CN106645181A - Microscopic vision-based roller grinding surface defect detecting system - Google Patents
Microscopic vision-based roller grinding surface defect detecting system Download PDFInfo
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- CN106645181A CN106645181A CN201710104723.XA CN201710104723A CN106645181A CN 106645181 A CN106645181 A CN 106645181A CN 201710104723 A CN201710104723 A CN 201710104723A CN 106645181 A CN106645181 A CN 106645181A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/8806—Specially adapted optical and illumination features
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/8806—Specially adapted optical and illumination features
- G01N2021/8809—Adjustment for highlighting flaws
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/8806—Specially adapted optical and illumination features
- G01N2021/8822—Dark field detection
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- Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)
Abstract
The invention discloses a microscopic vision-based roller grinding surface defect detecting system. The microscopic vision-based roller grinding surface defect detecting system comprises an illumination module, a microscopic camera module and a data transmitting and processing module, wherein the illumination module comprises a light source and a lens assembly; light emitted by the light source is refracted by the lens assembly to form a first light path to be irradiated to a roller grinding surface; the microscopic camera module comprises a microscopic lens and a camera module; the first light path is subjected to specular reflection or diffuse reflection of the roller grinding surface to form a second light path; the second light path is focused by the microscopic lens and then is converted into image or video information by the camera module; and the data transmitting and processing module receives the image or video information through a data transmitting module, performs identification and processing on the image of the roller grinding surface and performs qualitative analysis and quantitative measurement on the defect of the roller grinding surface. According to the microscopic vision-based roller grinding surface defect detecting system provided by the invention, the defect of the roller grinding surface can be detected quickly and accurately, and the quality and the stability of the roller grinding surface are improved.
Description
Technical field
The present invention relates to grinding surface defects detection field, more particularly to a kind of roll dressing based on micro-vision
Surface defects detection system.
Background technology
Roller surface quality is a key factor of influence of rolled product quality, first grinding when roll is manufactured and is rolled
There is material impact during the reconditioning of system production.Roll dressing surface common deficiency has spiral lamination, twill, reticulate pattern, aberration, spot
Point, chatter mark, cut, burn etc..
The automation defect inspection method commonly used in roll grinding process at present has eddy current inspection, ultrasonic examination etc., this
A little methods of detection can realize the detection of the surface such as crackle sub-surface damage, but to surfaces such as perficial helical line, reticulate pattern, spots
Defect cannot be realized effectively measuring.For rear several defects at present still mainly by veteran workman by visually specific
Angle and suitable illumination condition under be observed identification, this observation procedure is high to the skill requirement of workman, the master of detection
The property seen is strong, and detection efficiency is relatively low with accuracy rate.Meanwhile, above-mentioned manual detection method can only qualitatively be observed and cannot be real
Now quantitative measurement, and because the subjectivity of naked-eye observation cannot form unified examination criteria, so as to drawbacks described above
Assessment receive serious restriction.Additionally, also tending in industrial practice using modes such as polishings to roll or rolled products table
Face is processed to strengthen Detection results, but to equally exist detection efficiency relatively low with accuracy rate for these processing methods, and cannot
Realize the defect of quantitative measurment.
Because the volume of roll is big with weight, grinding difficulty is high, and its grinding cycle is long, and the related operation of grinding process is also needed
Human and material resources that will be higher and time cost, affect big to Rolling Production.So as to develop one kind can realize spiral lamination, reticulate pattern,
The defects such as aberration, spot carry out qualitative analysis and quantitative measurment, and roll dressing surface defects detection system is to lifting roll dressing
Surface quality and stability have material impact, with urgent current demand and considerable potential application.
The content of the invention
It is contemplated that at least solving one of above-mentioned technical problem to a certain extent.
For this purpose, the present invention proposes a kind of roll dressing surface defects detection system based on micro-vision, should be based on micro-
The roll dressing surface defects detection system detectio efficiency of vision and accuracy rate are high.
According to embodiments of the present invention is included based on the roll dressing surface defects detection system of micro-vision：Illumination mould
Block, the lighting module includes light source and lens subassembly, the light that the light source is issued shape after lens subassembly refraction
The roll dressing surface is exposed into the first light path；Microimaging module, the microimaging module includes：Microlens and
Camera model, roll dressing surface specular reflections described in first light path Jing or diffusing reflection the second light path of formation, described second
Light path is converted into image or video information after being focused on by the microlens by the camera model；Data transfer and process mould
Block, the data transfer receives described image or video information with processing module by data transmission module, and the roll is ground
The image for cutting surface is identified and processes, so as to carry out qualitative analysis and quantitative measurment to the roll dressing surface defect.
Roll dressing surface defects detection system based on micro-vision according to embodiments of the present invention can be quickly and accurate
The defect on roll dressing surface really is detected, roll dressing surface quality and stability is effectively lifted.
In addition, the roll dressing surface defects detection system based on micro-vision according to embodiments of the present invention, can be with
With following additional technical characteristic：
According to one embodiment of present invention, first light path forms circular light spot or square on the roll dressing surface
Shape light belt.
According to one embodiment of present invention, the lens subassembly includes multiple lens, and multiple lens are along described the
Two optical path direction interval settings.
According to one embodiment of present invention, the light that the light source sends is white light or monochromatic light.
According to one embodiment of present invention, the data transmission module is that wired data transfer module or wireless data are passed
Defeated module.
According to one embodiment of present invention, first light path and the relatively described roll dressing surface of second light path
The centre normal of irradiation area be symmetrical arranged or asymmetric setting.
According to one embodiment of present invention, the central optical path of the central optical path of first light path and second light path
Angle be α.
According to one embodiment of present invention, the α scopes are 0-160 degree.
According to one embodiment of present invention, the lighting module and the microimaging module are located at the roll dressing
The same side on surface.
According to one embodiment of present invention, the lighting module and the microimaging module be in the horizontal direction and vertically
The position-adjustable in direction.
The additional aspect and advantage of the present invention will be set forth in part in the description, and partly will become from the following description
Obtain substantially, or recognized by the practice of the present invention.
Description of the drawings
The above-mentioned and/or additional aspect and advantage of the present invention will become from the description with reference to accompanying drawings below to embodiment
It is substantially and easy to understand, wherein：
Fig. 1 is the knot of the roll dressing surface defects detection system based on micro-vision according to an embodiment of the invention
Structure schematic diagram；
Fig. 2 is the roll dressing surface defects detection system based on micro-vision in accordance with another embodiment of the present invention
Structural representation.
Reference：
Lighting module 10；Light source 11；Lens subassembly 12；
Microimaging module 20；Microlens 21；Camera model 22；
Data transfer and processing module 30；
Roll 200.
Specific embodiment
Embodiments of the invention are described below in detail, the example of the embodiment is shown in the drawings, wherein from start to finish
Same or similar label represents same or similar element or the element with same or like function.Below with reference to attached
The embodiment of figure description is exemplary, it is intended to for explaining the present invention, and be not considered as limiting the invention.
The roll dressing surface defect based on micro-vision according to embodiments of the present invention is described referring to Fig. 1-Fig. 2 to examine
Examining system, the grinding skin defect detecting system of roll 200 can realize spiral lamination, reticulate pattern, the color to the grinding skin of roll 200
The defect such as difference and spot carries out qualitative analysis and quantitative measurment.
As depicted in figs. 1 and 2, substantially can be included based on the roll dressing surface defects detection system of micro-vision：According to
Bright module 10, microimaging module 20 and data transfer and processing module 30.
Specifically, lighting module 10 includes light source 11 and lens subassembly 12, and the light that light source 11 is issued is through lens subassembly
The first light path is formed after 12 refractions expose to the grinding skin of roll 200.Microimaging module 20 includes：Microlens 21 and camera
Module 22, the grinding skin of the first light path Jing roll 200 specularly or diffusely forms the second light path, and the second light path is by microscope
21 focus on after image or video information are converted into by camera model 22.
Data transfer receives image or video information with processing module 30 by data transmission module, and roll 200 is ground
The image on surface is identified and processes, so as to carry out qualitative analysis and quantitative measurment to the grinding skin defect of roll 200.
According to embodiments of the present invention is ground based on the roll dressing surface defects detection system of micro-vision to roll 200
Following process is generallyd include when surface defect is detected：It is first that the first light path after lens subassembly 12 is reflected is (parallel
Light) expose to the grinding skin of roll 200 so that and the grinding skin of roll 200 forms circular light spot or rectangular light band, to play raising
The effect of the grinding skin brightness of roll 200, the defects such as the spiral lamination of the grinding skin of roll 200, reticulate pattern, color spot and aberration are highlighted
Out, wherein, the light that light source 11 is issued is preferred with white light or monochromatic light, thus, it is possible to further by the grinding skin of roll 200
Defect to being displayed.
The second light path for being then passed through the transmitting of the grinding skin of roll 200 is gathered by microlens 21, through microlens 21
Focusing, amplify after image or video information are converted into by camera model 22, image or video information transmission to data transfer with
Processing module, is identified and is processed, so as to right with processing module 30 by data transfer to the image of the grinding skin of roll 200
The grinding skin defect of roll 200 carries out qualitative analysis and quantitative measurment.
That is, the defect of the grinding skin of roll 200 is recorded into image or video letter by microimaging module 20
Breath, can cause the feature of defect image to strengthen through the process of data transfer and processing module 30, and as needed to feature
Extracted, so that the grinding skin defect of roll 200 is able to effectively observe and measure.Compared to Traditional Man detection side
For method, the embodiment of the present invention forms defect image or video information, detection efficiency and standard by the record of microimaging module 20
Really rate is greatly improved, it is to avoid affected by the subjectivity and limitation of artificial naked-eye observation.
Roll dressing surface defects detection system based on micro-vision according to embodiments of the present invention can be quickly and accurate
The defect of the grinding skin of roll 200 really is detected, the grinding surface quality of roll 200 and stability is effectively lifted.
In some embodiments of the invention, as depicted in figs. 1 and 2, the grinding skin defect detecting system of roll 200 includes：
Lighting module 10, microimaging module 20 and data transfer and processing module 30.Wherein, image or video information are by there is line number
Be sent to data transfer and processing module 30 according to transport module, wired data transfer module can for network cable transmission, USB transmission,
The modes such as CamLink transmission
Specifically, lighting module 10 includes light source 11 and lens subassembly 12, and the light that light source 11 is issued is through lens subassembly
The first light path is formed after 12 refractions expose to the grinding skin of roll 200.Microimaging module 20 includes：Microlens 21 and camera
Module 22, the grinding skin of the first light path Jing roll 200 reflects to form the second light path, the second light path focused on by microlens 21 after by
Camera model 22 is converted into image or video information.The central optical path of the first light path is with the angle of the central optical path of the second light path
α。
Data transfer receives image or video information with processing module 30 by data transmission module, and roll 200 is ground
The image on surface is identified and processes, so as to carry out qualitative analysis and quantitative measurment to the grinding skin defect of roll 200.
As shown in figure 1, in the case of bright domain (light field) is illuminated, the first light path and the second light path opposite rolls 200 are ground
The centre normal of the irradiation area on surface is symmetrical arranged, and the first light path forms second through the grinding skin mirror-reflection of roll 200
Light path.As shown in Fig. 2 in the case of dark domain (details in a play not acted out on stage, but told through dialogues) is illuminated, the first light path and the grinding skin of the second light path opposite rolls 200
Irradiation area the asymmetric setting of centre normal, the first light path through the grinding skin diffusing reflection of roll 200 formed the second light path.
The angle of the central optical path of the central optical path of the first light path and the second light path is α.Alternatively, α scopes are 0-160 degree.
Wherein, lens subassembly 12 includes multiple lens, and multiple institute's lens are along the second optical path direction interval setting.Thus, may be used
To ensure that light source 11 sends fully being reflected, it is ensured that the grinding skin defect of roll 200 is effectively highlighted.
Alternatively, lighting module 10 and microimaging module 20 are located at the same side of the grinding skin of roll 200.Such as Fig. 1 institutes
Show, lighting module 10 and microimaging module 20 are respectively positioned on the upside of the grinding skin of roll 200.Thus, it is possible to so that based on aobvious
The roll dressing surface defects detection system detectio of micro- vision is more convenient, and the degree of accuracy is higher.
Advantageously, lighting module 10 and microimaging module 20 in the horizontal direction with the position-adjustable of vertical direction.From
And can according to the situation of actual measurement adjust lighting module 10 and microimaging module 20 in the horizontal direction with vertical direction
Position, improves the accuracy in detection based on the roll dressing surface defects detection system of micro-vision.
In other embodiments of the invention, as illustrated in fig. 1 and 2, the grinding skin defect detecting system of roll 200 includes：
Lighting module 10, microimaging module 20 and data transfer and processing module 30.Wherein, image or video information are by there is line number
Data transfer and processing module 30 are sent to according to transport module, wireless data transfer module can be WIFI or Bluetooth data transfer
Module.
Specifically, lighting module 10 includes light source 11 and lens subassembly 12, and the light that light source 11 is issued is through lens subassembly
The first light path is formed after 12 refractions expose to the grinding skin of roll 200.Microimaging module 20 includes：Microlens 21 and camera
Module 22, the grinding skin of the first light path Jing roll 200 reflects to form the second light path, the second light path focused on by microlens 21 after by
Camera model 22 is converted into image or video information.As shown in figure 1, in the case of bright domain (light field) is illuminated, the first light path and
The centre normal of the irradiation area of the grinding skin of the second light path opposite rolls 200 is symmetrical arranged, and the first light path is ground through roll 200
Cut surface specular reflections and form the second light path.As shown in Fig. 2 in the case of dark domain (details in a play not acted out on stage, but told through dialogues) is illuminated, the first light path and second
The asymmetric setting of centre normal of the irradiation area of the grinding skin of light path opposite rolls 200, the first light path is ground through roll 200
Surface diffusing reflection forms the second light path.The angle of the central optical path of the central optical path of the first light path and the second light path is α.It is optional
Ground, α scopes are 0-160 degree.
Data transfer receives image or video information with processing module 30 by data transmission module 30, and roll 200 is ground
The image for cutting surface is identified and processes, so as to carry out qualitative analysis and quantitative measurment to the grinding skin defect of roll 200.
Wherein, lens subassembly 12 includes multiple lens, and multiple institute's lens are along the second optical path direction interval setting.Thus, may be used
To ensure that light source 11 sends fully being reflected, it is ensured that the grinding skin defect of roll 200 is effectively highlighted.
Alternatively, lighting module 10 and microimaging module 20 are located at the same side of the grinding skin of roll 200.Lighting module
10 and microimaging module 20 in the horizontal direction with the position-adjustable of vertical direction.
The roll dressing surface defects detection based on micro-vision according to a specific embodiment of the invention is described below
The detection process of system.
With reference to Fig. 1, the operation of the roll dressing surface defects detection system based on micro-vision of the embodiment of the present invention with
Detection method is：First according to the size of tested roll 200 and defect situation to be detected, selects microscope camera system suitably to amplify
Multiple, and just its vertical range h with the surface of tested roll 200 region to be measured of successive step；Second adjustment illuminator and micro-
The distance between camera system d and the two respective angle of inclination beta1、β2Illuminator launching light Lu Zhizheng is set to connect with microscope camera system
Receive between light Lu Zhizheng into certain degree α；3rd fixes illuminator, shows situation to microimaging system with reference to micro-image
System is finely adjusted to obtain clearly micro-image, and the multiplication factor of microlens 21 is demarcated；The table of four pairs of rollers 200
Face measures, and micro-image that can be directly after real-time micro-image and/or image enhaucament real-time processing carries out determining
Property judge, while the image procossing such as can extract by defect microscopic features obtains qualitative and quantitative testing result；5th passes through
Mechanical system drives illuminator with microscope camera system mass motion and/or the surface of 200 wheel measuring roll of tested roll 200
Zones of different, is typically not required to readjust and demarcation detecting system during this.
In describing the invention, it is to be understood that term " on ", D score ", bottom ", " interior ", the side of the instruction such as " outward "
Position or position relationship are, based on orientation shown in the drawings or position relationship, to be for only for ease of the description present invention and simplify description,
Rather than indicate or imply indication device or element must have specific orientation, with specific azimuth configuration and operation, because
This is not considered as limiting the invention.
In the present invention, unless otherwise clearly defined and limited, term " installation ", " connected ", " connection ", " fixation " etc.
Term should be interpreted broadly, for example, it may be being fixedly connected, or being detachably connected, or be integrally connected；It can be machine
Tool connects, or electrically connects；Can be joined directly together, it is also possible to be indirectly connected to by intermediary, can be two units
Connection inside part.For the ordinary skill in the art, can as the case may be understand above-mentioned term at this
Concrete meaning in bright.
In the present invention, unless otherwise clearly defined and limited, fisrt feature second feature it " on " or D score
The first and second feature directly contacts can be included, it is also possible to be not directly contact but by it including the first and second features
Between other characterisation contact.And, fisrt feature second feature " on ", " top " and " above " include that first is special
Levy directly over second feature and oblique upper, or be merely representative of fisrt feature level height higher than second feature.Fisrt feature exists
Second feature " under ", " lower section " and " below " include fisrt feature directly over second feature and oblique upper, or be merely representative of
Fisrt feature level height is less than second feature.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means to combine specific features, structure, material or spy that the embodiment or example are described
Point is contained at least one embodiment of the present invention or example.In this manual, to the schematic representation of above-mentioned term not
Necessarily refer to identical embodiment or example.And, the specific features of description, structure, material or feature can be any
One or more embodiments or example in combine in an appropriate manner.
Although embodiments of the invention have been shown and described above, it is to be understood that above-described embodiment is example
Property, it is impossible to limitation of the present invention is interpreted as, one of ordinary skill in the art is in the principle and objective without departing from the present invention
In the case of above-described embodiment can be changed within the scope of the invention, change, replace and modification.
Claims (10)
1. a kind of roll dressing surface defects detection system based on micro-vision, it is characterised in that include：
Lighting module, the lighting module includes light source and lens subassembly, and the light that the light source is issued is through the lens group
The first light path is formed after part refraction expose to the roll dressing surface；
Microimaging module, the microimaging module includes：Microlens and camera model, roll described in first light path Jing
Roller grinding skin is specularly or diffusely penetrated to form the second light path, second light path by the microlens focusing after by institute
State camera model and be converted into image or video information；
Data transfer and processing module, the data transfer receives described image or regards with processing module by data transmission module
Frequency information, is identified and processes to the image on the roll dressing surface, so as to carry out to the roll dressing surface defect
Qualitative analysis and quantitative measurment.
2. the roll dressing surface defects detection system based on micro-vision according to claim 1, it is characterised in that institute
State the first light path and form circular light spot or rectangular light band on the roll dressing surface.
3. the roll dressing surface defects detection system based on micro-vision according to claim 1, it is characterised in that institute
Lens subassembly is stated including multiple lens, multiple lens are along the second optical path direction interval setting.
4. the roll dressing surface defects detection system based on micro-vision according to claim 1, it is characterised in that institute
It is white light or monochromatic light to state the light that light source sends.
5. the roll dressing surface defects detection system based on micro-vision according to claim 1, it is characterised in that institute
Data transmission module is stated for wired data transfer module or wireless data transfer module.
6. the roll dressing surface defects detection system based on micro-vision according to claim 1, it is characterised in that institute
The normal for stating the irradiation area on the first light path and the relatively described roll dressing surface of second light path is symmetrical arranged or asymmetric
Arrange.
7. the roll dressing surface defects detection system based on micro-vision according to claim 1, it is characterised in that institute
The central optical path and the angle of the central optical path of second light path for stating the first light path is α.
8. the roll dressing surface defects detection system based on micro-vision according to claim 7, it is characterised in that institute
α scopes are stated for 0-160 degree.
9. the roll dressing surface defects detection system based on micro-vision according to claim 1, it is characterised in that institute
State lighting module and the microimaging module is located at the same side on the roll dressing surface.
10. the roll dressing surface defects detection system based on micro-vision according to claim 9, it is characterised in that
The lighting module and the microimaging module in the horizontal direction with the position-adjustable of vertical direction.
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| CN201710104723.XA CN106645181A (en) | 2017-02-24 | 2017-02-24 | Microscopic vision-based roller grinding surface defect detecting system |
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| CN107576664A (en) * | 2017-09-28 | 2018-01-12 | 清华大学 | A kind of roll dressing surface defect Machine Vision Inspecting System |
| CN110836857A (en) * | 2019-11-19 | 2020-02-25 | 杭州深度视觉科技有限公司 | Detection system and detection method for super-precision grinding characteristics |
| CN112122366A (en) * | 2019-06-25 | 2020-12-25 | 宝山钢铁股份有限公司 | Hot roll surface online detection system and detection method thereof |
| WO2021031603A1 (en) * | 2019-08-16 | 2021-02-25 | 研祥智能科技股份有限公司 | Method for detecting defect in led support, image-capturing apparatus, and device for detecting defect in led support |
| CN112415023A (en) * | 2020-11-10 | 2021-02-26 | 浙江夏厦精密制造股份有限公司 | Detection method and device for representing grinding lines of columnar parts |
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