CN106556611A - Chromatograp defect automatic checkout system and detection method based on machine vision - Google Patents

Chromatograp defect automatic checkout system and detection method based on machine vision Download PDF

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Publication number
CN106556611A
CN106556611A CN201611114674.XA CN201611114674A CN106556611A CN 106556611 A CN106556611 A CN 106556611A CN 201611114674 A CN201611114674 A CN 201611114674A CN 106556611 A CN106556611 A CN 106556611A
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CN
China
Prior art keywords
image
image processing
chromatograp
machine vision
automatic checkout
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Pending
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CN201611114674.XA
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Chinese (zh)
Inventor
付冲
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Jiangsu Wei Lu Robot Technology Co Ltd
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Jiangsu Wei Lu Robot Technology Co Ltd
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Priority to CN201611114674.XA priority Critical patent/CN106556611A/en
Publication of CN106556611A publication Critical patent/CN106556611A/en
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/84Systems specially adapted for particular applications
    • G01N21/88Investigating the presence of flaws or contamination
    • G01N21/95Investigating the presence of flaws or contamination characterised by the material or shape of the object to be examined
    • G01N21/956Inspecting patterns on the surface of objects
    • G01N21/95607Inspecting patterns on the surface of objects using a comparative method

Abstract

The invention discloses a kind of chromatograp defect automatic checkout system and detection method based on machine vision, automatic checkout system includes:Image capturing system, the image processing system being connected with image capturing system, the display being connected with image processing system and control system, the leaflet image for collecting and color information are converted to by described image acquisition system can be by the digital signal of image processing system process, described image processing system carries out computing to digital signal, extract target characteristic, then judged result is exported further according to default criterion, the judged result of image processing system is exported by the display with control system.By the way, the present invention can improve the flexible and automaticity of production, replace artificial vision, mitigate the labor intensity of workman, improve production efficiency and automaticity, reduce defect rate.

Description

Chromatograp defect automatic checkout system and detection method based on machine vision
Technical field
The present invention relates to automatic checkout system field, more particularly to a kind of chromatograp defect based on machine vision Automatic checkout system and detection method.
Background technology
The development for appearing as human society of printing technology is made that tremendous contribution, with the fast development of printing technology, Leaflet is full of in each corner of society, closely related with the life of people.Although printer performance of new generation speed, The aspects such as quality are lifted very greatly, but current printing technology itself still cannot prevent the appearance of various printing defects, it is impossible to Society is met to the higher and higher demand of press quality.
The mass defect of leaflet mainly includes chromatography deviation, misalignment, surface blot, bites, misplaces, wrinkling, scraping Wound and some special defects etc..It is on stricti jurise, all to have mass defect with the inconsistent leaflet of printed original, but Requirement of the human eye on leaflet is clearly to be reproduced as standard with do not affect image, even if meeting leaflet and the printing of the standard It is qualified that original copy difference but still can be considered as.The quality of print quality should be printing business and end user with regard to a certain specific print Brush product through consulting, it is determined that an agreement, the agreement must have clear and definite, quantifiable reasonable description, only not reach rule The leaflet of provisioning request is just considered as mass defect.In view of the multiformity of the complexity of printing technology and leaflet defect, in face Ensure in color, level, definition, concordance that good and continual and steady printing quality is just particularly important.
Traditional leaflet detection technique includes visual subjective methods and instrument detection method.Visual subjective methods are referred to original copy Basis, directly or by magnifier control specimen page is artificially contrasted, subjective assessment print quality quality.Although the method is simple It is single flexibly, but the difference of knowledge, technical ability due to appraiser, experience, hobby, physiology and aesthetic standards etc., cause to evaluate Accuracy and less stable.Instrument detection method refers to each quality by special instrument and equipment and instrument to leaflet Link makes quantitative analyses, makes objective appraisal with reference to the quality standard for replicating, and the print quality inspection instrument for using has respectively Densimeter, colorimeter etc. are planted, such as spectrophotometer is the light reflection and absorption using the ink of different colours to different wave length The different principle of ratio, the spectral characteristic reflected by analysis measurement leaflet is reflecting the difference of printing color.Instrument is examined Survey method can provide theoretical foundation for objective evaluation print quality, overcome the defects such as the unstability of visual subjective methods, Print field has a wide range of applications, but the theoretical foundation of this detection mode not only has its inexactness and limitation, and And these detecting instruments typically can only be detected to the region of 10mm2 or so, thus control strip plus must be printed, it is impossible to complete straight Ground connection obtains the information of our requirements from printed picture.Traditional printing product examine survey technology also has a very important defect, It is that they can only be sampled detection after being completed for printing, once occurring quality problems in printing process, often results in print Brush material and a large amount of wastes in man-hour, increase enterprise's production capacity.
In order to be pinpointed the problems in printing process in time, stroboscopic lamp on some printing production lines, is commonly installed, is utilized The persistence of vision principle of stroboscopic lamp quick-flash and human eye, allows the operator to observe dynamic leaflet pattern, finds Great printing defects in production, but it is unstable and during to version in print speed printing speed, still cannot find in time to print image Mass change, and the high light that stroboscopic lamp constantly flashes for a long time can be caused serious injury to the vision of operator, therefore Progressively it is eliminated on medium-to-high grade printing equipment by the way of stroboscopic lamp detection, by more advanced printing video capture Systematic substitution.
The end of the eighties in last century occurs in that the printing video capture system for printing production line, replaces people with industrial camera Eye, captures the printing image of the ad-hoc location on production line, and after process is digitized to image, in the screen of computer On show clearly still image, can manually adjust camera watch different parts printing quality, the maximum of this system Advantage is just that of avoiding injury of the stroboscopic lamp to human eye, while can make to watch printed patterns apparent, but this image Capturing system is also a blank of Vision Builder for Automated Inspection, because system is mainly video capture and display function, is limited by When the performance of computer-chronograph, only minimal amount of primary image processing function, so this system can only be used as artificial observation One aid, it is impossible to fundamentally improve printing quality.
Until the beginning of the nineties in last century, as the disposal ability of computer is further improved, it is real have automatically process and The Vision Builder for Automated Inspection of identification function just starts appearance, and the on-line checking of leaflet is by image processing techniquess and print principle phase With reference to and formed a kind of suitable high speed printing fully-automated synthesis method.The advantage of on-line checking is mainly manifested in following two Aspect:First, on-line checking can more accurately detect fine defects.Such as leaflet contrast color than it is stronger when, Human eye is just it can be found that be difficult to keep continually and steadily, if in color more than the defect of more than 0.3mm, and the detection quality for obtaining Be identical, print quality especially detected in the leaflet of light color system, human eye it can be found that defect then at least need two Ten gray levels;And printed on line testing equipment then can find the defect of 0.1mm sizes easily, and only need a gray level Difference just can be with.Secondly, on-line checking improves production efficiency.Master of the quality evaluation of on-line detecting system independently of operator See and judge, regulation in running is implemented more rapidly to be easier, and substantially increases detection speed, when there is mass defect When, producers can solve produced problem in time according to the real-time report in scene, also mitigate while reducing percent defective The labor intensity of personnel;And management personnel can also analyze testing result, production process is tracked, improve management benefit.Machine Vision technique is also not only limited to detect after the print of printing quality, progressively each ring such as detection and printing process control before print Play a significant role in section, the detection of such as printing plate, the detection of stock, printing in ink amount size detection and automatically control.
But regrettably, as the threshold of current country's printing industry is relatively low, printing house's substantial amounts but scale Less than normal, only minority requires that to printing quality enterprise that is very strict or forming brand benefit is had begun to use and regarded based on machine The major part such as the quality detecting system of feel, such as RMB, tax reciept, bankbook, identity card, lottery ticket, cigarette bag is realized to key message Detection, and other great majority production users for the leaflet online detection instrument based on machine vision degree of concern still Not enough.Certainly there is such case, in addition to the relation of user's own limitations, some shortcomings are still suffered from visual detection equipment There are much relations.First, the function of system can not meet the requirement of user Geng Gao comprehensively.No matter design how complicated machine is regarded Feel that detecting system is that its degree of intelligence is also very low relative to the aspect is short of by manual detection, in the face of the adaptability to changes of new situation General poor, a changing function for seeming very little is likely to cause the change of whole vision detection system.Secondly, detection sets Still costly, it is excessive that large-scale redevelopment production line can cause production user disposably to put into standby price, affects testing equipment Popularity.
The content of the invention
The invention mainly solves the technical problem of:For the deficiencies in the prior art, there is provided a kind of based on machine vision Chromatograp defect automatic checkout system, it is possible to increase the flexible and automaticity of production, replaces artificial vision, mitigates work The labor intensity of people, improve production efficiency and automaticity, reduce defect rate.
To solve above-mentioned technical problem, one aspect of the present invention is:There is provided a kind of based on machine vision Chromatograp defect automatic checkout system, including:Image capturing system, the image procossing system being connected with image capturing system System, the display that is connected with image processing system and control system, described image acquisition system by the leaflet image for collecting and Color information is converted to can be transported to digital signal by the digital signal of image processing system process, described image processing system Calculating, extracting target characteristic, then judged result is exported further according to default criterion, the display and control system are by image The judged result output of processing system.
In a preferred embodiment of the present invention, described image acquisition system is by light source, camera lens, image pick-up card and some Ccd video camera is constituted.
In a preferred embodiment of the present invention, some ccd video cameras include some preposition ccd video cameras and some Rearmounted ccd video camera.
In a preferred embodiment of the present invention, it is described display with control system include monitoring interface, process controller and Alarm device.
In a preferred embodiment of the present invention, the alarm device is alarm lamp.
In a preferred embodiment of the present invention, the process controller includes control knob, safe grating, keyboard and mouse Drawer, sorter.
A kind of detection method of the chromatograp defect automatic checkout system based on machine vision is provided also, its feature exists In comprising the steps:
1)Standard picture is gathered by image capturing system, the standard picture for collecting is converted into into digital signal, it is accurate as differentiating Then;
2)Testing image is gathered by image capturing system, and that the testing image for collecting is converted into being subsequently can by computer Series of digital signals;
3)By image processing system by step 2)Digital signal and step 1)The middle digital signal as criterion is carried out With positioning, and defective in quality image is found out after calculation process using image processing method, and export judged result;
4)The judged result of image processing system is exported with control system by being shown.
In a preferred embodiment of the present invention, described image processing method includes grey level quantization, the binaryzation of image, figure The smooth and sharpening and image boundary detection of picture.
In a preferred embodiment of the present invention, the judged result includes the type of mistake and corresponding image information.
The invention has the beneficial effects as follows:By being detected using multiple preposition and rearmounted ccd video camera simultaneously, Neng Goujian The problems such as deep or light mass colour, shade, lines break, word lacks residual is measured, accuracy of detection is improved, while asking in detection mass During topic, alarm signal can be sent, and shows the type and corresponding image information of mistake, moreover it is possible to will be had by online sorter The product of problem is picked out, final to realize actual detection, measurement and control, and can improve the flexibility and automatization's journey of production Degree, replaces artificial vision, mitigates the labor intensity of workman, improve production efficiency and automaticity, reduces defect rate.
Description of the drawings
Fig. 1 is a kind of system diagram of the chromatograp defect automatic checkout system based on machine vision of the present invention;
In accompanying drawing, the labelling of each part is as follows:1st, image capturing system, 2, image processing system, 3, show and control system.
Specific embodiment
Below in conjunction with the accompanying drawings presently preferred embodiments of the present invention is described in detail, so that advantages and features of the invention energy It is easier to be readily appreciated by one skilled in the art, apparent clearly defines so as to make to protection scope of the present invention.
Fig. 1 is referred to, the embodiment of the present invention includes:
A kind of chromatograp defect automatic checkout system based on machine vision, including:Image capturing system 1, and image adopt Image processing system 2, the display being connected with image processing system 2 and control system 3 that collecting system 1 is connected.
Its detection method comprises the steps:
1)Standard picture is gathered by image capturing system, the standard picture for collecting is converted into into digital signal, it is accurate as differentiating Then;
2)Testing image is gathered by image capturing system, and that the testing image for collecting is converted into being subsequently can by computer Series of digital signals;
3)By image processing system by step 2)Digital signal and step 1)The middle digital signal as criterion is carried out With positioning, and defective in quality image is found out after calculation process using image processing method, and export judged result;Institute Stating image processing method includes grey level quantization, the binaryzation of image, the smooth and sharpening of image and image boundary detection;
4)The judged result of image processing system is exported with control system by being shown, the judged result includes the type of mistake And corresponding image information.
Responsible be converted to the leaflet image for collecting and color information of described image acquisition system 1 can be by image procossing The digital signal of the process of system 2, due to being emphasized based on the chromatograp defect automatic checkout system of machine vision for the application Speed and precision, therefore image capturing system 1 needs to provide clearly data image signal accurately and in time.Described image is adopted Collecting system is made up of light source, camera lens, image pick-up card and some ccd video cameras.
Some ccd video cameras include some preposition ccd video cameras and some rearmounted ccd video cameras.Before multiple Put and rearmounted ccd video camera is while detected that fusion multiaxis, the detection platform of low vibrations improve accuracy of detection.
Described image processing system 2 carries out various fortune to digital signal according to information such as pixel distribution, brightness and colors Calculate, extract target characteristic, then judged result is exported further according to default criterion.
In the chromatograp defect automatic checkout system based on machine vision of the application, standard picture and mapping is treated As being obtained in different time through image capturing system 1.Image processing system 2 by processing to testing image, It is allowed to carry out matching positioning with standard picture, then again testing image is detected, defective in quality image is found out, and is given Go out the print quality problem corresponding to the image.
In image processing system 2, the mainly modern digital image processing of utilization, the application of various algorithms are caused Image detection is possibly realized.Image procossing and analysis may be defined as obtaining using serial of methods, correct, strengthen, convert or pressing The technology of contracting visual image.Mainly use in the chromatograp defect automatic checkout system based on machine vision of the application Image processing method have grey level quantization, the binaryzation of image, image it is smooth with sharpen, the key images such as image boundary detection Treatment technology.
The judged result of image processing system 2 is exported by the display with control system 3.The display and control system 3 Output is not image video signal, but the testing result after calculation process.Outut device is typically connected with process, Therefore, the display includes monitoring interface, process controller and alarm device with control system 3.
The alarm device is alarm lamp.When quality problems are detected, alarm signal can be sent, and on monitoring interface Show the type and corresponding image information of mistake.
The process controller includes control knob, safe grating, keyboard and mouse drawer, sorter.The system is by height Fast video camera is monitored inspection to each mobile phone color box in producing line, by contrasting with the normal data in system database, leads to Cross online sorter to pick out problematic product.
The highest detection precision of the system reaches 0.001mm2, can learn automatically to set examination criteria, be capable of detecting when ink Colour shading, shade, lines broken string, word lack residual etc..
The key technical indexes of the system has:
1)Image taking speed:Highest 100fps;
2)Detection time:< 15s;
3)Operating ambient temperature:0-50℃;
4)False pass rate:< 0.05%;
5)False failure rate:< 1%;
6)Production capacity:≥150PCS/H;
7)Humidity:35-85% is without condensation.
The system application machine vision principle, sets up printing quality vision detection system, obtains image by ccd video camera And digital signal is converted into, then signal is carried out processing, analyzed using computer, it is final to realize actual detection, measurement and control System.
Present invention is disclosed a kind of chromatograp defect automatic checkout system based on machine vision, by using multiple Preposition and rearmounted ccd video camera detected simultaneously, is capable of detecting when that deep or light mass colour, shade, lines broken string, word lack residual Deng improving accuracy of detection, while when quality problems are detected, alarm signal can be sent, and show the type of mistake and corresponding Image information, moreover it is possible to problematic product is picked out by online sorter, it is final to realize actual detection, measurement And control, the flexible and automaticity of production can be improved, replaces artificial vision, mitigate the labor intensity of workman, improve life Efficiency and automaticity are produced, defect rate is reduced.
Embodiments of the invention are the foregoing is only, the scope of the claims of the present invention is not thereby limited, it is every using this Equivalent structure or equivalent flow conversion that bright description and accompanying drawing content are made, or directly or indirectly it is used in other related skills Art field, is included within the scope of the present invention.

Claims (9)

1. a kind of chromatograp defect automatic checkout system based on machine vision, it is characterised in that include:Image acquisition system System, the image processing system being connected with image capturing system, the display being connected with image processing system and control system, the figure As the leaflet image for collecting and color information are converted to the digital signal that can be processed by image processing system by acquisition system, Described image processing system carries out computing to digital signal, extracts target characteristic, then exports further according to default criterion The judged result of image processing system is exported by judged result, the display with control system.
2. the chromatograp defect automatic checkout system based on machine vision according to claim 1, it is characterised in that Described image acquisition system is made up of light source, camera lens, image pick-up card and some ccd video cameras.
3. the chromatograp defect automatic checkout system based on machine vision according to claim 2, it is characterised in that Some ccd video cameras include some preposition ccd video cameras and some rearmounted ccd video cameras.
4. the chromatograp defect automatic checkout system based on machine vision according to claim 1, it is characterised in that The display includes monitoring interface, process controller and alarm device with control system.
5. the chromatograp defect automatic checkout system based on machine vision according to claim 4, it is characterised in that The alarm device is alarm lamp.
6. the chromatograp defect automatic checkout system based on machine vision according to claim 4, it is characterised in that The process controller includes control knob, safe grating, keyboard and mouse drawer, sorter.
7. a kind of detection side of the chromatograp defect automatic checkout system based on machine vision as shown in claim 1-6 Method, it is characterised in that comprise the steps:
1)Standard picture is gathered by image capturing system, the standard picture for collecting is converted into into digital signal, it is accurate as differentiating Then;
2)Testing image is gathered by image capturing system, and that the testing image for collecting is converted into being subsequently can by computer Series of digital signals;
3)By image processing system by step 2)Digital signal and step 1)The middle digital signal as criterion is carried out With positioning, and defective in quality image is found out after calculation process using image processing method, and export judged result;
4)The judged result of image processing system is exported with control system by being shown.
8. the detection method of the chromatograp defect automatic checkout system based on machine vision according to claim 7, Characterized in that, described image processing method includes smooth and sharpening and the image side of grey level quantization, the binaryzation of image, image Detect on boundary.
9. the detection method of the chromatograp defect automatic checkout system based on machine vision according to claim 7, Characterized in that, the judged result includes the type of mistake and corresponding image information.
CN201611114674.XA 2016-12-07 2016-12-07 Chromatograp defect automatic checkout system and detection method based on machine vision Pending CN106556611A (en)

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Cited By (9)

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CN107817251A (en) * 2017-11-23 2018-03-20 苏州艺力鼎丰智能技术有限公司 A kind of carbon fiber surface of automobile part printed article defect intelligent detection equipment
CN107941823A (en) * 2017-11-23 2018-04-20 苏州艺力鼎丰智能技术有限公司 A kind of carbon fiber surface of automobile part prints volume defect intelligent detecting method
CN108621546A (en) * 2018-04-10 2018-10-09 王倩倩 A kind of intelligence control system of laminating machine
CN108982525A (en) * 2018-08-23 2018-12-11 云南省印刷技术研究所 A kind of analysis and detection method for books and periodicals green fine printing quality
CN109568751A (en) * 2019-01-16 2019-04-05 傅新镇 The in due course switching platform of instrument mode
CN109664611A (en) * 2018-12-12 2019-04-23 浙江新中商务印刷有限公司 A kind of printing machine
CN109738461A (en) * 2019-01-04 2019-05-10 安徽地势坤光电科技有限公司 A kind of halftone visible detection method applied in screen printing apparatus
CN109781741A (en) * 2019-01-17 2019-05-21 张家港永和包装印务有限公司 A kind of picture on surface detection method of printed matter
CN110335262A (en) * 2019-06-28 2019-10-15 西安理工大学 A kind of printed matter automatic defect classification method in machine vision

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CN202794011U (en) * 2012-09-29 2013-03-13 贵州贵航汽车零部件股份有限公司 Visual inspection device for printed matters
CN203337559U (en) * 2013-04-11 2013-12-11 湛江市鼎烽印业有限公司 Digitized full-automatic detection system for quality of presswork

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CN102565084A (en) * 2012-01-12 2012-07-11 北京印刷学院 Online inspection system and method for printed electronic product
CN202794011U (en) * 2012-09-29 2013-03-13 贵州贵航汽车零部件股份有限公司 Visual inspection device for printed matters
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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107817251A (en) * 2017-11-23 2018-03-20 苏州艺力鼎丰智能技术有限公司 A kind of carbon fiber surface of automobile part printed article defect intelligent detection equipment
CN107941823A (en) * 2017-11-23 2018-04-20 苏州艺力鼎丰智能技术有限公司 A kind of carbon fiber surface of automobile part prints volume defect intelligent detecting method
CN108621546A (en) * 2018-04-10 2018-10-09 王倩倩 A kind of intelligence control system of laminating machine
CN108982525A (en) * 2018-08-23 2018-12-11 云南省印刷技术研究所 A kind of analysis and detection method for books and periodicals green fine printing quality
CN109664611A (en) * 2018-12-12 2019-04-23 浙江新中商务印刷有限公司 A kind of printing machine
CN109738461A (en) * 2019-01-04 2019-05-10 安徽地势坤光电科技有限公司 A kind of halftone visible detection method applied in screen printing apparatus
CN109568751A (en) * 2019-01-16 2019-04-05 傅新镇 The in due course switching platform of instrument mode
CN109781741A (en) * 2019-01-17 2019-05-21 张家港永和包装印务有限公司 A kind of picture on surface detection method of printed matter
CN110335262A (en) * 2019-06-28 2019-10-15 西安理工大学 A kind of printed matter automatic defect classification method in machine vision

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