CN103592953A - Camera control device and camera control method for printing plate quality inspection instrument - Google Patents

Camera control device and camera control method for printing plate quality inspection instrument Download PDF

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Publication number
CN103592953A
CN103592953A CN201310452376.1A CN201310452376A CN103592953A CN 103592953 A CN103592953 A CN 103592953A CN 201310452376 A CN201310452376 A CN 201310452376A CN 103592953 A CN103592953 A CN 103592953A
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camera
control module
motion
control
taking pictures
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CN201310452376.1A
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CN103592953B (en
Inventor
刘永江
杜旭东
毕明
张健
龙成
王雪
冯礼
万海燕
陈戌冬
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China Banknote Design Plate Making Co ltd
China Banknote Printing Technology Research Institute Co ltd
China Banknote Printing and Minting Group Co Ltd
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Beijing Banknote Currency Designing And Plating Co Ltd
China Banknote Printing and Minting Corp
Institute of Printing Science and Technology Peoples Bank of China
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Application filed by Beijing Banknote Currency Designing And Plating Co Ltd, China Banknote Printing and Minting Corp, Institute of Printing Science and Technology Peoples Bank of China filed Critical Beijing Banknote Currency Designing And Plating Co Ltd
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Abstract

The invention discloses a camera control device and a camera control method for a printing plate quality inspection instrument. The camera control device comprises a control unit, a control terminal, a camera motion control module and a camera position detection module. According to the camera control device and the camera control method disclosed by the invention, a double trigger photographing technology based on real-time position photographing of a camera is adopted, photographing parameters and motion parameters of the camera can be adjusted dynamically according to the plate texture content, correct photographing parameters and motion parameters are calculated through the first time of photographing under the condition that the printing plate is not radiated by a light source continuously, and photographing is carried out on the printing plate according to the correct parameters when the camera is triggered the next time, thereby realizing dynamic parameter photographing for the overall layout of the printing plate without influencing the printing plate to be inspected, and being good in photographing effect.

Description

A kind of camera control apparatus of plate quality somascope and control method thereof
Technical field
The invention belongs to plate quality inspection apparatus technical field, particularly a kind of camera control apparatus of plate quality somascope and control method thereof.
Background technology
After the large scale forme workpiece manufactures such as money forme complete, need to utilize plate quality somascope to check the quality of forme.When checking, first forme is fixed on worktable, then by camera control apparatus, control camera motion, make camera along X, Y direction, carry out two-dimensional scan campaign with respect to worktable; In motion process, camera is taken pictures to forme every fixing distance, and realization being taken pictures and measuring whole workpiece, so the image measuring system of large scale forme workpiece must be equipped with corresponding camera control apparatus.
The camera control apparatus of existing plate quality somascope, as the image measurer Design of Motion Control System > > (Pei Qionghua of Chinese periodical document < < based on GALIL, manufacturing informatization, the 7th phase in 2009), a kind of image measurer kinetic control system is disclosed, adopt the form of " Industrial Control Computer+motion control card " to build, by human-computer interaction interface, complete data and motion state shows, the tasks such as servocontrol and accurately location, this kinetic control system adopts touch-screen/motion controller, and two terminal scheme of computing machine/opc server/motion controller, and adopt stepping motor as servo driving element, grating scale is as feedback element, and the feedback signal of grating scale sends GALIL card to by terminal strip, after the compensation operation of GALIL card, send compensated pulse to servo-drive system, form a closed-loop control system.
But, there is following shortcoming in above-mentioned image measurer kinetic control system: 1. this system is when camera is taken pictures, adopt the unified parameter of taking pictures, in operational process, light source Chang Liang, camera kept taking pictures and dynamically adjust the parameter of taking pictures, but because the figure line content of forme is different, need to adopt the different parameters of taking pictures for the different position of forme, and part forme to be checked can not be by light source long-term irradiation, therefore no matter this system adopts above-mentioned which kind of mode, the effect that capital impact is taken, and then affect forme detection; 2. this system can not be adjusted camera site and angle in real time, and in practical application, when multiple batches of forme workpiece being taken pictures to scanning, due to operating personnel cannot guarantee the putting position of each workpiece and angle in full accord, and the position of workpiece and angle are affected by mechanical assembly precision also can, if adopt above-mentioned image measurer kinetic control system, its camera site and angle can not be carried out real-time change according to different workpieces, will cause the seamless spliced precision of successive image not high, and then affect the detection of plate quality.
Summary of the invention
For this reason, technical matters to be solved by this invention is the image measurer kinetic control system of prior art, shooting effect is bad, affect the problem that plate quality detects, and provide a kind of shooting effect good and do not affect camera control apparatus and the control method thereof of forme to be checked, further provide a kind of and can adjust in real time camera site and angle according to different workpieces, make the seamless spliced precision of successive image high, guarantee that plate quality detects camera control apparatus and the control method thereof of normally carrying out.
For solving the problems of the technologies described above, the technical solution used in the present invention is as follows:
(this part supplements after claim is finalized a text)
Technique scheme of the present invention has the following advantages compared to existing technology:
(1) camera control apparatus of plate quality somascope provided by the invention and control method thereof, two shooting technologies that trigger of taking pictures based on camera real time position have been adopted, take pictures parameter and kinematic parameter of camera can dynamically be adjusted according to version line content, at light source not prolonged exposure forme in the situation that, by taking pictures for the first time, calculate correct take pictures parameter and kinematic parameter, and with correct parameter, carry out forme while once triggering and take pictures upper, realization is taken pictures to the dynamic parameter of the whole space of a whole page of forme, do not affect forme to be measured, and shooting effect is good.
(2) camera control apparatus of plate quality somascope provided by the invention and control method thereof, when carrying out two-dimensional scan, adopt image high precision point technique, camera position and movement angle while dynamically adjusting every a line shooting according to template data, corrected because forme putting position and angle change or mechanical precision movement position and the angle causing that decline changes the impact bringing, increased substantially the precision of forme two-dimensional scan.
(3) camera control apparatus of plate quality somascope provided by the invention and control method thereof have been used graphic control panel and computing machine simultaneously, realize the two terminal controls to camera motion, make operating personnel can near worktable, carry out true-time operation; When adopting graphic control panel as control terminal, graphic control panel can directly be controlled camera motion by motion controller, realizes movement velocity and controls, manually crawl, absolute coordinates moves, and detected state switches, and suddenly stops, failure reset, control is switched, the functions such as motion state demonstration; When graphic control panel is switched to motion control power after computing machine, by computing machine, can carry out manual crawl, definitely/relative coordinate moves, path programmable movement, movement velocity is controlled, the functions such as motion state demonstration, thus realize the two terminal controls of graphic control panel/computing machine.
(4) camera control apparatus of plate quality somascope provided by the invention and control method thereof, adopt the data of scrambler to carry out motion control, and computing machine obtains X by the Multi-axis motion control card being arranged in main frame, the real time data of Y-axis grating scale, camera coordinates position is accurately measured, and possesses the function making zero at grating scale arbitrfary point reading, system adopt two independently position transducer (scrambler and high precision grating scale) carry out respectively position control and the position measurement of camera, positional accuracy measurement and position control accuracy are independent of each other, dynamic error and static error that servo-drive system produces have in the course of the work been eliminated.
(5) camera control apparatus of plate quality somascope provided by the invention and control method thereof, in the breadth of 800 * 600mm, camera position control accuracy 0.01mm, camera position measuring accuracy reaches 0.0025mm; Secondary based on grating scale position triggers shooting technology, has realized according to forme space of a whole page actual conditions and has dynamically adjusted camera exposure parameter; Camera position secondary aims at and the real-time adjustment technology of motion path, by image point technique is auxiliary, carries out camera position control, has realized and has carried out forme image and template image while comparing, and camera site is complete consistent with direction.
Accompanying drawing explanation
For content of the present invention is more likely to be clearly understood, below according to a particular embodiment of the invention and by reference to the accompanying drawings, the present invention is further detailed explanation, wherein
Fig. 1 is the schematic diagram of the camera control apparatus of plate quality somascope of the present invention;
Fig. 2 is that the camera control apparatus of plate quality somascope of the present invention carries out according to template data the schematic diagram that movement angle was aimed at and dynamically adjusted to secondary;
Fig. 3 is that the camera control apparatus camera fixed point of plate quality somascope of the present invention triggers the schematic diagram of taking pictures;
Fig. 4 is the electrical connection schematic diagram of the camera control apparatus of plate quality somascope of the present invention.
In figure, Reference numeral is expressed as: 1-motion controller, 2-X axle servomotor and scrambler, 3-Y axle servomotor and scrambler, 4-X axle grating scale, 5-Y axle grating scale, 6-measuring table, 7-Multi-axis motion control card, 8-OPC server, 9-graphic control panel, 10-camera, 11-computing machine.
Embodiment
The camera control apparatus of plate quality somascope provided by the invention and control method thereof are for the detection of sample money forme, after described sample money forme is placed on measuring table 6, need to take pictures, camera is under the control of camera control apparatus, every fixing distance, described sample money forme is taken pictures, then carry out subsequent operation.
As Figure 1-4, the camera control apparatus of described plate quality somascope, comprises control module, control terminal, camera motion control module and camera position detection module.
Described control module, for controlling the operation of described camera control apparatus, comprise the computing machine 11 and the motion controller 1 that are built-in with Multi-axis motion control card 7, described Multi-axis motion control card 7 is built in the main frame of computing machine 11, described Multi-axis motion control card 7 comprises camera body and assembly thereof by pci bus by camera 10() real-time coordinate be sent to described computing machine 11, by shielded cable, external trigger photographing signals is sent to described camera 10 and light source simultaneously.Under the control of described motion controller 1, described camera motion control module drives described camera 10 motions, described Multi-axis motion control card 7 is by the physical location of camera 10 described in described camera position monitoring modular Real-Time Monitoring, when described camera 10 is about to arrive default while taking pictures position, described Multi-axis motion control card 7 triggers light source ignitings and triggers described camera 10 parameter according to the rules and take pictures; After taking pictures, described computing machine 11 process the image of clapping calculate correct camera exposure parameter as the parameter of taking pictures next time, simultaneously described motion controller 1 is adjusted the movement velocity of described camera 10 in real time, and described camera 10 is continued to the default position motion of taking pictures of the next one; When described camera 10 is about to arrive next default while taking pictures position, described Multi-axis motion control card 7 triggers light source ignitings and triggers described camera 10 and take pictures according to the correct parameter calculating.
Described control terminal, is electrically connected to described control module, for receiving the also steering order of transmission user.Described control terminal comprises graphic control panel 9 and described computing machine 11, and described movement controller 1, by PROFIBUS industrial field bus and described graphic control panel 9, is accepted the real-time control of touch-screen.Described computing machine 11 is OLE for Process Control by the English full name of opc server 8(OPC) carry out communication with described motion controller 1; Described motion controller 1 is connected with described opc server 8 by industrial netting twine (5 class line) simultaneously, described computing machine 11 is connected with described opc server 8 by industrial netting twine (5 class line), thereby control described motion controller 1 by intended trajectory motion, and import the start point data after the adjustment calculating and direction of motion data into described motion controller 1.
Described camera motion control module, is electrically connected to described control module, for drives camera 10, moves to assigned address.Described camera motion control module comprises X-axis servomotor and scrambler 2 and Y-axis servomotor and scrambler 3; Between described X-axis servomotor and scrambler 2, described Y-axis servomotor and scrambler 3 and described motion controller 1, by PROFIBUS industrial field bus, connect.
Described camera position monitoring modular, is electrically connected to described control module, the physical location of camera 10 described in Real-Time Monitoring.Described camera position measurement module comprises respectively along X, each X-axis grating scale 4 and Y-axis grating scale 5 of installing of Y direction, described X-axis grating scale 4 and described Y-axis grating scale 5 all adopt high precision grating scale, and described X-axis grating scale 4 is all connected with described Multi-axis motion control card 7 by shielded cable with described Y-axis grating scale 5.
The camera control apparatus of described plate quality somascope of the present invention, its concrete camera control method comprises the following steps:
1. described control module is accepted the steering order of described control terminal, drives the camera control apparatus operation of plate quality somascope.
In the present embodiment, adopt described graphic control panel 9 as described control terminal, described graphic control panel 9 can directly be controlled servomotor by described motion controller 1 and move, and described computing machine 11 can be controlled described camera 10 motions according to the path of user's appointment.Described computing machine 11 calculates the position import data into described Multi-axis motion control card 7 of taking pictures of described camera 10 according to customer requirements.
2. described control module moves to assigned address by described camera motion control module drives camera 10, in real time the physical location of described camera 10 is transferred to described control module by described camera position monitoring modular simultaneously.
Under the control of described motion controller 1, described X-axis motor and encoded servo device 2 and described y-axis motor and encoded servo device 3 drive described camera 10 to move along X, Y-direction; Described computing machine 11 obtains the real time data of described X-axis grating scale 4 and described Y-axis grating scale 5 by the described Multi-axis motion control card 7 being arranged in main frame, thereby realizes the accurate measurement to camera position.
In the process of moving along setting track at described camera 10, at the starting point place of each line scanning, carry out the aiming of image high precision, carry out secondary location, the view data that described camera 10 is collected is compared in real time with the template data of the standard forme collecting in advance, calculate the current movement position of camera, the deviation of angle and standard form data acquisition position and angle, described control module recalculates sweep starting point and the scanning motion angle of this row according to these data, and carry out secondary aligning at sweep starting point place, dynamically adjust motion starting point and direction of motion, guarantee the accuracy of motion reference position and direction, make the camera site of current line consistent with template data with angle.In the present embodiment, described setting track is " bow " zag trajectory.
3. when described camera 10 is about to arrive default while taking pictures position, described control module triggers light source igniting and triggers described camera 10 parameter according to the rules and take pictures.
In the moving process of described camera 10, described Multi-axis motion control card 7 constantly reads the position data of the described camera 10 on described X-axis grating scale 4 and described Y-axis grating scale 5, when the physical location of described camera 10 is about to arrive while taking pictures position, described Multi-axis motion control card 7 sends the start pulse signal of taking pictures for the first time (TTL+5v), trigger light source igniting, and trigger described camera 10 parameter according to the rules simultaneously and take pictures.
4. after taking pictures, described computing machine 11 is processed institute's image of clapping and calculates correct camera exposure parameter as the parameter of taking pictures next time, adjusts in real time the movement velocity of described camera 10 simultaneously, makes described camera 10 continue to preset to the next one position of taking pictures and moves.
In the process of moving along setting track at described camera 10, at the starting point place of each line scanning, carry out the aiming of image high precision, carry out secondary location, the view data that described camera 10 is collected is compared in real time with the template data of the standard forme collecting in advance, calculate the current movement position of camera, the deviation of angle and standard form data acquisition position and angle, described control module recalculates sweep starting point and the scanning motion angle of this row according to these data, and carry out secondary aligning at sweep starting point place, dynamically adjust motion starting point and direction of motion, guarantee the accuracy of motion reference position and direction, make the camera site of current line consistent with template data with angle.In the present embodiment, described setting track is " bow " zag trajectory.
5. when described camera 10 is about to arrive next default while taking pictures position, described control module triggers light source igniting and triggers described camera 10 and take pictures according to the correct parameter calculating.
When taken pictures in position in the physical location arrival of described camera 10, described Multi-axis motion control card 7 sends the start pulse signal of taking pictures again, again triggers light source igniting, and triggers described camera 10 simultaneously and take pictures according to the parameter calculating.
6. repeating step is 4. to 5., until take complete.
7. after having taken pictures, described control module carries out clapped multiple image seamless spliced and shows on computer screen, realizes the seamless scanning of forme and takes pictures.
Obviously, above-described embodiment is only for example is clearly described, and the not restriction to embodiment.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here exhaustive without also giving all embodiments.And the apparent variation of being extended out thus or change are still among the protection domain in the invention.

Claims (9)

1. a camera control method for plate quality somascope, is characterized in that: comprises the following steps,
1. control module is accepted the steering order of control terminal, drives the camera control apparatus operation of plate quality somascope;
2. described control module moves to assigned address by camera motion control module drives camera (10), in real time the physical location of described camera (10) is transferred to described control module by camera position monitoring modular simultaneously;
3. when described camera (10) be about to arrive defaultly while taking pictures position, described control module triggers light source igniting and triggers described camera (10) parameter according to the rules and take pictures;
4. after taking pictures, described control module is processed institute's image of clapping and is calculated correct camera exposure parameter as the parameter of taking pictures next time, adjusts in real time the movement velocity of described camera (10) simultaneously, makes described camera (10) continue to preset to the next one position of taking pictures and moves;
5. when described camera (10) be about to arrive next defaultly while taking pictures position, described control module triggers light source igniting and triggers described camera (10) and take pictures according to the correct parameter calculating;
6. repeating step is 4. to 5., until take complete.
2. camera control method according to claim 1, it is characterized in that: in described step, 2. and 4. also comprise, in the process of moving along setting track at described camera (10), starting point place in each line scanning carries out precision of images aiming, the view data that described camera (10) is collected is compared in real time with the template data of the standard forme collecting in advance, calculate the current movement position of described camera (10), the deviation of angle and standard form data acquisition position and angle, described control module recalculates sweep starting point and the scanning motion angle of this row according to these data, and carry out secondary aligning at sweep starting point place, make the camera site of current line consistent with template data with angle.
3. camera control method according to claim 2, is characterized in that: described setting track is " bow " zag trajectory.
4. according to the arbitrary described camera control method of claim 1-3, it is characterized in that: in described step, also comprise that described control module carries out seamless spliced and demonstration by clapped multiple image after 6., realize the step that the seamless scanning of forme is taken pictures.
5. a camera control apparatus that adopts the plate quality somascope of the arbitrary described camera control method of the claims 1-4, comprises
Control module, controls the operation of described camera control apparatus;
Control terminal, is electrically connected to described control module, for receiving the also steering order of transmission user;
Camera motion control module, is electrically connected to described control module, for drives camera (10), moves to assigned address;
Camera position monitoring modular, is electrically connected to described control module, the physical location of camera (10) described in Real-Time Monitoring;
It is characterized in that:
Described control module comprises computing machine (11) and the motion controller (1) that is built-in with Multi-axis motion control card (7); Under the control of described motion controller (1), described camera motion control module drives described camera (10) motion; Described Multi-axis motion control card (7) is by the physical location of camera (10) described in described camera position monitoring modular Real-Time Monitoring, when described camera (10) be about to arrive defaultly while taking pictures position, described Multi-axis motion control card (7) triggers light source igniting and triggers described camera (10) and take pictures with the parameter of stipulating; After taking pictures, described computing machine (11) process the image of clapping calculate correct camera exposure parameter as the parameter of taking pictures next time, described motion controller (1) is adjusted the movement velocity of described camera (10) in real time simultaneously, and described camera (10) is continued to the default position motion of taking pictures of the next one; When described camera (10) be about to arrive next defaultly while taking pictures position, described Multi-axis motion control card (7) triggers light source igniting and triggers described camera (10) and take pictures with the correct parameter calculating.
6. the camera control apparatus of plate quality somascope according to claim 5, is characterized in that: described camera motion control module comprises X-axis servomotor and scrambler (2) and Y-axis servomotor and scrambler (3).
7. according to the camera control apparatus of the plate quality somascope described in claim 5 or 6, it is characterized in that: described control terminal comprises graphic control panel (9) and computing machine (11).
8. according to the camera control apparatus of the arbitrary described plate quality somascope of claim 5-7, it is characterized in that: described camera position measurement module comprises X-axis grating scale (4) and Y-axis grating scale (5).
9. according to the camera control apparatus of the arbitrary described plate quality somascope of claim 5-8, it is characterized in that: described computing machine (11) carries out communication by opc server (8) and described motion controller (1).
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CN111147748A (en) * 2019-12-31 2020-05-12 中融飞腾(北京)科技有限公司 Signal triggering system for CCD system on die-cutting machine
CN111398295A (en) * 2020-04-24 2020-07-10 上海御微半导体技术有限公司 Defect detection device and method thereof
CN112116668A (en) * 2020-11-23 2020-12-22 常州微亿智造科技有限公司 Optical copying method and device for quality inspection and quality inspection equipment
CN112532828A (en) * 2020-11-16 2021-03-19 北京控制与电子技术研究所 Intelligent multimedia acquisition system

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CN112532828A (en) * 2020-11-16 2021-03-19 北京控制与电子技术研究所 Intelligent multimedia acquisition system
CN112116668A (en) * 2020-11-23 2020-12-22 常州微亿智造科技有限公司 Optical copying method and device for quality inspection and quality inspection equipment
CN112116668B (en) * 2020-11-23 2021-04-06 常州微亿智造科技有限公司 Optical copying method and device for quality inspection and quality inspection equipment

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