CN116000460A - Online vision guiding laser coding method and device - Google Patents
Online vision guiding laser coding method and device Download PDFInfo
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- CN116000460A CN116000460A CN202211694151.2A CN202211694151A CN116000460A CN 116000460 A CN116000460 A CN 116000460A CN 202211694151 A CN202211694151 A CN 202211694151A CN 116000460 A CN116000460 A CN 116000460A
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Abstract
The invention discloses an online vision guiding laser coding method and device, which are characterized in that a vision coordinate system is unified, a Mark point identification library is formed, relative position information between a coding position and Mark points is obtained, a movement distance corresponding to a single pixel is obtained, and the coding method specifically comprises the steps of moving the Mark points to a camera view field, collecting Mark point images, identifying and positioning the Mark points, guiding the center of a vibrating mirror to move to a coding area, laser coding, two-dimensional code identification comparison, data uploading and the like before laser coding. The online vision-guided laser coding method is more automatic and intelligent, not only can be used for identifying and positioning through Mark, but also can be used for detecting the equipment state in real time, detecting coding effect, screening machined parts and avoiding adverse effects caused by the fact that defective products caused by machining flow into the market.
Description
Technical Field
The invention relates to the technical field of laser processing, in particular to an online visual guide laser coding method and device.
Background
With the advancement of China manufacturing 2025, the manufacturing mode and the processing form are greatly changed, so that the processing efficiency is improved, and meanwhile, the quality of the product is also improved. Laser technology plays an important role in the current manufacturing industry as a current high-tech technology. To accommodate the development needs of numerous industrial applications, laser processing is now also evolving along with intelligence and automation.
Disclosure of Invention
Aiming at the technical problems, the invention provides an online visual guidance laser coding method and device, wherein the online visual guidance laser coding method is more automatic and intelligent, can be used for identifying and positioning through Mark, can also be used for detecting equipment states in real time, detecting coding effects, screening workpieces and avoiding adverse effects caused by the fact that defective products caused by processing flow into markets.
An on-line vision guiding laser coding method,
before laser coding, the following preparation work is finished: unifying the spatial position relation of the vision system, the laser coding system and the height measurement system with a vision system coordinate system; according to different template workpiece types and sizes, obtaining template workpiece images to manufacture Mark point identification templates and position coordinates, and forming a Mark point identification library; adjusting a triaxial mobile platform to obtain coordinates of a position to be coded, and simultaneously obtaining relative position information between the coding position and Mark points; obtaining a motion distance corresponding to a single pixel;
after the preparation work is finished, the motion assembly is guided to a processing position by utilizing an image recognition positioning technology to perform laser coding and visual code reading detection, and the method specifically comprises the following steps of:
firstly, a triaxial mobile platform moves Mark points to be identified into a camera view field;
shooting by a camera, and collecting Mark point images for identifying and positioning;
step three, carrying out enhancement processing on the Mark point images, and carrying out template matching to obtain Mark point coordinate positions and angles;
step four, according to the relative position relation between Mark points of the coding area, the coordinate position of the coding area is obtained, and the triaxial moving platform moves the coding area to the center of the vibrating mirror;
fifthly, the control software sends a marking trigger signal to a laser marking system, and the system performs marking according to the set two-dimensional code;
step six, after the laser coding is finished, the visual code reading system collects two-dimensional code images through a camera, performs two-dimensional code identification, and compares the identification result with the set two-dimensional code content;
and step seven, after the two-dimension code identification and comparison are completed, uploading the data such as Mark point coordinates, code printing area coordinates, marking parameters, two-dimension code content, comparison results and the like of the workpiece to a server, so that the process parameters and quality tracing can be conveniently adjusted.
As the optimization of the technical scheme, the laser coding system is used for marking two-dimensional code information on the workpiece; the vision system is used for positioning Mark points, guiding the motion platform to move to the position to be processed and identifying two-dimensional code information; the height measurement system is used for automatically measuring height, so that a camera is positioned at a clear image when the vision system works, and a workpiece is positioned on a laser focal plane when laser coding is performed.
As the optimization of the technical scheme, the axes of the laser coding system and the axes of the vision system are parallel to the axes of the height measurement system and are vertical downwards, the XY direction offset exists, the three axes are aligned to the same point on the workpiece through adjusting the triaxial moving platform, corresponding three-dimensional coordinates are recorded respectively, and the coordinate system relation among the axes of the coding system, the axes of the vision system and the height measurement system can be obtained, so that the coordinate system is unified.
As the optimization of the technical scheme, mark point identification and positioning adopts a template matching method, a template is required to be manufactured first, and the template is trained according to a certain angle step length so as to adapt to multi-angle template matching.
As the optimization of the technical scheme, the relative position information between the code printing position and the Mark point is determined according to the Mark point position, the angle and the relative position relation, the moving assembly is guided to move to the processing position after the position relation is determined, and the vibrating mirror system is used for printing codes according to the angle adjustment two-dimensional code direction.
The utility model provides an online vision guide laser coding device, includes laser coding subassembly, vision subassembly, altimeter, material transmission subassembly and triaxial moving platform, laser coding subassembly is including laser generator, laser transmission light path, mirror and the focusing mirror of connecting in order, laser generator is fixed in triaxial moving platform's X axle track, mirror and the focusing mirror of shaking are fixed in triaxial moving platform's Z axle track, vision subassembly is fixed in triaxial moving platform's Z axle track, including high definition CCD camera, industrial lens, illumination light source, the altimeter is fixed in triaxial moving platform's Z axle track, material transmission subassembly adopts syllogic material conveying mechanism, and syllogic material conveying mechanism's middle conveying section is installed on triaxial moving platform's Y axle track, and syllogic material conveying mechanism's left and right conveying section is used for material loading and unloading transmission respectively, triaxial moving platform's Y axle track is fixed in the bottom plate, installs the orbital portal frame of being used for fixed X axle on the bottom plate, Z axle track and X axle track sliding connection.
As the optimization of the technical scheme, the novel smoke-exhausting device further comprises a smoke-exhausting tube, and a smoke-exhausting opening of the smoke-exhausting tube is arranged close to the lower portion of the focusing lens.
The invention has the beneficial effects that:
1. according to the on-line vision guide laser coding method and device, the vision system is used for positioning and guiding the laser processing system to the processing position for processing, the vision system is used for detecting the coding effect again, defective products are removed, defective products caused by processing reasons are prevented from flowing into the market, and hidden quality hazards are left.
2. The online vision-guided laser coding method and device of the invention upload processing parameters and related data by using a network communication technology, are used for quality tracing and process optimization, and realize closed-loop management of the whole processing process.
3. The on-line vision guiding laser coding method and device adopt the three-section type material conveying device, the triggering sensor is arranged on the conveying device, and the processing flow is controlled so as to realize the full automation of the processing procedure, and the second section of the three-section type material conveying device is arranged on the Y-axis track of the three-axis moving platform, so that the processing area of equipment is further enlarged.
Drawings
FIG. 1 is a flow chart of the laser coding method of the present invention.
Fig. 2 is a schematic structural diagram of a laser coding device according to the present invention.
The reference numerals are as follows: 1-altimeter, 2-material transmission component, 3-laser generator, 4-laser transmission light path, 5-galvanometer, 6-focusing mirror, 7-X axis track, 8-Z axis track, 9-high definition CCD camera, 10-industrial lens, 11-illumination light source, 12-Y axis track, 13-bottom plate, 14-portal frame, 15-smoke exhaust tube.
Detailed Description
The technical scheme of the invention is clearly and completely described below with reference to the accompanying drawings. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to fall within the scope of the invention.
An on-line vision guiding laser coding method,
before laser coding, the following preparation work is finished: unifying the spatial position relation of the vision system, the laser coding system and the height measurement system with a vision system coordinate system; according to different template workpiece types and sizes, obtaining template workpiece images to manufacture Mark point identification templates and position coordinates, and forming a Mark point identification library; adjusting a triaxial mobile platform to obtain coordinates of a position to be coded, and simultaneously obtaining relative position information between the coding position and Mark points; obtaining a motion distance corresponding to a single pixel;
after the preparation work is finished, the motion assembly is guided to a processing position by utilizing an image recognition positioning technology to perform laser coding and visual code reading detection, and the method specifically comprises the following steps of:
firstly, a triaxial mobile platform moves Mark points to be identified into a camera view field;
shooting by a camera, and collecting Mark point images for identifying and positioning;
step three, carrying out enhancement processing on the Mark point images, and carrying out template matching to obtain Mark point coordinate positions and angles;
step four, according to the relative position relation between Mark points of the coding area, the coordinate position of the coding area is obtained, and the triaxial moving platform moves the coding area to the center of the vibrating mirror;
fifthly, the control software sends a marking trigger signal to a laser marking system, and the system performs marking according to the set two-dimensional code;
step six, after the laser coding is finished, the visual code reading system collects two-dimensional code images through a camera, performs two-dimensional code identification, and compares the identification result with the set two-dimensional code content;
and step seven, after the two-dimension code identification and comparison are completed, uploading the data such as Mark point coordinates, code printing area coordinates, marking parameters, two-dimension code content, comparison results and the like of the workpiece to a server, so that the process parameters and quality tracing can be conveniently adjusted.
As the optimization of the technical scheme, the laser coding system is used for marking two-dimensional code information on the workpiece; the vision system is used for positioning Mark points, guiding the motion platform to move to the position to be processed and identifying two-dimensional code information; the height measurement system is used for automatically measuring height, so that a camera is positioned at a clear image when the vision system works, and a workpiece is positioned on a laser focal plane when laser coding is performed.
In the embodiment, the axis of the laser coding system and the axis of the vision system are parallel to the axis direction of the height measurement system and are vertical downwards, and the XY direction offset exists, so that the three axes are aligned to the same point on the workpiece by adjusting the triaxial moving platform, corresponding three-dimensional coordinates are recorded respectively, and the coordinate system relation among the axis of the coding system, the axis of the vision system and the height measurement system can be obtained, and therefore the coordinate system is unified.
In this embodiment, mark point identification and positioning adopts a template matching method, and a template is required to be manufactured first, and training is performed on the template according to a certain angle step length so as to adapt to multi-angle template matching.
In this embodiment, the relative position information between the code printing position and the Mark point is determined according to the Mark point position, angle and relative position relation, the moving assembly is guided to move to the processing position after the position relation is determined, and the galvanometer system performs code printing according to the angle adjustment two-dimensional code direction.
The utility model provides an online vision guide laser coding device, includes laser coding subassembly, vision subassembly, altimeter 1, material transmission subassembly 2 and triaxial moving platform, laser coding subassembly is including laser generator 3, laser transmission light path 4, galvanometer 5 and the focusing mirror 6 of connecting in order, laser generator 3 is fixed in triaxial moving platform's X axle track 7, galvanometer 5 and focusing mirror 6 are fixed in triaxial moving platform's Z axle track 8, vision subassembly is fixed in triaxial moving platform's Z axle track 8, including high definition CCD camera 9, industrial lens 10, illumination source 11, altimeter 1 is fixed in triaxial moving platform's Z axle track 8, material transmission subassembly 2 adopts syllogic material conveying mechanism, and syllogic material conveying mechanism's middle conveying section is installed in triaxial moving platform's Y axle track 12, and syllogic material conveying mechanism's left and right conveying section is used for material loading and unloading transmission respectively, triaxial moving platform's Y axle track 12 is fixed in bottom plate 13, installs on the bottom plate 13 and is used for fixed X axle 12, Z axle track 7 is connected with Z axle track 8.
In this embodiment, the device further comprises a smoke exhaust tube 14, and a smoke exhaust port of the smoke exhaust tube 14 is arranged near the lower part of the focusing lens 6.
The laser generator 3 is used for generating laser, the laser transmission light path 4 is used for transmitting the laser, the galvanometer 5 is used for deflecting the laser beam to realize processing scanning coding, and the focusing mirror 6 is used for focusing the expanded laser into a tiny light spot. The three optical axes of the altimeter 1, the laser coding assembly and the vision assembly are parallel, have a translation relationship and have fixed relative positions. The altimeter 1 transmits the measured height data to an altimeter system, and the altimeter system adjusts the Z-axis track 7 according to the set height control to control the high-definition CCD camera 9 to form a clear image and the processing area to be positioned on the laser focal plane. The material transmission position is automatically controlled by the photoelectric sensor in the material transmission assembly.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. An online vision guiding laser coding method is characterized in that:
before laser coding, the following preparation work is finished: unifying the spatial position relation of the vision system, the laser coding system and the height measurement system with a vision system coordinate system; according to different template workpiece types and sizes, obtaining template workpiece images to manufacture Mark point identification templates and position coordinates, and forming a Mark point identification library; adjusting a triaxial mobile platform to obtain coordinates of a position to be coded, and simultaneously obtaining relative position information between the coding position and Mark points; obtaining a motion distance corresponding to a single pixel;
after the preparation work is finished, the motion assembly is guided to a processing position by utilizing an image recognition positioning technology to perform laser coding and visual code reading detection, and the method specifically comprises the following steps of:
firstly, a triaxial mobile platform moves Mark points to be identified into a camera view field;
shooting by a camera, and collecting Mark point images for identifying and positioning;
step three, carrying out enhancement processing on the Mark point images, and carrying out template matching to obtain Mark point coordinate positions and angles;
step four, according to the relative position relation between Mark points of the coding area, the coordinate position of the coding area is obtained, and the triaxial moving platform moves the coding area to the center of the vibrating mirror;
fifthly, the control software sends a marking trigger signal to a laser marking system, and the system performs marking according to the set two-dimensional code;
step six, after the laser coding is finished, the visual code reading system collects two-dimensional code images through a camera, performs two-dimensional code identification, and compares the identification result with the set two-dimensional code content;
and step seven, after the two-dimension code identification and comparison are completed, uploading the data such as Mark point coordinates, code printing area coordinates, marking parameters, two-dimension code content, comparison results and the like of the workpiece to a server, so that the process parameters and quality tracing can be conveniently adjusted.
2. The on-line vision-guided laser coding method of claim 1, wherein: the laser coding system is used for marking two-dimensional code information on the workpiece; the vision system is used for positioning Mark points, guiding the motion platform to move to the position to be processed and identifying two-dimensional code information; the height measurement system is used for automatically measuring height, so that a camera is positioned at a clear image when the vision system works, and a workpiece is positioned on a laser focal plane when laser coding is performed.
3. The on-line vision-guided laser coding method of claim 1, wherein: the axis of the laser coding system and the axis of the vision system are parallel to the axis of the height measurement system and are vertical downwards, XY direction offset exists, three axes are aligned to the same point on the workpiece by adjusting the triaxial moving platform, corresponding three-dimensional coordinates are recorded respectively, and the coordinate system relation among the axis of the coding system, the axis of the vision system and the height measurement system can be obtained, so that the coordinate system is unified.
4. The on-line vision-guided laser coding method of claim 1, wherein: the Mark point identification and positioning adopts a template matching method, and a template is required to be manufactured first, and the template is trained according to a certain angle step length so as to adapt to multi-angle template matching.
5. The on-line vision-guided laser coding method of claim 1, wherein: and determining the relative position information between the code printing position and the Mark point according to the position, angle and relative position relation of the Mark point, guiding the motion assembly to move to the processing position after the position relation is determined, and adjusting the two-dimensional code direction by the galvanometer system according to the angle to code.
6. An on-line vision guide laser coding device which is characterized in that: the laser marking device comprises a laser marking assembly, a vision assembly, a height indicator, a material transmission assembly and a triaxial moving platform, wherein the laser marking assembly comprises a laser generator, a laser transmission light path, a vibrating mirror and a focusing mirror which are sequentially connected, the laser generator is fixed on an X-axis track of the triaxial moving platform, the vibrating mirror and the focusing mirror are fixed on a Z-axis track of the triaxial moving platform, the vision assembly is fixed on the Z-axis track of the triaxial moving platform, the vision assembly comprises a high-definition CCD camera, an industrial lens and an illumination light source, the height indicator is fixed on the Z-axis track of the triaxial moving platform, the material transmission assembly adopts a three-section type material transmission mechanism, a middle transmission section of the three-section type material transmission mechanism is arranged on a Y-axis track of the triaxial moving platform, left and right transmission sections of the three-section type material transmission mechanism are respectively used for feeding and discharging transmission, the Y-axis track of the triaxial moving platform is fixed on a bottom plate, a portal frame for fixing the X-axis track is arranged on the bottom plate, and the Z-axis track is in sliding connection with the X-axis track.
7. The on-line vision-guided laser coding device of claim 6, wherein: the device also comprises a smoke exhaust tube, wherein a smoke exhaust port of the smoke exhaust tube is arranged close to the lower part of the focusing lens.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116851929A (en) * | 2023-09-04 | 2023-10-10 | 武汉华工激光工程有限责任公司 | Object visual positioning laser marking method and system under motion state |
| CN117245228A (en) * | 2023-11-20 | 2023-12-19 | 广东码清激光智能装备有限公司 | Workpiece identification and flexible processing device and method |
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- 2022-12-28 CN CN202211694151.2A patent/CN116000460A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116851929A (en) * | 2023-09-04 | 2023-10-10 | 武汉华工激光工程有限责任公司 | Object visual positioning laser marking method and system under motion state |
| CN117245228A (en) * | 2023-11-20 | 2023-12-19 | 广东码清激光智能装备有限公司 | Workpiece identification and flexible processing device and method |
| CN117245228B (en) * | 2023-11-20 | 2024-01-26 | 广东码清激光智能装备有限公司 | Workpiece identification and flexible processing device and method |
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