CN210570542U - Experimental device for measuring fog cone angle based on image - Google Patents
Experimental device for measuring fog cone angle based on image Download PDFInfo
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- CN210570542U CN210570542U CN201921726125.7U CN201921726125U CN210570542U CN 210570542 U CN210570542 U CN 210570542U CN 201921726125 U CN201921726125 U CN 201921726125U CN 210570542 U CN210570542 U CN 210570542U
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- 239000007921 spray Substances 0.000 claims abstract description 62
- 238000005259 measurement Methods 0.000 claims abstract description 13
- 239000000725 suspension Substances 0.000 claims description 4
- 238000005507 spraying Methods 0.000 abstract description 21
- 238000005516 engineering process Methods 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 14
- 239000011248 coating agent Substances 0.000 description 9
- 238000000576 coating method Methods 0.000 description 9
- 238000002474 experimental method Methods 0.000 description 4
- 238000012545 processing Methods 0.000 description 3
- 238000000605 extraction Methods 0.000 description 2
- 239000003973 paint Substances 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
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Abstract
The utility model relates to a spraying technology technical field especially relates to an experimental apparatus based on image measurement fog cone angle, including camera, light source, spray gun and revolving stage, camera and light source link to each other with the revolving stage through the connecting rod respectively, and the axis of the light of light source and the camera lens of camera is parallel, the spray gun is located the revolving stage top, the nozzle of spray gun and the axis coincidence of revolving stage, and the revolving stage is along axle center clockwise or anticlockwise rotation. Through this device, can effectively solve the device structure huge, the not convenient to remove problem to the operation is simpler.
Description
Technical Field
The utility model relates to a spraying technology technical field especially relates to an experimental apparatus based on image measurement fog cone angle.
Background
In the field of spraying process research, the measurement of the spraying shape has important practical significance for the spraying process research. The spraying shape refers to a coating shape formed after the coating is cured after the coating is sprayed on the surface of a workpiece for a certain time under the static condition of a spray gun. The spraying shape is usually elliptical, the length of the long axis of the spraying shape represents the spraying amplitude and is the basis of the spraying track planning and the lap joint distance design; the length of the short axis is often easily ignored, but the length of the short axis is also of great significance for modeling the distribution of the coating thickness of the spray coating.
The measurement of the spray shape generally adopts the steps that the coating is sprayed on the surface of a workpiece, and after the coating is cured to form a coating, the length of the long axis and the length of the short axis of the elliptical coating are directly measured by a measuring tool. The method has the advantages of high precision and simplicity, but has the disadvantages of low efficiency, high cost and unsuitability for large-batch experiments because the workpiece to be sprayed needs to be prepared.
In the prior art, a chinese utility model patent document with publication number CN202304805U and publication date of 2012, 07, 04 is proposed to solve the above existing technical problems, and the technical scheme disclosed in the patent document is as follows: a spray cone angle measurement device comprising: the device comprises a spray chamber, a camera and a spotlight, wherein a nozzle is arranged in the spray chamber; the camera takes a picture of the spray cone angle of the nozzle; the spot light is installed on the side wall of the spraying chamber.
In the actual use process, the following problems can occur in the technical scheme:
(1) the file adopts a closed structure, the structure is very favorable for preventing paint from splashing to the environment, and the structure realizes multi-angle shooting of a fog cone through a rotary spray gun, so that the measuring device has the advantages of excessively large structure volume, more complex structure, inconvenience in movement and high equipment cost. Meanwhile, the use principle of the structure is that different measuring surfaces of the nozzle are selected, so that a plurality of groups of cone angle data are recorded, the fog cone angle can be measured, and the operation is troublesome.
(2) When experiments of different spray guns need to be carried out, the spray guns need to be replaced manually, for example, in the occasion of robot spraying, the spray guns need to be installed on a mechanical arm, and when the measuring device is used, the spray guns need to be detached from the mechanical arm and installed again, so that the operation is complex.
(3) A plurality of light sources are arranged, and the light sources are easy to influence each other.
Disclosure of Invention
For solving the technical problem, the utility model provides an experimental apparatus based on image measurement fog cone angle can effectively solve the problem that the device structure is huge, is not convenient for remove to the operation is simpler.
The utility model discloses a realize through adopting following technical scheme:
the utility model provides an experimental apparatus based on image measurement fog cone angle, includes camera and light source, its characterized in that: still include spray gun and revolving stage, camera and light source link to each other with the revolving stage through the connecting rod respectively, and the light of light source is parallel with the axis of the camera lens, the spray gun is located the revolving stage top, and the nozzle of spray gun coincides with the axis of revolving stage, and the revolving stage is along axle center clockwise or anticlockwise rotation.
The rotary table is provided with angle scales.
The rotary table further comprises a driving piece, and the driving piece is used for driving the rotary table to rotate.
The driving piece is a stepping motor or a servo motor.
The diameter of the rotary table is 0.8-1.3 m.
The connecting rod is a lifting rod.
Still include the silence wheel, the silence wheel is located the experimental apparatus bottom.
And the surface of the mute wheel is provided with a brake pad.
The spray gun is lifted in the axis direction of the rotary table through a mechanical arm or a suspension rod.
Compared with the prior art, the beneficial effects of the utility model are that:
1. the utility model discloses use the revolving stage to rotate camera and light source to at the rotation in-process, the position that keeps the nozzle can measure the major and minor axis of fog awl with the axis coincidence of revolving stage, rather than utilizing two cameras and two light sources to measure the major and minor axis of fog awl respectively, has avoided influencing mutually between the light source and the different experimental error that bring of different camera calibration errors, practices thrift equipment cost simultaneously.
The utility model discloses simple structure, volume weight is little, leads to self to remove conveniently, and it is also more convenient when utilizing external facilities to remove, for example place it just can freely remove on the shallow. Because this structural feature makes the utility model discloses the convenience is used in the occasion of difference, for example in the occasion of robot spraying, need not dismantle the spray gun from the mechanical arm and get off the reinstallation, only need remove the below of spray gun with this experimental apparatus, and the nozzle that keeps the spray gun can carry out fog cone angle measurement with the axis coincidence of revolving stage, easy operation.
2. The angle scales are arranged on the rotary table, so that the rotation angle can be known clearly when the rotary table is rotated, and long and short axis pictures can be shot by rotating the rotary table conveniently.
3. Still include the driving piece, the driving piece is used for driving the revolving stage and rotates, replaces artifical revolving stage that rotates, and pivoted angle is more accurate.
4. The driving piece is a stepping motor or a servo motor, the structure is prior, the technology is mature, and the manufacturing cost is low.
5. The diameter of the rotary table is 0.8-1.3 m, the overlarge diameter of the rotary table easily causes insufficient light when images are shot, the undersize diameter easily causes the camera to be polluted by atomized paint, and the range is the most suitable range.
6. The connecting rod is the lifter, is convenient for adjust the height of camera and light source, and the axis that firstly keeps the light of light source and the camera lens of camera is parallel, secondly in order to make and keep the height that is fit for with the nozzle, the camera of being convenient for takes out more clear photos for this experimental apparatus also can be applicable to more occasions.
7. The bottom of the experimental device is provided with the mute wheel, so that the experimental device is convenient to move.
8. Silence wheel surface mounting has the brake block, avoids experimental apparatus to remove when measuring, leads to measuring inaccurate.
9. The spray gun goes up and down in revolving stage axis direction through arm or jib, and it is convenient to go up and down for the spray gun keeps suitable height with the camera plane, takes out clearer photo.
Drawings
The invention will be described in further detail with reference to the following description taken in conjunction with the accompanying drawings and detailed description, in which:
fig. 1 is a schematic structural view of the present invention;
the labels in the figure are:
1. camera, 2, light source, 3, spray gun, 4, revolving stage, 5, driving piece, 6, connecting rod, 7, arm.
Detailed Description
Example 1
As the utility model discloses basic embodiment, the utility model discloses an experimental apparatus based on image measurement fog cone angle, including camera 1, light source 2, spray gun 3 and revolving stage 4, camera 1 and light source 2 link to each other with revolving stage 4 through connecting rod 6 respectively, and the axis of the light of light source 2 and camera 1's camera lens is parallel. The spray gun 3 is positioned above the rotary table 4, the nozzle of the spray gun 3 is overlapped with the axis of the rotary table 4, and the rotary table 4 rotates clockwise or anticlockwise along the axis.
The spray gun 3 may be a spray gun 3 in a region other than the experimental apparatus, and is not connected to the turntable 4, the camera 1, the light source 2, and the like, and when in use, the nozzle of the spray gun 3 is kept to be aligned with the axis of the turntable 4.
Or the spray gun 3 can also be fixed on a device at the rest position of the experimental device, for example, a telescopic rod is arranged at the side of the experimental device, a hook is arranged on the support rod, and the spray gun 3 is fixed on the hook. When using, can use this spray gun 3 to carry out the spraying, but when the experiment of different spray guns 3 is carried out to needs, can take off experimental apparatus's spray gun 3 from the couple itself, with experimental apparatus remove to other spray guns 3 below can, need not frequently change spray gun 3.
Example 2
As a preferred embodiment of the utility model, the utility model discloses an experimental apparatus based on image measurement fog cone angle, including camera 1, light source 2, spray gun 3, revolving stage 4 and drive revolving stage 4 along axle center clockwise or anticlockwise pivoted driving piece 5. The drive member 5 may be a stepper motor.
The light source 2 can be a spotlight, the camera 1 and the light source 2 are respectively connected with the rotary table 4 through the connecting rod 6, the camera 1 and the light source 2 can be installed on the connecting rod 6 through guide rails, and the connecting rod 6 and the rotary table 4 can be installed through flanges. The light of the light source 2 is parallel to the axis of the lens of the camera 1, and the parallelism is determined by visual observation.
The spray gun 3 can be suspended above the turntable 4 by a boom, and the nozzle of the spray gun 3 coincides with the axis of the turntable 4.
The diameter of the rotary table 4 is 0.8m, and angle scales are arranged at the edge position of the rotary table 4.
When the device is used, the spray gun 3 is turned on to start spraying, the light source 2 and the camera 1 are turned on, the camera 1 is aligned to the surface where the long axis of the spray cone is located, the rotation angle of the rotary table 4 is adjusted, when the area of the light spot of the long axis shown in the picture of the camera 1 is the largest, the adjustment is stopped, and the current angle of the rotary table is remembered. The angle may be the angle corresponding to a stationary reference object next to the experimental apparatus. The spraying process parameters are adjusted, the camera 1 automatically shoots a long-axis picture, and after shooting, the picture is rotated by 90 degrees according to the angle of the rotary table 4 on the angle scale, for example, the angle corresponding to the stationary reference object is 45 degrees, at this time, the rotary table 4 is rotated clockwise, and the angle corresponding to the stationary reference object should be 315 degrees. And after the rotary table 4 stops, the camera 1 shoots a short-axis picture again, and after the short-axis picture is shot, the rotary table 4 rotates to the initial angle to finish shooting.
Example 3
As another preferred embodiment of the present invention, the present invention includes an experimental apparatus based on image measurement fog-cone angle, which includes a camera 1, a light source 2, a spray gun 3 and a rotary table 4. The camera 1 and the light source 2 are respectively connected with the rotary table 4 through a connecting rod 6, and the light of the light source 2 is parallel to the axis of the lens of the camera 1; the rotary table 4 rotates clockwise or anticlockwise along the axis; the spray gun 3 is positioned above the rotary table 4, a nozzle of the spray gun 3 is overlapped with the axis of the rotary table 4, and the spray gun 3 is lifted in the axis direction of the rotary table 4 through the mechanical arm 7 or the suspension rod.
The diameter of the turntable 4 is 1.3 m.
The connecting rod 6 is a lifting rod.
The bottom of experimental apparatus is equipped with the silence wheel, and silence wheel surface mounting has the brake block, can easily promote whole experimental apparatus, and can confirm whether fixed experimental apparatus according to the use scene.
Example 4
As the best mode of the present invention, referring to the attached drawing 1 of the specification, the present invention includes an experimental device based on image measurement of fog cone angle, including a camera 1, a light source 2, a turntable 4 and a driving member 5 for driving the turntable 4 to rotate clockwise or counterclockwise along the axis. The driving part 5 is a servo motor, and the driving form of the servo motor used by the rotary table 4 can be a manual operation driver panel or automatically controlled by controllers such as an upper computer and a PLC.
The camera 1 and the light source 2 are respectively connected with the rotary table 4 through a connecting rod 6, and the connecting rod 6 is a lifting rod. The camera 1, the light source 2 and the connecting rod 6 can be fixed through bolts, and the connecting rod 6 and the turntable 4 can also be fixed through bolts.
The light of the light source 2 is parallel to the axis of the lens of the camera 1; the rotary table 4 is positioned below the spray gun 3, the spray gun 3 is the spray gun 3 in other areas, and the camera 1, the light source 2 and the rotary table 4 are not connected at all. The spray gun 3 is lifted in the axial direction of the rotary table 4 through an external mechanical arm 7 or a suspension rod, and the axial line of the rotary table 4 is kept coincident with the nozzle of the spray gun 3 in the lifting process.
The diameter of the rotary table 4 is 1m, and the surface of the rotary table 4 is provided with angle scales.
The bottom of the experimental device is provided with a mute wheel. And the surface of the mute wheel is provided with a brake pad.
In the case of robot painting, the spray gun 3 is fixed to the robot arm 7 and is hard to freely rotate. When the device is used, the experimental device is pushed to the lower part of the spray gun 3, the axis of the spray nozzle and the axis of the rotary table 4 are overlapped, and the light of the light source 2 is parallel to the axis of the lens of the camera 1. The spray gun 3 is turned on to start spraying, the light source 2 and the camera 1 are turned on, the camera 1 is aligned to the surface where the long axis of the spray cone is located, the picture of the camera 1 can be monitored in real time on the upper computer, the rotating angle of the rotary table 4 is adjusted, when the area of the light spot of the displayed long axis is the largest, adjustment is stopped, and the angle of the current servo motor is remembered. And adjusting the spraying process parameters, automatically shooting a long-axis picture by the camera 1, rotating the turntable 4 by 90 degrees after shooting, wherein the direction can be random, shooting a short-axis picture by the camera 1 again after the turntable 4 stops, and rotating the turntable 4 to the initial angle after shooting.
After the long and short axis pictures of the fog cone of a set of process parameters are shot, the spray gun 3 is closed for 5-10s, and then the next set of process parameters is sprayed, so that the coating fog interference image which can be generated in the previous experiment can be eliminated.
All experimental processes can be automatically controlled and completed by an upper computer, and the process is as follows: spraying on → camera 1 takes a long axis picture → turntable 4 rotates → camera 1 takes a short axis picture → spraying off → turntable 4 rotates back to the initial position.
When all the pictures are shot, the shot pictures need to be subjected to image processing to obtain the fog cone angles of the long axis and the short axis, and different methods can be adopted for the image processing. Such as:
(1) selecting a proper threshold value to carry out binarization processing on the image;
(2) adopting an edge extraction operator to carry out edge extraction on the binarized image;
(3) reserving boundary points close to the nozzle area, wherein the longitudinal length of the selected area is 30 pixels, the transverse length of the selected area is the transverse length of the whole image, and the rest parts of the picture are completely changed into black;
(4) and (3) respectively performing linear fitting of a least square method on the left part and the right part of the rest boundary points, and calculating an included angle by using the slopes of the two fitted linear lines to obtain the long-short axis fog cone angle of the spray fog cone.
In conclusion, after the ordinary skilled in the art reads the document of the present invention, the technical solution and technical idea of the present invention do not need creative mental labor and make other various corresponding transformation schemes, which all belong to the protection scope of the present invention.
Claims (9)
1. An experimental device based on image measurement fog cone angle, includes camera (1) and light source (2), its characterized in that: still include spray gun (3) and revolving stage (4), camera (1) and light source (2) link to each other with revolving stage (4) through connecting rod (6) respectively, and the light of light source (2) is parallel with the axis of the camera lens of camera (1), spray gun (3) are located revolving stage (4) top, and the nozzle of spray gun (3) coincides with the axis of revolving stage (4), and revolving stage (4) are along axle center clockwise or anticlockwise rotation.
2. The experimental device for measuring the fog cone angle based on the image as claimed in claim 1, wherein: the rotary table (4) is provided with angle scales.
3. The experimental device for measuring the fog cone angle based on the image as claimed in claim 2, is characterized in that: the rotary table further comprises a driving piece (5), and the driving piece (5) is used for driving the rotary table (4) to rotate.
4. The experimental device for measuring the fog cone angle based on the image as claimed in claim 3, wherein: the driving piece (5) is a stepping motor or a servo motor.
5. The experimental device for measuring the fog cone angle based on the image as claimed in claim 1 or 4, wherein: the diameter of the rotary table (4) is 0.8-1.3 m.
6. The experimental device for measuring the fog cone angle based on the image as claimed in claim 5, is characterized in that: the connecting rod (6) is a lifting rod.
7. The experimental device for measuring the fog cone angle based on the image as claimed in claim 6, wherein: still include the silence wheel, the silence wheel is located the experimental apparatus bottom.
8. The experimental device for measuring the fog cone angle based on the image as claimed in claim 7, wherein: and the surface of the mute wheel is provided with a brake pad.
9. The experimental device for measuring the fog cone angle based on the image as claimed in claim 8, wherein: the spray gun (3) is lifted in the axial direction of the rotary table (4) through a mechanical arm (7) or a suspension rod.
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| CN201921726125.7U CN210570542U (en) | 2019-10-15 | 2019-10-15 | Experimental device for measuring fog cone angle based on image |
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| CN201921726125.7U CN210570542U (en) | 2019-10-15 | 2019-10-15 | Experimental device for measuring fog cone angle based on image |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110672041A (en) * | 2019-10-15 | 2020-01-10 | 成都飞机工业（集团）有限责任公司 | Experimental device for measuring fog cone angle based on image |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110672041A (en) * | 2019-10-15 | 2020-01-10 | 成都飞机工业（集团）有限责任公司 | Experimental device for measuring fog cone angle based on image |
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