CN108444401A - Bearing slender hole diameter series measuring device based on vision - Google Patents
Bearing slender hole diameter series measuring device based on vision Download PDFInfo
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- CN108444401A CN108444401A CN201810384495.0A CN201810384495A CN108444401A CN 108444401 A CN108444401 A CN 108444401A CN 201810384495 A CN201810384495 A CN 201810384495A CN 108444401 A CN108444401 A CN 108444401A
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- Prior art keywords
- camera
- objective table
- light source
- bearing
- object stage
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/08—Measuring arrangements characterised by the use of optical techniques for measuring diameters
- G01B11/12—Measuring arrangements characterised by the use of optical techniques for measuring diameters internal diameters
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Length Measuring Devices By Optical Means (AREA)
Abstract
The invention provides a bearing slender hole diameter series measuring device based on vision, which comprises an objective table, an objective table water inlet, a graduated scale, a lower light source, a camera support, a camera, a part clamp, an inner water outlet, an upper light source, a bottom end face and a cross cursor, wherein the objective table is provided with a water inlet; the bearing long and thin aperture series measurement method based on the vision is characterized in that an object stage water inlet is formed in one side of the object stage, a graduated scale is arranged on the outer wall of the object stage, a lower light source is arranged on the lower surface of the object stage, a part clamp is arranged on the object stage, an inner water outlet is formed in the bottom of the inner surface of the object stage, a camera and an upper light source are fixed to one end of a camera support, a cross cursor is arranged on the bottom surface of the object stage and is opposite to the camera, and the bearing long. The invention has the beneficial effect that the aperture measurement process is simple, accurate and convenient through the water surface imaging at different heights.
Description
Technical field
The invention belongs to radiographic measurement field, the espespecially elongated aperture measurement series device of the bearing of view-based access control model and its side
Method.
Background technology
Bearing is mechanized equipment indispensability part, and the precision controlling of the bearing aperture quality of assembly directly determines that machine is set
Standby using effect and service life, therefore bearing aperture measurement is particularly important.Aperture measurement device structure is multiple in the prior art
It is miscellaneous, it is inconvenient for use, or even be unable to seriation and measure elongated aperture.
Invention content
Based on the problem in above-mentioned background, the object of the present invention is to provide a kind of elongated apertures of the bearing of view-based access control model
Measurement series, simple in structure, easy to use, accuracy of reading serial aperture measurement device.
The technical scheme is that：The elongated aperture measurement series device of bearing of view-based access control model, including objective table, loading
Platform water inlet, graduated scale, lower light source, camera bracket, camera, part clamp, upper light source, tracking cross；
The objective table side has objective table water inlet, objective table outer wall to have graduated scale, objective table lower surface to have lower light source,
There are part clamp, the objective table inner surface bottom wall to have interior water outlet on objective table, described camera bracket one end, which is fixed with, to be taken the photograph
As head and upper light source.
Further, the surrounding of the camera has multiple upper light sources being evenly arranged.Part may be the stainless steel of white,
It is also likely to be the iron of black, therefore there are two light sources：Upper light source, lower light source.Light source, which rises, increases the water surface and aperture inner wall contrast
Effect.
Further, objective table or the different part fixed forms of two kinds of part clamp can be used in part fixation.Part internal diameter
Measuring basis can there are two：Cylinder and bottom end face on the outside of part, are pressed from both sides when using mixed lateral column face as measuring basis using part
Tool then uses objective table when using bottom end face as measuring basis.
Further, there is tracking cross in the place of objective table bottom surface face camera, the optical axis direction for correcting camera.
After correction, tracking cross should be imaged on the picture centre of camera.
Further, camera view angle theta is determined from the part column that part to be measured to length D and internal diameter R, θ >=3arctang
(R/2D), ensure that the friendship of the water surface and inner cylinder cuts circle positioned at image at center extrorse 2/3, i.e. the unidirectional resolution ratio of camera
For r, measurement accuracy is R/ (2r/3).
The present invention also provides the methods of the elongated aperture measurement series of the bearing of view-based access control model, include the following steps：
Step S1：Before water inlet, after part is clamped, camera first on lower light source tracking cross and interior water outlet at
Picture, tracking cross should be imaged on the picture centre of camera, and the imaging of interior water outlet should be the circle that certain determines size；
If tracking cross image space not the picture centre of camera or imaging be not round, finely tune camera bracket or
The position of light source makes the position of tracking cross be imaged on the picture centre of camera and is imaged as justifying under person.
Step S2：Camera is imaged mouth under part, to correct part column to the angle σ between camera optical axis direction.
If part column is not 0 to inclination angle σ, aperture imaging should be oval, and elliptical major diameter and minor axis are respectively RIt is longAnd RIt is short.According to three
Spatial relation is tieed up, according to RIt is longAnd RIt is shortProportionate relationship, it may be determined that go out part column to the angle σ between camera optical axis direction.
Fine tuning part clamp makes the imaging of mouth under part be become round by ellipse.
Step S3：It slowly intakes to objective table water inlet, light source and camera is opened after water surface calmness, shoot picture.
Detect water surface edge.Water surface edge may be circle, and circular inner diameter is exactly part internal diameter；May also be ellipse, ellipse has
Major diameter RIt is longWith minor axis RIt is short, minor axis RIt is shortIt is exactly part internal diameter.
Step S4：It controls the water surface from low to high, repeats step S3, obtain several pictures, one from top to bottom can be measured
Series of inner diameter R.
The invention has the advantages and positive effects that：Acquisition system structure is mainly formed by camera bracket and objective table
Simply, it is imaged by the different height water surface, makes inside diameter measurement process simply, accurately, conveniently.
Description of the drawings
Fig. 1 is the overall structure diagram of the present invention.
Fig. 2 is the definition graph at the specific measurement angle of the present invention.
Fig. 3 is the imaging schematic diagram of method of the present invention.
In figure：
1. objective table water inlet 2. graduated scale, 3. times light sources
4. light source on 5. camera 6. of camera bracket
8. part clamp of water outlet, 9. objective table in 7.
10. mouth 12, tracking cross under 11. part of bottom end face
13. part column is to 14, part
Specific implementation mode
As shown in Figs. 1-3, the technical scheme is that：A kind of elongated aperture measurement series dress of the bearing of view-based access control model
Set, including objective table 9, objective table water inlet 1, graduated scale 2, lower light source 3, camera bracket 4, camera 5, part clamp 8, on
Light source 6, tracking cross 12；
Under 9 side of the objective table has objective table water inlet 1,9 outer wall of objective table to have graduated scale 2,9 lower surface of objective table to have
Light source 3 has part clamp 8,9 inner surface bottom of the objective table to have interior water outlet 7, the camera bracket 4 one on objective table 9
End is fixed with camera 5 and upper light source 6.
In the present embodiment, the surrounding of the camera 5 has multiple upper light sources 6 being evenly arranged.Part can be white
Stainless steel can also be the iron of black, therefore there are two light sources：Upper light source 6, lower light source 3.Light source, which rises, to be increased in the water surface and aperture
The effect of wall contrast.
In the present embodiment, objective table 9 or the different part fixed forms of 8 two kinds of part clamp can be used in the fixation of part 14.Zero
The measuring basis of part internal diameter can there are two：Cylinder and bottom end face 10 on the outside of part, when using mixed lateral column face as measuring basis
Using part clamp 8, objective table 9 is then used when being measuring basis with bottom end face 10.
In the present embodiment, there is tracking cross 12 in the place of 9 bottom surface face camera 5 of objective table, for correcting camera
Optical axis direction.After correction, tracking cross 12 should be imaged on the picture centre of camera 5.
In the present embodiment, camera view angle theta is determined from the part column that part to be measured to length D and internal diameter R, θ >=
3arctang (R/2D) ensures that the friendship of the water surface and inner cylinder cuts the round image that is located at center extrorse 2/3.Wherein camera
Unidirectional resolution ratio is r, and measurement accuracy is R/ (2r/3).
Shown in Fig. 3, a series of figure of uplink is the relative position relation of camera, interior water outlet, lower light source, part, the water surface；
The a series of figure of downlink is the shape and relative position of interior water outlet, part, the water surface in image when demarcating and measuring.And it is upper and lower
Figure corresponds to one group, from left to right：(1) there was only device, do not put part also；(2) it is well placed part, is not intake also；(3) into
Water, part axial are overlapped with camera optical axis；(4) it intakes, part axial is misaligned with camera optical axis, there is angle；(5) it intakes, zero
Part is axial parallel but misaligned with camera optical axis, there is spacing.
The present invention also provides the methods of the elongated aperture measurement series of the bearing of view-based access control model, include the following steps：
Step S1：Before water inlet, after part is clamped, camera 5 first on lower light source 3 tracking cross 12 and interior water outlet
Mouth 7 is imaged, and tracking cross 12 should be imaged on the picture centre of camera 5, and the imaging of interior water outlet 7 should be that certain determines size
Circle；
If 12 image space of tracking cross is not round in the picture centre of camera 5 or imaging, camera branch is finely tuned
The position of frame 4 or lower light source 3 makes the position of tracking cross 12 be imaged on the picture centre of camera 5 and is imaged as justifying.
Step S2：Camera 5 is imaged mouth under part 11, to correct part column between 13 and 5 optical axis direction of camera
Angle σ.If part column is not 0 to 13 inclination angle σ, aperture imaging should be oval, and elliptical major diameter and minor axis are respectively RIt is longWith
RIt is short.According to 3 D stereo relationship, according to RIt is longAnd RIt is shortProportionate relationship, it may be determined that go out part column to 13 and camera optical axis direction
Between angle σ.Fine tuning part clamp makes the imaging of mouth under part be become round by ellipse.
Step S3：It slowly intakes to 9 water inlet of objective table, light source and camera is opened after water surface calmness, shoot picture.
Detect water surface edge.Water surface edge may be circle, and circular inner diameter is exactly part internal diameter；May also be ellipse, ellipse has
Major diameter RIt is longWith minor axis RIt is short, minor axis RIt is shortIt is exactly part internal diameter.
Step S4：It controls the water surface from low to high, repeats step S3, obtain several pictures, one from top to bottom can be measured
Series of inner diameter R.
One embodiment of the present invention has been described in detail above, but the content be only the present invention preferable implementation
Example should not be construed as limiting the practical range of the present invention.It is all according to all the changes and improvements made by the present patent application range
Deng should all still fall within the scope of the patent of the present invention.
Claims (4)
1. the elongated aperture measurement series device of the bearing of view-based access control model, it is characterised in that：Including objective table, objective table water inlet,
Graduated scale, lower light source, camera bracket, camera, part clamp, upper light source, tracking cross；There is loading in the objective table side
Platform water inlet, objective table outer wall have graduated scale, objective table lower surface to have lower light source, there is part clamp, the loading on objective table
Platform inner surface bottom has interior water outlet, described camera bracket one end to be fixed with camera and upper light source；The objective table bottom surface
There is tracking cross at face camera.
2. the elongated aperture measurement series device of the bearing of view-based access control model according to claim 1, it is characterised in that：It is described to take the photograph
As the surrounding of head has multiple upper light sources being evenly arranged.
3. the elongated aperture measurement series device of the bearing of view-based access control model according to claim 1, it is characterised in that：Part is solid
Surely objective table or the different part fixed forms of two kinds of part clamp can be used.
4. the elongated aperture measurement series device of the bearing of view-based access control model according to claim 1, it is characterised in that：Camera
View angle theta is determined that θ >=3arctang (R/2D) ensures the water surface and inner prop from the part column that part to be measured to length D and internal diameter R
The friendship in face cuts circle and is located at image at center extrorse 2/3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810384495.0A CN108444401B (en) | 2018-04-27 | 2018-04-27 | Bearing slender hole diameter series measuring device based on vision |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810384495.0A CN108444401B (en) | 2018-04-27 | 2018-04-27 | Bearing slender hole diameter series measuring device based on vision |
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| CN108444401A true CN108444401A (en) | 2018-08-24 |
| CN108444401B CN108444401B (en) | 2022-03-04 |
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| CN201810384495.0A Active CN108444401B (en) | 2018-04-27 | 2018-04-27 | Bearing slender hole diameter series measuring device based on vision |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112858329A (en) * | 2020-12-31 | 2021-05-28 | 慈溪迅蕾轴承有限公司 | Image detection method for bearing deformed ring |
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| CN101435763A (en) * | 2008-12-23 | 2009-05-20 | 南京工业大学 | Method for measuring diameter distribution of porous material surface orifice |
| WO2014170000A1 (en) * | 2013-04-20 | 2014-10-23 | Jenoptik Industrial Metrology Germany Gmbh | Cylinder bore measuring apparatus |
| CN103307989A (en) * | 2013-05-28 | 2013-09-18 | 江苏大学 | Device and method for measuring internal and external diameters of transparent glass bottleneck based on machine vision |
| CN204988178U (en) * | 2015-06-30 | 2016-01-20 | 歌尔声学股份有限公司 | Image measuring apparatus |
| CN105136648A (en) * | 2015-10-19 | 2015-12-09 | 江西理工大学 | Effective soil pore diameter and distribution parameter testing method |
| CN106247961A (en) * | 2016-10-18 | 2016-12-21 | 淮阴师范学院 | The precision measurement system of a kind of bore inner diameter and method |
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| CN112858329A (en) * | 2020-12-31 | 2021-05-28 | 慈溪迅蕾轴承有限公司 | Image detection method for bearing deformed ring |
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| CN108444401B (en) | 2022-03-04 |
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Effective date of registration: 20220520 Address after: 230000 Room 203, building 2, phase I, e-commerce Park, Jinggang Road, Shushan Economic Development Zone, Hefei City, Anhui Province Patentee after: Hefei Jiuzhou Longteng scientific and technological achievement transformation Co.,Ltd. Address before: 325000 building C1, marine science and Technology Pioneer Park, Longwan District, Wenzhou City, Zhejiang Province Patentee before: INSTITUTE OF LASER AND OPTOELECTRONICS INTELLIGENT MANUFACTURING, WENZHOU University |
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Effective date of registration: 20230413 Address after: 473200 No. 8, new energy gathering area, Fangcheng County, Nanyang City, Henan Province Patentee after: Henan Lianzhou Industrial Co.,Ltd. Address before: 230000 Room 203, building 2, phase I, e-commerce Park, Jinggang Road, Shushan Economic Development Zone, Hefei City, Anhui Province Patentee before: Hefei Jiuzhou Longteng scientific and technological achievement transformation Co.,Ltd. |