CN101316709A - Method for detection of occurrence of printing errors on printed substrates during processing thereof on a printing press - Google Patents
Method for detection of occurrence of printing errors on printed substrates during processing thereof on a printing press Download PDFInfo
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- CN101316709A CN101316709A CNA2006800442250A CN200680044225A CN101316709A CN 101316709 A CN101316709 A CN 101316709A CN A2006800442250 A CNA2006800442250 A CN A2006800442250A CN 200680044225 A CN200680044225 A CN 200680044225A CN 101316709 A CN101316709 A CN 101316709A
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- 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
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Abstract
There is described a method for detection of occurrence of printing errors on printed substrates during processing thereof on a printing press (1) comprising the steps of providing multiple sensors on functional components of the printing press to monitor the behaviour of the printing press (1) during processing of the printed substrates and performing an in-line analysis of the behaviour of the printing press (1) to determine occurrence of a characteristic behaviour of the printing press (1) which leads or is likely to lead to occurrence of printing errors on the printed substrates or which leads or is likely to lead to good printing quality of the printed substrates. In-line analysis of the behaviour of the printing press (1) preferably includes performing fuzzy pattern classification of the behaviour of the printing press (1) . According to one embodiment of the proposed method in-line analysis of the behaviour of the printing press (1) is coupled with an in-line optical inspection of the printed substrates.
Description
Technical field
The present invention puts it briefly and relates to inspection to printed substrate quality processed on printing machine.More particularly, the present invention relates to checking linearity, promptly the present invention relates to during printing machine is handled, be used to survey the method that misprint takes place on printed substrate the printed substrate of for example printing sheets or roll web.The present invention be more particularly directed to the detection to misprint generation on the printed substrate that is used for the manufacturing of confidentiality file, this classified document is banknote particularly.
Background technology
During print product forms, to take certain measure to guarantee the printing quality of a certain degree generally speaking.Especially true at secret print field, wherein in this field, by end product be banknote, classified document or the like the quality standard that must reach very high.The printing product quality inspection is confined to the optical check of print product usually.This optical check can be used as off-line procedure to carry out, and promptly carries out after handling on the printing machine at print product, perhaps more frequently, carries out as linear process, promptly carries out on the printing machine of carrying out printing operation.
The optical checking system that mainly is suitable for the detailed inspection print product can have been bought on market.These check systems are general according to the inspection technique that is called as at present based on typical threshold, work in RGB three primary colors scope.This inspection technique is for example the 5th, 384, and is No. 859 and the 5th, 317, open in No. 390 United States Patent (USP)s.These open files disclose so-called image pixel difference or threshold value inspection technique, promptly based on the inspection technique to the analysis of PEL density difference between the sampled images of print product and the reference picture.Threshold parameter usually according to some master image relatively come to determine, determine mean value or standard deviation whereby in image local zone, and be summed up as corresponding threshold value or tolerance.These numerical value and tolerance then with compare being examined the real image numerical value of measuring on the sampled images of material.
Above-mentioned threshold value inspection technique presents some defectives, and these defectives will be discussed in more detail below.These inspection techniques can be revised, and with to the classified document inspection, yet are under certain condition.Directly be not suitable for the inspection of classified document based on the threshold value inspection technique, because classified document is to utilize specific printing process (for example intaglio printing) printing that is not used in commercial printing usually.Traditional specific print characteristics based on the therefore necessary adaptation classified document of threshold value inspection technique.
According to the current state in this field, owing to have a high production rate, therefore use image threshold image processing techniques (such) usually as in above-mentioned the 5th, 384, No. 859 and the 5th, 317, No. 390 United States Patent (USP)s, describing.Yet the defective that these methods have is, in process of production, yet is greatly that the deviation of permissible range can cause there is the false detection of intending error in the contrast sudden change zone in check image.In order to stop this false error of intending to occur, the described zone that sports feature with contrast generally is processed into error-detecting insensitive (promptly by high tolerance is summed up in the point that these zones), thereby can make checking process stable.Therefore error-detecting become and hardly may in the zone with contrast sudden change.
Other optical inspections are also known in the art.For example, European patent EP 0 730 959 and EP 0 985 531 disclose the inspection technique based on " elasticity " model, and wherein this inspection technique is considered may being out of shape of printed substrate.Can also know the perception inspection technique from No. 2004/017034 international patent application of WO and 102 08 No. 285 German patent applications of DE, this method is with basic mode simulating human visually-perceptible.Statistical method according to the image model statistical analysis also is well known in the art, but this method does not have well-content performance.
Above-mentioned optical check method by definition in inspection to the print product optical quality, for example whether have too much or very little printing ink apply on printed matter, whether the ink density of coating is acceptable, whether the spatial distribution of coating printing ink is correct or the like.Although these systems are used for surveying this misprint with relative effective means, yet known check system can not be carried out early detection to the misprint that forms gradually.This misprint is not to occur in unexpected mode, but occurs with progressive and accumulation mode.Usually degeneration or deviation occur these misprints gradually owing to the printing machine performance.When the optical checking system tolerance exceeds, because optical checking system presents the inspection tolerance inherently, misprint will only be detected after a certain period.
The characteristic noise that experienced press operator can for example produce according to printing machine can be identified at the aging or deviation that can cause misprint to occur on the printing machine performance.Yet this ability depends on technical staff's practical experience, technical know-how and the carefulness of operation printing machine very bigly.In addition, the ability of surveying this variation on the printing machine performance depends on that inevitably the office worker changes, and for example personnel reorganize, the key personnel leaves or retirement or the like.In addition,, therefore just exist the excessive risk that knowledge was lost along with time lapse because technical expertise is based on the people, unique effectively remedy be to guarantee to a kind of form or in addition correlation technique knowledge deposit and to technical staff's suitable training.
Summary of the invention
Therefore exist the needs to improved check system, wherein this check system not only is confined to print the optical check of end product, and considers other factors except optical quality standard.
General purpose of the present invention thus is to improve known inspection technology, and proposition can be guaranteed the inspection method of printed substrate quality comprehensive control, wherein this printed substrate is by the particularly processing of following printing machine, and promptly this printing machine is designed to handle the matrix at banknote, classified document or the like production period.
In addition, the objective of the invention is to propose a kind of method that is designed to be convenient to the printing machine operation as expert system enforcement.In this respect, be desirable to provide a kind of method that can in such expert system, implement especially, if wherein this expert system is used to predict that misprint generation and/or misprint provide a kind of misprint contingent explanation when taking place.
These purposes obtain by method and the expert system that limits in claims.Claimed in addition a kind of printing machine that expert system is housed.
Therefore, a kind of method that misprint takes place on printed substrate that is used to survey during printing machine is handled is provided, comprise that step is: during printed substrate is handled, a plurality of sensors are set with monitoring printing machine performance on the printing machine functional part, and the printing machine performance carried out linear analysis, to determine the generation of printer characteristics performance, wherein this characteristic performance causes or may cause on printed substrate misprint to take place, and perhaps causes or may cause the printed substrate letter-quality.
In the present invention, expert system mainly comprises and is connected to a plurality of sensors that are used to monitor printing machine performance during printed substrate is handled on the printing machine functional part, and comprise also and be connected to the treatment system that is used to carry out the linear analysis of printing machine performance on the described sensor that described treatment system is used to implement said method.
Useful is, said method comprises the linear analysis of printing machine performance is combined with the linear optics inspection of printed substrate.The linear optics inspection comprises that (i) optically obtains the image of printed substrate processed on printing machine, and (ii) the printed substrate image that obtains is handled, so that be identified in contingent misprint on the printed substrate.
According to an embodiment, the linear analysis of printing machine performance combines with the inspection of the linear optics of printed substrate, issue the possibility that misprint takes place thus after determining printing machine fault or anomalous performance early, the image of still determining simultaneously to obtain is with the elimination misprint.In other words, monitoring printing machine performance is optically checked printed substrate simultaneously, to verify its printing quality, if detect fault or unusual printing machine performance simultaneously, then provides misprint following contingent early stage indication.Because this embodiment, the contingent early prediction of misprint can make press operator that printing machine is suitably revised, to stop misprint to take place or to be limited in the actual generation of misprint of printing machine and the time quantum between the correction as much as possible.
According to another embodiment, the linear analysis of printing machine performance combines with the inspection of printed substrate linear optics, thereby the indication of misprint generation possible cause is provided.In other words, if detect misprint by optical checking system, then can according to during printed substrate is handled to the analysis of printing machine performance, provide one or more explanations of misprint possible cause.
Preferably, the operating parameter that comes sensing printing machine functional part by the sensor that utilizes suitable location carries out the printing machine performance evaluation to the printer characteristics performance modeling, and wherein operating parameter utilizes as the characteristic parameter of described characteristic performance.These characteristic performances comprise:
-cause or may cause the fault or the anomalous performance of the printing machine that misprint takes place; And/or
-cause or may cause the qualification performance (perhaps normal performance) of the printing machine of letter-quality.
In addition, but printer characteristics performance modelling, and so that reduce false error mistake or the false error of intending, promptly the mistake by being detected mistakenly at optical checking system mentioned above makes so-called Alpha and beta mistake optimization simultaneously.Alpha's mistake can be understood as the probability of finding bad paper in the good paper of a pile, and the beta mistake can be understood as the probability of having found paper in bad paper of a pile.According to invention, reduce described Alpha and beta mistake effectively by utilizing a plurality of sensor configurations (sensor-based system that promptly has a plurality of measurement passages).
In this case, by during printed substrate is handled at the operating parameter of printing in-flight monitoring printing machine functional part, perhaps whether indicate in the printing machine modelling characteristic performance one of anyly, determine whether the printing machine functional part operating parameter of sensing indicates printing machine fault or anomalous performance by the operating parameter of determining monitoring.
Preferably, printing machine fault or anomalous performance modelling comprise:
A plurality of classification misprints that-definition can take place on described printing machine;
-for each classification misprint, determine such operating parameter of printing machine, wherein this operating parameter shows printing machine fault or the anomalous performance that causes or may cause misprint to take place; And
-for each classification misprint, according to the operating parameter that is confirmed as representing described fault or anomalous performance, the corresponding model of definition printing machine fault or anomalous performance.
In the back in the situation, by the operating parameter of determining monitoring whether show with printing machine fault or anomalous performance definition model in one of any corresponding relation is arranged, determine whether the printing machine functional part operating parameter of sensing indicates printing machine fault or anomalous performance.
Preferably, adopt the fuzzy pattern sorting technique to carry out the machine performance analysis.In other words, organize fuzzy logic ordination is used for representing the printing machine performance and makes appearing at various classification misprint modellings on the printing machine more.In case defined these fuzzy logic ordinations, then these can be used for monitoring the printing machine performance, and discern and cause or may cause the possible corresponding relation of any printing machine performance of misprint generation.
The useful embodiment of invention is the theme of dependent claims.
Description of drawings
Read following detailed description to inventive embodiments, other features and advantages of the present invention will be more apparent, and wherein inventive embodiment only presents by means of limiting examples and illustrates by accompanying drawing, in the accompanying drawings:
Fig. 1 is the side view from the intaglio press of driving side observation;
Fig. 2 is the enlarged side view of intaglio press printing element among Fig. 1;
Fig. 3 is the schematic diagram that is used to implement the fuzzy pattern categorizing system structure of printing machine performance linear analysis;
Fig. 4 is the photo of printing sheets example, and wherein by camera, and this paper is considered to satisfy optical quality standard (being good sheet) to this photo during handling on Fig. 1 intaglio press;
Fig. 4 A is the photo of printing sheets second example, and wherein by camera, and this paper has this photo because the misprint that insufficient wiping pressure causes during handling on Fig. 1 intaglio press;
Fig. 4 B is the photo of printing sheets the 3rd example, and wherein by camera, and this paper has this photo because the surperficial misprint that causes of wet wiping cylinder during handling on Fig. 1 intaglio press;
Fig. 4 C is the photo of printing sheets the 4th example, and wherein by camera, and this paper has this photo because the surperficial misprint that causes of filthy wiping cylinder during handling on Fig. 1 intaglio press;
Fig. 5 A and 5B are two photos of each side of the wiping of intaglio press shown in Fig. 1 and 2 unit, wherein show the wiping cylinder bearing and the sensor configuration that are used to survey the noise/vibration that produces by printing machine, and this sensor deployment arrangements is on each bearing of wiping cylinder;
Fig. 6 is the example illustration by the so-called cepstrum (cepstrum) of the processing signals acquisition of measuring on bearing of wiping cylinder; And
Fig. 7 for generally showing among Fig. 6 cepstrum and how further handling in case extract with cepstrum selective value amplitude along with the time changes corresponding processing signals, wherein should select numerical value promptly to be worth at " each paper cepstrum " shown in Fig. 6 value and " revolution cepstrum ".
The specific embodiment
Below invention will be described in the intaglio press specific embodiment context of supply paper.Be clear that very the invention that limits as claim similarly is applicable to other kind printing machine, especially offset presses.Be clear that very that also although the printing machine of Miao Shuing is suitable for handling the matrix of continuous form form hereinafter, yet invention is applicable to that also matrix wherein to be printed forms the printing machine of the supply side reel paper of continuous roll web.
Fig. 1 shows the supply paper press of intaglio press 1 form, wherein, comprise the feeder 2 that is used to present printing sheets, the paper delivery unit 4 that is used for print the printing element 3 of (being intaglio printing) paper here and is used to collect new seal paper as in the art usually the form.Printing element 3 is applicable to intaglio printing, and generally comprise impression cylinder 7, carrying gravure printing plate plate cylinder 8 (in this example, plate cylinder 8 for three sections cylinders of carrying three gravure printing plate 8a, 8b, 8c-Fig. 2), be used for gravure printing plate 8a, 8b, 8c surface by plate cylinder 8 carryings are coated with the inking system 9 of China ink and are used for before paper printing gravure printing plate 8a, 8b, 8c by plate cylinder 8 carryings being coated with the wiping unit 10 that wiping is carried out on black surface.The similar example of intaglio press is for example disclosed in EP 0 091 709, EP 0 406 157 or EP 0 873 866.
Paper is sent on the paper feeding platform from paper feed unit 2, delivers to then on the impression cylinder 7.Paper is transported to printing by impression cylinder 7 then and cuts off on the folder position, and wherein this folder position forms by the contact position that wherein carries out intaglio printing between impression cylinder 7 and plate cylinder 8.In case printing, paper is sent to paper transportation system 11 from impression cylinder 7, delivers unit 4 to flow to.Paper transportation system 11 generally includes annular induction system, and wherein should the annular induction system have a pair of loop chain that is used to drive a plurality of folder rods that separate, above-mentioned folder rod is used to keep the leading edge (newly printing side towards being sent to the paper of delivering 4 paths, unit) of paper, and paper is sent on the folder rod of a correspondence from impression cylinder 7 continuously.
During being transported to paper delivery unit 4, preferably, check new seal paper by optical checking system 5.In the example that illustrates, useful is that optical checking system 5 is arranged on the path of paper transportation system 11, and then is positioned at after the printing element 3.Such optical checking system 5 is well known in the art, and does not therefore need to describe in detail.For example, be suitable in No. 97/37329, WO and No. 03/070465 international application of WO, being described as the example of the optical checking system of optical checking system 5 in Fig. 1 intaglio press.In EP 0 527 453, EP 0 543 281, WO 97/48556, WO 99/41082, WO 02/102595, EP 0 820 864, EP 0 820 865, EP 1 142 712, EP 1 167 034, EP 1 190 855, EP 1 231057 and EP 1 323 529 open files, also can find to be suitable for to carry out other examples of the optical checking system of printing sheets optical check.
Optical checking system 5 is suitable for carrying out the optical check of printing sheets, and surveys the appearance of misprint.As mentioning in front, for example basis is the 5th, 317 for optical check, and No. 390 and the 5th, 384, disclosed principle or any other suitable optical check principle are carried out in No. 859 United States Patent (USP)s (also referring to EP 0 527 285 and EP 0 540 833).
Send pass before, preferably, printing sheets is transferred in drying unit 6 fronts, wherein drying unit 6 is positioned at check system 5 back along paper transportation system 11 transport paths.Drying also can be carried out before the paper optical check.
According to the optical check result, excellent sheet, promptly see to be considered to acceptable those paper, flow to two paper and deliver in the heap one of them (a pile is transported, and another heap has carried out conveyance of sheets and is cleared owing to the front) from the print quality angle of checking.Bad paper is promptly seen from the print quality angle of checking and is thought that unacceptable those paper sheet delivery are to the 3rd paper delivery heap.
Fig. 2 is the schematic diagram of intaglio press 1 printing element 3 among Fig. 1.Such as already mentioned, printing element 3 mainly comprises impression cylinder 7, has the plate cylinder 8 of gravure printing plate 8a, 8b, 8c, inking system 9 and wiping unit 10.
Inking system 9 comprises four black printing devices in this example, and wherein three cooperate with public ink collection cylinder or Orlof cylinder 9.5 (here being two sections cylinders), and contacting of this public ink collection cylinder and plate cylinder 8 wherein.The 4th black printing device is placed to directly and contacts with the surface of plate cylinder 8.Be clear that very therefore the inking system 9 that illustrates is suitable for the indirect of plate cylinder 8 and directly black seal.In the present embodiment, each all comprises the ink tank 9.10,9.20,9.30 that cooperates with a pair of ink roller 9.11,9.21 and 9.31 respectively the black printing device that cooperates with ink collection cylinder 9.5.Every pair of ink roller 9.11,9.21,9.31 is gone up China ink to corresponding chablon cylinder (also as the China ink seal cylinder of selecting) 9.13,9.23,9.33 respectively successively, and wherein this chablon cylinder contacts with ink collection cylinder 9.5.As for the 4th black printing device, then comprise ink tank 9.40, other ink roller 9.44, a pair of ink roller 9.41 and chablon cylinder 9.43, latter's cylinder contacts with plate cylinder 8.Other ink roller 9.44 is necessary in situation after this, because the 4th black printing device 9.4 is used for directly to go up black with the surface of the plate cylinder 8 of ink collection cylinder 9.5 rightabouts rotation.As in the normal conditions of this area, chablon cylinder 9.13,9.23,9.33 becomes to have and gravure printing plate 8a, 8b, the corresponding elevated portion in 8c zone with 9.43 surface design, is used to admit the ink by the corresponding color of corresponding black printing device supply.
On the other hand, preferably, wiping unit 10 comprises wiping jar 10.1 (can and leave plate cylinder 8 and move towards plate cylinder 8), the wiping cylinder 10.2 that is arranged in the wiping jar and contacts with plate cylinder 8, at least the first scraper plate (perhaps dry scraper plate) 10.3 that contacts and be used for upward the wiping ink residue being removed with wiping cylinder 10.2 surfaces from wiping cylinder 10.2 surfaces, be used for polishing solution is coated in wiping cylinder 10.2 lip-deep cleaning devices 10.4 and contacts the dry scraper plate 10.5 that is used for removing from the surface of wiping cylinder 10.2 polishing solution remnants with wiping cylinder 10.2. surface.Cleaning device 10.4 usually comprises one group of injector and cleaning brush, is used for polishing solution is ejected into wiping cylinder 10.2 surfaces, and these wiping cylinder 10.2 surfaces are cleaned.
First scraper plate or dry scraper plate 10.3 are usually removed about 80% ink residue from wiping cylinder 10.2 surfaces, and cleaning device 10.4 goes down except that the ink residue remainder at injection polishing solution and cleaning brush effect simultaneously.On the other hand, dry scraper plate 10.5 has dry wiping cylinder 10.2 surfaces and removes polishing solution remnants from this surface, thereby stops this polishing solution residual contamination plate cylinder surface.
For example 4,236, No. 450 United States Patent (USP)s have also been described this type wiping unit that comprises injector as mentioned above and cleaning brush among EP 0 622 191 and the WO 03/093011.Also can design the wiping unit of other types, for example, as the immersion type wiping unit of describing in CH 415 694, US 3,468,248 and US 3,656,431, wherein this wiping cylinder is local to be immersed in the polishing solution.
Such as already mentioned, according to this area current state, the printing sheets printing quality is usually only by means of suitable optical checking system control, wherein this optical checking system is suitable for optically obtaining the printing sheets image, and determines based on these are obtained treatment of picture whether misprint occurs on printing sheets.As discussing in front, there is variety of issue inherently in the optical check of printing end product, and the early prediction of misprint appearance especially can not be provided, and can not explain the possible cause of these misprints.
According to the present invention, the optical check inherent defect overcomes by during handling at printing sheets the printing machine performance being carried out linear analysis.For this reason, printing machine to be monitored is equipped with a plurality of sensors, and these sensors are arranged on the functional part of printing machine.Because these sensors are used for monitoring printing machine performance during printed substrate is handled, so sensor must suitably be selected and be arranged on the appropriate functional part of printing machine.Sensor with and on printing machine the actual selection of position will depend on the press structure of wishing its performance of monitoring.For example, these are not identical for intaglio press and offset press, because these machine performances are different.
Not strictly must on each functional part of printing machine, sensor be set all.On the contrary, this sensor must be selected with so positioned, and promptly the operating parameter of the functional part that printing machine is selected is surveyed, and the various performances of printing machine are carried out enough accurately and typical description.Preferably, sensor should select and be positioned to survey and monitor incoherent each other operating parameter as much as possible.In fact, the rare more association of operating parameter, printing machine performance accuracy will be accurate more.For example, monitoring will be no longer very useful by the corresponding rotary speed of two cylinders that a common driver drives, because two parameters are contacted directly each other.On the contrary, the electric current of the motor of monitoring flow through being used as the printing machine drive unit and the contact pressure between two cylinders of printing machine will have better description to the printing machine performance.
In addition, the selection of sensor and layout should be according to the actual performance pattern of hope monitoring and the misprint classifications of wishing detection.Usually, be understandable that sensor can be arranged on any combination of surveying following operating parameter on the printing machine:
-printing machine processing speed, promptly printing machine is handled the speed of printed substrate;
The rotary speed of-cylinders of printing press or roller;
The electric current that-press printing unit motor driving drum is flowed through;
The temperature of-cylinders of printing press or roller;
-pressure between two cylinders of printing machine or roller;
-restraint condition on cylinders of printing press or roller bearing;
-the consumption of ink or fluid on printing machine; And/or
-on printing machine, handle the position of matrix or have (latter's information is particularly useful in the printer field that comprises some printed panels and/or printing felt, because printing performance changes to the next one from galley or printing felt).
According to the concrete structure of printing machine, also come in handy to monitoring other operating parameters.For example, under the intaglio press situation, monitoring to wiping unit critical piece proves particularly useful, thereby obtains printing machine performance typical module, because many printing issues cause owing to there are fault or anomalous performance in the wiping unit in intaglio press.
In the intaglio press 1 of Fig. 1, following operating parameter will be considered to general rule thus:
-
The processing speed of intaglio press 1-know that very intaglio press performance (being suitable for the other types printing machine equally) will depend on the speed of its handling of paper (perhaps roll web);
-
The electric current of flowing through as the motor of printing element 3 drive units of intaglio press 1-depending on the printing machine performance equally, the electric current that the motor of driving printing element 3 cylinders is flowed through will change with feature mode;
-
The cylinder of impression cylinder 7, plate cylinder 8 and/or inking system 9 or roller or wiping unit 10 Rotary speed(for example ink roller 9.11,9.12,9.21,9.22,9.31,9.32,9.41,9.42, chablon cylinder 9.13,9.23,9.33,9.43, collecting cylinder 9.5 and/or wiping cylinder 10.2)-rotary speed may be crucial unlike other operating parameters of printing machine, yet may still constitute the useful descriptor of printing machine performance;
-
The cylinder of impression cylinder 7, plate cylinder 8 and/or inking system 9 or roller or wiping unit 10 Temperature(for example ink roller 9.11,9.12,9.21,9.22,9.31,9.32,9.41,9.42, chablon cylinder 9.13,9.23,9.33,9.43, collection cylinder 9.5 and/or wiping cylinder 10.2)-temperature also is to describe the useful operating parameter of machine performance; Especially true under the following situation of intaglio press, promptly wherein plate cylinder 8 is typical thermal conditioning type, so that the temperature maintenance that guarantees it is in constant level (being typically at 80 ℃ of orders of magnitude) substantially; For example dry ink does not pass dirty problem to the too low meeting appearance of plate cylinder 8 temperature because of ink has curing can cause not;
-
Squeegee pressure between plate cylinder 8 and impression cylinder 7-squeegee pressure has characteristic in intaglio printing, contact pressure usually reaches the line pressure of about 10 000N/cm;
-
Wiping pressure between plate cylinder 8 and wiping unit 10-on intaglio press wiping pressure insufficient wiping pressure or to change may be the reason of various misprints; Wiping pressure constitutes useful especially parameter in the intaglio press field thus;
-
Contact pressure between plate cylinder 8 and inking system 9(for example at the contact pressure between ink collection cylinder 9.5 and the plate cylinder 8 or at the direct contact pressure between chablon cylinder 9.43 and the plate cylinder 8)-the same with wiping pressure, the insufficient contact pressure in intaglio press between plate cylinder and the inking system (perhaps it changes) with squeegee pressure may be black seal problem and so the root of misprint;
-
The operating parameter of wiping unit 10-except above-mentioned wiping pressure, other operating parameters of wiping unit (as enumerating hereinafter) seem useful for simulate press machine performance, as long as it is unusual especially to relate to wiping function; And/or
-
The operating parameter of inking system 9-same, except the contact pressure between inking system 9 and plate cylinder 8, with at the relevant operating parameter of inking system 9 ink inside supplies (for example in the ink tank China and Mexico water yield, be sent to the quantity of ink on the various ink rollers, for example the ink physicochemical property of temperature, viscosity or the like) may be the misprint root.
More particularly, be that following operating parameter will be considered to the characteristic parameter of printing machine performance owing to having in fault or the unusual machine performance that dysfunction causes in intaglio press wiping unit operations:
-wiping pressure between wiping cylinder 10.2 and plate cylinder 8;
-polishing solution stream in wiping unit 10;
The physicochemical property of-polishing solution (for example polishing solution temperature, polishing solution chemical composition or the like);
-between dry scraper plate 10.3 and the wiping cylinder 10.2 or the scraper plate pressure between dry scraper plate 10.5 and wiping cylinder 10.2;
-dry scraper plate 10.3 or dry scraper plate 10.5 are with respect to the Board position of scraping of wiping cylinder 10.2; And/or
-restraint condition on wiping cylinder 10.2 bearings.
Above operating parameter is enumerated and should be thought that certainly non exhaustive property enumerates.
The inventor has been found that, the combination suitable according to the aforesaid operations parameter, can simulate press machine performance and discern the printing machine monitoring performance whether towards there being the unusual direction of faulty behavior to develop, wherein this have the faulty behavior abnormality to cause or may cause that misprint occurs.Therefore, by linear analysis to printing machine performance during matrix printing and/or the processing, might be to will or determining to the appearance that fault or anomalous performance are arranged of printed substrate printing quality.
Preferably, the printing machine performance linear analysis that is proposed is meant carries out trend analysis to the printing machine performance.In other words, not the printing machine performance of seeing sometime, but analyze (promptly during the plurality of continuous printed substrate is handled) over a long time.The better part of this trend analysis is that it allows asymptotic deviation of printing machine performance or aging identification.
Preferably, the printing machine performance is linear analyzes based on fuzzy pattern sorting technique (fuzzy patternclassification techniques).In general, pattern classification (perhaps identification) relates to the known technology that measured value is described or classified.In pattern classification imagination behind is to judge feature shared in a group mode or characteristic (printing machine can present various performances) in this case, and according to the classification mode of determining they is divided into different predtermined category.Or rather, within the scope of the present invention, this imagination is to judge such classification mode, and promptly this pattern allows the possible performance of given printing machine to be divided into the different classes of performance corresponding with the misprint particular category (perhaps performance mode).
That classical modeling technique is attempted to avoid usually is ambiguous, inaccuracy or uncertain description rule.Fuzzy system is used this description rule wittingly.Be not to follow wherein pattern by " correctly " or " mistake " regular defined binary method, rule that on the contrary, that fuzzy system is used is relative " if-so ", promptly " if parameter Alpha equal/greater than/less than numerical value beta (beta), then incident A
All the time/often/sometimes/ NeverTake place ".In above-mentioned typical rule, descriptor " all the time ", " often ", " sometimes ", " never " usually are as " language modifier ", and are used for simulating the desired pattern of asymptotic factual aspect.This cause easier control and for people's thinking more familiar simpler, the model that is more suitable for.
The inventor has realized that fuzzy system is particularly suitable for the modeled problem to the performance mode of the intrinsic unlimited variation of printing machine itself.Specifically, Mo Hu pattern classification is to describe the printing machine performance and it is divided into the effective means of limited classification.Fuzzy pattern classification usually is distinguished into each kind or pattern class to the input space (in example at present for by being arranged on variable or the operating parameter that a plurality of sensors are surveyed on the printing machine functional part), and given pattern is assigned in those kinds one.If pattern directly is not fit to given kind, then report so-called " grade of fit ".By using fuzzy set, then might description scheme belong to the degree of a classification or another classification as pattern class.By each kind is regarded as ambiguity group, and one group of fuzzy " if-so " rule is designated assignment operators, then between ambiguity group and pattern classification, set up direct relation.
Fig. 3 is the schematic diagram of the fuzzy classification system structure that is used to implement the printing machine performance evaluation according to the present invention.The operating parameter P1 that disposes sensings by a plurality of sensors is to Pn optionally preliminary treatment of quilt before being transported to pattern classifier.Specifically, this preliminary treatment comprises by the spectral conversion of some signals of sensor output (as explaining hereinafter), and signal wherein particularly expects to find to represent the signal of the feature mode of printing machine performance.This spectral conversion is designed for handling vibration or the signal of noise, for example the intaglio press characteristic noise/vibration mode that expression is produced by printing machine especially.
As already mentioned, fuzzy pattern classifier realizes mainly as fuzzy " if-so " rule group of imitation people thinking, and wherein this rule is designed to seek in printing machine performance that the operating parameter P1 by input (and selectively preliminary treatment) represents to Pn and in some deterministic model classifications each and all distributes contact the corresponding classification of misprint.When carrying the policer operation parameter P1 that provides by a plurality of sensors configurations to Pn, classifying becomes anticipation cover half formula classification and related with the misprint classification.According to the corresponding relation the fuzzy rule group of monitoring printing machine performance of representing to Pn by input operation parameter P1 and determinating mode classification, for each pattern class, preferably, corresponding " member " numerical value or the weight (being also referred to as " score value " or " fitness value ") of ownership.
Know various fuzzy models for those skilled in the art equally.Specifically, these comprise what is called " fuzzy pattern classification " model (FPC), " Takagi-Sugeno " model or the like.Usually, they can design under " language " fuzzy rule helps.In addition, output model can design by different way, for example, utilizes " center of gravity " method, based on " Singleton " method etc.Within the scope of the present invention, " language " fuzzy model technology and as if be suitable for most the purpose of printing machine performance classification based on the output function of " Singleton ".
Get back to the intaglio press example, the misprint that decidable appears on the printing machine is determined classification.For convenience of explanation, enumerate main misprint classification now, these class of operations may appear among Fig. 1 on the intaglio press 1, and may since the dysfunction in wiping unit 10 is operated produce:
Classification A: owing to misprint-wiping insufficient pressure not enough between wiping cylinder 10.2 and plate cylinder 8 or that insufficient wiping pressure causes, usually can cause in the lip-deep insufficient wiped area of plate cylinder, then be reflected on the printed substrate as even China ink seal zone;
Classification B: because the misprint that wiping cylinder 10.2 insufficient dryings (perhaps too wet) surface causes, promptly because dry scraper plate 10.5 inappropriate setting-wiping cylinder surfaces are too wet, usually can cause inkiness on the plate cylinder surface, this can go up the China ink seal zone in light or dense zone and be reflected on the printed substrate subsequently as being presented on intaglio printing product zones;
Classification C: because the misprint that filthy wiping cylinder 10.2 causes, be that ink residue is trapped on wiping cylinder 10.2 surfaces-filthy wiping cylinder, can be the result of different factors, these factors for example comprise the insufficient supply of polishing solution or flow (for example problem of injector), invalid (for example Shua the excessive wear) of cleaning brush, insufficient pressure between the dry scraper plate of dry scraper plate and wiping cylinder or damage, the polishing solution temperature is insufficient, insufficient physics of polishing solution or chemical property or the like-filthy wiping cylinder usually causes the appearance of random distribution China ink watermark patterns on printed substrate;
Classification D: because the wiping cylinder of misprint-damage that the wiping cylinder 10.2 that damages causes, usually can make on wiping unit wiping efficient at each swing circle of this wiping cylinder localized variation takes place, this is subsequently to be reflected on the printed substrate like mode with the classification category-A;
Classification E: because the dry scraper plate of misprint-damage that the dry scraper plate 10.5 that damages causes usually can cause the variation on wiping cylinder dry tack free/wet condition, this is subsequently to be reflected on the printed substrate like mode with the classification category-B;
Classification F: since the variations in temperature of wiping cylinder 10.2 cause misprint-as classification A and D, the variation on the wiping cylinder temperature causes the wiping cylinder change in size, thereby change wiping efficient, also will be reflected on the printed substrate subsequently.
Fig. 4 is the illustrative local pictures of the printing sheets handled on intaglio press as shown in Figure 1.Or rather, figure A shows the photo of the printing sheets that obtains under normal operating condition.
Fig. 4 A is the illustrative local pictures of the printing sheets handled on intaglio press, wherein show because the insufficient characteristic misprint that causes of wiping pressure as mentioning under the classification A hereinbefore.As shown in Fig. 4 A top like that, misprint is with in the evenly China ink seal zone appearance of intaglio printing product.The inventor recognizes, is not moment in the actual generation of misprint shown in Fig. 4 A, and after date occurs when a certain and these misprints reduce at wiping pressure.Usually drive the electric current that the motor of printing element is flowed through by monitoring, just may survey wiping pressure and reduce, this minimizing of wiping pressure is reflected as the reduction on current drain.With after the restraint condition of surveying on the wiping cylinder bearing (for example vibration) monitoring contact, just may judge the characteristic model that is printed with faulty behavior, and the prediction misprint takes place.Variation as the wiping pressure mentioned in classification D and F can be surveyed in a similar manner.
Fig. 4 B is the illustrative local pictures of the printing sheets handled on intaglio press, wherein show because as the characteristic misprint that causes of the polishing solution pollution of mentioning under the classification B hereinbefore.As shown in Fig. 4 B bottom like that, misprint is with in the light or dense zone appearance of intaglio printing product.The inventor recognizes, neither moment in the actual generation of misprint shown in Fig. 4 B, because only little by little accumulate on the gravure printing plate usually owing to the insufficient drying of wiping cylinder causes polishing solution.In addition, drive the electric current that the motor of printing element is flowed through by monitoring, and scrape Board position and the scraper plate pressure between dry scraper plate and wiping cylinder by monitoring drying, just might survey the wiping cylinder surface insufficient drying regime (this monitoring can be selected by direct monitoring wiping cylinder surface or additionally carry out) takes place.Monitoring to the restraint condition surveyed on the wiping cylinder bearing also is useful for the expression printing machine performance relevant with insufficient drying.Therefore can judge equally to be printed with the faulty behavior characteristic model, and the prediction misprint takes place.Can survey in a similar manner as the dry scraper plate of the damage of in classification E, mentioning.
Fig. 4 C is the illustrative local pictures of the printing sheets handled on intaglio press, wherein show because as the characteristic misprint that causes of the filthy wiping cylinder surface of mentioning under the classification C hereinbefore, and this filthy surface is owing to the insufficient supply of polishing solution causes.As among Fig. 4 C shown in the left-hand side of portrait zone like that, misprint occurs with randomly shaped China ink seal zone.The same with other misprints, the inventor recognizes in the actual generation of misprint shown in Fig. 4 C neither moment.By the electric current that the motor of monitoring driving printing element is flowed through, for example, when electric consumption will have ascendant trend, just can survey the polishing solution of low amount.This measurement can replenish the measurement with polishing solution stream.Therefore also can judge the characteristic model that is printed with faulty behavior, and the prediction misprint takes place.The misprint other reasons of mentioning under classification C can be monitored in a similar manner.
Certainly only mention in the misprint classification of above enumerating for illustration purpose.Although above-mentioned enumerating can be considered to represent the major error that occurs owing to wiping problem result, however it should be understood that this enumerate should not think exhaustive.
It should also be understood that, misprint not only occurs as the result of the problem relevant with the wiping unit operations, and should mistake also can be the parafunctional result of other functional parts of printing machine, for example insufficient squeegee pressure between plate cylinder 8 and impression cylinder 7, the insufficient China ink seal by 9 pairs of plate cylinders 8 of inking system or the like.
As what mentioned hereinbefore be, the analysis depends of printing machine performance is provided with enough configurations of a plurality of sensors, and this configuration is suitable for providing the measurement of the printing machine functional part operating parameter that is enough to describe the printing machine performance.The useful especially mode of a measurement printing machine performance is noise or vibration that monitoring is produced by printing machine.This noise or vibration can be measured on any appropriate location of printing machine in theory.Particularly suitable position is measurement noise or vibration on the cylinders of printing press bearing.In the intaglio press shown in Fig. 1 and 2, a suitable position is the back shaft of wiping cylinder 10.2.
Fig. 5 A and 5B are that detecting printing press produces two photos that possible the sensor of noise or vibration disposes on 10.2 of wiping cylinders.Fig. 5 A shows first roller bearings 101 of wiping cylinder 10.2, wherein this first roller bearings is positioned on the wiping jar 10.1 of intaglio press left-hand side (perhaps driving side), and Fig. 5 B shows the second relative roller bearings 102 (for the sake of clarity, Fig. 1 shows the intaglio press of observing from driving side) of wiping cylinder 10.2.Wiping cylinder 10.2 illustrates at Fig. 5 A and 5B, yet can be supported between two bearings 101 shown in the photo and 102.The part shows plate cylinder 8 in Fig. 5 A and 5B.
On each roller bearings 101,102, pair of sensors 51a, 51b and 52a, 52b preferably are set, be used for sensing along perpendicular to two different directions noise transmitted of wiping cylinder 10.2 rotating shafts or vibration, in this case by means of the horizontal sensing of sensor 51a, 52a, and by means of sensor 51b, 52b vertical sensing measurement.Sensor 51a, 51b, 52a, 52b can be any proper sensors to noise or vibration sensing, for example sonic transducer, acceleration transducer or any other pressure-sensitive or dependent sensor that shakes.
Utilize the sensor configuration shown in Fig. 5 A and the 5B, therefore will be appreciated that, the four measuring passage is set, with monitoring printing machine performance from the noise or the vibration viewpoint that are delivered to wiping cylinder 10.2.As already mentioned, these are measured passages and will measure passage by other and replenish.For example, have been found that by following additional channel and come rightly to replenish above-mentioned four measuring passage:
-be used for the passage that the printing machine processing speed measures (for example per hour the number of handling of paper);
-be used to drive the passage that the current of electric of cylinders of printing press consumes;
-being used for two passages that squeegee pressure is measured between impression cylinder 7 and plate cylinder 8, pressure is measured in the cylinder both sides;
-be used for the tonometric passage of scraper plate between dry scraper plate 10.5 and wiping cylinder 10.2 (this pressure usually by hydraulic means regulate);
-be used for a passage of polishing solution flow measurement;
-being used for two passages of dry scraper plate 10.5 position measurements, this position is at the scraper plate two-sided measurement;
-be used in reference to and be shown in the printing position paper and exist or a non-existent passage; And
-be used to indicate which galley to be used for a passage of printing sheets.
The above-mentioned example that is used for a plurality of sensor configurations of sensing printing machine performance provides similar 14 different passages, has been found that these passages are enough to describe rightly and monitor the intaglio press performance, at least till the operation that relates to wiping unit 10.
What above mentioned be some signals of the desirable sensor output that is preliminary treatment by being used to monitor the printing machine performance.Together with to the noise that produced by printing machine and/or the sensing of vibration, particularly like this, wherein this signal usually presents a large amount of frequency components.The classical way that sort signal is handled is the spectral conversion of carrying out signal.Common spectral conversion is the famous Fourier transformation (and derivative) that signal is converted to frequency domain by time domain.Because periodic signal component is identified as peak value in this frequency spectrum easily in frequency domain, by operating in thus obtained frequency spectrum, signal is handled and is become simpler.Yet the defective of Fourier transformation is that it can not discern and be isolated in phase motion in the signal, phase shift, drift, echo, noise or the like effectively.
" frequency spectrum " analysis more fully is that so-called " cepstrum " analyzed." cepstrum " is the displacement word of " frequency spectrum ", and is the term of admitting that is used for signal spectrum logarithm inverse Fourier transform.Cepstrum analysis especially is used for replacing analysis frequency analysis " sound ".Cepstrum can be regarded the information about rate of change in the different spectral scope as.(referring to title is " The Quefrency Analysis of Time Series for Echoes:Cepstrum; Pseudautocovariance; Cross-Cepstrum; and Saphe Cracking (be used for the quefrency time series analysis of echo: logarithmic spectrum, Pseudautocovariance, intersection logarithmic spectrum and saphe crack) " initial to propose expression because the earthquake echo that earthquake and bomb blast produce, Bogert, Healy and Tukey, 1963).People such as Bogert notice that the signal power spectrum logarithm that contains echo has the additional cycle component, so power spectrum logarithm Fourier transformation should present peak value at echo delay owing to echo.They call " cepstrum " to this function, exchange with letter in word " frequency spectrum ", because " usually, we realize own to operate in frequency side at the customary way of time side, and vice versa ".The cepstrum that signal is transformed into it is isomorphic transformation, and the cepstrum principle is to be used to handle the essential part of homomorphic system theory of the signal by the convolution combination (referring to " Discrete-Time Signal Processing (discrete-time signal processing) ", A.V.Oppenheim and R.W.Schafer, Prentice Hall, Englewood Cliffs, NJ, 1989).
The advantage of cepstrum analysis has many:
-one of them maximum feature is that any periodicity or repeat pattern will come sensing as one or two certain components in cepstrum in frequency spectrum;
If-frequency spectrum contains some groups of sidebands or harmonic series, then they are because wave band is overlapping and chaotic.Yet in cepstrum, they are separated to separate the similar mode of repeat pattern mode with frequency spectrum in time signal.
-cepstrum analysis is particularly suitable for the analysis of spinner member bear vibration.
Therefore, as the preferred embodiment of invention, the signal of measuring at the printing machine spinner member (for example in the generation of wiping cylinder bearing and by the noise and/or the vibration of sound/vibration sensor sensing as mentioned above) utilizes above cepstrum analysis pretreated.
Refer again to the measurement of in Fig. 1 and 2, carrying out on intaglio press wiping cylinder 10.2 bearings, preferably, carry out cepstrum analysis to extract three variablees, wherein these three variablees can be called as " each paper cepstrum ", " cepstrum 2:3 " and " revolution cepstrum " numerical value, carry out trend analysis according to these two variablees simultaneously.In the scope of the invention, judge " each paper cepstrum " numerical value, as with paper i.e. corresponding cepstrum numerical value of the time interval between two continuous forms at interval.Within the scope of the present invention, " cepstrum 2:3 " numerical definiteness is the cepstrum numerical value with plate cylinder 8 and Orlof cylinder 9.5 (in this example, cylinder is respectively three sections and two sections cylinders) arrangement pitch correspondence.On the other hand, within the scope of the present invention, " revolution cepstrum " numerical definiteness is for carrying out a necessary time interval of complete rotation (perhaps rotating at interval) corresponding cepstrum numerical value (time interval is a plurality of paper intervals) with printing press plate cylinder.In the gravure printing plate that comprises three sections plate cylinders and two sections Orlof cylinders shown in Fig. 1 and 2, paper interval, arrangement pitch and rotation interval (in second) are given by the following formula:
[the second]=3600/ paper _ processing _ speed of paper _ at interval [number/hour],
Arrange _ [second] the * #_ section _ Orlof_ cylinder of [second]=paper _ at interval at interval
Rotate _ [second] the * #_ section _ plate _ cylinder of [second] paper _ at interval at interval
Fig. 6 schematically shows the typical cepstrum of the noise signal of measuring on a bearing of wiping cylinder 10.2, in this example, intaglio press paper process speed is set in per hour 6316, this provides 0.57 second paper interval, 1.14 seconds arrangement pitches and had rotated in 1.71 seconds at interval, and corresponding " each paper cepstrum ", " cepstrum 2:3 " and " revolution cepstrum " numerical value are as three peak values appearance in Fig. 6 cepstrum.
Preferably, utilization is used for the velocity standard moving belt bandpass filter of the relevant band division filter of cepstrum is monitored, the development (or trend) of each " each paper cepstrum " and " revolution cepstrum ", this bandpass filter " locking " respectively (are inversely proportional to paper process speed) at interval at interval at relevant paper interval or rotation.The trap signal maximum that generates is detected, and the amplitude along with the time variation of record generation.Fig. 7 schematically shows above processing and filtering principle.As among Fig. 7 shown in the upper left, utilize suitable velocity standard bandpass filter (being that centre-lock is on the bandpass filter in the relevant time interval), on every side, cepstrum is filtered for the first time in the relevant time interval (being paper interval or rotation interval).On right part on Fig. 7, show the last generation filtered bands of cepstrum.The maximum of this filtered bands is detected, and wherein amplitude is also along with the time is recorded simultaneously, and the result is in signal shown in Fig. 7 bottom.This signal is then with the basis that acts on monitoring printing machine performance trend.
Refer again in the above acoustics and/or the vibration measurement mentioned at Fig. 5 A and 5B, wherein four different measurement passages (i.e. level and the vertical survey of carrying out in the wiping cylinder both sides) are represented in this measurement, for each all carries out cepstrum analysis as mentioned above in the four measuring passage, eight trend signals of Sheng Chenging are as the basis of monitoring printing machine performance at last.
According to the preferred embodiment of invention, the linear analysis of printing machine performance combines with the printed substrate checking linearity.In other words, the conclusion that draws in the classification of printing machine performance mode is associated with the conclusion that the printed substrate optical check draws.
In some cases, the operating parameter of sensing can represent that also printing machine has fault or anomalous performance, does not have fault or anomalous performance will cause the conclusion of misprint thereby do not rely on the printed substrate optical check just might draw immediately and survey.Yet, in other cases, about the contingent definite conclusion of misprint may not can directly and uniquely draws from printing machine performance mode classification results.In this case, performance evaluation can be offered help with combining of printed substrate optical check.
From general viewpoint, between printing machine performance evaluation and printed substrate inspection, can carry out combination, so that:
-after definite printing machine had fault or anomalous performance, the contingent early prediction of issue misprint was still determined the image by the check system acquisition, simultaneously to eliminate misprint; And/or
-indication of the misprint generation possible cause of surveying by the printed substrate optical check is provided.
Fuzzy logic technology uses together with the combination of printed substrate check result and printing machine results of performance analysis once more.The view data that generates the optics demonstration by sensing data and misprint to expression printer characteristics fault/anomalous performance compares, and can determine the pattern classifier (similar with the mode of having explained in the pattern classification that above combines the printing machine performance) of the higher level of fuzzy set and design.
Will be appreciated that is not having to break away under the invention scope situation that is limited by the accessory claim book, and various variations and/or the improvement carried out at above-described embodiment are conspicuous for the those skilled in the art.
For example, although, also can imagine the spectrum analysis of the frequency spectrum conversion that utilizes other types above cepstrum analysis being described as being particularly suitable for and noise or the relevant measuring-signal of vibration.In that, should consider any suitable derivation situation of Fourier transformation.This for example comprises so-called wavelet transform and circular conversion.
In addition, although discussed fuzzy logic technology, yet comprise that the additive method of the modeling technique that utilizes so-called neutral net also can imagine together with modeling and pattern classification problem.A difference between these two kinds of methods is, the fuzzy pattern grader can be created by learning process with based on the skilled designer (so-called " technical staff ") of test data that relates to process and knowledge, and neutral net is only based on learning process.The technical staff can be under " language modifier " helps Adjustment System.
Claims (26)
1. one kind is used to survey the method that misprint takes place on printed substrate during printing machine is handled, comprise that step is: during printed substrate is handled, a plurality of sensors are set with monitoring printing machine performance on the printing machine functional part, and the printing machine performance carried out linear analysis, to determine the generation of printer characteristics performance, wherein this characteristic performance causes or may cause taking place misprint on printed substrate, perhaps cause or may cause the printed substrate letter-quality.
2. according to the process of claim 1 wherein the trend analysis of carrying out the printing machine performance during printed substrate that the linear analysis of described printing machine performance is included in plurality of continuous is handled.
3. according to the method for claim 1 or 2, the linear analysis of wherein said printing machine performance comprises the fuzzy pattern classification of carrying out the printing machine performance.
4. the method one of any according to the front claim also comprises the linear analysis of printing machine performance is combined with the linear optics inspection of printed substrate.
5. according to the method for claim 4, the described linear optics inspection of wherein said printed substrate comprises:
(i) image of the printed substrate that acquisition is handled on printing machine on the optics; And
(ii) handle the image of the printed substrate that obtains, so that be identified in contingent misprint on the described printed substrate,
And the linear analysis of wherein said printing machine performance combines with the inspection of printed substrate linear optics, issue the possibility that misprint occurs thus after determining printing machine fault or anomalous performance early, the image of still determining simultaneously to obtain is to eliminate misprint.
6. according to the method for claim 4, the described linear optics inspection of wherein said printed substrate comprises:
(i) image of the printed substrate that acquisition is handled on printing machine on the optics; And
(ii) handle the image of the printed substrate that obtains, so that be identified in contingent misprint on the described printed substrate,
And the linear analysis of wherein said printing machine performance combines with the inspection of printed substrate linear optics, and the indication of the possible cause of the misprint generation of surveying by the printed substrate optical check is provided thus.
7. the method one of any according to the front claim, wherein the step that comprises of the described linear analysis of printing machine performance is:
(a
1) at the operating parameter of the printing machine functional part during printed substrate is handled of sensing on the printing machine, this operating parameter is illustrated in printed substrate handle during the performance of printing machine; And
(a
2) determine printing machine fault or anomalous performance that whether the operating parameter of the printing machine functional part of sensing expresses possibility and cause misprint.
8. according to the method for claim 7, also comprise preliminary step (a
0), the operating parameter that promptly utilizes the printing machine functional part is to the printer characteristics performance modeling, and with the characteristic parameter as described characteristic performance, described characteristic performance comprises:
Cause or may cause the fault or the anomalous performance of the printing machine of misprint generation; And/or
Cause or may cause the normal performance of printing machine of printed substrate letter-quality,
Wherein said determining step (a
2) comprising:
(a
21) at the operating parameter that prints in-flight monitoring printing machine functional part during printed substrate is handled; And
(a
22) that whether the operating parameter of determining monitoring is expressed as in the printing machine modelling characteristic performance is one of any.
9. method according to Claim 8, wherein said preliminary step (a
0) comprise printing machine fault or anomalous performance modelling to causing or may cause misprint to take place, and may further comprise the steps:
(a
01) definition a plurality of classification misprints that can on described printing machine, take place;
(a
02) for each classification misprint, determine such operating parameter of printing machine, wherein this operating parameter shows printing machine fault or the anomalous performance that causes or may cause misprint to take place; And
(a
03) for each classification misprint, according to the operating parameter that is confirmed as representing described fault or anomalous performance, the corresponding model of definition printing machine fault or anomalous performance,
And wherein said determining step (a
22) comprise whether the operating parameter of determining monitoring shows the corresponding relation one of any with the printing machine fault of definition or anomalous performance definition model.
10. according to Claim 8 or 9 method, wherein the described modelling of printer characteristics performance comprises by means of the fuzzy logic ordination group and comes modelling to described characteristic performance.
11. the method one of any according to the front claim, wherein sensor is arranged on the printing machine, so that any combination of the following operating parameter of sensing:
The processing speed of-printing machine;
The rotary speed of-cylinders of printing press or roller;
The electric current that the motor of-driving cylinders of printing press is flowed through;
The temperature of-cylinders of printing press or roller;
-pressure between two cylinders of printing machine or roller;
-restraint condition on cylinders of printing press or roller bearing;
-the consumption of ink or fluid on printing machine; And/or
-the position or the existence of processing matrix on printing machine.
12. the method one of any according to the front claim, wherein sensor is arranged on the printing machine, so that the sensing operating parameter of incoherent as far as possible printing machine functional part each other.
13. the method one of any according to the front claim, go up enforcement at intaglio press (1), wherein this intaglio press comprises at least: impression cylinder (7), the plate cylinder (8) that contacts with impression cylinder (7), the wiping unit (10) that is used for the inking system (9) that plate cylinder (8) surface ink is printed and is used for wiping plate cylinder (8) China ink seal surface before printing.
14. according to the method for claim 13, wherein sensor is arranged on the intaglio press (1), so that any combination of the following operating parameter of sensing:
The processing speed of-intaglio press (1);
-the electric current of flowing through as the motor of intaglio press (1) drive unit;
-impression cylinder (7), plate cylinder (8) and/or inking system (9) or the cylinder of wiping unit (10) or the rotary speed of roller;
-impression cylinder (7), plate cylinder (8) and/or inking system (9) or the cylinder of wiping unit (10) or the temperature of roller;
-squeegee pressure between plate cylinder (8) and impression cylinder (7),
-wiping pressure between plate cylinder (8) and wiping unit (10);
-contact pressure between plate cylinder (8) and inking system (9);
The operating parameter of-wiping unit (10); And/or
The operating parameter of-inking system (9).
15. according to the method for claim 13 or 14, survey the misprint on the printed substrate, wherein this misprint is owing to dysfunction in wiping unit (10) operation causes.
16. method according to claim 15, wherein said wiping unit (10) comprises wiping jar (10.1), the wiping cylinder (10.2) that is arranged in wiping jar (10.1) and contacts with plate cylinder (8), contact with wiping cylinder (10.2) surface and to be used for from wiping cylinder (10.2) surface the dry scraper plate (10.3) of wiping ink residue removal, be used for polishing solution is coated in the lip-deep cleaning device of wiping cylinder (10.2) (10.4) and contacts the dry scraper plate (10.5) that is used for removing from the surface of wiping cylinder (10.2) polishing solution remnants with wiping cylinder (10.2) surface
And sensor wherein is set with sensing:
-wiping pressure between wiping cylinder (10.2) and plate cylinder (8);
-polishing solution stream in described wiping unit (10);
The physicochemical property of-polishing solution;
-between dry scraper plate (10.3) and the wiping cylinder (10.2) or the scraper plate pressure between dry scraper plate (10.5) and wiping cylinder (10.2);
-dry scraper plate (10.3) or dry scraper plate (10.5) are with respect to the Board position of scraping of wiping cylinder (10.2); And/or
-restraint condition on wiping cylinder (10.2) bearing.
17. according to the method for claim 16, wherein wiping pressure, scraper plate pressure, scrape Board position and/or the restraint condition on wiping cylinder (10.2) bearing is sensed at each end of wiping cylinder (10.2).
18. the method one of any according to the front claim, wherein monitor the printing machine performance be included in printed substrate handle during noise and/or the vibration of monitoring by described printing machine generation.
19. it is, wherein sensed on the cylinders of printing press bearing by the noise and/or the vibration of described printing machine generation according to the method for claim 18.
20. method according to claim 19, go up enforcement at intaglio press (1), wherein this intaglio press comprises at least: impression cylinder (7), the plate cylinder (8) that contacts with impression cylinder (7), be used for the inking system (9) to plate cylinder (8) surface ink seal, and have the wiping unit (10) that the wiping cylinder (10.2) that contacts with plate cylinder (8) is used for wiping plate cylinder (8) China ink seal surface before printing, wherein sensed on the bearing of described wiping cylinder (10.2) by noise and/or vibration that described intaglio press (1) produces.
21. method according to claim 19 or 20, wherein pass through noise or vibration quilt at least two sensors (51a, 51b, 52a, 52b) sensing that described printing machine produces, wherein these two sensors are positioned on the roller bearings (101,102), and for along perpendicular at least two different directions noise transmitted of cylinder rotating shaft or vibration sensing.
22. the method one of any according to claim 19 to 21, wherein noise that produces by described printing machine or vibration are by sonic transducer, acceleration transducer or voltage sensitive sensor sensing.
23. the method one of any according to the front claim also comprises the signal by sensor output carried out preliminary treatment.
24., wherein the described preliminary treatment by sensor output signal is comprised the so-called cepstrum analysis that carries out described signal according to the method for claim 23.
25. one kind is used for surveying the expert system that takes place in the printed substrate misprint on the printing machine during printed substrate is handled, described expert system comprises and is connected to a plurality of sensors that are used to monitor printing machine performance during printed substrate is handled on the printing machine functional part, and comprise also and be connected to the treatment system that is used to carry out the linear analysis of printing machine performance on the described sensor that described treatment system is used to implement the method one of any according to the front claim.
26. printing machine that expert system as claimed in claim 25 is installed.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP05111342.1 | 2005-11-25 | ||
| EP05111342A EP1790473A1 (en) | 2005-11-25 | 2005-11-25 | Method for detection of occurrence of printing errors on printed substrates during processing thereof on a printing press |
| EP06115689.9 | 2006-06-19 |
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| CN201110225457.9A Division CN102381019B (en) | 2005-11-25 | 2006-11-21 | Method for detection of occurrence of printing errors on printed substrates during processing thereof on a printing press |
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| CN101316709A true CN101316709A (en) | 2008-12-03 |
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| CNA2006800442250A Pending CN101316709A (en) | 2005-11-25 | 2006-11-21 | Method for detection of occurrence of printing errors on printed substrates during processing thereof on a printing press |
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| EP2045783A1 (en) * | 2007-10-02 | 2009-04-08 | Kba-Giori S.A. | Method and system for controlled production of security documents, especially banknotes |
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| DE4142481A1 (en) | 1991-08-12 | 1993-02-18 | Koenig & Bauer Ag | QUALITY CONTROL OF AN IMAGE, FOR example A PRINTED PATTERN |
| DE4126799A1 (en) | 1991-08-14 | 1993-02-18 | Koenig & Bauer Ag | DEVICE FOR CONTROLLING A PRINTED SHEET IN A SHEET ROTARY PRINTING MACHINE |
| DE4237837A1 (en) | 1991-11-21 | 1993-06-03 | Koenig & Bauer Ag | |
| EP0622191B1 (en) | 1993-04-30 | 1997-01-22 | De La Rue Giori S.A. | Wiping device of an intaglio printing machine |
| IT1276010B1 (en) | 1995-03-07 | 1997-10-24 | De La Rue Giori Sa | PROCEDURE FOR PRODUCING A REFERENCE MODEL INTENDED TO BE USED FOR THE AUTOMATIC QUALITY CONTROL OF |
| DE19613082C2 (en) | 1996-04-02 | 1999-10-21 | Koenig & Bauer Ag | Method and device for the qualitative assessment of processed material |
| DE19624196C2 (en) | 1996-06-18 | 1999-09-23 | Koenig & Bauer Ag | Device and method for sheet guidance in a qualitative assessment of processed sheets |
| JPH1034891A (en) | 1996-07-23 | 1998-02-10 | Komori Corp | Sheet-fed press |
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| CA2232695C (en) | 1997-04-14 | 2005-02-01 | De La Rue Giori S.A. | Intaglio printing press |
| EP1054771B1 (en) | 1998-02-13 | 2002-06-26 | Koenig & Bauer Aktiengesellschaft | Methods and devices for transporting a sheet |
| MC2479A1 (en) | 1998-09-07 | 1999-04-27 | Luigi Stringa | Automatic inspection of print quality by an elastic model |
| JP4421066B2 (en) | 2000-04-07 | 2010-02-24 | 株式会社小森コーポレーション | Double-sided printing machine quality inspection device |
| JP4950374B2 (en) | 2000-06-23 | 2012-06-13 | 株式会社小森コーポレーション | Sheet-like object identification method and identification apparatus |
| DE10132266B4 (en) * | 2000-07-11 | 2015-10-22 | Heidelberger Druckmaschinen Ag | Method for controlling the transfer pass in a sheet-fed rotary printing machine |
| JP4616451B2 (en) | 2000-09-22 | 2011-01-19 | 株式会社小森コーポレーション | Print quality inspection device |
| JP4676070B2 (en) | 2001-02-09 | 2011-04-27 | 株式会社小森コーポレーション | Sheet-fed printing press |
| DE10128833B4 (en) | 2001-06-15 | 2006-11-02 | Koenig & Bauer Ag | Quality control device |
| JP2003251789A (en) | 2001-12-27 | 2003-09-09 | Komori Corp | Printing quality inspection device of printing press |
| DE10207073B4 (en) | 2002-02-20 | 2005-11-24 | Koenig & Bauer Ag | Device for transporting sheets with a sheet guiding element |
| DE10208285A1 (en) | 2002-02-26 | 2003-09-18 | Koenig & Bauer Ag | Process for correcting the image data of a camera system |
| EP1361046A1 (en) | 2002-05-06 | 2003-11-12 | Kba-Giori S.A. | Nozzles for a cleaning installation of a printing machine |
| DE10234085B4 (en) | 2002-07-26 | 2012-10-18 | Koenig & Bauer Aktiengesellschaft | Method for analyzing color deviations of images with an image sensor |
| DE202004018072U1 (en) * | 2004-11-20 | 2005-01-20 | Man Roland Druckmaschinen Ag | Sheet printer has series of printers and transfer drums with a control and regulating device to control inclined register adjusting device for first printing and perfecting operations |
-
2005
- 2005-11-25 EP EP05111342A patent/EP1790473A1/en not_active Withdrawn
-
2006
- 2006-11-21 CN CNA2006800442250A patent/CN101316709A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| EP1790473A1 (en) | 2007-05-30 |
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