CN1624460A - On-line datecting device for printed matter quality - Google Patents
On-line datecting device for printed matter quality Download PDFInfo
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- CN1624460A CN1624460A CN 200410061395 CN200410061395A CN1624460A CN 1624460 A CN1624460 A CN 1624460A CN 200410061395 CN200410061395 CN 200410061395 CN 200410061395 A CN200410061395 A CN 200410061395A CN 1624460 A CN1624460 A CN 1624460A
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Abstract
An on-line testing apparatus for quality of printed matter , which can do realtime image collection and procession to the printed matter on producing production line , test kinds of quality disadvantages and alarm. Its mainframe is connected with auxiliary machinery by net, connection, mainframe sets parameter to be collected, makes controlling order and processing with the data passed from auxiliary machinery; the auxiliary machinery collects image by cameral according to the order from mainframe, processes the image information and pass the result to mainframe; the cameral group applies line array industrial camera and is installed above the printed matter by four degrees of freedom clamp mechanism; alarm apparatus are installed on mainframe and auxiliary machinery; photoelectric coder is installed on the side of print roll to measure displace of printed matter on print roll and outputs electrooptical signal to the cameral scanning control terminal; closed light box is among cameral group and printed matter , cameral dose scanning collection to the image of printed matter through the silt in the middle of the light box parallel to the axial line of print roll.
Description
Technical field
The invention belongs to machine vision technique and industrial detection art field, specifically, is a kind of distributed print quality on-line measuring device that can be applicable on the printing production line.
Background technology
Machine vision is a complex art that comprises technology such as digital image processing techniques, mechanical engineering technology, control technology, electric source lighting technology, optical image technology, computer hardware technique and human-machine interface technology.Because Vision Builder for Automated Inspection can be obtained bulk information fast, and be easy to design information and machining control information integration, therefore, machine vision technique is as a kind of detection means paid more and more attention and obtained application more and more widely in industrial detection.
The online detection of print product belongs to the application category of machine vision technique in the industrial detection field.To the traditional detection method of printing product quality mainly comprise check behind the artificial seal, artificial online naked eyes monitor, by monitor production line is monitored and to product random sampling fix check etc. several, it is serious to exist waste of raw materials, cause visual fatigue easily, and sampling Detection can not be to weak points such as product quality guarantee comprehensively.Along with the continuous development of printing technology, print speed printing speed and image complexity are all more and more higher, and the mode of production of manual control printing quality can't adapt to the actual needs of present print production.Therefore, guarantee the printed matter printing quality comprehensively and enhance productivity, print quality be carried out the online in real time detection just seem very important.
Recent years, high-speed CCD industry camera technique and high-performance computer are used widely, provide good hardware foundation for realizing that the online total quality of print product detects, match with high real-time algorithm and software processing technology, the development of print quality on-line measuring device just becomes current demand with exploitation.This series products manufacturer mainly contains the present Cognex that the U.S. is arranged that visual detection equipment can be provided in the world at present, the BOBST of Switzerland, TOKIMEC, the Futec of Japan and Nireco etc., and all be to adopt unit control or computing machine to add special transaction card mode to carry out image acquisition and processing, construction cycle is long, and maintainable and expandability is very limited.And the online quality detection device of networked distributed printed matter is not seen the report of relevant open source literature as yet.
Summary of the invention
The objective of the invention is to overcome above-mentioned the deficiencies in the prior art, a kind of print quality on-line measuring device is provided.This pick-up unit is a distributed frame, can gather in real time, handle and transmit printed matter image on the printing production line, detects accurately, locatees also to fly mass defect information such as China ink, cutter silk, foreign matter and warning in time is provided in the memory print product.
A kind of print quality on-line measuring device provided by the invention is characterized in that: main frame is connected by network with each slave, is used to be provided with acquisition parameter and issue steering order, and the data that each slave is uploaded are handled; The shooting unit adopts the linear array industrial camera, is installed on the top of printed matter by the video camera clamping mechanism, and each video camera links to each other with corresponding slave; Main frame is provided with the main frame alarm image deflects is reported to the police; Slave carries out image acquisition according to the instruction control shooting unit of main frame, and images acquired information is handled, and sends result to main frame by network then; Each slave is provided with the slave alarm image deflects is reported to the police; Photoelectric encoder is installed in the printed matter surface on the seal roller, measures the rotating speed and the output pulse signal of seal roller, for video camera provides the line sweep control signal; Closed lamp box is provided with slit in the middle of the lamp box between shooting unit and printed matter, slit direction is parallel with the seal roll axis; Video camera carries out scanning collection by this slit to the printed matter image.
Left-right symmetric is distributed with fluorescent tube in the above-mentioned closed lamp box, and the centre on lamp box top is provided with a pair of baffle plate and forms slit, and light barrier is positioned at both sides, lamp box below, is used to prevent down that the light of fluorescent tube directly impinges upon seal roller surface, and plays sealing process; Baffle plate all links to each other with end plate with light barrier; Glass sheet is installed between light barrier and the baffle plate; The upper end of reflector and the upper end of baffle plate join, the lower end of reflector is connected with light barrier, the top of reflector is reflecting surface, reflecting surface is perpendicular to the plane of axis with the seal roller upper surface center line composition of last fluorescent tube, the bottom of reflector is a diffuse surface, the plane that diffuse surface is formed perpendicular to following fluorescent tube axis and seal roller upper surface center line; Last fluorescent tube is by printed matter surface on the direct irradiation seal roller behind the glass sheet, and through reflecting surface increase light intensity, following fluorescent tube shines printed matter surface through diffuse surface.
The structure of above-mentioned video camera clamping mechanism is: have the circular hole that passes for camera lens on the framework, it each side is equipped with a back shaft, and back shaft is connected with the U-shaped seat by bearing, and framework can be around the flute profile spatial rotation of back shaft at the U-shaped seat; Two extension springs are installed between framework and U-shaped seat, and extension spring one end is fixed on the side plate of U-shaped seat, and the other end is fixed on the supporting seat of both sides, framework below; The right angle is supported and fixed on the bottom of one side side plate of U-shaped seat, and the direct dialing piece is fixed on a side of framework, and set screw is installed in the right angle and supports, and the set screw upper end withstands on the direct dialing piece; Be added with guide piece between shifting block and right angle support, the guide piece upper end is connected with shifting block by clamping screw, and the lower end is by gathering sill and the guide blot and the right angle support and connection of guide piece; Be provided with two groups of bolts between U-shaped seat and the base plate, one group is used to be fastenedly connected U-shaped seat and base plate, and an end of another group passes the surface that withstands on base plate behind the U-shaped seat by being threaded; Base plate is installed in the guide rail chute on the camera box body wall by set bolt, and the mounting hole of set bolt is a slotted hole up and down on the base plate.
The present invention adopts high performance computing machine and high-resolution high speed linear array CCD industrial camera, has realized a kind of distributed print quality on-line measuring device.This device can detect, shows, store and send alerting signal in real time to the trickle defective that occurs in the printing process, can also be provided with parameters such as product type, long, the defect types of version and shows by database manipulation.Accuracy of detection of the present invention can reach Width detection resolution 0.15mm, direction of travel detection resolution 0.375mm.
Description of drawings
Fig. 1 is this pick-up unit structural representation;
Fig. 2 is this pick-up unit functional block diagram;
Fig. 3 is the end face structure synoptic diagram of closed lamp box;
Fig. 4 is a video camera clamping mechanism synoptic diagram;
Fig. 5 is the host work process flow diagram;
Fig. 6 is the slave workflow diagram.
Specific implementation
The present invention is further detailed explanation below in conjunction with accompanying drawing and example.
As shown in Figure 1, 2; main operation control desk 3 is arranged near the suitable position of production line; carry out profile and operational design according to ergonomics; there are the control circuit of main frame 4, each action button and power-down protection apparatus etc. in operating console 3 the insides; the surface is guidance panel, LCD and mouse action district, and main operation control desk 3 and the main frame 4 information transmission between the two is finished by guidance panel (action button and mouse, display).
Main frame 4 can come the output products parameter and detect defect information by the software control printer, also can after receiving slave 11 defect information, carry out defective warning output by main control system end alarm 1, main frame 4 is connected with the gigabit Ethernet that passes through of slave 11, can realize the setting of remote collection parameter and steering order by network.Simultaneously, main frame 4 can also realize the management of defective historical record and printout, and has auxiliary tableaux measuring ability, is the workflow diagram of main frame 4 as Fig. 5.
Slave 11 can be accepted the instruction of main frame 4 and finish the setting of capture card acquisition parameter, also can receive main frame 4 instruction beginning image acquisition and carry out the images acquired information processing, when detecting defective, transmit defect image data and processing result image information to main frame 4, and in time preserve defect image information and report to the police with control slave alarm 9.Fig. 6 is the workflow diagram of slave 11.
Shooting unit 7 adopts 3CCD high speed linear array industrial camera, place camera box 6 the insides, position and adjust by the video camera clamping mechanism, shooting unit 7 was realized with being connected by the image pick-up card that is installed in slave 11 the insides of slave 11, the acquisition parameter setting of shooting unit 7 and whether begin image acquisition and the order of the image pick-up card of slave 11 the insides is finished by network communication by main frame 4, the pulse signal that the line sweep of shooting unit 7 is controlled by photoelectric encoder 2 decides.
Photoelectric encoder 2 is installed in the printed matter surface on the seal roller 12, can accurately measure the rotating speed and the output pulse signal of seal roller, provides control signal for the video camera line sweep behind filter filtering;
Light source adopts closed lamp box 5 to throw light on, be positioned between shooting unit 7 and the acquisition target (printed matter 8), power supply is provided behind voltage stabilizing and rectifier rectification by slave 11 output currents, light source character is line source, video camera carries out scanning collection by the lamp box middle slit to image, and slit direction is parallel with the seal roll axis.
The end face structure signal of closed lamp box is shown in Figure 3, and closed lamp box 5 adopts steel plateelement to be spliced, and four fluorescent tube left-right symmetric distribute, and the fluorescent tube mount pad is fixed on the two end plates 22; Adopt a pair of baffle plate 19 in the middle of the lamp box, form slit 21, adopt between baffle plate 19 and the two end plates 22 to be welded to connect; Reflector 17 is formed according to the certain angle bending by steel plate, the top is connected with baffle plate 18 with hinge, and can raise to change fluorescent tube to both sides, bottom is connected with light barrier 13 with hasp, reflecting surface 20 on the reflector 17 is perpendicular to the plane of axis with the seal roller 12 upper surface center lines composition of last fluorescent tube 18, be coated with highlighted reflectorised paint and form direct reflection for surface of steel plate adds to strengthen intensity of reflected light, the plane that diffuse surface 16 is formed perpendicular to following fluorescent tube 14 axis and seal roller 12 upper surface center lines, and add at surface of steel plate and to be coated with white paint and to form diffuse effect; Last fluorescent tube 18 is by printed matter surface on the glass sheet 15 back direct irradiation seal rollers 12, and through reflecting surface 20 increase light intensity, following fluorescent tube 14 shines printed matter surface through diffuse surfaces 16; Light barrier 13 forms for the steel plate bending, and employing is welded to connect between the end plate 22, act as the light that prevents down fluorescent tube 14 and directly impinges upon seal roller 12 surfaces, and play sealing process; Transparent glass sheet 15 is installed between light barrier 13 and the baffle plate 19 by screw and press strip, and its effect is printing opacity and sealing lamp box, also can adopt the hair slide according to the light path needs; The direction of slit 21 is parallel with the seal roll axis, and video camera carries out scanning collection by the printed matter image on 21 pairs of seals of slit roller 12.
Closed lamp box 5 has adopted High Frequency Electric Ballast, to guarantee the no stroboscopic of illumination, adopts triphosphor tube light, guaranteeing the beautiful in colour and true of image, and can be to the every independent gauge tap of fluorescent tube in light is controlled.
The video camera clamping mechanism as shown in Figure 4, video camera vertically is placed on the quadra 33 and by bolt 32 and fixes, each short back shaft 30 of framework both sides is connected with U-shaped seat 25 by roller bearings, quadra 33 can be used for regulating the luffing angle of video camera around the flute profile spatial rotation of short back shaft 30 at U-shaped seat 25.Eccentric force that causes for the balance luffing angle regulates and enhancing mechanism damping property are equipped with two extension springs 24 between quadra 33 and U-shaped seat 25, fixed leg 23 1 ends are on U-shaped seat side plate, and the other end is on quadra 33 supported underneath seats 29.
The set screw 38 that right angle on the rotation U-shaped frame 25 supports on 37 can head on 33 rotations of shifting block 34 drive quadras within the specific limits, can carry out meticulous adjustment to camera angle.Unscrew the clamping screw 36 that is connected with shifting block 34 in the adjustment process and support 37 guide blots that are connected 39, screw latched position after adjusting to the right place again with the right angle.Adjustable extent is by the arc length decision of gathering sill on the guide piece 35 between shifting block 34 and the right angle support 37.
Eight coupling bolts between U-shaped seat 25 and the base plate 31 are divided into two groups, every group four, one group is fastening bolt group 27, be used for being fastenedly connected U-shaped seat 25 and base plate 31, another group is for adjusting bolt group 28, one end passes the surface that withstands on base plate 31 behind the U-shaped seat 25 by being threaded, by the principle of feed screw nut regulate U-shaped seat 25 in the horizontal direction before and after the degree of freedom of translation.
Base plate 31 is to be installed in the chute on the camera box box body wall by four set bolts 26, realizes the position adjustment of the horizontal direction left and right sides by set bolt 26 move left and right in chute.The mounting hole of set bolt 26 is a slotted hole up and down on the base plate 31, and set bolt 26 up and down can adjusting position in slotted hole, is used for realizing the degree of freedom of translation under the video camera in the vertical direction.
According to above detailed description to accompanying drawing and example, the present invention can have following technical characterstic:
(1) the present invention has adopted the distributed processing mode of main frame/slave, main operation console (main frame) Be arranged in the position that is suitable for operating, the position of slave then near the IMAQ point, has guaranteed at production line The apparatus arrangement scope in effectively detect control, be conducive to that the workshop is arranged and IMAQ advanced The row operated from a distance.
(2) main frame of the present invention and slave can adopt high-speed image processor, and use gigabit ether Net is finished a large amount of view data and the network transmission function of control instruction, guaranteed IMAQ, The real-time of processing, transmitting and store.
(3) the present invention has designed operating console and the friendly human-computer interaction interface that meets ergonomics, Be convenient to user's operation and defect image is carried out clear demonstration, operating personnel are difficult for feeling fatigue.
(4) the present invention adopts high-resolution linear array industrial camera, by high-precision photoelectric encoder Pulse signal carries out scan control, and accurately long the and image capture position of positioning printing product version can catch Tiny defect and color change to the high speed printing production line printed matter.
(5) the present invention has adopted main frame and slave two-stage type of alarm, and main frame adopts alarm lamp and buzzer Same alarm, slave only adopt alarm lamp to report to the police, and the position of alarm lamp with defective the position takes place Put consistently, be conducive under distributed processing mode in time to remind operating personnel's processing of reporting to the police.
(6) control circuit of the main operation control desk of this device can adopt the control of two-stage switch, prevents maloperation; On data processing, host and slave processors can adopt two hard disk redundant operation systems, can switch hard disk after a hard disk is out of order and work on; Power-off protection apparatus is arranged in data protection, has strengthened the reliability of pick-up unit system works,
(7) the present invention adopts closed lighting lamphouse, has designed special light path, and the image color that camera acquisition is arrived is true to nature, and details is clear, and no-reflection and dazzle light and disturb has effectively guaranteed collection image quality.
(8) designed four-degree-of-freedom video camera clamping mechanism among the present invention, not only can on four degree of freedom, adjust easily camera position and luffing angle, cooperate camera lens and lighting source to adjust video camera and reach the optimal acquisition position, can also absorb the suffered at work vibrations of video camera, target surface shake when preventing the camera acquisition image.
Claims (3)
1, a kind of print quality on-line measuring device is characterized in that:
Main frame (4) is connected by network with each slave (11), is used to be provided with acquisition parameter and issue steering order, and the data that each slave (11) is uploaded are handled; Shooting unit (7) adopts the linear array industrial camera, is installed on the top of printed matter by the video camera clamping mechanism, and each video camera is continuous with corresponding slave (11); Main frame (4) is provided with main frame alarm (1) image deflects is reported to the police;
Slave (11) carries out image acquisition according to the instruction control shooting unit (7) of main frame (4), and images acquired information is handled, and sends result to main frame (4) by network then; Each slave (11) is provided with slave alarm (9) image deflects is reported to the police;
Photoelectric encoder (2) is installed in the printed matter surface on the seal roller (12), measures the rotating speed and the output pulse signal of seal roller, for video camera provides the line sweep control signal;
Closed lamp box (5) is positioned between shooting unit (7) and the printed matter, is provided with slit in the middle of the lamp box, and slit direction is parallel with the seal roll axis; Video camera carries out scanning collection by this slit to the printed matter image.
2, pick-up unit according to claim 1, the interior left-right symmetric of described closed lamp box (5) is distributed with fluorescent tube (14,18), the centre on lamp box top is provided with a pair of baffle plate (19), forms slit (21), light barrier (13) is positioned at both sides, lamp box below, be used to prevent down that the light of fluorescent tube (14) directly impinges upon seal roller (12) surface, and play sealing process; Baffle plate (19) all links to each other with end plate (22) with light barrier (13); Glass sheet (15) is installed between light barrier (13) and the baffle plate (19); The upper end of the upper end of reflector (17) and baffle plate (19) joins, the lower end of reflector (17) is connected with light barrier (13), the top of reflector (17) is reflecting surface (20), reflecting surface (20) is perpendicular to the plane of axis with seal roller (12) the upper surface center line composition of last fluorescent tube (18), the bottom of reflector (17) is diffuse surface (16), the plane that diffuse surface (16) is formed perpendicular to following fluorescent tube (14) axis and seal roller (12) upper surface center line; Last fluorescent tube (18) is gone up printed matter surface by glass sheet (15) back direct irradiation seal roller (12), and increases light intensity through reflecting surface (20), and following fluorescent tube (14) shines printed matter surface through diffuse surface (16).
3, pick-up unit according to claim 1 and 2, the structure of described video camera clamping mechanism is: have the circular hole that passes for camera lens on the framework (33), its and arranged on left and right sides respectively is equipped with a back shaft (30), back shaft (30) is connected with U-shaped seat (25) by bearing, and framework (33) can be around the flute profile spatial rotation of back shaft (30) at U-shaped seat (25); Between framework (33) and U-shaped seat (25) two extension springs (24) are installed, extension spring (24) one ends are fixed on the side plate of U-shaped seat (25), and the other end is fixed on the supporting seat (29) of both sides, framework (33) below; The right angle supports the bottom that (37) are fixed on one side side plate of U-shaped seat (25), and direct dialing piece (34) is fixed on a side of framework (33), and set screw (38) is installed in the right angle and supports on (37), and set screw (38) upper end withstands on the direct dialing piece (34); Be added with guide piece (35) between shifting block (34) and right angle support (37), guide piece (35) upper end is connected with shifting block (34) by clamping screw (36), and the lower end is connected with guide blot (39) and right angle support (37) by the gathering sill of guide piece; Be provided with two groups of bolts (27,28) between U-shaped seat (25) and the base plate (31), one group is used to be fastenedly connected U-shaped seat (25) and base plate (31), and an end of another group passes the surface that withstands on base plate (31) behind the U-shaped seat (25) by being threaded; Base plate (31) is installed in the guide rail chute on the camera box body wall by set bolt (26), the mounting hole that base plate (31) is gone up set bolt (26) be about slotted hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100613952A CN100394166C (en) | 2004-12-20 | 2004-12-20 | On-line datecting device for printed matter quality |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100613952A CN100394166C (en) | 2004-12-20 | 2004-12-20 | On-line datecting device for printed matter quality |
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| CN1624460A true CN1624460A (en) | 2005-06-08 |
| CN100394166C CN100394166C (en) | 2008-06-11 |
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| CNB2004100613952A Expired - Fee Related CN100394166C (en) | 2004-12-20 | 2004-12-20 | On-line datecting device for printed matter quality |
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Assignee: Zhejiang Wellvast Packing Printing Products Co., Ltd. Assignor: Huazhong University of Science and Technology Contract fulfillment period: 2009.4.10 to 2017.4.11 Contract record no.: 2009330000976 Denomination of invention: On-line datecting device for printed matter quality Granted publication date: 20080611 License type: Exclusive license Record date: 2009.5.13 |
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