EP1619154B1 - Dispositif pour la synchronisation d'un cycle d'opération d'un dispositif avec une séquence de mouvement d'un matériau se déplaçant selon une direction donnée et méthode pourl'utilisation de ce dispositif - Google Patents

Dispositif pour la synchronisation d'un cycle d'opération d'un dispositif avec une séquence de mouvement d'un matériau se déplaçant selon une direction donnée et méthode pourl'utilisation de ce dispositif Download PDF

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Publication number
EP1619154B1
EP1619154B1 EP05106286A EP05106286A EP1619154B1 EP 1619154 B1 EP1619154 B1 EP 1619154B1 EP 05106286 A EP05106286 A EP 05106286A EP 05106286 A EP05106286 A EP 05106286A EP 1619154 B1 EP1619154 B1 EP 1619154B1
Authority
EP
European Patent Office
Prior art keywords
image
image sensor
evaluation unit
distance
illumination source
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.)
Not-in-force
Application number
EP05106286A
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German (de)
English (en)
Other versions
EP1619154A3 (fr
EP1619154A2 (fr
Inventor
Bernd Stöber
Volker Lohweg
Thomas Hochrein
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 EP1619154A2 publication Critical patent/EP1619154A2/fr
Publication of EP1619154A3 publication Critical patent/EP1619154A3/fr
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Publication of EP1619154B1 publication Critical patent/EP1619154B1/fr
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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
    • B65H23/00—Registering, tensioning, smoothing or guiding webs
    • B65H23/04—Registering, tensioning, smoothing or guiding webs longitudinally
    • B65H23/18—Registering, tensioning, smoothing or guiding webs longitudinally by controlling or regulating the web-advancing mechanism, e.g. mechanism acting on the running web
    • B65H23/188—Registering, tensioning, smoothing or guiding webs longitudinally by controlling or regulating the web-advancing mechanism, e.g. mechanism acting on the running web in connection with running-web
    • B65H23/1882—Registering, tensioning, smoothing or guiding webs longitudinally by controlling or regulating the web-advancing mechanism, e.g. mechanism acting on the running web in connection with running-web and controlling longitudinal register of web
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F13/00—Common details of rotary presses or machines
    • B41F13/02—Conveying or guiding webs through presses or machines
    • B41F13/025—Registering devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F33/00—Indicating, counting, warning, control or safety devices
    • B41F33/0081—Devices for scanning register marks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41P—INDEXING SCHEME RELATING TO PRINTING, LINING MACHINES, TYPEWRITERS, AND TO STAMPS
    • B41P2233/00—Arrangements for the operation of printing presses
    • B41P2233/50—Marks on printed material
    • B41P2233/52—Marks on printed material for registering
    • 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
    • B65H2511/10—Size; Dimensions
    • B65H2511/135—Surface texture; e.g. roughness
    • 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
    • B65H2513/00—Dynamic entities; Timing aspects
    • B65H2513/50—Timing
    • 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
    • B65H2553/41—Photoelectric detectors
    • B65H2553/414—Photoelectric detectors involving receptor receiving light reflected by a reflecting surface and emitted by a separate emitter
    • 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
    • B65H2553/41—Photoelectric detectors
    • B65H2553/416—Array arrangement, i.e. row of emitters or detectors
    • 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
    • B65H2553/00—Sensing or detecting means
    • B65H2553/40—Sensing or detecting means using optical, e.g. photographic, elements
    • B65H2553/45—Scanning means

Definitions

  • the invention relates to a device for synchronizing a working cycle of a device with a sequence of movement of a moving material along a movement path according to the preamble of claim 1 and a method of using this device according to the preamble of claim 75.
  • Such devices are known, for example from the DE 103 38 973 discloses a device according to the preamble of claim 1 and from the DE 196 31 747 A1 and the US 2004/030431 ,
  • z. B. a web-fed printing press or a sheet-fed press, especially in an offset printing press
  • the problem arises that with a movement of a moving through the printing press substrate z. B. involved in the manufacturing process of a printed product to be produced by the printing product or to monitor the printing process for quality control or to support a printing device of the printing press to synchronize or at least to control.
  • the movement of the printing material through the printing press in the case of a web-like configuration of the printing material z. B. at a speed between 10 m / s and 12 m / s or in the case of an arcuate configuration of the substrate z. B. between 15,000 sheets / h and 18,000 sheets / h or in each case with even greater speed values.
  • a printing process monitoring device may be a sensor system, wherein the sensor system z. B. is formed as an imaging system, wherein the imaging system z. B. has a line scan camera, wherein the line scan camera with at least one line of photosensitive sensor elements directed transversely to the transport direction of the printing material at least from a part of a surface of the Substrate line by line takes a picture.
  • the image lines taken sequentially by the line scan camera only lead to a meaningful image of the surface of the printing material if the individual recorded image lines always correlate with traveled distances of the same length directed by the moving printing material in its transport direction, ie if the individual recorded image lines follow one another as equidistantly as possible and map in their juxtaposition as completely as possible at least part of the surface of the printing material.
  • To synchronize a line scan camera with the movement of the printing material it is necessary that the signal synchronizing the process of image recording already after very short distances traveled by the substrate and thus after a very short time, if z. B. the same applied to the substrate printed image should be at least almost completely imaged by a sequence of image lines.
  • the length of such a route is usually measured in the range of significantly less than 1 mm.
  • An involved in the manufacturing process of the printed matter device may alternatively or additionally z. B. also be a perforator, in particular a laser perforator, with each of which a perforation is introduced into the substrate to the division in constant sections, which in turn leads to good results, if the perforator is activated at precisely such times, after the substrate each distance of equal length have been covered.
  • a perforator in particular a laser perforator
  • a signal with which the device to be synchronized with the movement of the printing material can be synchronized, z. B. be obtained by that with a rotary body of the printing machine, in particular a printing material-carrying cylinder or a printing material-carrying roller, a rotary encoder is connected, wherein the rotary encoder in response to the rotation of the rotary body provides a correlated with a distance traveled by the printing material signal, the signal from a control device for controlling the synchronizing device is used.
  • a control device for controlling the synchronizing device is used.
  • a rotary encoder provides erroneous results as soon as a slip occurs between the surface of the printing material and the lateral surface of the rotary body, which can not be excluded in particular if the printing material wraps around the rotary body only partially, but in the manufacturing process of the printed product in the printing press Is the rule. Also, the rotating body may wear out in the manufacturing process of the printed product, resulting in a change in its circumferential length. For these reasons, it is not guaranteed that the signal generated by the encoder continued reliable with the actual distance traveled by the substrate with the z. B. correlated to the synchronization of a line scan camera or a perforator required accuracy.
  • a rotary encoder also fails z. B. on a sheet-fed press, in which the substrate is transported after passing through the last printing unit by a guided on a chain system gripper system, because this predominantly does not provide a suitable rotational body having transport path virtually no way to arrange the encoder.
  • the generation of the signal required for synchronization should also z. B. be possible for a stamped by a pure linear motion movement of the printing material.
  • JP 10038901 A Due to the disadvantages associated with the motion detection of the printing material by means of a rotary encoder attached to a rotary body is in the JP 10038901 A has proposed a non-contact speed measuring device, wherein a CCD area image sensor of a portion of a material web through a focused on the surface of the web of material takes an image and an image processor evaluates an output signal of the image sensor in a high-pass process with respect to a speed of the material web.
  • a control or even a synchronization of a high-precision device depending on a distance covered by the printing material is with that in the JP 10038901 A described speed measuring device neither possible nor is there any indication.
  • the present invention contemplates that the basis of synchronization of a high precision device with a path traveled by the substrate is a real time accurate determination of the distance traveled along the path of movement of the substrate.
  • the determination of the length of the distance must be carried out very quickly and virtually without delay in view of the high speed at which the movement of the printing material through the printing press.
  • DE 35 02 406 A1 are a method and a device for the continuous, non-contact determination of the length of an undivided, moving body, in particular a continuous casting material, known with optically specific surface structure, with an optical device at two different times each a snapshot is taken and stored by the moving body, wherein the two snapshots coincide with each other except for an offset caused by the movement of the body, a partial length of the body being determined from the offset, this determination occurring cyclically at high speed, and the measuring signal being from a computing unit for controlling a cutting device connected downstream of said length measuring device can be used.
  • the invention has for its object to provide a device for synchronizing a working cycle of a device with a movement of a moving material along a movement path and a method for using this device, wherein the device, the determination of a distance traveled by the substrate at high speed distance in real time performed with high accuracy.
  • a distance traveled by the material along a path of movement can be reliably determined with high accuracy even for a very short length of the path even when the material is at a very high speed emotional.
  • the determination of the distance covered by the material is non-contact and thus wear-free, both on a plane and on a curved surface of the material.
  • a signal is generated in the preferred embodiment, for. B. involved in the manufacturing process of the printing product to be produced by the printing press or monitoring the printing process or promoting the printing material or any other high-precision device of the printing press with the distance covered by the material to synchronize or at least control.
  • the proposed device can be realized inexpensively.
  • a lighting device is provided which favors the measurement made by the image sensor by a change in contrast or a contrast enhancement.
  • a correction signal can be generated either to correct the movement of the material or to track an image taken by the device.
  • the device for determining a distance S traveled by a moving material 01 along a movement path B has an image sensor 06, wherein the material 01 is a surface 02 parallel to the movement path B, ie surface 02 lying in the plane of the movement path B with at least one structure 03 wherein the image sensor 06 images the same structure 03 in an image at at least two discrete successive times in a respective same magnification and directs image data 18 correlating with the respective image to an evaluation unit 07, the image data 18 generated at different times in FIG Relation to each other due to the movement of the material 01 have a displacement of the structure 03.
  • the evaluation unit 07 preferably calculates mathematically from the displacement of the structure 03, taking into account the magnification of the distance traveled by the material 01 distance S.
  • Known, fixed, ie unchangeable mechanical relationships z. B. in the pixel arrangement of the image sensor 06 can be used in the evaluation of the image data 18 to quantify the distance traveled by the material 01 distance S as a mechanical reference or scale.
  • the evaluation unit 07 sets, after a distance S traveled by the material 01, preferably at distances S of the same length traveled by the material 01, a signal 08 for the synchronization of an operation to be synchronized with the distance S traveled by the material 01.
  • the remote from the evaluation unit 07 and optionally processed signal 08 thus has the effect of a clock 09.
  • the at least one device 12 is thus a device 12 operating in a work cycle to be synchronized, ie, the workflow of this Device 12 is subdivided into a multiplicity of recurring sections, wherein a length or duration of these sections is to be matched to the movement sequence of the material 01 moved along a movement path B. For example, exactly one working cycle of the device 12 takes place after each distance S traveled by the material 01.
  • the at least one device 12 is z. B. as a material 01 in its processing process monitoring, processing or conveying device 12 is formed.
  • the device 12 is designed as a line scan camera 12 or as a perforator 12, preferably as a laser perforator 12.
  • the signal 11 provided by the clock 09 may also be used to synchronize a plurality of devices 12 with the distance S traveled by the material 01 of the material 01 moved along the path of movement B, e.g. B. a line scan camera 12 and a perforator 12 or another the material 01 in its processing process monitoring, processing or conveying device 12th
  • the material 01 is preferably a substrate 01, the z. B. in the form of a web of material 01, z. B. a paper web 01 or a film 01, or a sheet 01 or more successively to be printed sheet 01 is formed.
  • the in the Fig. 1 indicated by an arrow trajectory B of the material 01 may be rectilinear or curved along a curved line.
  • the movement path B of the material 01 runs within a printing press operating in an offset printing method, wherein the movement path B can also run along at least part of a lateral surface of a roller arranged in the printing press or of a cylinder arranged there.
  • the surface 02 of the material 01 is flat or curved, in particular convex.
  • the structure 03 of the material 01 preferably consists of a structure consisting of microscopic parts, for. B. of fibers of the printing material 01, in particular of paper fibers, from a on the surface 02 of the material 01 applied one or more layer coating, for. B. from an applied printing ink or from a plurality successively printed on one another printing inks, or from an application of the material 01.
  • the structure 03 of the material 01 preferably forms from the surface 02 of the material 01 exalted protruding or deepened in it relief.
  • the image sensor 06 is z. B. as a surface image sensor 06, preferably formed as a CCD chip having surface camera 06.
  • the image sensor 06 is designed, in particular, as an area camera 06 with a partially readable CMOS image sensor, wherein an image field of the area camera 06 can be adjusted, in particular, limited in size.
  • the size of the image field of the area camera 06 can be adapted in particular to a refresh rate of the area camera 06.
  • the image field of the image sensor 06 can therefore have different operating positions.
  • the projected onto the image field of the image sensor 06 part 14 of the surface 02 of the material 01 determined for the preferably stationary image sensor 06 a scanning 14.
  • the at least one device for determining a distance S traveled by the moving material 01 along the movement path B thus operates in any case with respect to the surface 02 of the material 01 without contact.
  • the distance A13 measures in the range between 10 mm and 1,000 mm, preferably between 50 mm and 400 mm.
  • the optical system 13 forms the part 14 of the surface 02 of the material 01, in particular the structure 03 contained in this part 14 of the surface 02 of the material 01, at a plurality of successive discrete points in time at an identical magnification on the image field of the image sensor 06 , Due to the small size of the structure 03, the magnification is selected such that the image of the structure 03 on the image field of the image sensor 06 on a scale of 1: 1 or even in the form of an enlargement.
  • the image sensor 06 has a suitable resolution with regard to its pixels, at least in its image field.
  • the optics 13 is z. B. formed as a telecentric lens, so that a z. B.
  • the image of the structure 03 on the image field of the image sensor 06 is not possible or only very slightly changed.
  • the use of a telecentric optics 13 is advantageous because a telecentric optics 13 a slight distance variation, as they are in the transport of very thin, soft material 01 z. B. may occur due to vibrations and / or wave formation compensated, which is why z. B. caused by vibrations and / or wave formation distance variations do not immediately lead to a negative impact on the measurement result.
  • the use of a telecentric optical system 13 also enables an error-free detection of the surface 02 of a material 01 guided along a curved or arched trajectory B.
  • the use of a telecentric optical system 13 saves a tracking of the measuring distance, ie in particular of the distance A13. Because of the distance tolerance of the telecentric optics 13 is also a recalibration z. B. the image data 18 of the image sensor 06 evaluating evaluating unit 07 is not required.
  • the evaluation unit 07 determines the distance S traveled by the material 01.
  • a lateral displacement to the movement path B of the material 01 can also be ascertained, in that the evaluation unit 07 determines the direction of the displacement and optionally the extent of the lateral offset of the structure 03 detected from the displacement.
  • the evaluation unit 07 can provide a further signal 19, optionally after a corresponding preparation or amplification, available, which correlates with the lateral offset of the structure 03 and thus also with the structure 03 having stationary material 01, wherein this signal 19 thereto it is possible to use at least one further device, in particular the high precision device 12.
  • the two-dimensional image field of the image sensor 06 can also be used to produce a precise, always similar image of the structure 03 by a lateral movement of the material 01 in the evaluating unit 07 evaluating the image data 18 of the image sensor 06 by applying a correction method, for. B. an image processing method, is computationally compensated, so that made by the evaluation unit 07 determination of the distance traveled by the material 01 distance S unaffected by the sideways movement of the material 01 takes place.
  • a Sideways movement of the material 01 may, for. B. be the result of tolerance-related, incorrectly adjusted, worn and / or even damaged guide elements for guiding the material 01.
  • An applicable correction method can provide for defining or redefining a start pixel of each image line of the image sensor 06 depending on the signal 19 correlating with the lateral offset of the structure 03, as soon as the signal 19 reaches a previously determined, e.g. B. reaches or exceeds the limit stored in the evaluation unit 07.
  • the signals required for the synchronization of the device 12 signals 08; 11 or the signal 19 required for controlling a device with respect to a lateral movement of the material 01 can therefore be provided in real time because the displacement of a structure 03 which does not change its shape along its displacement path can be evaluated quickly by the evaluation unit 07, wherein As already described, the displacement of image data 18 generated at two different points in time results in their relation to one another as a result of the movement of the material 01.
  • the structure 03 therefore remains unchanged in its shape at at least two different times at which the image sensor 06 images it.
  • the evaluation unit 07 After mapping the structure 03 on the image field of the image sensor 06 at a first time, the evaluation unit 07 only needs to determine which coordinates this now known structure 03 at a second time within the image field of the image sensor 06 and the change in the coordinates z. B. determine by a difference, the coordinates determine a position of at least a portion of the structure 03 within the image field of the image sensor 06.
  • the evaluation method applied by the evaluation unit 07 therefore requires that the image data 18 generated at at least two different times have a sufficient overlapping area with respect to the image field of the image sensor 06 having the structure 03, and that both image data 18 at least partially map the structure 03.
  • the image refresh rate of the image sensor 06 is preferably adapted to the speed of the moving material 01 or at least adaptable.
  • the distance S of the material 01 covered between two consecutive image recordings can have a limiting effect on the image refresh rate of the image sensor 06, because the successive image recordings must have the sufficient overlapping area mentioned, so that the displacement of the structure 03 within the Image field of the image sensor 06 can be determined.
  • an intermediate clock can be determined reliably by interpolation or extrapolation from previous image recordings.
  • the proposed device accordingly has the particular advantages that it quickly determines the distance S traveled by the moving material 01 due to the low evaluation time due to the method, and is also capable of detecting and quantifying a displacement of only a very short length. Therefore, the proposed device can also be used to synchronize picture lines of a line scan camera 12.
  • the image repetition rate of the image sensor 06 is significantly higher than the line clock of the line camera 12.
  • the length of the displacement vector of the evaluation of the evaluation unit 07 to be evaluated displacement of the structure 03 is also extremely small, if covered by the moving material 01 between two images S distance in the field a local blur of the to be controlled by the evaluation unit 07 device 12 is located.
  • the scanning location 14 of the image sensor 06 ie the part 14 of the surface 02 of the material 01 projected onto the image field of the image sensor 06, as close as possible to the location at which a device 12 to be synchronized or at least to be controlled the material 01 acts.
  • the scanning 14 of the image sensor 06 z. B. cover the line-shaped Abtastspur a synchronized line camera 12 at least partially.
  • At least the scanning location 14 of the image sensor 06 illuminating illumination source 21 is provided, wherein the illumination source 21 z. B. as a constant light source 21 or as a flash light source 21 is executed.
  • the brightness of the illumination source 21 or its flash duration or optionally also the exposure time of the image field of the image sensor 06 are z. B. adapted to the particular nature of the surface 02 of the material 01 or at least customizable.
  • the light color of the illumination source 21 and the color sensitivity of the image field of the image sensor 06 are advantageously chosen such that they are outside of that of the line scan camera 12 for their Image capture used spectral range are to avoid mutual interference of line scan camera 12 and image sensor 06.
  • the image recording of the line camera 12 z. B. takes place in the visible spectrum, for the color sensitivity of the image field of the image sensor 06 and the adapted light color of the illumination source 21, the range z. B. the infrared or ultraviolet radiation can be used.
  • the illumination source 21 is also like the image sensor 06 associated optics 13 spaced from the surface 02 of the material 01, for. B. at a distance A21, wherein the distance A21 from a mechanically movable element, for. B. by a handling device of the printing press, in particular by a gripper system, if necessary can be traversed.
  • the distance A21 measures z. B. in the area between 30 mm and 200 mm, preferably between 80 mm and 140 mm.
  • the illumination source 21 is arranged to the surface 02 of the material 01 such that the structure 03 is highlighted on the surface 02 of the material 01 with the light emitted by the illumination source 21.
  • the illumination source 21 is arranged with its optical axis 22 at an angle ⁇ to the optical axis 16 of the optical system 13, wherein the angle ⁇ z. B. between 0 ° and 90 °, in particular between 45 ° and 90 °.
  • the light irradiated by the illumination source 21 along its optical axis 22 at the angle ⁇ onto the surface 02 of the material 01 then generates a shadow of the structure 03, whereby image contrasts are enhanced.
  • a solid angle ⁇ at which the illumination source 21 emits its light is preferably narrow and is z. Between 0.00006 sr and 0.05 sr.
  • the illumination source 21 may be advantageous, wherein the arrangements z. B. at a distance A21 of the illumination source 21 from the surface 02 of the material 01 or at the angle ⁇ , the illumination source 21 with its optical axis 22 to the optical axis 16 of the optics 13 occupy different.
  • Two different arrangements of the illumination source 21 are in the Fig. 1 exemplified.
  • the evaluation unit 07 can control the operation and optionally also the operating position of the illumination source 21 with a signal 24 transmitted to a control device 23, the control device 23 in turn acting on the illumination source 21 with a corresponding signal 26.
  • a matte surface 02 of the material 01 and / or its structure 03 is an arrangement according to the Fig. 1 or 2 advantageous, wherein the optical axis 16 of the optics 13 with the surface 02 of the material 01 a Angle ⁇ of 90 ° and the angle ⁇ between the optical axis 16 of the optics 13 and the optical axis 22 of the illumination source 21 is selected to be greater than 45 °.
  • the light irradiated by the illumination source 21 onto the surface 02 of the material 01 then takes place as a grazing light.
  • a reflective surface 27 does not necessarily have to be arranged parallel to the other surface 02 of the material 01, as shown in FIG Fig. 3 is indicated by a dashed line and an orthogonal standing on her Lot 28.
  • the arrangement of the image sensor 06 and its associated illumination source 21 is preferably determined by the orientation of the largest surface portion of the surface 27.
  • Fig. 1 and 4 show a device with several, z. B. two illumination sources 21, which can be selectively used.
  • the evaluation unit 07 controls z. B. the control device 23, whereby a switchover between the illumination sources 21 takes place.
  • the illumination sources 21 each have different angles ⁇ 1 with their respective optical axis 22; ⁇ 2 to the surface 02; 27 of the material 01 on.
  • the in the Fig. 4 right illumination source 21 is preferably suitable for illuminating a shiny, reflective surface 02; 27, since with respect to the surface 02; 27 and the optical axis 16 of the image sensor 06 is arranged under the assumption incident angle equal to the angle of reflection, whereas in the Fig. 4 left illumination source 21 rather to illuminate a rough, dull Surface 02; 27 is suitable.
  • an evaluation of at least one image acquisition of the image sensor that is not required to generate the signal 08 can be performed Be used 06 that the proposed device automatically to a condition of the surface 02; 27 of the material 01 adapts. If the evaluation of at least one image acquisition of the image sensor 06 which is not required to generate the signal 08 shows that the image of the structure 03 is overexposed or underexposed on the image field of the image sensor 06, the evaluation unit 07 can be used, for example. B. adjust the brightness of the illumination source 21 or the flash duration or, optionally, alternatively, the exposure time of the image field of the image sensor 06 automatically.
  • the evaluation unit 07 can be used, for example.
  • This automatic adaptation of the proposed device is preferably carried out before the next required for generating the signal 08 image acquisition. Due to the automatic adaptation, the proposed device becomes a self-learning system.

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

Claims (77)

  1. Dispositif pour la synchronisation d'un cycle d'opération d'un dispositif (12) avec une séquence de mouvement d'un matériau (01) déplacé le long d'une trajectoire de déplacement (B), le matériau (01) déplacé le long de sa trajectoire de déplacement (B) dans sa séquence de mouvement parcourant au moins une distance (S), le matériau (01) présentant une surface (02), située dans le plan de la trajectoire de déplacement (B), avec au moins une structure (03), un capteur d'image (06) imageant la structure (03) chaque fois en une image, en au moins deux moments discrets successifs, le capteur d'image (06) guidant chaque fois, à une unité d'évaluation (07), des données image (18) en corrélation avec l'image respective, où, au moment de sa représentation imagée subséquente, par suite du déplacement du matériau (01), la structure (03) est décalée par rapport au moment de sa représentation imagée précédente, l'unité d'évaluation (07) déterminant la distance (S) parcourue par le matériau (01) à partir du déplacement de la structure (33), l'unité d'évaluation (07) produisant, selon la distance (S) parcourue par le matériau (01), un signal (08 ; 11) servant à la synchronisation du cycle d'opération du dispositif (12), caractérisé en ce que le dispositif (12), dont le cycle d'opération est synchronisé par le signal (08 ; 11) de l'unité d'évaluation (07), est réalisé sous forme d'au moins une caméra à balayage de lignes (12), la caméra à balayage de lignes (12) enregistrant en mode ligne, dans son cycle d'opération, une image d'au moins une partie de la surface (02) du matériau (01).
  2. Dispositif selon la revendication 1, caractérisé en ce que le capteur d'image (06) image la structure (03), imagée en au moins deux moments discrets successifs, à une échelle de représentation imagée chaque fois identique à ces moments, chaque fois dans une image.
  3. Dispositif selon la revendication 2, caractérisé en ce que l'unité d'évaluation (07) détermine la distance (S) parcourue par le matériau (01), à partir du déplacement de la structure (03), en prenant en considération l'échelle de représentation imagée.
  4. Dispositif selon la revendication 1, caractérisé en ce que le taux de répétition d'image du capteur d'image (06) est plus élevé que la cadence de ligne de la caméra à balayage de ligne (12).
  5. Dispositif selon la revendication 1, caractérisé en ce que l'unité d'évaluation (07) produit chaque fois, pour des distances (S) de même longueur, parcourues par le matériau (01), le signal (08 ; 11) servant à la synchronisation de la caméra à balayage de ligne (12) avec la distance (S) parcourue du matériau (01).
  6. Dispositif selon la revendication 1, caractérisé en ce que l'unité d'évaluation (07) synchronise ou au moins commande, par son signal (08 ; 11), un autre dispositif (12) travaillant avec une haute précision.
  7. Dispositif selon la revendication 6, caractérisé en ce que l'unité d'évaluation (07) commande, par son signal (08 ; 11), un autre dispositif (12), surveillant, travaillant ou transportant le matériau (01).
  8. Dispositif selon la revendication 6, caractérisé en ce que l'autre dispositif (12) est réalisé sous forme de perforateur (12).
  9. Dispositif selon la revendication 1, caractérisé en ce que le matériau (01) est un matériau à imprimer (01).
  10. Dispositif selon la revendication 1, caractérisé en ce que le matériau (01) est une bande de matériau (01).
  11. Dispositif selon la revendication 1, caractérisé en ce que le matériau (01) est une feuille (01).
  12. Dispositif selon la revendication 1, caractérisé en ce que le matériau (01) est composé de plusieurs feuilles (01) à imprimer ou imprimées les unes après les autres.
  13. Dispositif selon la revendication 1, caractérisé en ce que la trajectoire de déplacement (B) du matériau (01) est rectiligne ou s'étend le long d'une ligne incurvée.
  14. Dispositif selon la revendication 1, caractérisé en ce que la trajectoire de déplacement (B) du matériau (01) s'étend dans une machine à imprimer.
  15. Dispositif selon la revendication 1, caractérisé en ce que la trajectoire de déplacement (B) du matériau (01) s'étend le long d'au moins une partie d'une surface d'enveloppe d'un rouleau ou d'un cylindre.
  16. Dispositif selon la revendication 1, caractérisé en ce que la surface (02) du matériau (01) est plane ou incurvée.
  17. Dispositif selon la revendication 16, caractérisé en ce que la surface (02) du matériau (01) est dotée d'une incurvation convexe.
  18. Dispositif selon la revendication 1, caractérisé en ce que la structure (03) du matériau (01) est réalisée sous forme d'une texture composée de parties microscopiquement petites.
  19. Dispositif selon la revendication 1, caractérisé en ce que la structure (03) du matériau (01) est composée de ses fibres.
  20. Dispositif selon la revendication 1, caractérisé en ce que la structure (03) du matériau (01) est composée d'un revêtement à une couche ou à plusieurs couches, appliqué sur la surface (02) du matériau (01).
  21. Dispositif selon la revendication 1, caractérisé en ce que la structure (03) du matériau (01) est composée d'une application du matériau (01).
  22. Dispositif selon la revendication 1, caractérisé en ce que la structure (03) du matériau (01) constitue un relief ressortant de la surface (02) du matériau (01) ou creusé en elle.
  23. Dispositif selon la revendication 1, caractérisé en ce que le capteur d'image (06) est réalisé sous forme de capteur d'image matriciel (06).
  24. Dispositif selon la revendication 1, caractérisé en ce que le capteur d'image (06) est réalisé sous forme de caméra matricielle (06).
  25. Dispositif selon la revendication 1, caractérisé en ce que le capteur d'image (06) présente une puce électronique à éléments CCD.
  26. Dispositif selon la revendication 1, caractérisé en ce que le capteur d'image (06) est réalisé sous forme de capteur d'image CMOS.
  27. Dispositif selon la revendication 1, caractérisé en ce que le capteur d'image (06) présente un champ image susceptible d'être lu partiellement.
  28. Dispositif selon la revendication 1, caractérisé en ce que le capteur d'image (06) présente un champ image d'une grandeur adaptable.
  29. Dispositif selon la revendication 28, caractérisé en ce que la grandeur du champ image est adaptable ou adaptée à un taux de répétition d'image du capteur d'image (06).
  30. Dispositif selon la revendication 1, caractérisé en ce que le capteur d'image (06) donne une représentation imagée de la structure (03) sur son champ image à l'échelle 1:1.
  31. Dispositif selon la revendication 1, caractérisé en ce que le capteur d'image (06) donne une représentation imagée agrandie de la structure (03) sur son champ image.
  32. Dispositif selon la revendication 1, caractérisé en ce qu'une optique (13), disposée entre la surface (02) du matériau (01) et la capteur d'image (06), projette une partie (14) de la surface (02) du matériau (01) le long d'un axe (16) optique sur le champ image du capteur d'image (06).
  33. Dispositif selon la revendication 32, caractérisé en ce que la partie (14) projetée de la surface (02) du matériau (01) est de forme rectangulaire.
  34. Dispositif selon la revendication 32, caractérisé en ce que l'axe (16) optique forme, avec la surface (02) du matériau (01), un angle (γ) dans la fourchette comprise entre 45° et 90°.
  35. Dispositif selon la revendication 32, caractérisé en ce que l'optique (13) est réalisée sous forme d'un objectif télécentrique.
  36. Dispositif selon la revendication 32, caractérisé en ce que l'optique (13) est disposée, avec sa face frontale (17) tournée vers la surface (02) du matériau (01), à une distance (A13) de la surface (02) du matériau (01).
  37. Dispositif selon la revendication 36, caractérisé en ce que la distance (A13), de la face frontale (17) de l'optique (13) à la surface (02) du matériau (01), est dans la fourchette comprise entre 10 mm et 1.000 mm.
  38. Dispositif selon la revendication 36, caractérisé en ce que la distance (A13), de la face frontale (17) de l'optique (13) à la surface (02) du matériau (01), est dans la fourchette comprise entre 50 mm et 400 mm.
  39. Dispositif selon la revendication 1, caractérisé en ce que le taux de répétition d'image du capteur d'image (06) est adapté ou au moins adaptable à la vitesse du matériau (01) déplacé.
  40. Dispositif selon la revendication 1, caractérisé en ce que la configuration de la structure reste inchangée, aux au moins deux moments différents auxquels le capteur d'image (06) la représente.
  41. Dispositif selon la revendication 1, caractérisé en ce qu'au moins deux des données image (18), générées à des moments différents, donnent une représentation imagée au moins partielle de la structure (03).
  42. Dispositif selon la revendication 1, caractérisé en ce qu'au moins deux des données image (18), générées à des moments différents, présentent une zone de chevauchement quant au champ image, présentant la structure (03), du capteur d'image (06).
  43. Dispositif selon la revendication 1, caractérisé en ce que l'unité d'évaluation (17) détermine une modification de coordonnées, les coordonnées déterminant une position au moins d'une partie de la structure (03) à l'intérieur eu champ image du capteur d'image (06), la modification à déterminer résultant d'une différence entre les coordonnées de la structure (03) enregistrée à un premier et à un deuxième moment sur le champ image du capteur d'image (06).
  44. Dispositif selon la revendication 1, caractérisé en ce que l'unité d'évaluation (17) détermine la direction du déplacement.
  45. Dispositif selon la revendication 44, caractérisé en ce que l'unité d'évaluation (17) détermine la valeur d'un décalage latéral, identifié à partir du déplacement, de la structure (03).
  46. Dispositif selon la revendication 45, caractérisé en ce que l'unité d'évaluation (17) met à disposition un signal (19) corrélé au décalage latéral de la structure (03).
  47. Dispositif selon la revendication 46, caractérisé en ce que l'unité d'évaluation (17) commande la au moins un dispositif (12) avec le signal (19) mis en corrélation avec le décalage latéral de la structure (03).
  48. Dispositif selon la revendication 1, caractérisé en ce que la partie (14), projetée sur le champ image du capteur d'image (06), de la surface (02) du matériau (01) est disposé à proximité de l'emplacement auquel le dispositif (12) à synchroniser ou au moins à commander agit sur le matériau (01).
  49. Dispositif selon la revendication 1, caractérisé en ce que la partie (14), projetée sur le champ image du capteur d'image (06), de la surface (02) du matériau (01) et une piste d'exploration en balayage en forme de ligne de la caméra à balayage de ligne (12) à synchroniser se chevauchent au moins partiellement.
  50. Dispositif selon la revendication 1, caractérisé en ce qu'une source d'éclairage (21), éclairant au moins l'emplacement de balayage (14) du capteur d'image (06), est prévue.
  51. Dispositif selon la revendication 50, caractérisé en ce que la source d'éclairage (21) est réalisée sous la forme d'une source de lumière constante (21).
  52. Dispositif selon la revendication 50, caractérisé en ce que la source d'éclairage (21) est réalisée sous la forme d'une source de lumière à éclats (21).
  53. Dispositif selon la revendication 50 ou 52, caractérisé en ce que la clarté de la source d'éclairage (21) ou sa durée d'éclat est adaptée ou au moins adaptable à l'état de la surface (02) du matériau (01).
  54. Dispositif selon la revendication 1, caractérisé en ce que la durée d'éclairage du champ image du capteur d'image (06) est adapté ou au moins adaptable à l'état de la surface (02) du matériau (01).
  55. Dispositif selon la revendication 50, caractérisé en ce que, en cas d'un recouvrement au moins partiel de l'emplacement de balayage (14) du capteur d'image (06) et de la piste de balayage de la caméra à balayage de ligne (12) à synchroniser, la couleur de lumière de la source d'éclairage (21) et la sensibilité chromatique du champ d'image du capteur d'image (06) sont hors de la plage spectrale utilisée par la caméra à balayage de ligne (12) pour sa détection d'image.
  56. Dispositif selon la revendication 50, caractérisé en ce que la couleur de lumière de la source d'éclairage (21) et la sensibilité chromatique du champ d'image du capteur d'image (06) sont dans la plage du rayonnement infrarouge ou ultraviolet.
  57. Dispositif selon la revendication 50, caractérisé en ce que la source d'éclairage (21) est disposée à une distance (A21) de la surface (02) du matériau (01).
  58. Dispositif selon la revendication 57, caractérisé en ce que la distance (A21) est dans la fourchette comprise entre 30 mm et 200 mm.
  59. Dispositif selon la revendication 57, caractérisé en ce que la distance (A21) est dans la fourchette comprise entre 80 mm et 140 mm.
  60. Dispositif selon la revendication 50, caractérisé en ce que la source d'éclairage (21) est disposée avec son axe (22) optique orienté sous un angle (α) par rapport à l'axe (16) optique de l'optique (13).
  61. Dispositif selon la revendication 60, caractérisé en ce que l'angle (α) est dans la fourchette comprise entre 0° et 90°.
  62. Dispositif selon la revendication 60, caractérisé en ce que l'angle (α) est dans la fourchette comprise entre 45° et 90°.
  63. Dispositif selon la revendication 50, caractérisé en ce qu'un angle solide (ω), sous lequel la source d'éclairage (21) irradie sa lumière, est dans la fourchette comprise entre 0,00006 sr et 0,05 sr.
  64. Dispositif selon la revendication 50, caractérisé en ce que la lumière irradiée par la source d'éclairage (21) sous un angle d'incidence (1/2 α) sur la surface (02) du matériau (01), frappe le champ image du capteur d'image (06) sous un angle de sortie (1/2 α) correspondant au moins à peu près à l'angle d'incidence (1/2 α).
  65. Dispositif selon la revendication 50, caractérisé en ce que, dans le cas d'une surface (27) plane et non homogène à l'emplacement de balayage (14), l'agencement du capteur d'image (06) et de la source d'éclairage (21) lui étant associée, est déterminé par l'orientation de la proportion maximale de surface de la surface (27).
  66. Dispositif selon la revendication 50, caractérisé en ce qu'au moins deux sources d'éclairage (21) sont prévues, l'axe (22) optique respectif des sources d'éclairage (21) formant des angles (β1 ; β2) différents par rapport à la surface (02 ; 27) du matériau (01).
  67. Dispositif selon la revendication 66, caractérisé en ce que les au moins deux sources d'éclairage (21) sont susceptibles d'être mises en service au choix.
  68. Dispositif selon la revendication 66, caractérisé en ce qu'un dispositif de commande (23), commandé par l'unité d'évaluation (07), met en service au choix les au moins deux sources d'éclairage (21).
  69. Dispositif selon la revendication 1, caractérisé par une adaptation automatique à un état de la surface (02 ; 27) du matériau (01).
  70. Dispositif selon la revendication 69, caractérisé en ce que l'unité d'évaluation (07), avec au moins un enregistrement d'image, non nécessaire pour produire le signal (08) pour la synchronisation du processus à synchroniser avec la distance (S) parcourue du matériau (01), du capteur d'image (06) adapte le dispositif à un état de la surface (02 ; 27) du matériau (01), le taux de répétition d'image du capteur d'image (06) étant plus élevé que nécessaire pour produire le signal (08).
  71. Dispositif selon la revendication 70, caractérisé en ce que l'unité d'évaluation (07), en cas d'une surexposition d'éclairement ou en cas d'une sous-exposition d'éclairement de la au moins une représentation imagée, non nécessaire, de la structure (03) sur le champ image du capteur d'image (06), adapte chaque fois la luminosité de la source d'éclairage (21), ou sa durée d'éclat et/ou la durée d'éclairage du champ image du capteur d'image (06).
  72. Dispositif selon la revendication 66, caractérisé en ce que l'unité d'évaluation (07) met en service, au choix, la source d'éclairage (21) qui, pour la surface (02 ; 27) actuellement présente du matériau (01), produit le contraste d'image maximal pour la structure (03) reproduite de manière imagée sur le champ image du capteur d'image (06).
  73. Dispositif selon la revendication 69 ou 70, caractérisé en ce que l'unité d'évaluation (07) procède à l'adaptation avant l'enregistrement d'image immédiatement le suivant, nécessaire pour produire le signal (08).
  74. Dispositif selon la revendication 1, caractérisé en ce que l'unité d'évaluation (07) génère le signal (08 ; 11) pour la synchronisation du dispositif (12) à synchroniser avec la distance (S) parcourue du matériau (01), par une interpolation ou une extrapolation à partir des données image (18) générées à des moment différents.
  75. Procédé d'utilisation du dispositif selon l'une des revendications 1 à 74, caractérisé par un agencement du dispositif dans une machine à imprimer.
  76. Procédé selon la revendication 75, caractérisé par un agencement du dispositif dans une machine à imprimer réalisée sous forme de machine à imprimer des bobines ou de machine à imprimer des feuilles.
  77. Procédé selon la revendication 75, caractérisé par un agencement du dispositif dans une machine à imprimer travaillant dans un procédé d'impression offset.
EP05106286A 2004-07-12 2005-07-11 Dispositif pour la synchronisation d'un cycle d'opération d'un dispositif avec une séquence de mouvement d'un matériau se déplaçant selon une direction donnée et méthode pourl'utilisation de ce dispositif Not-in-force EP1619154B1 (fr)

Applications Claiming Priority (1)

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DE102004033660A DE102004033660B4 (de) 2004-07-12 2004-07-12 Vorrichtung zur Ermittlung einer von einem bewegten Material entlang einer Bewegungsbahn zurückgelegten Strecke

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EP1619154A2 EP1619154A2 (fr) 2006-01-25
EP1619154A3 EP1619154A3 (fr) 2007-02-28
EP1619154B1 true EP1619154B1 (fr) 2010-09-01

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DE102007039373C5 (de) * 2007-08-21 2018-10-25 Koenig & Bauer Ag Verfahren zur Überwachung des Stranglaufes in einem Trichteraufbau einer Rotationsdruckmaschine
EP2269824B1 (fr) * 2009-07-01 2012-09-12 ELTROMAT GmbH Procédé et dispositif de surveillance de l'ajustement du traitement de matériaux en forme de bandes dans des installations
DE202010012725U1 (de) * 2010-09-16 2011-12-19 Emima Gmbh Ortsbestimmung eines bewegten Gegenstands
DE102012101310C5 (de) 2012-02-17 2014-09-04 Stephan Krebs Vorrichtung und Verfahren zur Druckbildkontrolle
DE102016220759A1 (de) * 2016-10-21 2018-04-26 Texmag Gmbh Vertriebsgesellschaft Verfahren und Vorrichtung zur Kompensation eines Materialbahnversatzes bei der Materialbahninspektion
DE102017213262B4 (de) * 2017-08-01 2022-09-22 Heidelberger Druckmaschinen Ag Bilderfassung mit bereichsweiser Bildauflösung

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DE3502406A1 (de) * 1985-01-22 1986-07-24 Dr. Peter + Steinwender Technische Geräte GmbH, 8176 Waakirchen Verfahren und einrichtung zur kontinuierlichen, beruehrungslosen bestimmung der laenge eines ungeteilten, bewegten koerpers
GB9214664D0 (en) * 1992-07-10 1992-08-19 Wiggins Teape Group Ltd Watermark detection
DE4428156A1 (de) * 1994-08-09 1995-08-10 Siemens Nixdorf Inf Syst Verfahren und Vorrichtung zur Bestimmung der Geschwindigkeit eines Aufzeichnungsträgers
JPH1038901A (ja) * 1996-07-19 1998-02-13 Futec Inc 非接触速度計
DE19631747A1 (de) * 1996-08-06 1997-09-11 Oce Printing Systems Gmbh Sensoreinrichtung zum Erfassen einer Markierung eines bewegten Endlos-Aufzeichnungsträgers in elektrofotografischen Druck- und Kopiereinrichtungen
SE9701911D0 (sv) * 1997-05-22 1997-05-22 Optronic Consult Ab Sätt och anordning för beröringsfri inmätning av förflyttning
EP1762388A3 (fr) * 2000-10-13 2012-08-29 Dainippon Screen Mfg. Co., Ltd. Presse équipée du dispositif de mesure des champs colotimétriques
US7130710B2 (en) * 2002-08-07 2006-10-31 Kimberly-Clark Worldwide, Inc. System and method for tracking and exploiting per station information from a multiple repeat manufacturing device
DE10338973B4 (de) * 2002-09-30 2013-01-31 Goss International Montataire S.A. Verfahren und Vorrichtung zur Störungserfassung beim Transport einer Materialbahn

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DE102004033660B4 (de) 2008-03-13
DE502005010163D1 (de) 2010-10-14
EP1619154A3 (fr) 2007-02-28
ATE479621T1 (de) 2010-09-15
DE102004033660A1 (de) 2006-02-09
EP1619154A2 (fr) 2006-01-25

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