CN102991122A - Ink color control system and ink color control method - Google Patents
Ink color control system and ink color control method Download PDFInfo
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- CN102991122A CN102991122A CN2012104737249A CN201210473724A CN102991122A CN 102991122 A CN102991122 A CN 102991122A CN 2012104737249 A CN2012104737249 A CN 2012104737249A CN 201210473724 A CN201210473724 A CN 201210473724A CN 102991122 A CN102991122 A CN 102991122A
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Abstract
The invention discloses an ink color control system and an ink color control method. The ink color control system comprises an ink color measuring device, an arithmetic device and an ink color control device, wherein the ink color measuring device is used for shooting images of a printed matter; the arithmetic device is connected with the ink color measuring device and is used for receiving image data of the printed matter, performing chromaticity conversion, and calculating the chromatic aberration between the chromaticity after the conversion and a preset chromaticity, and the uniform error of the chromatic aberration; and the ink color control device is connected with the arithmetic device and is used for changing the ink supply quantity according to the mean error of the chromatic aberration and the chromatic aberration. According to the ink color control system of the embodiment of the invention, the ink color of the printed matter can be automatically regulated, and the fluctuation property and subjectivity of manual regulation of the ink quantity are overcome, so that the ink color of the printed matter tends towards stability, the consistency of the printed matter is ensured, and the outgoing quality of the printed matter is improved.
Description
Technical field
The present invention relates to printer field, especially relate to a kind of mass colour control system and control method thereof.
Background technology
At present, in printing process, the control of China ink amount is by manually finishing, and the further raising of this stability to printing quality, print speed printing speed and the further automation of printing process are all very unfavorable.A shortcoming of Artificial Control China ink amount is inefficiency, owing to affecting the many factors of printing machine ink amount, governing loop is also many, manually can't accurately judge, can only try while transferring.When mass colour changes frequently, often need two or three people to monitor together and regulate.Another shortcoming of Artificial Control China ink amount is because subjective factor causes the China ink amount size adjusted between each board and the different personnel different with regulative mode, causes the colour consistency of printed matter relatively poor.And because manual adjustment is high to workman's experience requirement, workman's psychological burden and labour intensity are all larger.
Summary of the invention
The present invention one of is intended to solve the problems of the technologies described above at least to a certain extent or provides at least a kind of useful commerce to select.
For this reason, one object of the present invention is to propose a kind of mass colour control system that realizes automation adjusting printed matter mass colour.
Another object of the present invention is to propose a kind of control method of above-mentioned mass colour control system.
Mass colour control system according to first aspect present invention embodiment comprises: the mass colour measurement mechanism, and described mass colour measurement mechanism is used for the image of picked-up printed matter; The view data that is used for the receiving described printed matter circumstances in which people get things ready for a trip degree conversion of going forward side by side that links to each other with described mass colour measurement mechanism of arithmetic unit, described arithmetic unit, the colourity behind the described arithmetic unit computational transformation and the aberration of predetermined chromaticity and the mean value error of aberration; With the mass colour control device, described mass colour control device links to each other with described arithmetic unit and changes the ink supply amount for mean value error and described aberration according to described aberration.
Mass colour control system according to the embodiment of the invention, at first, the mass colour measurement mechanism can absorb the image of printed matter, then, the view data that arithmetic unit receives the printed matter detect go forward side by side the conversion of circumstances in which people get things ready for a trip degree and calculate conversion after colourity and the aberration of predetermined chromaticity and the mean value error of described aberration, last mass colour control device is transferred China ink automatically according to mean value error and the described Difference Control printing machine of described aberration, thereby can automatically adjust the mass colour of printed matter, fluctuation and the subjectivity of manual adjustment China ink amount have been overcome, the printed matter mass colour is tended towards stability, guaranteed the uniformity and the outgoing that has improved printed matter of printed matter.
In addition, mass colour control system according to the above embodiment of the present invention can also have following additional technical characterictic:
Particularly, described mass colour measurement mechanism comprises: light source, described light source are used for providing illumination to described printed matter; And camera, described camera is used for absorbing the image of described printed matter.It is simple in structure and easy to use that thereby this mass colour measurement mechanism has advantages of.
Further, described camera is a plurality of, turns up the soil and arrange and two adjacent described cameras have the repetition image pickup scope in a plurality of described cameras interval.Thereby guaranteed the integrality of the printed matter image of picked-up, avoided occurring leaking the phenomenon of bat.
In some embodiments of the invention, described mass colour control device comprises Programmable Logic Controller, link to each other with the described arithmetic unit mean value error that is used for receiving described aberration and the mean value error of described aberration is converted to direct current signal of described Programmable Logic Controller, wherein said Programmable Logic Controller is suitable for linking to each other in order to control described ink foundation roller with ink foundation roller.Thus, this mass colour control device have easy to use, reliability is high, anti-interference intensity is strong, easy for installation and the advantage such as failure rate is low.
In further embodiment of the present invention, described mass colour control device also comprises: central processing unit, described central processing unit link to each other with described arithmetic unit and are used for receiving described aberration and calculate control data group; The first digital-to-analog converter, described the first digital-to-analog converter link to each other with described central processing unit and are used for changing described control data group into the AC controling signal group; A plurality of ink knife group of motors, each described ink knife group of motors includes a plurality of ink knife motors, and a plurality of described ink knife motors are suitable for linking to each other with a plurality of ink knifes accordingly respectively; With a plurality of control drive circuits, each described control drive circuit all links to each other with described the first digital-to-analog converter and is used for receiving described AC controling signal group, and described a plurality of control drive circuits link to each other with described a plurality of ink knife group of motors in order to drive each described ink knife electric machine rotation of each described ink knife group of motors respectively accordingly.Thereby can change the openings of sizes out of ink of ink knife, and then can change by the local ink amount of trickle change printed matter the local aberration of printed matter.
Further, described mass colour control device also comprises a plurality of decelerators, and a plurality of described decelerators link to each other with a plurality of described ink knife motors respectively accordingly and a plurality of described decelerator is suitable for linking to each other with a plurality of described ink knifes accordingly respectively.Thereby openings of sizes out of ink that can finer control ink knife is so that the local ink amount on the printed matter can obtain trickleer control.
In some embodiments of the invention, described mass colour control device also comprises: ink reservoir potentiometer, described ink reservoir potentiometer link to each other with the driving shaft of a plurality of described ink knife motors the driving shaft that is used for measuring a plurality of described ink knife motors rotational angle and export the signal of telecommunication of described rotational angle; With the second digital-to-analog converter, described the second digital-to-analog converter links to each other with a plurality of described control drive circuits with described ink reservoir potentiometer respectively.Thereby the further openings of sizes out of ink of careful control ink knife is so that the local ink amount on the printed matter can be precisely controlled.
Control method according to the mass colour control system of second aspect present invention embodiment, wherein the mass colour control system is the mass colour control system according to first aspect present invention embodiment, comprise: A) utilize the image of described mass colour measurement mechanism picked-up printed matter, then described mass colour measurement mechanism is given described arithmetic unit with the image data transmission of described printed matter; B) described arithmetic unit receives the view data of described printed matter and described arithmetic unit and changes the RGB colourity of a plurality of location points of described printed matter into international standard colourity and blue or green fuchsin yellow black degree, and then described arithmetic unit calculates international standard colourity and the aberration of blue or green fuchsin yellow black degree and described predetermined chromaticity and the mean value error of described aberration of each described location point; And C) when the mean value error of described aberration during greater than first threshold, described arithmetic unit is transferred to described mass colour control device with the mean value error of described aberration, described mass colour control device changes the ink supply amount according to the mean value error of described aberration, the aberration that is not more than first threshold and a part of described location point when the mean value error of described aberration is during greater than Second Threshold, described arithmetic unit is transferred to described mass colour control device with the aberration of the described location point of a part, and described mass colour control device changes the ink supply amount according to the aberration of the described location point of a part.
In some embodiments of the invention, described step C) also comprise: the aberration that is not more than described first threshold and a part of described location point when the mean value error of described aberration is during greater than described Second Threshold, and described central processing unit receives the aberration of a part of described location point and calculates control data group; Described the first digital-to-analog converter changes described control data group into the AC controling signal group, and a plurality of described control drive circuits receive described AC controling signal group and control the rotational angle of driving shaft of a plurality of described ink knife motors according to described AC controling signal group in order to change the size of the opening out of ink of ink knife.Thereby can adjust by the size of opening out of ink of control ink knife the aberration of this at least a portion location point.
In further embodiment of the present invention, described step C) also comprise: utilize described ink reservoir potentiometer measure a plurality of described ink knife motors driving shaft rotational angle and export the signal of telecommunication of described rotational angle, described the second digital-to-analog converter converts the signal of telecommunication of described rotational angle analog signal to and described analog signal is fed back to corresponding described control drive circuit, and described control drive circuit is according to the rotational angle of the driving shaft of the corresponding a plurality of described ink knife motors of described analog signal control.Thereby the further openings of sizes out of ink of careful control ink knife is so that the local ink amount on the printed matter can be precisely controlled.
Additional aspect of the present invention and advantage in the following description part provide, and part will become obviously from the following description, or recognize by practice of the present invention.
Description of drawings
Above-mentioned and/or additional aspect of the present invention and advantage are from obviously and easily understanding becoming the description of embodiment in conjunction with following accompanying drawing, wherein:
Fig. 1 is the schematic diagram according to the annexation of the mass colour control system of the embodiment of the invention;
Fig. 2 is the flow chart according to the control method of the mass colour control system of the embodiment of the invention; With
Fig. 3 is the optical schematic diagram during according to a plurality of camera pickup image in the mass colour control system of the embodiment of the invention.
Reference numeral:
Mass colour control system 100, mass colour measurement mechanism 1, light source 10, camera 11, mass colour control device 2, Programmable Logic Controller 21, central processing unit 22, the first digital-to-analog converter 23, ink knife motor 24, control drive circuit 25, decelerator 26, ink reservoir potentiometer 27, the second digital-to-analog converter 28, printing machine 200, ink foundation roller 3, ink knife 4, ink reservoir 5, arithmetic unit 6, printed matter 300
The specific embodiment
The below describes embodiments of the invention in detail, and the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or the element with identical or similar functions from start to finish.Be exemplary below by the embodiment that is described with reference to the drawings, be intended to for explaining the present invention, and can not be interpreted as limitation of the present invention.
In description of the invention, it will be appreciated that, term " " center "; " vertically "; " laterally "; " length "; " width "; " thickness ", " on ", D score, " front ", " afterwards ", " left side ", " right side ", " vertically ", " level ", " top ", " end " " interior ", " outward ", " clockwise ", orientation or the position relationship of indications such as " counterclockwise " are based on orientation shown in the drawings or position relationship, only be for convenience of description the present invention and simplified characterization, rather than device or the element of indication or hint indication must have specific orientation, with specific orientation structure and operation, therefore can not be interpreted as limitation of the present invention.
In addition, term " first ", " second " only are used for describing purpose, and can not be interpreted as indication or hint relative importance or the implicit quantity that indicates indicated technical characterictic.Thus, one or more these features can be expressed or impliedly be comprised to the feature that is limited with " first ", " second ".In description of the invention, the implication of " a plurality of " is two or more, unless clear and definite concrete restriction is arranged in addition.
In the present invention, unless clear and definite regulation and restriction are arranged in addition, broad understanding should be done in the terms such as term " installation ", " linking to each other ", " connection ", " fixing ", for example, can be to be fixedly connected with, and also can be to removably connect, or connect integratedly; Can be mechanical connection, also can be to be electrically connected; Can be directly to link to each other, also can indirectly link to each other by intermediary, can be the connection of two element internals.For the ordinary skill in the art, can understand as the case may be above-mentioned term concrete meaning in the present invention.
In the present invention, unless clear and definite regulation and restriction are arranged in addition, First Characteristic Second Characteristic it " on " or D score can comprise that the first and second features directly contact, can comprise that also the first and second features are not directly contacts but by the other feature contact between them.And, First Characteristic Second Characteristic " on ", " top " and " above " comprise First Characteristic directly over Second Characteristic and oblique upper, or only represent that the First Characteristic level height is higher than Second Characteristic.First Characteristic Second Characteristic " under ", " below " and " below " comprise First Characteristic under the Second Characteristic and tiltedly, or only represent that the First Characteristic level height is less than Second Characteristic.
Below with reference to a kind of mass colour control system 100 of Fig. 1-Fig. 3 description according to the embodiment of the invention, mass colour control system 100 can be located at printing machine 200 next doors, and mass colour control system 100 can link to each other with printing machine 200 for the mass colour of the printed matter of controlling printing machine 200 printings.
Wherein, the operation principle of printing machine is: the writings and image that will print is first made forme, be contained on the printing machine, then China ink is coated on the place that writings and image is arranged on the forme by artificial or printing machine, be transferred to directly or indirectly again on paper or other stocks (such as textile, metallic plate, plastic cement, leather, plank, glass and pottery), thereby copy the printed matter identical with forme.Particularly, the print couple of each color in the printing machine 200 includes plate cylinder, blanket cylinder, distributor rollers, ink foundation roller 3, a plurality of ink knife 4 and ink reservoir 5 etc., ink foundation roller 3 and ink knife 4 are positioned at ink reservoir 5, the interval preset distance is to form the opening out of ink of ink knife 4 between ink knife 4 and the ink foundation roller 3, thereby so that the printing ink in the ink reservoir 5 can be delivered on the ink foundation roller 3, annexation between each cylinder in the printing machine and printing ink transmission path etc. have been well known to those skilled in the art, just are not described in detail here.In printing process, the printing quality that the China ink amount that is transferred to the printing ink on the stock has directly affected printed matter has namely affected the mass colour of printed matter.The China ink amount that wherein is transferred to the printing ink on the stock is mainly determined by the angular speed of ink foundation roller 3 and the openings of sizes out of ink of ink knife 4.
Mass colour control system 100 according to the embodiment of the invention comprises mass colour measurement mechanism 1, arithmetic unit 6 and mass colour control device 2.
Mass colour measurement mechanism 1 is used for the image of picked-up printed matter 300.Arithmetic unit 6 link to each other with mass colour measurement mechanism 1 view data that be used for to receive printed matter 300 the go forward side by side conversion of circumstances in which people get things ready for a trip degree, the colourity behind arithmetic unit 6 computational transformations and the aberration of predetermined chromaticity and the mean value error of aberration.Mass colour control device 2 links to each other with arithmetic unit 6 and changes the ink supply amount for mean value error and described aberration according to described aberration.
Printing machine is in printing process, and the every interval of printing worker certain hour is to printed matter 300(offset printing paper for example) sample.The printed matter 300 of sampling is placed on the mass colour measurement mechanism 1 of mass colour control system 100, mass colour measurement mechanism 1 begins to absorb the image of printed matter 300, the view data that arithmetic unit 6 receives the printed matter 300 that mass colour measurement mechanisms 1 detect the go forward side by side conversion of circumstances in which people get things ready for a trip degree and the aberration of the colourity behind arithmetic unit 6 computational transformations and predetermined chromaticity and the mean value error of aberration.Then mass colour control device 2 is transferred China ink automatically according to mean value error and the described Difference Control printing machine of described aberration.Wherein, the chromaticity transformation that arithmetic unit carries out is that the RGB colourity with printed matter 300 changes international standard colourity and blue or green fuchsin yellow black degree into, can calculate accurately the described aberration of printed matter 300 and the mean value error of described aberration.Described predetermined chromaticity refers to international standard colourity and the blue or green fuchsin yellow black degree of standard printed matter 400.
Particularly, the aberration (i.e. the first aberration) of the international standard colourity of arithmetic unit 6 calculating printed matters 300 and the international standard colourity of standard printed matter 400 and the mean value error of this aberration, and the aberration (i.e. the second aberration) of the blue or green fuchsin yellow black degree of the blue or green fuchsin yellow black degree of calculating printed matter 300 and standard printed matter 400 and the mean value error of this aberration.
Mass colour control system 100 according to the embodiment of the invention, at first, mass colour measurement mechanism 1 can absorb the image of printed matter 300, then, the view data that arithmetic unit 6 receives the printed matter 300 that detects go forward side by side the conversion of circumstances in which people get things ready for a trip degree and calculate conversion after colourity and the aberration of predetermined chromaticity and the mean value error of described aberration, last mass colour control device 2 is transferred China ink automatically according to mean value error and the described Difference Control printing machine of described aberration, thereby can automatically adjust the mass colour of printed matter 300, fluctuation and the subjectivity of manual adjustment China ink amount have been overcome, printed matter 300 mass colours are tended towards stability, guaranteed the uniformity and the outgoing that has improved printed matter 300 of printed matter 300.
Particularly, mass colour measurement mechanism 1 can comprise light source 10 and camera 11, and wherein, light source 10 is used for providing illumination to printed matter 300, and camera 11 is used for the image of picked-up printed matter 300.It is simple in structure and easy to use that thereby this mass colour measurement mechanism 1 has advantages of.Further, camera 11 is a plurality of, turns up the soil and arrange and two adjacent cameras 11 have the repetition image pickup scope in a plurality of cameras 11 intervals.Thereby guaranteed the integrality of printed matter 300 images of picked-up, avoided occurring leaking the phenomenon of bat.
Wherein, camera 11 can be ccd video camera.As shown in Figure 3, in example of the present invention, camera 11 is four ccd video cameras, is used for the HD image of picked-up printed matter 300.Mass colour measurement mechanism 1 also includes support and camera adjustments mechanism, and a plurality of camera 11 is rack-mount, and the camera angle by each camera 11 of camera adjustments institutional adjustment, to guarantee that picked-up is to clear, complete printed matter 300 images.Light source 10 is two winding displacement light sources, to improve brightness of illumination.
In examples more of the present invention, mass colour measurement mechanism 1 comprises that also light source 10 and camera 11 can move along the bearing of trend of detection platform for the detection platform of placing printed matter 300, and in mobile process, camera 11 can absorb the image of printed matter 300.
In some embodiments of the invention, mass colour control device 2 comprises Programmable Logic Controller 21, link to each other with the arithmetic unit mean value error that is used for receiving described aberration and the mean value error of described aberration is converted to direct current signal of Programmable Logic Controller 21, wherein Programmable Logic Controller 21 is suitable for linking to each other in order to control ink foundation roller 3 with ink foundation roller 3, be transferred to the China ink amount of the whole printing ink on the stock with change, thereby change the aberration of overall importance of printed matter 300.Thus, this mass colour control device 2 have easy to use, reliability is high, anti-interference intensity is strong, easy for installation and the advantage such as failure rate is low.
In further embodiment of the present invention, mass colour control device 2 also comprises: central processing unit 22, the first digital-to-analog converter 23, a plurality of ink knife group of motors 24 and a plurality of control drive circuit 25.Wherein, central processing unit 22 links to each other with arithmetic unit 6 and is used for receiving described aberration and calculates control data group, and the first digital-to-analog converter 23 links to each other with central processing unit 22 and changes the AC controling signal group into for controlling the data group.Each ink knife group of motors includes a plurality of ink knife motors 24, and a plurality of ink knife motors 24 are suitable for linking to each other with a plurality of ink knifes 4 accordingly respectively.In other words, an ink knife motor 24 can link to each other with an ink knife 4 in order to drive this ink knife motion.Each control drive circuit 25 all links to each other with the first digital-to-analog converter 23 and is used for receiving the AC controling signal group, and a plurality of control drive circuits 25 link to each other with a plurality of ink knife group of motors accordingly respectively and rotate in order to drive each ink knife motor 24 of each ink knife group of motors.In other words, a control drive circuit 25 links to each other with an ink knife group of motors in order to drive each ink knife motor 24 rotation of this ink knife group of motors.
Particularly, at first, the described aberration that arithmetic unit will calculate is delivered to central processing unit 22, and central processing unit 22 calculates control data group.Then the first digital-to-analog converter 23 control data group that will receive changes the AC controling signal group into, then corresponding control drive circuit 25 receives the AC controling signal group to drive corresponding ink knife motor 24 rotations, rotate in order to change the openings of sizes out of ink of ink knife 4 thereby drive ink knife 4, and then can change by the local ink amount that fine changes printed matter 300 the local aberration of printed matter 300.
Further, mass colour control device 2 also comprises a plurality of decelerators 26, and a plurality of decelerators 26 link to each other with a plurality of ink knife motors 24 respectively accordingly and a plurality of decelerator 26 is suitable for linking to each other with a plurality of ink knifes accordingly respectively.In other words, a decelerator 26 can link to each other with an ink knife with an ink knife motor 24 respectively, and namely an ink knife motor 24 can link to each other with an ink knife by a decelerator 26.By the decelerator 26 that links to each other with ink knife with ink knife motor 24 is set respectively, thereby can more meticulously, accurately control the openings of sizes out of ink of ink knife 4, so that the local ink amount on the printed matter 300 can obtain more fine, more accurately control.
In some embodiments of the invention, mass colour control device 2 also comprises: ink reservoir potentiometer 27 and the second digital-to-analog converter 28.Wherein, ink reservoir potentiometer 27 link to each other with the driving shaft of a plurality of ink knife motors 24 driving shaft that is used for measuring a plurality of ink knife motors 24 rotational angle and export the signal of telecommunication of rotational angle.The second digital-to-analog converter 28 links to each other with a plurality of control drive circuits 25 with ink reservoir potentiometer 27 respectively.Then the signal of telecommunication of the rotational angle of the driving shaft of the second digital-to-analog converter 28 reception ink knife motors 24 converts this signal of telecommunication to analog signal and feeds back to corresponding control drive circuit 25, thereby can form closed-loop controls to ink knife motor 24.Can further meticulously, accurately control thus the openings of sizes out of ink of ink knife 4, so that the local ink amount on the printed matter 300 can accurately be controlled.
In some embodiments of the invention, mass colour control device 2 also further comprises console, be provided with the control system that links to each other with central processing unit with Programmable Logic Controller in this console, and this console is provided with control button and display screen 7, can input initial control data and change control data, and also can monitor black change of variable situation by display screen 7, thereby can realize manual intervention control.
Describe control method according to the mass colour control system 100 of the embodiment of the invention below with reference to Fig. 1 and Fig. 2, this mass colour control system 100 is the mass colour control system 100 according to above-described embodiment.
Control method according to the mass colour control system of the embodiment of the invention comprises:
A) utilize the image of mass colour measurement mechanism 1 picked-up printed matter 300, then mass colour measurement mechanism 1 with the image data transmission of printed matter 300 to arithmetic unit 6.
B) view data of arithmetic unit 6 reception printed matters 300 and arithmetic unit change the RGB colourity of a plurality of location points of printed matter 300 into international standard colourity and blue or green fuchsin yellow black degree, and then arithmetic unit calculates international standard colourity and the aberration of blue or green fuchsin yellow black degree and predetermined chromaticity and the mean value error of aberration of each location point.Wherein, a plurality of location points of printed matter 300 are corresponding one by one with the position of a plurality of ink knifes, and namely the length of an ink knife is representing a location point on the printed matter 300.
C) when the mean value error of aberration during greater than first threshold, arithmetic unit 6 is transferred to mass colour control device 2 with the mean value error of described aberration, mass colour control device 2 changes the ink supply amount according to the mean value error of described aberration, the aberration that is not more than first threshold and a part of described location point when the mean value error of described aberration is during greater than Second Threshold, arithmetic unit 6 is transferred to mass colour control device 2 with the aberration of the described location point of a part, and mass colour control device 2 changes the ink supply amount according to the aberration of the described location point of a part.
Wherein, arithmetic unit 6 changes the RGB colourity (RGB) of each location point of printed matter 300 into international standard colourity LAB, and arithmetic unit 6 calculates the international standard colourity of each location point (x, y) and the international standard colourity L of standard printed matter 400.A。B。Aberration Δ E(x, y) the mean value error Δ E of (the first aberration) and this aberration (the first aberration), can utilize any known mode to change the RGB colourity (RGB) of each location point of printed matter 300 into international standard colourity LAB.
Aberration Δ E(x, y)=LAB (x, y)-L.A。B。(x,y)
Mean value error
Arithmetic unit 6 is converted to yellow black (CMYK) colourity of blue or green fuchsin with the RGB colourity (RGB) of each location point of printed matter 300, and arithmetic unit 6 calculates the blue or green fuchsin yellow black degree of each location point (x, y) and the blue or green fuchsin yellow black degree C of standard printed matter 400.M。Y。K。Aberration Δ CMYK(x, y) the mean value error Δ CMYK of (the second aberration) and this aberration (the second aberration) can utilize any known mode that the RGB colourity (RGB) of each location point of printed matter 300 is converted to yellow black (CMYK) colourity of blue or green fuchsin.
Aberration Δ CMYK(x, y)=CMYK (x, y)-C.M。Y。K。(x,y)
Mean value error
Change international standard colourity into by the RGB colourity with each location point of printed matter 300 and come the color of printed matter 300 is carried out the aberration evaluation, can obtain versicolor Average color-difference, guaranteed that versicolor value of chromatism is balanced.Come the color of printed matter 300 is carried out the aberration evaluation and change blue or green fuchsin yellow black degree into by the RGB colourity with each location point of printed matter 300, then be to print because when printing can only be used yellow black four looks of blue or green fuchsin, thereby can the aberration of printed matter 300 accurately be calculated in conjunction with international standard colourity and blue or green fuchsin yellow black degree, and then can accurately control the mass colour of printed matter 300.
First threshold comprises First International's standard colorimetric threshold value and the first blue or green fuchsin yellow black degree threshold value, and Second Threshold comprises Second International's standard colorimetric threshold value and the second blue or green fuchsin yellow black degree threshold value.Particularly, when mean value error Δ E greater than First International's standard colorimetric threshold value and mean value error Δ CMYK during greater than the first blue or green fuchsin yellow black degree threshold value, arithmetic unit 6 is transferred to mass colour control device 2 with mean value error Δ E and mean value error Δ CMYK, and mass colour control device 2 changes the ink supply amount according to mean value error Δ E and mean value error Δ CMYK.
When mean value error Δ E is not more than the aberration Δ E(x that First International's standard colorimetric threshold value and mean value error Δ CMYK are not more than the first blue or green fuchsin yellow black degree threshold value and a part of described location point, y) greater than the aberration Δ CMYK(x of Second International's standard colorimetric threshold value and this part described location point, during y) greater than the second blue or green fuchsin yellow black degree threshold value, arithmetic unit 6 is with the aberration Δ E(x of this part described location point, y) and the aberration Δ CMYK(x of this part described location point, y) be transferred to mass colour control device 2, mass colour control device 2 is according to the aberration Δ E(x of this part described location point, y) and aberration Δ CMYK(x, the y of this part described location point) change the ink supply amount
In one embodiment of the invention, arithmetic unit 6 can be transferred to Programmable Logic Controller 21 with mean value error Δ E and mean value error Δ CMYK.Programmable Logic Controller 21 can be converted to mean value error Δ E and mean value error Δ CMYK direct current signal and control ink foundation roller 3 by this direct current signal.
Further, according to the step C in the control method of the mass colour control system of the embodiment of the invention) can also comprise:
The aberration that is not more than described first threshold and a part of described location point when the mean value error of described aberration is during greater than described Second Threshold, and the aberration that central processing unit 22 receives a part of described location point also calculates control data group.
The first digital-to-analog converter 23 will be controlled the data group and change the AC controling signal group into, and a plurality of control drive circuits receive the AC controling signal groups and control the rotational angle of driving shaft of a plurality of ink knife motors 24 according to the AC controling signal group in order to change the size of the opening out of ink of ink knife.
Particularly, when mean value error Δ E is not more than the aberration Δ E(x that First International's standard colorimetric threshold value and mean value error Δ CMYK are not more than the first blue or green fuchsin yellow black degree threshold value and a part of described location point, y) greater than the aberration Δ CMYK(x of Second International's standard colorimetric threshold value and this part described location point, during y) greater than the second blue or green fuchsin yellow black degree threshold value, central processing unit 22 receives the aberration Δ E(x of this part described location point of arithmetic unit 6 transmission, y) and aberration Δ CMYK(x, the y of this part described location point) and calculate control data group.The openings of sizes out of ink of ink knife can be changed thus, and then the local aberration of printed matter 300 can be changed by the local ink amount that fine changes printed matter 300.
Further, according to the step C in the control method of the mass colour control system of the embodiment of the invention) can also comprise: utilize ink reservoir potentiometer 27 measure a plurality of ink knife motors 24 driving shaft rotational angle and export the signal of telecommunication of rotational angle, the second digital-to-analog converter 28 converts the signal of telecommunication of rotational angle analog signal to and analog signal is fed back to corresponding control drive circuit 25, and control drive circuit 25 is controlled the rotational angle of the driving shaft of corresponding a plurality of ink knife motors 24 according to analog signal.
In other words, the second digital-to-analog converter 28 feeds back to the control drive circuit 25 that links to each other with this ink knife motor 24 with the analog signal of the rotational angle of the driving shaft of ink knife motor 24, and this control drive circuit 25 is controlled the rotational angle of the driving shaft of this ink knife motor 24 according to the analog signal that receives.Can further meticulously, accurately control thus the openings of sizes out of ink of ink knife 4, so that the local ink amount on the printed matter 300 can accurately be controlled.
The below describes the control method according to the mass colour control system of the embodiment of the invention in detail, and above-mentioned mean value error Δ E and Δ CMYK can be described as aberration of overall importance, aberration Δ E(x, y) and Δ CMYK(x, y) be local aberration.First International's standard colorimetric threshold value is δ E, and the first blue or green fuchsin yellow black degree threshold value is δ CMYK, and Second International's standard colorimetric threshold value is δ E(x, y), the second blue or green fuchsin yellow black degree threshold value δ CMYK(x, y).
At first, utilize the image of mass colour measurement mechanism 1 picked-up printed matter 300, then arithmetic unit 6 receives the view data of this printed matter 300, and arithmetic unit 6 changes the RGB colourity of a plurality of location points of printed matter 300 into international standard colourity and blue or green fuchsin yellow black degree, and then arithmetic unit 6 calculates international standard colourity and the aberration of blue or green fuchsin yellow black degree and predetermined chromaticity and the mean value error of aberration of each location point.
When mean value error Δ E greater than First International's standard colorimetric threshold value and mean value error Δ CMYK during greater than the first blue or green fuchsin yellow black degree threshold value, be Δ E＞δ Δ E, during Δ CMYK＞δ CMYK, illustrate that aberration of overall importance has appearred in printed matter 300, then the mean value error of this aberration is transferred to the Programmable Logic Controller 21 in the mass colour control device 2, Programmable Logic Controller is converted to direct current signal with this aberration, so that the rotational angular velocity of ink foundation roller 3 is controlled, the global color of printed matter 300 can be changed immediately.
When mean value error Δ E is not more than the aberration Δ E(x that First International's standard colorimetric threshold value and mean value error Δ CMYK are not more than the first blue or green fuchsin yellow black degree threshold value and a part of described location point, y) greater than the aberration Δ CMYK(x of Second International's standard colorimetric threshold value and this part described location point, during y) greater than the second blue or green fuchsin yellow black degree threshold value, be Δ E＜δ Δ E, Δ CMYK＜δ CMYK, and Δ E(x, y)〉δ E(x, y), Δ CMYK(x, y)〉δ CMYK(x, y), though the global color that is printed matter 300 meets the demands, but local aberration occurred, at this moment, central processing unit 22 receives the aberration Δ E(x of the location point of this part, y) and aberration Δ CMYK(x, y) and calculate the control data value.
Then the first digital-to-analogue variator 23 will be controlled data value and change the AC controling signal group into, corresponding control drive circuit 25 receives the AC controling signal group, then this control drive circuit 25 drives corresponding ink knife motor 24 rotations, when rotating, ink knife motor 24 slows down by decelerator 26, thereby the openings of sizes out of ink of control ink knife that can be careful, and then can change by the local ink amount of trickle change printed matter 300 the local aberration of printed matter 300.
Wherein, ink reservoir potentiometer 27 is installed on the driving shaft of ink knife motor 24, the accurate signal of telecommunication of the corner angle of the driving shaft of these ink reservoir potentiometer 27 exportable ink reservoir motors 24, after the second digital-to-analogue variator 27 changes the signal of telecommunication that receives into control signal, then control drive circuit 25 and receive this control signal to drive 24 rotations of ink knife motor, thereby formed the accurate control of closed loop, so that the China ink amount on the printed matter 300 can be further precisely controlled.
In the description of this specification, the description of reference term " embodiment ", " some embodiment ", " example ", " concrete example " or " some examples " etc. means to be contained at least one embodiment of the present invention or the example in conjunction with specific features, structure, material or the characteristics of this embodiment or example description.In this manual, the schematic statement of above-mentioned term not necessarily referred to identical embodiment or example.And the specific features of description, structure, material or characteristics can be with suitable mode combinations in any one or more embodiment or example.
Although the above has illustrated and has described embodiments of the invention, be understandable that, above-described embodiment is exemplary, can not be interpreted as limitation of the present invention, those of ordinary skill in the art is not in the situation that break away from principle of the present invention and aim can change above-described embodiment within the scope of the invention, modification, replacement and modification.
Claims (10)
1. a mass colour control system is characterized in that, comprising:
The mass colour measurement mechanism, described mass colour measurement mechanism is used for the image of picked-up printed matter;
The view data that is used for the receiving described printed matter circumstances in which people get things ready for a trip degree conversion of going forward side by side that links to each other with described mass colour measurement mechanism of arithmetic unit, described arithmetic unit, the colourity behind the described arithmetic unit computational transformation and the aberration of predetermined chromaticity and the mean value error of aberration; With
Mass colour control device, described mass colour control device link to each other with described arithmetic unit and change the ink supply amount for mean value error and described aberration according to described aberration.
2. mass colour control system according to claim 1 is characterized in that, described mass colour measurement mechanism comprises:
Light source, described light source are used for providing illumination to described printed matter; With
Camera, described camera is used for absorbing the image of described printed matter.
3. mass colour control system according to claim 2 is characterized in that, described camera is a plurality of, turns up the soil and arrange and two adjacent described cameras have the repetition image pickup scope in a plurality of described cameras interval.
4. mass colour control system according to claim 1, it is characterized in that, described mass colour control device comprises Programmable Logic Controller, link to each other with the described arithmetic unit mean value error that is used for receiving described aberration and the mean value error of described aberration is converted to direct current signal of described Programmable Logic Controller, wherein said Programmable Logic Controller is suitable for linking to each other in order to control described ink foundation roller with ink foundation roller.
5. mass colour control system according to claim 1 is characterized in that, described mass colour control device also comprises:
Central processing unit, described central processing unit link to each other with described arithmetic unit and are used for receiving described aberration and calculate control data group;
The first digital-to-analog converter, described the first digital-to-analog converter link to each other with described central processing unit and are used for changing described control data group into the AC controling signal group;
A plurality of ink knife group of motors, each described ink knife group of motors includes a plurality of ink knife motors, and a plurality of described ink knife motors are suitable for linking to each other with a plurality of ink knifes accordingly respectively; With
A plurality of control drive circuits, each described control drive circuit all links to each other with described the first digital-to-analog converter and is used for receiving described AC controling signal group, and described a plurality of control drive circuits link to each other with described a plurality of ink knife group of motors in order to drive each described ink knife electric machine rotation of each described ink knife group of motors respectively accordingly.
6. mass colour control system according to claim 5, it is characterized in that, described mass colour control device also comprises a plurality of decelerators, and a plurality of described decelerators link to each other with a plurality of described ink knife motors respectively accordingly and a plurality of described decelerator is suitable for linking to each other with a plurality of described ink knifes accordingly respectively.
7. mass colour control system according to claim 5 is characterized in that, described mass colour control device also comprises:
Ink reservoir potentiometer, described ink reservoir potentiometer link to each other with the driving shaft of a plurality of described ink knife motors the driving shaft that is used for measuring a plurality of described ink knife motors rotational angle and export the signal of telecommunication of described rotational angle; With
The second digital-to-analog converter, described the second digital-to-analog converter link to each other with a plurality of described control drive circuits with described ink reservoir potentiometer respectively.
One kind according to claim 1-4 in the control method of each described mass colour control system, it is characterized in that, comprising:
A) utilize described mass colour measurement mechanism to absorb the image of printed matter, then described mass colour measurement mechanism is given described arithmetic unit with the image data transmission of described printed matter;
B) described arithmetic unit receives the view data of described printed matter and described arithmetic unit and changes the RGB colourity of a plurality of location points of described printed matter into international standard colourity and blue or green fuchsin yellow black degree, and then described arithmetic unit calculates international standard colourity and the aberration of blue or green fuchsin yellow black degree and described predetermined chromaticity and the mean value error of described aberration of each described location point; With
C) when the mean value error of described aberration during greater than first threshold, described arithmetic unit is transferred to described mass colour control device with the mean value error of described aberration, described mass colour control device changes the ink supply amount according to the mean value error of described aberration, the aberration that is not more than first threshold and a part of described location point when the mean value error of described aberration is during greater than Second Threshold, described arithmetic unit is transferred to described mass colour control device with the aberration of the described location point of a part, and described mass colour control device changes the ink supply amount according to the aberration of the described location point of a part.
9. control method according to claim 8 is characterized in that, described mass colour control system is for according to claim 5 or 6 described mass colour control systems, described step C) also comprise:
The aberration that is not more than described first threshold and a part of described location point when the mean value error of described aberration is during greater than described Second Threshold, and described central processing unit receives the aberration of a part of described location point and calculates control data group;
Described the first digital-to-analog converter changes described control data group into the AC controling signal group, and a plurality of described control drive circuits receive described AC controling signal group and control the rotational angle of driving shaft of a plurality of described ink knife motors according to described AC controling signal group in order to change the size of the opening out of ink of ink knife.
10. control method according to claim 9, it is characterized in that, described mass colour control system is mass colour control system according to claim 7, described step C) also comprise: utilize described ink reservoir potentiometer measure a plurality of described ink knife motors driving shaft rotational angle and export the signal of telecommunication of described rotational angle, described the second digital-to-analog converter converts the signal of telecommunication of described rotational angle analog signal to and described analog signal is fed back to corresponding described control drive circuit, and described control drive circuit is according to the rotational angle of the driving shaft of the corresponding a plurality of described ink knife motors of described analog signal control.
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