CN104827189A - Laser engraving system provided with linear array camera - Google Patents
Laser engraving system provided with linear array camera Download PDFInfo
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- CN104827189A CN104827189A CN201510235941.8A CN201510235941A CN104827189A CN 104827189 A CN104827189 A CN 104827189A CN 201510235941 A CN201510235941 A CN 201510235941A CN 104827189 A CN104827189 A CN 104827189A
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- laser engraving
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Abstract
The invention relates to a laser engraving system provided with a linear array camera. The laser engraving system comprises a laser head, an industrial camera, a rotary mechanism for storing the laser head and the industrial camera, a control mechanism for controlling movement tracks of the laser head, the industrial camera and the rotary mechanism and a cellular board for storing carvings; the synchronization of the rotary speed of a rolling shaft and a camera scanning frequency can be finished through acquiring the rotary speed of a bearing by an encoder, and the industrial camera can automatically acquire an image every certain distance according to a designed movement track; the images are spliced on a computer to form a complete picture; then the picture is imported into image processing software and a peripheral outline of the picture is extracted to generate an outline vector pattern; the outline vector pattern is imported into engraving machine control software to be processed into a movement control instruction of the laser head and a corresponding pattern is carved, so that the image acquisition of columnar carvings is realized and the function of a laser engraving machine is enhanced.
Description
Technical field
The invention belongs to laser engraving and field of machine vision, especially relate to a kind of laser engraving system being furnished with line-scan digital camera.
Background technology
Laser engraving system utilizes based on Numeric Control Technology, and laser is process medium, the object properties that machined material melts instantaneously or gasifies under laser irradiates, thus reach the system of engraving object.
Existing laser carving method is generally adopt the image processing softwares such as CorelDRAW, AutoCAD, extract the circumference of image, generate contour vector figure, import the motion control instruction that engraving machine control software design is processed into laser head, engraving machine performs control instruction, the corresponding pattern of carve.If manual what a cylinder carving of carving, the image on carving is needed to copy, first will carry out IMAQ, and how to realize the precise acquisition of image and the image collected and laser engraving machine realized good fusion and just become present technical problem urgently to be resolved hurrily.
Summary of the invention
Object of the present invention be exactly in order to overcome above-mentioned prior art exist defect and provide a kind of can to the laser engraving system being furnished with line-scan digital camera of the IMAQ of large scale column carving.
Object of the present invention can be achieved through the following technical solutions:
Be furnished with a laser engraving system for line-scan digital camera, comprise
Laser head,
Industrial camera,
Place the rotating mechanism of laser head and industrial camera,
Control the controlling organization of laser head, industrial camera and rotating mechanism movement locus,
Place the cellular board of carving.
Described rotating mechanism comprises beam guideway and is arranged on the vertical guide rail of the perpendicular connection in beam guideway two ends.
Described laser head and industrial camera are mounted on beam guideway, and slide along beam guideway.
Described control structure comprises stepper motor, controller and host computer,
Described stepper motor connecting cross beam guide rail, vertical guide rail and connect carving by encoder, utilize controller control step motor to control the motion of beam guideway and vertical guide rail,
Described controller is connected with laser head and host computer,
Described host computer is connected with industrial camera.
Described industrial camera is line-scan digital camera, is connected with host computer by Camera Link interface.
Described cellular board is provided with the roller bearing driving carving to roll.
Described host computer is built-in with image pick-up card and data acquisition card, industrial camera outputs signal by bus transfer to host computer internal memory or video memory by described image pick-up card, described data acquisition card is connected with encoder and obtains rotary speed information, this speed is converted to the corresponding scan frequency of line-scan digital camera further, utilize frequency of signal generator drive wire array camera, realize scanning the real-time synchronization of roller bearing.Ensure that the scanning pitch sum of line-scan digital camera collection image within the unit interval is identical with the actual distance turned over of roller bearing.
For some large-scale workpieces, due to the restriction of viewing field of camera, once photo taking cannot obtain complete image information, camera can be made on guide rail along orbiting motion, automatically gather piece image every a segment distance, then image mosaic is carried out to the image collected, form a complete picture.
After obtaining original image, by now conventional image procossing mode, extract the circumference of image, generate contour vector figure, import the motion control instruction that engraving machine control software design is processed into laser head, engraving machine performs control instruction, the corresponding pattern of carve.Complete the real-time engraving to column.
Compared with prior art, the present invention has the following advantages:
1, adopt line sweep industrial camera, object is lined by line scan, more accurate original image can be obtained.
2, use image mosaic technology, breach the restriction of camera to breadth.
3, by existing laser engraving machine and whirligig, improvement cost is low.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 is the movement locus of industrial camera.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the present invention is described in detail.
A kind of laser engraving system being furnished with line-scan digital camera, its structure as shown in Figure 1, comprise the cellular board 1 being positioned at bottom, drive the roller bearing 2 that carving 3 rolls, be positioned at the beam guideway 4 being used for controlling laser head 6 and industrial camera 7 above cellular board 1 and moving in the X-axis direction, be positioned at beam guideway 4 left and right sides to be used for controlling the vertical guide rail 52 that moves in the Y-axis direction of beam guideway 4 and vertical guide rail 54, be arranged on the laser head 6 on beam guideway 4 and industrial camera 7, the controller 8 be connected with each stepper motor, wherein, stepper motor 92 and stepper motor 94 drag guide rail respectively at X, Y both direction is moved, stepper motor 96 drags the rotation of roller bearing, encoder 10 is connected with roller bearing 2 by shaft coupling, host computer 11 to be connected with industrial camera 7 by Camera Link interface and to carry out IMAQ, image procossing also sends control instruction to engraving machine, the industrial camera 7 used is line-scan digital camera.
Using method comprises the following steps:
Step 1, native system workbench, on cellular board 1, control the high and low position of cellular board with leading screw.Rotating mechanism is put on cellular board 1, makes the distance of carving and laser head on roller bearing in suitable scope by the height of leading screw adjustment guipure.
Step 2, be increment type by encoder 10, often rotate a circle, encoder can provide the pulse of some, can obtain according to the step-by-step counting in the unit interval speed that roller bearing rotates.Suppose that the output pulse frequency of encoder is f
0, roller bearing diameter is D, and velocity of rotation is v, and the line frequency required for camera scanning is f, and the actual size of image pixel dimensions (scanning pitch) corresponding object is d, and the encoder pulse number of a week is C.
Reel speed:
v＝f×d (1)
Roller bearing girth:
L＝π×D (2)
Roller bearing rotates a circle required time:
t＝L/v (3)
Angle calculation from encoder pulse:
t＝C/f
0(4)
Obtain f and f
0between relation:
After obtaining the corresponding scan frequency of line-scan digital camera, utilize frequency of signal generator drive wire array camera, realize scanning the real-time synchronization of roller bearing.
After the scan frequency of step 3, industrial camera 7 and roller bearing speed sync, control industrial camera 7 pairs of carving 3 and carry out synchronous scanning, after scanning one circle, the movement locus motion of camera according to Fig. 2, in each digital section, scan a circle respectively gather piece image, and output signal to be transferred in computer by image pick-up card and to preserve.
Step 4, image mosaic is carried out to the image collected, propose a kind of image split-joint method of distinguished point based.The extraction that the method adopts the SIFT algorithm having a robustness for yardstick to carry out characteristic point with mate, and the coupling accuracy of characteristic point is improved by the method that guided complementary matching and ballot are filtered, sane RANSAC algorithm is used to obtain the initial value of inter-image transformations matrix H and use LM non-linear iterative refining H, the suture of final utilization weighted average blending algorithm removal of images stitching portion, realizes the high-quality splicing of image.
Step 5, the image importing CorelDRAW software that will have spliced, extract the circumference of image, generate contour vector figure, import the motion control instruction that engraving machine control software design is processed into laser head.Arrange manufacturing parameter, ensure that engraving machine runs unobstructed, engraving machine performs control instruction, the corresponding pattern of carve.
By a series of IMAQ, image procossing, laser engraving process, can carve in real time a certain column fast and accurately, efficiency is higher.
Claims (8)
1. be furnished with a laser engraving system for line-scan digital camera, it is characterized in that, comprise
Laser head,
Industrial camera,
Place the rotating mechanism of laser head and industrial camera,
Control the controlling organization of laser head, industrial camera and rotating mechanism movement locus,
Place the cellular board of carving.
2. a kind of laser engraving system being furnished with line-scan digital camera according to claim 1, is characterized in that, described rotating mechanism comprises beam guideway and is arranged on the vertical guide rail of the perpendicular connection in beam guideway two ends.
3. a kind of laser engraving system being furnished with line-scan digital camera according to claim 2, it is characterized in that, described laser head and industrial camera are mounted on beam guideway, and slide along beam guideway.
4. a kind of laser engraving system being furnished with line-scan digital camera according to claim 2, it is characterized in that, described control structure comprises stepper motor, controller and host computer,
Described stepper motor connecting cross beam guide rail, vertical guide rail and connect carving by encoder, utilize controller control step motor to control the motion of beam guideway and vertical guide rail,
Described controller is connected with laser head and host computer,
Described host computer is connected with industrial camera.
5. a kind of laser engraving system being furnished with line-scan digital camera according to claim 4, is characterized in that, described industrial camera is line-scan digital camera, is connected with host computer by Camera Link interface.
6. a kind of laser engraving system being furnished with line-scan digital camera according to claim 4, it is characterized in that, described host computer is built-in with image pick-up card and data acquisition card, described image pick-up card by industrial camera output signal by bus transfer to host computer internal memory or video memory, described data acquisition card is connected with encoder and obtains rotary speed information.
7. a kind of laser engraving system being furnished with line-scan digital camera according to claim 4, is characterized in that, described data acquisition card gathers rotating speed and controls industrial camera and carries out synchronous real time scan with laser head to the carving that cellular board is placed.
8. a kind of laser engraving system being furnished with line-scan digital camera according to claim 1, is characterized in that, described cellular board is provided with the roller bearing driving carving to roll.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510235941.8A CN104827189B (en) | 2015-05-11 | 2015-05-11 | A kind of laser engraving system equipped with line-scan digital camera |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510235941.8A CN104827189B (en) | 2015-05-11 | 2015-05-11 | A kind of laser engraving system equipped with line-scan digital camera |
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| CN104827189A true CN104827189A (en) | 2015-08-12 |
| CN104827189B CN104827189B (en) | 2017-09-05 |
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Cited By (6)
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|---|---|---|---|---|
| CN105562935A (en) * | 2015-12-14 | 2016-05-11 | 周韵贤 | Board carving machine |
| CN105856853A (en) * | 2016-03-30 | 2016-08-17 | 苏州恩欧西智能科技有限公司 | Laser engraving machine |
| CN106181065A (en) * | 2016-08-22 | 2016-12-07 | 首都师范大学 | A kind of portable laser engraving machine and using method |
| CN106407495A (en) * | 2016-05-10 | 2017-02-15 | 浙江鑫达电梯有限公司 | Copper plate pattern generation system of elevator car |
| CN107344267A (en) * | 2017-07-17 | 2017-11-14 | 中山瑞科新能源有限公司 | A kind of solar panel laser scribing device |
| CN110430367A (en) * | 2019-09-29 | 2019-11-08 | 征图新视(江苏)科技股份有限公司 | A kind of pantostrat stacked image-pickup method of great Ye crops sorting |
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| CN204700440U (en) * | 2015-05-11 | 2015-10-14 | 上海工程技术大学 | A kind of laser engraving system being furnished with line-scan digital camera |
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Patent Citations (6)
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| US20030057194A1 (en) * | 2001-09-24 | 2003-03-27 | Fidalgo Diamantino Manuel | Process for laser-cutting parts and removing flashing |
| EP1342527A1 (en) * | 2002-03-01 | 2003-09-10 | Koike Sanso Kogyo Co., Ltd | Cutting apparatus |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105562935A (en) * | 2015-12-14 | 2016-05-11 | 周韵贤 | Board carving machine |
| CN105562935B (en) * | 2015-12-14 | 2017-07-11 | 广东普瑞凡厨卫科技有限公司 | A kind of plank engraving machine |
| CN105856853A (en) * | 2016-03-30 | 2016-08-17 | 苏州恩欧西智能科技有限公司 | Laser engraving machine |
| CN106407495A (en) * | 2016-05-10 | 2017-02-15 | 浙江鑫达电梯有限公司 | Copper plate pattern generation system of elevator car |
| CN106181065A (en) * | 2016-08-22 | 2016-12-07 | 首都师范大学 | A kind of portable laser engraving machine and using method |
| CN106181065B (en) * | 2016-08-22 | 2017-09-15 | 首都师范大学 | A kind of portable laser engraving machine and application method |
| CN107344267A (en) * | 2017-07-17 | 2017-11-14 | 中山瑞科新能源有限公司 | A kind of solar panel laser scribing device |
| CN110430367A (en) * | 2019-09-29 | 2019-11-08 | 征图新视(江苏)科技股份有限公司 | A kind of pantostrat stacked image-pickup method of great Ye crops sorting |
| CN110430367B (en) * | 2019-09-29 | 2019-12-27 | 征图新视(江苏)科技股份有限公司 | Continuous stacking type image acquisition method for sorting large-leaf crops |
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| CN104827189B (en) | 2017-09-05 |
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