CN100468248C - Binocular active vision monitor suitable for precision machining - Google Patents
Binocular active vision monitor suitable for precision machining Download PDFInfo
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- CN100468248C CN100468248C CNB2006100481100A CN200610048110A CN100468248C CN 100468248 C CN100468248 C CN 100468248C CN B2006100481100 A CNB2006100481100 A CN B2006100481100A CN 200610048110 A CN200610048110 A CN 200610048110A CN 100468248 C CN100468248 C CN 100468248C
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Abstract
The invention relates to a binocular initiative vision monitoring device for precision machining. The feature is that it fixes three supports on base, and sliding rails are installed in the three supports and plumbing to bottom plane, sliding blocks are installed in the sliding rail, the round guiding rail connecting to the three sliding blocks, two dollies installed on the round guiding rail, each dollies having a cradle head that is installed a video camera. The base line and location between the two video cameras would be adjusted by sliding on the guiding rail. The vision system could flexibly adjust the observing anger. It has the advantages of parallel structure, simple moving mode and simple vision computing mode.
Description
Technical field
The present invention relates to machining visual monitoring field, particularly relate to a kind of binocular active vision device that is used for the monitoring of parallel machine precision optical machinery processing work space.
Background technology
Parallel machine is a kind of novel numerically controlled processing equipment based on parallel institution, compares with traditional numerically-controlled machine, and parallel machine is realized six-axis linkage easily, is a class virtual-shaft machine tool.
The appearance of parallel institution can be traced back to 1931, a kind of entertainment device that Gwinnett proposes in its patent based on sphere parallel mechanism, Gough had invented a kind of six degree of freedom tyre detection device based on parallel institution in 1962, this mechanism that nineteen sixty-five German Stewart invents Gough has first carried out the research on the theory of mechanisms meaning, and it is applied to the motion-generating device of flight simulator.From then on, this Gough-Stewart of being called mechanism is begun extensive concern by people, and is applied to parallel robot, parallel machine, airship docking adapter, micro-manipulating robot etc.The many Stewart mechanisms with six degree of freedom of the parallel machine at initial stage are as main body, after serve lower-mobility parallel machine, occur in succession with the various product model machines such as parallel machine of redundant chain, overcome little, actual accessible precision of work space and the low influence of rigidity that constraint of Stewart mechanism structure and unusual position shape etc. are brought from mechanism, quickened parallel machine practicability.As the Giddings﹠amp that in Chicago,U.S IMTS ' 94 fairs, released in 1994; Hexapod (the six sufficient worms) virtual-shaft machine tool of VARIAX of Lewis company (variation shape) and Ingersoll company, and the Tricept series of Neos Robotics company afterwards, the 6X type high-speed vertical machining center that Germany Milromat company produces, the HexaGlide parallel machine of technical college of Swiss Confederation development, the Linapod Three Degree Of Freedom lathe of Stuttgart, Germany university, parallel connection engraving lathe of Chinese University On The Mountain Of Swallows or the like.
The popular feature of parallel machine is the concurrency and the symmetry of mechanism, has that rigidity is big, response speed is fast, be suitable for Machining Complicated Profile, advantages such as machine tool structure is simple, control easily, technical value added height, imaginary axis processing.But along with the popularization of range of application, also there are some problem demanding prompt solutions in machining precision and intelligent growth of requirement.At first, the kinematic pair of parallel machine majority is problems such as hinge, the precision of hinge, gap, influences the actual machining precision of parallel machine; Secondly, in process such as solid processing, complex-curved processing, need discern and intelligent adjustment processing component and environmental change.Therefore the machine tooling process need carries out the real-time vision monitoring to work space, according to the visual analysis of surveillance map picture, the precision of processing is detected, mechanism is demarcated, processing environment is discerned,, fed back to the control system of lathe to produce the visual servo signal.
The monitoring range of the vision monitor of parallel machine is the work space of parallel machine, and existing vision monitor mostly is the fixed cameras monitoring system and is connected in the hand-eye system of serial mechanism.In the monitoring system of fixed cameras, video camera (one or more) fixedly places outside the work space, monitor from fixing visual angle, advantage is that mechanism and vision mode are simple, but need the big visual field, existence can't cover whole visual space, can't change the visual angle, visual occlusion appears, shortcomings such as bearing accuracy difference; The hand-eye system that is connected in serial mechanism is that video camera is connected in the serial mechanism end, adjust the visual angle of video camera by the control serial mechanism, though this mechanism possesses certain visual angle adjustment capability, but its visual angle setting range is limited, and do not meet the symmetric characteristics of parallel institution and work space thereof, have the monitoring of existence blind spot, visual angle to change shortcomings such as dumb yet.
In sum, be used for the sighting device of parallel machine precision optical machinery processing work space monitoring, require sighting device to be fit to the characteristics of parallel machine concurrency on the one hand, do not influencing under the parallel machine working condition, make things convenient for the assembling and the operation of vision monitor; Require sighting device can monitor the whole work space of parallel robot on the other hand, and possess flexible transformation observation angle, with the expansion of visual performances such as realizing that vision is dodged; In addition, also require the architectural characteristic of sighting device can make things convenient for vision to calculate.
Summary of the invention
In order to overcome existing fixed video camera monitoring system and the above-mentioned deficiency that is connected in the hand-eye system of serial mechanism, the invention provides a kind of binocular active vision device that is applicable to Precision Machining monitoring in the little work space.This invention utilizes the symmetry of parallel machine mechanism concurrency and structure, with the parallel machine work space is observation scope, to realize that multi-angle is observed, vision is dodged on a large scale is target, has realized parallel machine work accurately location and cognitive environment information and visual servo.
The technical solution adopted for the present invention to solve the technical problems is: three vertical support frame symmetries are fixed on the horizontal base, and the slide rail of a fixed length connecting rod is arranged on each support, and the slide block that can slide up and down is arranged on each slide rail.Circular guideway and slide block are connected, and parallel with base, the plane maintenance level of circular guideway and can moving up and down along slide rail.Two dollies that can move on circuit orbit are set on the circular guideway.A The Cloud Terrace is installed on each dolly, and The Cloud Terrace is made of the revolute pair of two quadratures, and the rotation axis of two revolute pairs is set in the radial direction and the tangential direction of round rail.A video camera is installed on each The Cloud Terrace.The moving up and down of wherein round rail, dolly on circular guideway motion and the pairwise orthogonal rotation axis of The Cloud Terrace to rotation be the active drive parts, realizes that two video cameras formation baselines are adjustable, the binocular active vision monitor of visual angle dynamic adjustable.
The invention has the beneficial effects as follows: (1) two video camera pose controllability.By leading screw control circular guideway moving up and down and driving trolley along the moving of circular guideway, can adjust the position of two video cameras; By of the rotation of two revolute pairs of The Cloud Terrace in circle rail radius and tangent line pairwise orthogonal direction, drive the rotation of two video cameras, can adjust the attitude of video camera, constitute the adjustable binocular active vision system of baseline.Thereby reach the optimal viewing angle observation of target and the ability of adjusting the visual angle on a large scale, help planning and realization observed object is accurately located and vision is dodged.(2) vision monitor with parallel machine coupling, can reduce of the influence of factor such as parallel machine operational vibration to vision system.(3) has regular geometric relationship between the active movement countershaft of vision monitor.Adjust two normal directions that axially are round rail plane that move up and down direction and the video camera of the guide rail integral body of camera position move along circular guideway, two rotation axiss adjusting the video camera attitude are to radius that is respectively round rail and tangential direction.Therefore, three axis become mutually orthogonal relation, describe easily and express, and can reduce the complicacy of system model, make things convenient for vision system modeling and calculating.
Description of drawings
Fig. 1 is for being suitable for the structural representation of precision machined binocular active vision monitor;
Fig. 2 is the structural representation of circular guideway, dolly, The Cloud Terrace, video camera;
Fig. 3 concerns synoptic diagram between each active movement countershaft.
At Fig. 1, among Fig. 2 and Fig. 3,1,12,13. stepper motor, 2,7,11. support, 3,10. leading screw, 4,9. dolly, 5. circular guideway, 6. base, 8. slide block, 14. servomotors, 15. worm screw, 16. worm gears, 17. fixed mounts, 18. transmission shaft, 19. gear, 20. support wheels, 21. outer rails, 22. external toothing, 23. interior rail, 24,26. interior rail slide block, 25. vehicle frames, 27. trolley platform, 28. The Cloud Terrace, 29. video cameras, the center of rotation of 30. circular guideways, 31,32. be the center of rotation axis of two revolute pairs of The Cloud Terrace on the dolly 4,33,34. the center of rotation axis of two of The Cloud Terrace revolute pairs on the dolly 9, the center of rotation axis of 35. circular guideways, parallel with rail axis in each support.
Embodiment:
Be suitable for precision machined binocular active vision monitor and be independent of parallel machine, three supports 2,7,11 of symmetric arrangement are connected on the base 6, the guide rail that slide block is moved up and down respectively is housed in each support, is parallel to each other between the guide rail of each support, and vertical base 6 planes; Guide rail and slide block adopt screw-nut structure, and the slide block corresponding with leading screw is processed with internal thread, and three slide blocks of circular guideway 5 and three supports are connected, and keep the parallel base plane of circular guideway.Stepper motor 1,12,13 is installed in the top of three supports 2,7,11, and the output terminal of stepper motor 1,12,13 connects with leading screw respectively. Stepper motor 1,12,13 drives leading screw and rotates the synchro control slide block to move up and down along the guide rail that leading screw constitutes, and moves up and down as initiatively importing control circular guideway 5 maintenance levels; Two dollies 4,9 can move on circular guideway 5.By sliding up and down and the motion of two dollies on circular guideway of guide rail, the locus of two video cameras of installing on the control dolly and the base length between video camera.
Be suitable for precision machined binocular active vision monitor by the control leading screw drive the moving up and down of circular guideway 5, two dollies 4,9 on circular guideway motion and the rotation of The Cloud Terrace 28 as the active input of vision platform mechanism, constitute baseline position and adjustable length, optical axis is adjustable, the visual angle is adjustable dynamic binocular active vision system, realize visual monitoring to the parallel machine work space.In addition, the quantity of support can be provided with as required, does not influence the design of other parts of vision platform mechanism.
Design.
The center of rotation axis 35 of circular guideway is the centre normal of circular guideway 5, center of rotation axis 31,34 the tangential directions of two revolute pairs of The Cloud Terrace 28, center of rotation axis 32,33 the radial directions of two revolute pairs in addition at circular guideway 5 at circular guideway 5.As seen, axis 35,31,32 is mutually orthogonal, and axis 35,33,34 is mutually orthogonal, and this orthogonality relation remains in the motion of vision platform.
Claims (5)
1. one kind is suitable for precision machined binocular active vision monitor, comprise stepper motor, support, base and video camera, it is characterized in that: three stepper motors are installed in the top of three supports respectively, three support symmetric arrangement also are connected on the base, and the output terminal of stepper motor connects with leading screw in each support respectively; In three supports, the slide rail that slide block is moved up and down is housed respectively, is parallel to each other between the guide rail of each support, and vertical base plane; Three slide blocks are in the sustained height of slide rail, and are connected with same circular guideway, and two dollies are installed on circular guideway, on each trolley platform The Cloud Terrace are installed, and on each The Cloud Terrace video camera are installed.
2. suitable precision machined binocular active vision monitor according to claim 1, it is characterized in that: circular guideway is made of interior rail and outer rail, and the inboard of outer rail is processed with external toothing.
3. suitable precision machined binocular active vision monitor according to claim 2, it is characterized in that: trolley platform is installed on the vehicle frame, rail slide block, support wheel and gear in install the bottom of vehicle frame, support wheel and gear embed outer rail, gear and external toothing engagement; Rail in the interior rail slide block of dolly embeds.
4. suitable precision machined binocular active vision monitor according to claim 1, it is characterized in that: servomotor is installed on the trolley platform by fixed mount, the output shaft of servomotor connects worm screw, be installed in the apical position of transmission shaft with the worm gear of worm mesh, gear is installed in the bottom of transmission shaft.
5. suitable precision machined binocular active vision monitor according to claim 1, it is characterized in that: The Cloud Terrace has two revolute pairs, and the axis of two revolute pairs radius and the tangential direction with circular guideway respectively is identical.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100481100A CN100468248C (en) | 2006-08-03 | 2006-08-03 | Binocular active vision monitor suitable for precision machining |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100481100A CN100468248C (en) | 2006-08-03 | 2006-08-03 | Binocular active vision monitor suitable for precision machining |
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| CN1904782A CN1904782A (en) | 2007-01-31 |
| CN100468248C true CN100468248C (en) | 2009-03-11 |
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| CNB2006100481100A Expired - Fee Related CN100468248C (en) | 2006-08-03 | 2006-08-03 | Binocular active vision monitor suitable for precision machining |
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| CN105890638B (en) * | 2016-05-06 | 2018-07-06 | 福建农林大学 | A kind of multi-angle observation device |
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| CN106705941B (en) * | 2016-12-09 | 2023-11-07 | 上海交通大学 | Binocular vision navigation device |
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| CN1904782A (en) | 2007-01-31 |
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