CN103679916B - Online imprinting detection method and system - Google Patents
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- CN103679916B CN103679916B CN201310460465.0A CN201310460465A CN103679916B CN 103679916 B CN103679916 B CN 103679916B CN 201310460465 A CN201310460465 A CN 201310460465A CN 103679916 B CN103679916 B CN 103679916B
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- 238000001514 detection method Methods 0.000 title claims abstract description 139
- 238000007639 printing Methods 0.000 claims abstract description 91
- 238000012545 processing Methods 0.000 claims abstract description 43
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- 238000000034 method Methods 0.000 claims abstract description 37
- 239000002699 waste material Substances 0.000 claims abstract description 23
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 37
- 238000011084 recovery Methods 0.000 claims description 26
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Abstract
The invention discloses an online imprinting detection method and system. The system employs multiple colorful CCD (Charge Coupled Device) cameras and multiple parallel high-speed image collecting, operating and processing systems to detect and timely monitor printing qualities, including the front-side number printing quality, the front-side fluorescent pattern printing quality, the front and back side nominal value printing quality and the watermarking pattern printing quality (inverted note defect detection), for large RMB note products which are printed online; and the detection system emits a related command and an acousto-optic alarm signal the moment that continuous wastes or severe wastes are detected, thereby controlling an imprinting machine to stop running. Operation interfaces of different detection functions are integrated in a terminal display with a big screen for concentrated display, wherein the interfaces are clear, and operation is convenient. Number printing is the last procedure for RMB note printing, the printing quality detection after number printing can be used to verify defects detected in the previous procedures and intercept products missed in detection, thereby ensuring the quality of delivered products, and improving the production efficiency.
Description
Technical field
The present invention relates to quality detection technology after a kind of code, refer in particular to a kind of imprinting online test method and system.
Background technology
Number printing is the last one procedure that RMB produces, and therefore, printing quality of generally checking numbers has very strict
Requirement.The number printing online detection instrument of printing industry early development adopts black-white CCD camera imaging, and its accuracy of detection is not
Height, and detect that function is incomplete.
Content of the invention
The technical problem to be solved in the present invention is：There is provided a kind of imprinting online test method and system, it adopts multiple stage color
Color CCD camera and multidiameter delay high-speed image sampling and arithmetic processing system, are arranged on ink recorder, the printing to print product
Defect carries out on-line real-time measuremen.
The technical solution of the present invention is：A kind of imprinting online test method, the method adopt multiple stage color camera and
Multidiameter delay high-speed image sampling and arithmetic processing system, the high-definition image that described color camera obtains is through digital picture
Collection and process, and comprehensive descision is carried out to the data after processing, detect the printing defects of this printed on line product, and sending out
Corresponding control command is sent, the method includes during existing printing defects：
Front number detection, carries out on-line checking and monitor in real time to the front number printing quality of printed on line product；
Front phosphor pattern detection, utilizes color camera to be imaged the front phosphor pattern of print product, and to printing quality
Amount carries out on-line checking and monitor in real time；
Nominal value print quality inspection, it is that the nominal value printing quality to print product carries out on-line checking and monitor in real time；
And
Watermark recovery detects, carries out on-line checking and monitor in real time to the watermark recovery quality of print product.
Imprinting online test method as above, wherein, described nominal value print quality inspection includes front nominal value detection
And at the detection of back side nominal value, and the detection of described front nominal value and the shared same group of CCD camera of front number detection and image acquisition
Reason system.
Imprinting online test method as above, wherein, described online test method is applied to M81 RMB ink recorder
On, real-time detection and monitoring are carried out to a RMB printed on line quality greatly.
Imprinting online test method as above, wherein, when detecting continuous waste product or serious waste product, sends at once
Related command harmony visual alarm, controls ink recorder out of service.
Imprinting online test method as above, wherein, number detection in described front docks wire size using coloured image
Sequence color is detected.
Imprinting online test method as above, wherein, described detection method also include image acquisition Synchronization Control with
And a product systems frame synchronization controls greatly, this image acquisition Synchronization Control is to be reached using the outer synchronous triggering signal of image acquisition
Require to the machine speed irrelevance of image acquisition and the image synchronization of each camera；This product systems frame synchronization control greatly is logical
Cross and a number greatly is counted, correspond between frame signal and big, realize system frame synchronization, will currently open greatly during process
The processing result image of product is tied in count value, makes this count value as the numbering of current information, and will be with identical volume
Number result be bound together, ultimately form the complete testing result currently opening greatly product.
A kind of imprinting on-line detecting system, wherein, described detecting system includes multiple detector units：Front number detection is single
Unit, front phosphor pattern detector unit, nominal value print quality inspection unit and watermark recovery detector unit, wherein：
Described front number detector unit, carries out on-line checking and reality to the front number printing quality of printed on line product
When monitoring；
Described front phosphor pattern detector unit, utilizes color camera to be imaged the front phosphor pattern of print product, and
On-line checking and monitor in real time are carried out to printing quality；
Described nominal value print quality inspection unit, it is that the nominal value printing quality to print product carries out on-line checking and reality
When monitoring；And
Described watermark recovery detector unit, for carrying out on-line checking and real-time supervising to the watermark recovery quality of print product
Control；
Each detector unit adopts multiple stage color camera and multidiameter delay high-speed image sampling and arithmetic processing system, described coloured silk
The high-definition image that form and aspect machine obtains is through digital image acquisition and process, and carries out comprehensive descision to the data after processing,
Detect the printing defects of this printed on line product, and send corresponding control command when finding printing defects, thus controlling print
Ink recorder is out of service.
Imprinting on-line detecting system as above, wherein, the printing defects that described front number detector unit is detected
Including wrong number, colour contamination, bite, broken line, stain, walk version, the one of which of knuckle or combination in any.
Imprinting on-line detecting system as above, wherein, described each detector unit includes light source, multiple stage CCD colour phase
Machine, image acquisition and processing module and synchronization control module, wherein, described multiple stage color camera is in described synchronization control module
The control of high-speed synchronous signal under, real time image collection and process are carried out to printed on line product, and pass through field stitching skill
Art realizes the detection of full width face.
Imprinting on-line detecting system as above, wherein, described front number detector unit includes light source, multiple stage CCD
Color camera, parallel image acquisition process work station, detection control work station, data storage server, wherein light source include by
One or more linear light sorurces of light-source controller controls, the high-definition image that described color camera obtains through corresponding simultaneously
Row image acquisition and processing work station is respectively completed digital image acquisition and the process of every camera, and by the data is activation after processing
Control work station to detection, control work station to carry out comprehensive descision to data by detection, detect the print of this printed on line product
Brush defect；Detection controls work station that data storage sends to data storage server and when finding printing defects corresponding control
Order.
Imprinting on-line detecting system as above, wherein, described front number detector unit also includes opening greatly number knowledge
Other module, described big number identification module is used for opening greatly the identification of the number greatly on the edge of trimming, is achieved in data base
Information association.
Imprinting on-line detecting system as above, wherein, described nominal value print quality inspection unit includes front nominal value
Detector unit and back side nominal value detector unit, wherein, described front nominal value detector unit and front number detector unit share same
One group of CCD color camera and image acquisition and processing module.
Imprinting on-line detecting system as above, wherein, described watermark recovery detector unit is that a RMB greatly is produced
In product, the watermark recovery of single K is detected, it includes a CCD color camera, and its light source is white light source, by high speed image
Collection and processing module, detect watermark touch the pillow, white watermark incompleteness printing defects, realize ticket re-selling incompleteness detection function.
Imprinting on-line detecting system as above, wherein, described detecting system also includes synchronous control unit, and this is synchronous
Control unit includes image acquisition lock unit and opens product systems frame synchronization unit greatly, and it adopts increment type rotary coding
Device, this code device signal introduces camera, as the outer synchronous triggering signal of camera image collection；This image acquisition Synchronization Control list
Unit using the outer synchronous triggering signal of image acquisition reach the image of the machine speed irrelevance of image acquisition and each camera with
Step requires；This product systems frame synchronization greatly controls for realizing multiple stage, the unification of multigroup camera quality information and binding.
Imprinting on-line detecting system as above, wherein, described image collection lock unit includes the rotation of this increment type
Encoder and synchronizing signal controller, the output signal of synchronizing signal controller is connected with capture card, eventually enters into camera.
Imprinting on-line detecting system as above, wherein, described big product systems frame synchronization unit includes this increment
Formula rotary encoder and system-frame isochronous controller, this system-frame isochronous controller is coupled with processing module with described image, leads to
Cross and encoder frames signal is carried out with accumulated counts obtain count value, image variants unit is currently opened greatly the image of product
Result is tied to this numerically, makes this numerical value as the numbering of current information, and all process with identical numbering
Result is bound together, and ultimately forms the complete testing result currently opening greatly product.
Imprinting on-line detecting system as above, wherein, this detecting system also includes PLC and shuts down control module and acousto-optic
Alarm module, when detecting the printing defects that work station detects product, shuts down control module to imprinting machine controller by PLC
Send halt command, and sound and light alarm signal is sent by sound and light alarm module, at once intercept printed on line or the leakage of front end operation
The faulty goods of inspection.
Imprinting on-line detecting system as above, wherein, described front number detector unit is arranged on imprinting detection case
Interior, the ink recorder that the casing of described imprinting detection case is fixed on by imprinting mounting bracket below imprinting machine testing cylinder serves as a contrast shelves
On；Described front phosphor pattern detector unit and watermark recovery detector unit are arranged in fluoroscopic examination case, described fluoroscopic examination
The box assembly of case is fixed on ink recorder by fluorescence mounting bracket and serves as a contrast shelves opposite side, and is located under described imprinting machine testing cylinder
Side；Overleaf in nominal value detection case, described back side nominal value detection case is arranged on described print to the nominal value detector unit installation of the described back side
Below the defeated paper sprocket wheel of ink recorder.
Imprinting on-line detecting system as above, wherein, described back side nominal value detection case is by casing mounting assembly
It is arranged on the imprinting machine base below defeated paper sprocket wheel；It is provided with air draught on the imprinting chain road of corresponding back side nominal value detection case
Plate, along the elongated collection groove being axially arranged with for collected by camera of defeated paper sprocket wheel on airdraft plate；Described airdraft plate utilizes airdraft plate
Mounting assembly is fixed；The plane of airdraft plate is parallel with the chain road of ink recorder, and the camera calibration line in the nominal value detection case of the back side with
The plane of airdraft plate is vertical.
Imprinting on-line detecting system as above, wherein, described casing mounting assembly includes casing connecting seat and casing
Base, described box assembly is to be fixed together with casing connecting seat, cabinet base with screw, is then fitted into imprinting machine base
On；And airdraft plate is to be drawn using ink recorder first pulling shaft existing on airdraft plate mounting assembly and ink recorder and ink recorder second
Axle is fixed, and this airdraft plate mounting assembly includes first seizing, the first mounting bracket, second seize and the second mounting bracket,
First is seized, second seize be separately fixed at ink recorder first pulling shaft, on the second pulling shaft, by the first mounting bracket, second
Airdraft plate is fixed by mounting bracket.
Imprinting on-line detecting system as above, wherein, described front number detector unit adopts five colored CCD phases
Machine and five sets of corresponding parallel image acquisition process work stations, realize the detection of full width face by field stitching technology；Described five
Colorful CCD camera is transversely arranged to be arranged in the imprinting detection case that visual field can be registering, and CCD camera pixel resolution reaches 0.08mm
× 0.08mm/pixel, described imprinting detection case is arranged on above imprinting machine cylinder, under high-speed synchronous signal controls, to breadth
For 800mm × 600mm, print speed printing speed is that the RMB of 7000/hour is opened greatly product and carried out real time image collection and process；Institute
Stating front phosphor pattern detector unit adopts 5 colorful CCD cameras transversely arranged, is arranged on the fluoroscopic examination case that visual field can be registering
Interior, detection breadth is 800mm × 600mm, and every CCD camera pixel resolution reaches 0.1mm × 0.1mm/pixel, colored high
Resolution phosphor pattern detects to expand defects detection species, can detect that phosphor pattern walks version, fluorescence intensity deviation, fluorogram
Case incomplete and 10 millimeters in the range of phosphor pattern set-off number of drawbacks；Described back side nominal value detector unit is to the back side after imprinting
Nominal value printing carries out full width face high resolution detection, and the pixel resolution of every CCD camera reaches 0.11mm × 0.14mm/
pixel.
Imprinting four-in-one online test method of the present invention and system, preferably include front number printing quality, front fluorescence
Pattern printing quality, front nominal value printing quality, back side nominal value printing quality and watermark recovery（Ticket re-selling defects detection）Deng many
Plant print quality inspection and monitor in real time, intercept continuous waste product and serious waste product in time and imitate with producing it is ensured that dispatching from the factory product quality
Rate.
The present invention can improve on-line checking precision and increase detection function, at once discovery printed on line product defects and front
The product of end operation missing inspection, is intercepted to continuous waste product and serious waste product by running to control, thus reach guaranteeing the product that dispatches from the factory
Quality and the purpose improving conforming product rate.
The imprinting on-line detecting system of the present invention adopts colorful CCD camera and high-speed image sampling and arithmetic processing system group
Become machine vision on-line measuring device, may be mounted on M81 ink recorder, RMB imprinting product is carried out real-time detection and
Monitoring, tested big product breadth is 800mm × 600mm, and print speed printing speed is 7000/hour.Detection includes front number printer
Brush quality, front phosphor pattern printing quality, front and back nominal value printing quality and watermark recovery（Ticket re-selling defects detection）Deng
Multiple print quality inspection and monitor in real time, when finding continuous waste product and serious waste product, send halt command and acousto-optic in time
Alarm signal, at once intercepts the faulty goods of printed on line or front end operation missing inspection it is ensured that product quality, improves printing automation
Level.
Brief description
Fig. 1 is the structural framing schematic diagram of the detecting system of a specific embodiment of the present invention.
Figure 1A is the operation principle schematic diagram of the detecting system of a specific embodiment of the present invention.
The front number detector unit block diagram that Fig. 2 is adopted by a specific embodiment of the present invention.
Fig. 3 is the phosphor pattern with background.
The back side nominal value detector unit computer disposal block diagram that Fig. 4 is adopted by a specific embodiment of the present invention.
Fig. 5 constitutes block diagram for image acquisition synchronization system in a specific embodiment of the present invention.
Fig. 6 constitutes block diagram for a product systems frame synchronization greatly in a specific embodiment of the present invention
Fig. 7 A is phosphor pattern detection case scheme of installation in a specific embodiment of the present invention.
Fig. 7 B is imprinting detection case scheme of installation in a specific embodiment of the present invention.
Fig. 7 C is back side nominal value detection case scheme of installation in a specific embodiment of the present invention.
Specific embodiment
The present invention proposes a kind of imprinting online test method, and the method includes front number detection, using multiple stage colour phase
Machine and multidiameter delay high-speed image sampling and arithmetic processing system, the high-definition image that described color camera obtains is through numeral
Image acquisition and process, and comprehensive descision is carried out to the data after processing, detect the printing defects of this printed on line product, and
Send corresponding control command when finding printing defects, thus carrying out online to the front number printing quality of printed on line product
Detection and monitor in real time.Additionally, the present invention also proposes a kind of imprinting on-line detecting system, described detecting system includes more than one
Detector unit, such as front number detector unit, its be using multiple stage color camera and multidiameter delay high-speed image sampling and
Arithmetic processing system, carries out on-line checking and monitor in real time to the front number printing quality of print product.
It is preferred that methods described or system also include：
Front phosphor pattern detection, utilizes color camera to be imaged the front phosphor pattern of print product, and to printing quality
Amount carries out on-line checking and monitor in real time；
Front nominal value detection, it is that the front nominal value printing quality to print product carries out on-line checking and monitor in real time；
Back side nominal value detection, carries out on-line checking and monitor in real time with the back side nominal value printing quality to print product；With
And
Watermark recovery detects, carries out on-line checking and monitor in real time with the watermark recovery quality to print product.
In conjunction with shown in Fig. 1, Figure 1A, the method for the present invention and system adopt multiple stage colorful CCD camera and multidiameter delay high
Fast image acquisition and arithmetic processing system, carry out front number printing quality, front to a RMB product greatly for printed on line
Phosphor pattern printing quality, front and back nominal value printing quality and watermark recovery（Ticket re-selling defects detection）Etc. multiple printing qualities
Amount detection and monitor in real time, when detecting continuous waste product or serious waste product, detecting system sends related command and acousto-optic at once
Alarm signal, controls ink recorder out of service.Various detection feature operation interfaces can be integrated in a giant-screen terminal and show
Centralized displaying on device, interface is clear, easy to operate.Number printing is the last one procedure of RMB printing, printing quality after code
Amount detection can be verified to the defect that front end operation detects and be intercepted missing inspection product it is ensured that product quality of dispatching from the factory, and improve life
Produce efficiency.
Cooperation drawings and the specific embodiments are described in further detail to the specific embodiment of the present invention below.
In one specific embodiment of imprinting online test method of the present invention and system, detecting system adopts colored CCD machine
Visual system, by polyphaser field of view (fov) registration detection case, lighting source, Collecting Pattern and the group such as processing unit, synchronous control unit
Become, the detector unit of difference in functionality can be arranged on the different test positions of ink recorder, carry out such as front number using detection case
Code printing quality, front phosphor pattern printing quality, front and back nominal value printing quality, watermark recovery（Ticket re-selling defects detection）
Etc. the dynamic detection of multiple print characteristics defects, printed on line product is carried out with quality control, Figure 1A is detection method
And the operation principle schematic diagram of a specific embodiment of system.
In the present embodiment, front number detector unit includes detection and controls work station, data storage server, light source, coloured silk
Form and aspect machine and corresponding parallel image acquisition process work station, wherein, the high-definition image that described color camera obtains passes through
Corresponding image acquisition and processing work station is respectively completed digital image acquisition and the process of every camera, and by the data after processing
It is sent to detection and controls work station, control work station to carry out comprehensive descision to data by detection, detect this printed on line product
Printing defects；Detection controls work station to send corresponding by data storage to data storage server and when finding printing defects
Control command, such as PLC control shuts down, or sound and light alarm.
In conjunction with above and knowable to Figure 1A, Fig. 2, in the present invention, each detector unit can be using similar to aforementioned front number
The structure of detector unit, to realize, controls work including light source, multiple stage color camera, parallel image acquisition process work station, detection
Stand, the ingredient such as data storage server.
In one preferred embodiment of the present invention, this nominal value print quality inspection unit includes full wafer nominal value detector unit and the back of the body
Face nominal value detector unit is it is preferable that front nominal value detector unit and above-mentioned front number detector unit share same group of colored CCD
Camera data acquisition processing system, this optimizes and combines and enormously simplify overall structure, saves installing space, realizes utilizing
One detector unit completes the detection of two kinds of functions simultaneously, gives full play to the potentiality of machine vision resource on-line checking.
Fig. 2 is the block diagram of the front number detector unit in a specific embodiment of the present invention.High-speed image sampling and place
Reason work station is the core of detecting system, as illustrated, front number detector unit adopts 5 sets of parallel image acquisition process work
Stand, be respectively completed digital image acquisition and the process of every colorful CCD camera, by parallel processing and optimized algorithm, in 160 millis
Collection and the calculation process of high volume data stream is completed at a high speed in the time of second.Data after treatment is sent out by gigabit Ethernet
Deliver to detection work station, comprehensive descision is carried out to these detection datas by detection work station, detects the mistake of front number printing
Number, colour contamination, bite, broken line, stain, walk the printing defects such as version, knuckle.Detection controls work station to carry out data storage and send phase
Answer control command, when continuous waste product and serious waste product occur, send sound and light alarm signal, sent out to printer by PLC simultaneously
Go out halt command（Detection in Fig. 2 and Fig. 4 controls the work station that work station preferably shares）, at once intercept printed on line or front
The faulty goods of end operation missing inspection.In Fig. 2, light source control module is mainly used in controlling light source igniting, CCD camera power supply mould
Whether block is mainly used in controlling the power supply of camera, and a number identification module is the knowledge for the number greatly on a trimming edge greatly greatly
Not, for the information association in data base.
Stable, uniform, wide spectral range light source is the reliable guarantee that CCD camera obtains high signal-to-noise ratio image, the present invention
There is provided the transverse illumination of examined product using linear LED light source, the heterogeneity of this light source is less than 5%, and stability is 0.3%.Light
The spectral region of source covering 480-700 nanometer, the continuously adjustable linear LED light source of illumination, linear light sources 1 and linear light sources 2 are right
Claim to be arranged in imprinting detection case, transverse illumination imaging area is it is ensured that CCD camera obtains high-definition image.
The detection of imprinting colour contamination defect is not available for the black-white CCD camera detection that early stage printing industry adopts,
The color CCD image detection of the present invention not only substantially increases accuracy of detection, and increased the detection of butted line number colour contamination
Ability.
In one specific embodiment of the present invention, this front number detector unit adopts five colorful CCD cameras to pass through visual field
Splicing realizes the detection of full width face.5 colorful CCD cameras are transversely arranged be arranged on visual field can be in the detection case of registration, CCD phase
Machine pixel resolution reaches 0.08mm × 0.08mm/pixel.High-speed synchronous signal control under, to breadth for 800mm ×
600mm, print speed printing speed is that the RMB of 7000/hour is opened greatly product and carried out real time image collection and process.
In the present embodiment, front phosphor pattern detector unit can also be transversely arranged using 5 colorful CCD cameras, installs
Can be in the fluoroscopic examination case of registration in visual field, detection breadth is 800mm × 600mm, and every CCD camera pixel resolution reaches
0.1mm × 0.1mm/pixel, the detection of high-resolution phosphor pattern expands defects detection species, can detect fluorogram
Case walks the number of drawbacks such as phosphor pattern set-off in the range of version, fluorescence intensity deviation, phosphor pattern incompleteness and 10 millimeters, and this is former
Black and white phosphor pattern defects detection is had to be beyond one's reach.Phosphor pattern belongs to burst of ultraviolel imaging, the target collection of the present embodiment
Area's ultra violet illumination adopts ultraviolet LED light source and white LED light source combination lighting, phosphor pattern combination lighting light source is arranged on close
In the fluoroscopic examination case closing.Ultraviolet light that the present embodiment is adopted and white light combination illuminate this optimization design it can be ensured that glimmering
Light pattern image quality.Fig. 3 is that phosphor pattern detector unit collects the phosphor pattern with background.
Watermark recovery detector unit only detects to the watermark recovery of single K in a RMB product greatly, using a CCD
Camera and white-light illuminating, by high-speed image sampling and processing system, detect that watermark is touched the pillow, the printing such as white watermark incompleteness lacks
Fall into, realize ticket re-selling detection function.The CCD camera of watermark recovery detector unit and white light source are arranged on aforementioned fluorescent detection case
Interior, by isolating subregion light structures, realize the testing goal that same detection case completes two kinds of difference in functionalitys, this optimum organization
Structure simplifies population structure, saves installing space.
Back side nominal value detector unit is that back side nominal value printing defects after imprinting are detected, preceding working procedure is produced simultaneously
Faulty goods verified and rechecked, detection breadth is 800mm × 600mm, as shown in figure 4, its be the detection of back side nominal value singly
The system of unit processes block diagram.Back side nominal value detector unit adopts 4 colorful CCD cameras, is carried out online by field stitching technology
Detection, the pixel resolution of every CCD camera reaches 0.11mm × 0.14mm/pixel.Lighting source is using having convergence optics
The high-brightness LED line style light source 1,2 of structure, four CCD camera and LED light source are installed overleaf in nominal value detection case, back side ticket
Face detection case may be mounted at below M81 ink recorder defeated paper sprocket wheel, and detection target is opened greatly product paper and is located on defeated paper sprocket wheel.The back side
Nominal value detects that box body is located at the lower section of defeated paper sprocket wheel, and it is fixed on imprinting machine base, real to carry out back side nominal value quality
When detection.The present embodiment adopts two sets of image acquisition and processing work stations that print product back side nominal value image real-time acquisition is processed,
Detect the obvious or serious nominal value printing defects such as the offset printing of the front-end product back side, gravure through high-speed computation analysis and judgement, lead to
Cross data storage by the data storage of testing result, control work station to send corresponding control instruction by detection simultaneously.Work as inspection
When measuring waste product or serious waste product, control work station will at once send halt instruction harmony visual alarm, control ink recorder to stop
Only run, intercept the waste product that preceding working procedure produces in time.CCD camera energy supply control module in Fig. 4 is for controlling camera
Whether power, light source control module is mainly used in controlling light source igniting.It is preferred that data storage server herein, detection are controlled
Work station processed is to control work station to share with the data storage server of the front number detector unit in Fig. 2, detection.
As shown in Fig. 1, Fig. 5, Fig. 6, in one embodiment of the invention, the synchronous control unit of this detecting system includes image
Collection lock unit and greatly a product systems frame synchronization unit.
Synchronous control unit includes the incremental rotary encoder installed on money press, and the resolution of encoder is according to being
System resolution determines, typically adopts 2000 6000lines/r.Code device signal is introduced camera, as camera image collection
Outer synchronous triggering signal, so, it is ensured that no matter machine speed speed, can obtain that resolution is uniform, correct image, reach figure
Machine speed irrelevance as collection.
Additionally, in the present embodiment, synchronizing signal controller preferably adopts signal branch controller, using this signal branch control
Device processed carries out Branch control to code device signal, makes a road signal be changed into the signal that multichannel has identical temporal aspect.Signal divides
The output signal propping up controller is connected with capture card, eventually enters into camera, refer to shown in Fig. 5.Due to entering the outer same of camera
Step signal be homology, thus can accomplish that the image acquisition of each camera starts simultaneously at and terminates, with ensure each camera it
Between image consistent, thus the image synchronization meeting multiple stage camera requires.
The core of above-mentioned synchronizing signal controller is the signal processing unit based on digital circuit.This controller receives
The balanced differential signal (RS422 signal) of encoder, afterwards, this differential signal is converted to non-equilibrium TTL single-ended signal, through number
After word isolation processing, it is again converted to low-pressure balance differential signal (LVDS signal), for the image acquisition Synchronization Control of camera.
Preferably electrical isolation measure is taken to input signal and output signal in above-mentioned conversion, to meet industry spot evil
The reliability and stability of bad electrical Interference environment hypograph Synchronization Control.
Meanwhile, in order to meet the demand to Multi-path synchronous signal for the multicamera system, such as Ke Jiang mono- tunnel in isochronous controller
RS422 signal is converted to four road LVDS signals.Therefore, every isochronous controller can control the collection Synchronization Control of 4 cameras,
But not limited to this.
In addition, this controller is also equipped with signal cascade function, remaining and inputting from what the cascade port of controller exported
Signal amplitude and phase place identical RS422 signal, therefore the output signal of cascade port can be used as second isochronous controller
Input signal.So, multiple stage isochronous controller cascade uses, and just constitutes perfect polyphaser, the image detecting station more
Collection synchronous control system.
In the machine vision real-time detecting system of banknote printing, in most cases will be using industrial (linear array) phase
Machine enters line Scanning Detction to the product after printing, thus constitutes the complete image of a width.The image acquisition of camera needs to trigger
Signal, possesses this trigger inside capture card.The edge that rises or falls of this signal makes CCD or cmos image sensor exposure,
Can get the image of current collection afterwards.In the case of paper speed of service uniform and stable, aforesaid way can be managed
The image thought.But printing machine speed change or or machine speed unstable in the case of, image resolution ratio will be greatly affected, and cause
Image stretch or compression, finally cannot use.And after employing the such scheme of the present invention, reached the machine of image acquisition simultaneously
The image synchronization of fast irrelevance and each camera requires；And, for a greatly product, due to the multiple stage camera of the present invention
Image has identical original position and identical resolution, and therefore, this detecting system easily can utilize multiple cameras simultaneously
Product is taken pictures, to meet the requirement of whole breadth detection.
In the present embodiment, it is by the use of existing embedded computer as system-frame isochronous controller, a number greatly is entered
Row counts, thus realizing system frame synchronization.Due to being one-to-one between encoder frames signal and big, therefore above-mentioned counting
Obtained by accumulated counts are carried out to encoder frames signal.Therefore, each product in press all can have a unique meter
Numerical value is corresponding with this product.By this count value, by serial ports, machine sends to image acquisition and processing embedded computer in due course
Work station (IPU) and detection control work station (ICW), after IPU obtains this numerical value, are currently opened greatly the processing result image of product
It is tied to this numerically, make this numerical value as the numbering of current information.Current results are passed through Ethernet by each afterwards IPU
Send to ICW, ICW is bound together all each IPU results with identical numbering, ultimately form currently big product
The complete testing result of product, incorporated by reference to shown in Fig. 6.This way it is possible to realize multiple stage, the unification of multigroup camera quality information and
Binding, avoid the binding Problem-Error of processing result image to greatest extent it is ensured that on-line detecting system reliable, steady
Fixed operation.
Because the present invention has These characteristics and advantage, therefore, it is highly suitable to be applied for printing quality and require high print
Paper money field, is especially suitable for being applied to the imprinting detection of RMB.With reference to the present invention a concrete application example to this
Bright it is described in further detail.
The present invention is that the imprinting four-in-one on-line detecting system in above-described embodiment is arranged on M81 new RMB imprinting
On machine, real-time detection and monitoring are carried out to a RMB printed on line quality greatly.Each detector unit can be arranged on as needed
Different test positions on ink recorder, wherein imprinting detect that box assembly 10 is arranged on a diameter of 300 millimeters of imprinting machine testing cylinder
100 side-lower（As shown in Figure 7 A）；Fluoroscopic examination box assembly 20 is arranged on the lower section of above-mentioned same cylinder 100（As Fig. 7 B institute
Show）；Back side nominal value detection case 30 is arranged on ink recorder defeated paper sprocket wheel（As seen in figure 7 c）.For M81 ink recorder, can be direct
Using its impression cylinder as aforementioned detection cylinder, that is, imprinting detection box assembly 10 is preferably mounted under the side of impression cylinder
Side.
Specifically, each detector unit of the present invention is arranged on ink recorder different test positions, wherein imprinting detection case group
Part 10 is fixed on, by imprinting mounting bracket 11, the side top position that ink recorder serves as a contrast shelves 101, and in the present embodiment, front number detects
The CCD camera detection line of unit is 67 degree with the angle of the vertical true line of cylinders of printing press（Not limited to this）, camera calibration line passes through
The corresponding cylinder axis of ink recorder（As shown in Figure 7 A）.
Fluoroscopic examination box assembly 20 is fixed on the opposite side that printer serves as a contrast shelves 101, this enforcement by fluorescence mounting bracket 21
In example, corresponding fluorescence camera detection line is preferably 16 degree with the angle of the cross section of cylinders of printing press, and fluorescence camera detection
Line passes through the axle center of ink recorder diameter 300mm cylinder（As shown in Figure 7 B）.
The detection target of back side nominal value detection case is on defeated paper sprocket wheel 200, and therefore, its needs sets on imprinting chain road
Put airdraft plate 39, along the elongated collection groove being axially arranged with for collected by camera of defeated paper sprocket wheel on airdraft plate 39, in order to camera
The image of a product greatly of collection airdraft plate opposite side.Mounting assembly includes casing mounting assembly and airdraft plate mounting assembly, its
Box assembly 30 is first fixed together with casing connecting seat 32, cabinet base 31 with screw, is then fitted into imprinting machine base 201
On；And airdraft plate 39 is to be fixed on existing ink recorder the first pulling shaft 35 and ink recorder on ink recorder using airdraft plate mounting assembly
On second pulling shaft 36, thus realizing the fixation of airdraft plate 39, this airdraft plate mounting assembly includes first and seizes the 33, first installation
Frame 37, second seize 34 and second mounting bracket 38, first is seized 33, second seize 34 and be separately fixed at ink recorder first and draw
On axle 35, the second pulling shaft 36, by the first mounting bracket 37, the second mounting bracket 38, airdraft plate 39 is fixing, airdraft plate 39 is relatively
Good is parallel with the chain road of ink recorder, and camera calibration line is vertical with the plane of airdraft plate 39（As seen in figure 7 c）.The present embodiment
In, corresponding camera calibration line is preferably 42 degree with the angle of horizontal plane.
In the above-mentioned Application Example of the present invention, the CCD camera in each detection case runs synchronizing signal control in ink recorder
Under system to print speed printing speed be the greatly RMB product that 7000/hour, breadth are 800mm × 600mm carry out image acquisition and
Real-time processing, complete front number printing quality, front phosphor pattern printing quality, front and back nominal value printing quality and
Watermark recovery（Ticket re-selling defects detection）Etc. multiple print quality inspection and monitor in real time, when detecting continuous waste product or serious waste product
When, detecting system sends related command harmony visual alarm at once, controls ink recorder out of service, at once intercepts waste product or tight
Weight waste product is it is ensured that product quality of dispatching from the factory.Various detection feature operation interfaces are integrated in concentrates on a giant-screen terminal display
Display, interface is clear, easy to operate.
Although the present invention is disclosed with specific embodiment, it is not limited to the present invention, the technology of any this area
Personnel, the displacement of done equivalent assemblies on the premise of without departing from the spirit and scope of the present invention, or according to patent of the present invention
Equivalent variations and modification that protection domain is made, all should still belong to the category that this patent is covered.
Claims (19)
1. a kind of imprinting online test method is it is characterised in that the method adopts multiple stage CCD color camera and multidiameter delay at a high speed
Image acquisition and arithmetic processing system, the high-definition image that described CCD color camera obtains is through digital image acquisition and place
Reason, and comprehensive descision is carried out to the data after processing, detect the printing defects of printed on line product, and find printing defects
When send corresponding control command, the method includes：
Front number detection, carries out on-line checking and monitor in real time to the front number printing quality of printed on line product；
Front phosphor pattern detection, utilizes CCD color camera to be imaged the front phosphor pattern of print product, and to printing quality
Carry out on-line checking and monitor in real time；
Nominal value print quality inspection, it is that the nominal value printing quality to print product carries out on-line checking and monitor in real time；And
Watermark recovery detects, carries out on-line checking and monitor in real time to the watermark recovery quality of print product；
Described detection method also includes image acquisition Synchronization Control and a product systems frame synchronization greatly controls, and this image acquisition is same
It is to reach the machine speed irrelevance of image acquisition and each CCD colour using the outer synchronous triggering signal of image acquisition that step controls
The image synchronization of camera requires；Greatly product systems frame synchronization controls is by counting to a number greatly for this, frame signal and
Correspond between big, realize system frame synchronization, the processing result image currently being opened greatly product during process is tied to counting
In value, make this count value as the numbering of current information, and the result with identical numbering is bound together, end form
Become currently to open greatly the complete testing result of product.
2. imprinting online test method as claimed in claim 1 is it is characterised in that described nominal value print quality inspection is just included
Face nominal value detection and the detection of back side nominal value, and nominal value detection in described front shares same group of CCD colour phase with the detection of front number
Machine and image collection processing system.
3. imprinting online test method as claimed in claim 1 is it is characterised in that described online test method is applied to M81
On RMB ink recorder, real-time detection and monitoring are carried out to a RMB printed on line quality greatly.
4. imprinting online test method as claimed in claim 1 detects continuous waste product or serious waste product it is characterised in that working as
When, at once send related command harmony visual alarm, control ink recorder out of service.
5. imprinting online test method as claimed in claim 1 is it is characterised in that number detection in described front utilizes cromogram
As butted line number colour contamination is detected.
6. a kind of imprinting on-line detecting system is it is characterised in that described detecting system includes multiple detector units：Front number inspection
Survey unit, front phosphor pattern detector unit, nominal value print quality inspection unit and watermark recovery detector unit, wherein：
Described front number detector unit, carries out on-line checking and real-time prison to the front number printing quality of printed on line product
Control；
Described front phosphor pattern detector unit, utilizes CCD color camera to be imaged the front phosphor pattern of print product, and right
Printing quality carries out on-line checking and monitor in real time；
Described nominal value print quality inspection unit, it is that the nominal value printing quality to print product carries out on-line checking and real-time prison
Control；And
Described watermark recovery detector unit, for carrying out on-line checking and monitor in real time to the watermark recovery quality of print product；
Each detector unit adopts multiple stage CCD color camera and multidiameter delay high-speed image sampling and arithmetic processing system, described CCD
The high-definition image that color camera obtains is through digital image acquisition and process, and the data after processing is carried out comprehensively sentencing
Disconnected, detect the printing defects of this printed on line product, and send corresponding control command when finding printing defects, thus controlling
Ink recorder is out of service；
Described detecting system also includes synchronous control unit, and this synchronous control unit includes image acquisition lock unit and big
Product systems frame synchronization unit, it adopts incremental rotary encoder, and this code device signal introduces CCD color camera, as CCD
The outer synchronous triggering signal of color camera image collection；This image acquisition lock unit utilizes the outer synchronous triggering letter of image acquisition
Number require reaching the image synchronization of the machine speed irrelevance of image acquisition and each CCD color camera；This opens greatly product systems
Frame synchronization unit is used for realizing multiple stage, the unification of multigroup CCD color camera quality information and binding.
7. imprinting on-line detecting system as claimed in claim 6 is it is characterised in that described front number detector unit is detected
Printing defects include wrong number, colour contamination, bite, broken line, stain, walk version, the one of which of knuckle or combination in any.
8. imprinting on-line detecting system as claimed in claim 6 is it is characterised in that described each detector unit includes light source, many
Platform CCD color camera, image acquisition and processing module and synchronization control module, wherein, described multiple stage CCD color camera is in institute
State under the control of high-speed synchronous signal of synchronization control module, real time image collection and process are carried out to printed on line product, and
The detection of full width face is realized by field stitching technology.
9. imprinting on-line detecting system as claimed in claim 8 is it is characterised in that described front number detector unit includes light
Source, multiple stage CCD color camera, parallel image acquisition process work station, detection control work station, data storage server, wherein
Light source includes the fine definition figure being obtained by one or more linear light sorurces of light-source controller controls, described CCD color camera
As being respectively completed digital image acquisition and the place of every CCD color camera through corresponding parallel image acquisition process work station
Reason, and the data is activation after processing is controlled work station to detection, control work station to carry out comprehensive descision to data by detection, inspection
Measure the printing defects of this printed on line product；Detection controls work station to data storage server and finding data storage
Corresponding control command is sent during printing defects.
10. imprinting on-line detecting system as claimed in claim 9 is it is characterised in that described front number detector unit also wraps
Include a number identification module greatly, described big number identification module is used for opening greatly the identification of the number greatly on the edge of trimming, thus
Realize the information association in data base.
11. imprinting on-line detecting systems as claimed in claim 8 are it is characterised in that described nominal value print quality inspection unit
Including front nominal value detector unit and back side nominal value detector unit, wherein, described front nominal value detector unit is examined with front number
Survey same group of CCD color camera of units shared and image acquisition and processing module.
12. imprinting on-line detecting systems as claimed in claim 11 are it is characterised in that described watermark recovery detector unit is right
In a RMB product, the watermark recovery of single K is detected, it includes a CCD color camera greatly, and its light source is white light source,
By high-speed image sampling and processing module, detect watermark touch the pillow, white watermark incompleteness printing defects, realize the incomplete detection of ticket re-selling
Function.
13. imprinting on-line detecting systems as claimed in claim 6 are it is characterised in that described image collection lock unit includes
This incremental rotary encoder and synchronizing signal controller, the output signal of synchronizing signal controller is connected with capture card, finally
Enter CCD color camera.
14. imprinting on-line detecting systems as claimed in claim 13 are it is characterised in that described big product systems frame synchronization list
Unit includes this incremental rotary encoder and system-frame isochronous controller, this system-frame isochronous controller and image and processing module
Couple, obtain count value by encoder frames signal is carried out with accumulated counts, image variants unit currently will open greatly product
The processing result image of product is tied in this count value, makes this count value as the numbering of current information, and all with phase
Result with numbering is bound together, and ultimately forms the complete testing result currently opening greatly product.
The 15. imprinting on-line detecting systems as described in any one of claim 6～14 are it is characterised in that this detecting system is also wrapped
Include PLC and shut down control module and sound and light alarm module, when detecting the printing defects that work station detects product, stopped by PLC
Machine control module sends halt command to imprinting machine controller, and sends sound and light alarm signal by sound and light alarm module, at once
Intercept the faulty goods of printed on line or front end operation missing inspection.
16. imprinting on-line detecting systems as claimed in claim 11 are it is characterised in that described front number detector unit is installed
In imprinting detection case, the casing of described imprinting detection case is fixed on below imprinting machine testing cylinder by imprinting mounting bracket
On ink recorder lining shelves；Described front phosphor pattern detector unit and watermark recovery detector unit are arranged in fluoroscopic examination case, institute
The box assembly stating fluoroscopic examination case is fixed on ink recorder lining shelves opposite side by fluorescence mounting bracket, and is located at described ink recorder
Below detection cylinder；The nominal value detector unit installation of the described back side overleaf in nominal value detection case, pacify by described back side nominal value detection case
It is contained in below the defeated paper sprocket wheel of described ink recorder.
17. imprinting on-line detecting systems as claimed in claim 16 are it is characterised in that described back side nominal value detection case is to pass through
Casing mounting assembly is arranged on the imprinting machine base below defeated paper sprocket wheel；On the imprinting chain road of corresponding back side nominal value detection case
It is provided with airdraft plate, along the elongated collection groove being axially arranged with for the collection of CCD color camera of defeated paper sprocket wheel on airdraft plate；Described
Airdraft plate is fixed using airdraft plate mounting assembly；The plane of airdraft plate is parallel with the chain road of ink recorder, and back side nominal value detection case
Interior CCD color camera detection line is vertical with the plane of airdraft plate.
18. imprinting on-line detecting systems as claimed in claim 17 are it is characterised in that described casing mounting assembly includes casing
Connecting seat and cabinet base, the box assembly of described casing mounting assembly is to be fixed with casing connecting seat, cabinet base with screw
Together, it is then fitted on imprinting machine base；And airdraft plate is using existing on airdraft plate mounting assembly and ink recorder
Ink recorder first pulling shaft and ink recorder second pulling shaft are fixed, and this airdraft plate mounting assembly includes first seizing, the first installation
Support, second seize and the second mounting bracket, first is seized, second seize be separately fixed at ink recorder first pulling shaft, second
On pulling shaft, by the first mounting bracket, the second mounting bracket, airdraft plate is fixed.
19. imprinting on-line detecting systems as claimed in claim 11 are it is characterised in that described front number detector unit adopts
Five CCD color cameras and five sets of corresponding parallel image acquisition process work stations, realize full width face by field stitching technology
Detection；Described five CCD color cameras are transversely arranged to be arranged in the imprinting detection case that visual field can be registering, CCD color camera picture
First resolution reaches 0.08mm × 0.08mm/pixel, and described imprinting detection case is arranged on above imprinting machine cylinder, same at a high speed
Under step signal controls, it is 800mm × 600mm to breadth, print speed printing speed is that the RMB of 7000/hour is opened greatly product and carried out reality
When image acquisition and process；Described front phosphor pattern detector unit adopts 5 CCD color cameras transversely arranged, is arranged on and regards
In the fluoroscopic examination case that field can be registering, detection breadth is 800mm × 600mm, and every CCD color camera pixel resolution reaches
0.1mm × 0.1mm/pixel, high-resolution phosphor pattern detects to expand defects detection species, can detect fluorogram
Case walks phosphor pattern set-off number of drawbacks in the range of version, fluorescence intensity deviation, phosphor pattern incompleteness and 10 millimeters；The described back side
Nominal value detector unit is to carry out full width face high resolution detection, the picture of every CCD color camera to nominal value printing in the back side after imprinting
First resolution reaches 0.11mm × 0.14mm/pixel.
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| CN104015478A (en) * | 2014-05-13 | 2014-09-03 | 南昌印钞有限公司 | Inverted banknote detection device used for banknote printing machine |
| CN104149488A (en) * | 2014-08-08 | 2014-11-19 | 林小博 | Printing quality visual inspection system |
| CN105818443B (en) * | 2015-01-06 | 2019-01-25 | 征图新视（江苏）科技有限公司 | Box gluing machine reverse side increase checking system |
| CN104999816A (en) * | 2015-08-11 | 2015-10-28 | 安徽远鸿机械自动化有限公司 | Detection method for packaging bag printing |
| CN105139515B (en) * | 2015-08-20 | 2018-01-12 | 上海古鳌电子科技股份有限公司 | A kind of bank note classification identification device and its recognition methods |
| CN106626811A (en) * | 2017-01-05 | 2017-05-10 | 杭州肯都文化创意有限公司 | Photo machine and printing method thereof |
| CN107705423B (en) * | 2017-10-13 | 2019-12-31 | 保定钞票纸业有限公司 | A method and system for online monitoring of banknote paper flow direction |
| CN107867043A (en) * | 2017-11-17 | 2018-04-03 | 佛山市高明区生产力促进中心 | A kind of PVC film printing machine with detection function |
| CN110706423A (en) * | 2019-09-03 | 2020-01-17 | 深圳怡化电脑股份有限公司 | Bill printing method, device and readable medium |
| CN111766248B (en) * | 2020-07-07 | 2024-12-24 | 四川中烟工业有限责任公司 | A steel stamp online detection system and method based on color CCD |
| CN112288688A (en) * | 2020-09-30 | 2021-01-29 | 北京中科慧眼科技有限公司 | Method, system and device for online detection of printed matter based on image acquisition |
| CN112748128A (en) * | 2020-12-24 | 2021-05-04 | 凌云光技术股份有限公司 | Front and back synchronous detection system |
| CN113109346A (en) * | 2021-03-08 | 2021-07-13 | 中国第一汽车股份有限公司 | Automatic surface quality detection system and method for automobile panel plate |
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| CN2512040Y (en) * | 2001-06-28 | 2002-09-18 | 上海印钞厂 | Multifunctional quality inspection device banknotes |
| JP5193409B2 (en) * | 2001-09-21 | 2013-05-08 | 株式会社東芝 | Inspection method and test medium for paper sheet processing apparatus and paper sheet processing apparatus |
| CN101976475A (en) * | 2010-06-08 | 2011-02-16 | 北京新岸线软件科技有限公司 | Paper money identification method and device |
| CN102136165B (en) * | 2010-12-23 | 2012-07-25 | 西安印钞有限公司 | System and method for detecting front and back face qualities of imprinted Renminbi (RMB) large-page product |
| CN202632401U (en) * | 2012-05-14 | 2012-12-26 | 吴建华 | Multifunctional spectral note identifier |
| CN103434268B (en) * | 2013-08-21 | 2016-09-14 | 北京华夏视科图像技术有限公司 | Detecting system for printing equipment |
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Address after: No. 23 Baizhifang Street, Xicheng District, Beijing 100054 Patentee after: BEIJING BANKNOTE PRINTING Co.,Ltd. Patentee after: SHANGHAI BANKNOTE PRINTING Co.,Ltd. Patentee after: China Banknote Printing and Minting Group Co.,Ltd. Address before: No. 23 Baizhifang Street, Xicheng District, Beijing 100054 Patentee before: BEIJING BANKNOTE PRINTING Co.,Ltd. Patentee before: SHANGHAI BANKNOTE PRINTING Co.,Ltd. Patentee before: CHINA BANKNOTE PRINTING AND MINTING Corp. |
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