is a pressure control strip (1.K) extending transversely to the transport direction. Sensoreinrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die optischen Mittel (5) Spiegel (5.S) oder Prismen aufweisen.Sensor device according to claim 1 or 2, characterized in that the optical means (5) have mirrors (5.s) or prisms. Sensoreinrichtung nach Anspruch 4, dadurch gekennzeichnet, dass die Spiegel (5.S) so geformt sind, dass eine von der Gegenstandsweite abhängige Vergrößerung der Abschnitte (6) kompensierbar ist.Sensor device according to claim 4, characterized in that the mirrors (5.S) are shaped so that a depending on the subject-size enlargement of the sections (6) can be compensated. Sensoreinrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass eine Beleuchtungseinrichtung (9) die streifenförmige Druckfläche (1) impulsweise linienförmig beleuchtet.Sensor device according to one of the preceding claims, characterized in that a lighting device (9) illuminates the strip-shaped printing surface (1) in a pulse-like linear manner. Sensoreinrichtung nach Anspruch 6, dadurch gekennzeichnet, dass in der Beleuchtungseinrichtung (9) unterschiedliche Beleuchtungsspektren aktivierbar sind.Sensor device according to claim 6, characterized in that different illumination spectra can be activated in the illumination device (9). Sensoreinrichtung nach Anspruch 6 oder 7, dadurch gekennzeichnet, dass die Beleuchtungsstärke der Beleuchtungseinrichtung (9) an die Gegenstandsweite der Abschnitte (6) anpassbar ist.Sensor device according to claim 6 or 7, characterized in that the illuminance of the illumination device (9) to the object width of the sections (6) is adjustable.
EP20070109333 2006-05-31 2007-05-31 Sensor device Expired - Fee Related EP1862309B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE200610025324 DE102006025324A1 (en) 2006-05-31 2006-05-31 sensor device

Publications (3)

Publication Number Publication Date
EP1862309A2 true EP1862309A2 (en) 2007-12-05
EP1862309A3 EP1862309A3 (en) 2008-05-28
EP1862309B1 EP1862309B1 (en) 2012-09-12

Family

ID=38582290

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20070109333 Expired - Fee Related EP1862309B1 (en) 2006-05-31 2007-05-31 Sensor device

Country Status (3)

Country Link
EP (1) EP1862309B1 (en)
JP (1) JP2007327953A (en)
DE (1) DE102006025324A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20210187503A1 (en) * 2019-12-19 2021-06-24 Personal Genomics Taiwan, Inc. Apparatus and system for single-molecule nucleic acids detection

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008020505A1 (en) 2008-04-23 2009-10-29 Zind, Oliver, Dipl.-Ing. Image recording and color measurement system
DE102022134232A1 (en) 2022-12-20 2024-06-20 Manroland Goss Web Systems Gmbh Device and method for determining colour densities

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4136461A1 (en) 1991-11-06 1993-05-19 Roland Man Druckmasch METHOD AND DEVICE FOR LARGE-SCALE IMAGE INSPECTION
DE102004033495A1 (en) 2004-01-25 2005-08-11 Man Roland Druckmaschinen Ag Synchronised electronic camera operation procedure for printing machines reads part sets of lines independently on each camera in set order

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT390684B (en) * 1985-10-14 1990-06-11 Oesterr Nationalbank METHOD AND DEVICE FOR DETECTING PRINT IMAGE ERRORS ON TEST UNITS, IN PARTICULAR ON BANKNOTES
DE4321177A1 (en) * 1993-06-25 1995-01-05 Heidelberger Druckmasch Ag Device for parallel image inspection and color control on a printed product
DE19850335B4 (en) * 1998-11-02 2008-06-05 Metso Paper Automation Oy Device for detecting properties of a longitudinally transported web
EP1445099A1 (en) * 2003-02-10 2004-08-11 Kba-Giori S.A. Sensor

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4136461A1 (en) 1991-11-06 1993-05-19 Roland Man Druckmasch METHOD AND DEVICE FOR LARGE-SCALE IMAGE INSPECTION
DE102004033495A1 (en) 2004-01-25 2005-08-11 Man Roland Druckmaschinen Ag Synchronised electronic camera operation procedure for printing machines reads part sets of lines independently on each camera in set order

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20210187503A1 (en) * 2019-12-19 2021-06-24 Personal Genomics Taiwan, Inc. Apparatus and system for single-molecule nucleic acids detection

Also Published As

Publication number Publication date
EP1862309A3 (en) 2008-05-28
JP2007327953A (en) 2007-12-20
EP1862309B1 (en) 2012-09-12
DE102006025324A1 (en) 2007-12-13

Similar Documents

Publication Publication Date Title
DE102005018855B4 (en) Apparatus for inspecting printed products
DE4136461C2 (en) Device and method for large-scale image inspection
EP0228500B2 (en) Method of and device for contactless measurement of the wheel profile of the wheels of railway wheel sets
DE69929901T2 (en) INSPECTION SYSTEM FOR THE SURFACE OF CYLINDRICAL OBJECTS
EP0884182B1 (en) Process for regulating operations carried out by a printing machine
EP2728305B1 (en) Method and light patterns for measuring the height or the height curve of an object
DE69300199T2 (en) Device for the detection of printing errors in a rotating printing machine.
DE2947791C2 (en) Device for color monitoring of sheet-like or web-shaped materials in motion, in particular the printing materials of printing machines
EP0847187B1 (en) Scanning apparatus for picture-element-wise photoelectric measurement of a measured object
DE2256736B2 (en) Measuring arrangement for the automatic testing of the surface quality and evenness of a workpiece surface
WO1997037329A1 (en) Process and device for assessing the quality of processed material
DE102007030571B4 (en) Color measuring device with two different measuring devices
DE19607258A1 (en) Object size and/or position determination device
EP1862309B1 (en) Sensor device
EP2208987B1 (en) Method and device for visual surface inspection
DE4105456C2 (en) Device for the optical monitoring of printed products
DE102007018204B4 (en) Device for detecting defects in animal hides
DE102009023948B4 (en) Device for detecting a mark on a flat object and method therefor, and device for separating sections from a flat object
DE3413605C2 (en)
DE102004003614B4 (en) Apparatus and method for detecting a predetermined pattern on a moving printed matter
DE102016104917A1 (en) Device and system for calibrating a camera
EP3510877A2 (en) Device and method for inspecting rod-shaped items for the tobacco industry
DE3920669C2 (en)
DE102004001338A1 (en) Method and device for controlling events in synchronism with a moving material web
WO2024133208A1 (en) Method for optically inspecting an object, and corresponding inspection device

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

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC MT NL PL PT RO SE SI SK TR

AX Request for extension of the european patent

Extension state: AL BA HR MK YU

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC MT NL PL PT RO SE SI SK TR

AX Request for extension of the european patent

Extension state: AL BA HR MK RS

17P Request for examination filed

Effective date: 20080925

17Q First examination report despatched

Effective date: 20081103

AKX Designation fees paid

Designated state(s): DE FR GB IT

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE FR GB IT

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

Ref country code: DE

Ref legal event code: R081

Ref document number: 502007010530

Country of ref document: DE

Owner name: KOENIG & BAUER AG, DE

Free format text: FORMER OWNER: KOENIG & BAUER AKTIENGESELLSCHAFT, 97080 WUERZBURG, DE

REG Reference to a national code

Ref country code: DE

Ref legal event code: R096

Ref document number: 502007010530

Country of ref document: DE

Effective date: 20121108

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

Effective date: 20130613

REG Reference to a national code

Ref country code: DE

Ref legal event code: R097

Ref document number: 502007010530

Country of ref document: DE

Effective date: 20130613

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 9

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

Ref country code: GB

Payment date: 20150518

Year of fee payment: 9

Ref country code: DE

Payment date: 20150624

Year of fee payment: 9

REG Reference to a national code

Ref country code: DE

Ref legal event code: R081

Ref document number: 502007010530

Country of ref document: DE

Owner name: KOENIG & BAUER AG, DE

Free format text: FORMER OWNER: KOENIG & BAUER AKTIENGESELLSCHAFT, 97080 WUERZBURG, DE

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

Ref country code: IT

Payment date: 20150527

Year of fee payment: 9

Ref country code: FR

Payment date: 20150518

Year of fee payment: 9

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 502007010530

Country of ref document: DE

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20160531

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

Ref country code: IT

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

Effective date: 20160531

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20170131

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: 20161201

Ref country code: FR

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

Effective date: 20160531

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

Ref country code: GB

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

Effective date: 20160531