CN104777175A - Imaging method and device used for thermal-state cylindrical long product surface quality visual detection - Google Patents
Imaging method and device used for thermal-state cylindrical long product surface quality visual detection Download PDFInfo
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- CN104777175A CN104777175A CN201410010310.1A CN201410010310A CN104777175A CN 104777175 A CN104777175 A CN 104777175A CN 201410010310 A CN201410010310 A CN 201410010310A CN 104777175 A CN104777175 A CN 104777175A
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Abstract
The invention discloses an imaging method and a device used for thermal-state cylindrical long product surface quality visual detection. The imaging device comprises a plurality of imaging units, a control system, and a synchronous adjusting mechanism; position parameters, needed to be adjusted, of the imaging units are obtained via calculation by the cylindrical long product outer diameter control system via the synchronous adjusting mechanism; and automatic adjusting of the imaging units is realized via the synchronous adjusting mechanism. The imaging method and the device can be used for detecting surface quality of cylindrical long products of different types of a same unit; a visual detection system can be used for adjusting the position of the imaging units based on the outer diameter of the cylindrical long products, so that distance from an imaging sensor to the surfaces of the cylindrical long products is maintained to be constant, stable high-quality images are obtained, stable on-line detection of the surface quality of the thermal-state cylindrical long products is realized, surface defects of the cylindrical long products are discovered in time, batch defects are reduced, and finished product yield is increased.
Description
Technical field
The present invention relates to machine vision detection method and device, specifically about a kind of visible detection method for cylindrical long material surface quality and device.
Background technology
Mechanical vision inspection technology is the important means being widely used in product surface quality detection in recent years, and this technology, by obtaining the image on detected object surface and analyzing image and identify, is evaluated the surface quality of product accordingly.The acquisition of detected object surface image is a very important link in vision detection system, is also the key that vision detection system success realizes its function.The acquisition of measurand picture rich in detail, depends on each Primary Component and measurand in detection system and keeps the stable of each technical parameter.But due to the change of working condition and technique, thus cause measurand parameter often to change, this needs the image device in synchronous adjustment vision detection system to ensure that imaging parameters does not change, thus obtains the measurand image of stable and consistent.
In cylindrical long material surface quality detection, because cylindrical long material surface is circular shape, and the position detected generally is in high temperature, dust atmosphere, and testing conditions is comparatively severe; In addition, because of the cylindrical long material outside dimension change that same production line is produced, this is undoubtedly also for detection adds technical difficulty.In recent years, the Inner surface test of researcher both domestic and external to the cylindrical long material of cold conditions has carried out large quantifier elimination, and these researchs are mostly based on leakage field and ultrasonic detecting technology, and the outside surface vision-based detection research being applied to hot cylindrical long material is then relatively less.The EP2341330A2 European patent that denomination of invention is " to hot cylindrical member image acquisition and processing system (Image capturingand processing system for hot profiles of revolution) " describes a kind of method of hot cylindrical long material surface being carried out to imaging, be furnished with into three groups of linear array CCD cameras and the linear light sorurce of 120 degree of distributions, but this patent does not consider the change of cylindrical long material outside dimension.The scheme that the Chinese patent application that the OG company of wire rod detection technique research is artificially carried out in application in the world, denomination of invention be " with the self-alignment measuring method based on removable image and device (A method and apparatus of a portableimaging-based measurement with self calibration) " No. CN102549374A discloses adopts the imaging mode of change focal length to focus, although consider the change of long material outside dimension, adjustment and realization all comparatively difficulty.
Realize the on-line checkingi of hot cylindrical long material surface imperfection, for the mass defect finding cylindrical long material as early as possible, reduce the generation of batch defect, the lumber recovery improving cylindrical long material is very important.
Summary of the invention
The object of this invention is to provide a kind of formation method and device of hot cylindrical long material surface quality vision-based detection, picture cell position can be adjusted to according to cylindrical long material outside dimension, obtain the high-quality surface image of the cylindrical long material of different size, to realize hot cylindrical long material surface quality on-line checkingi.
A kind of imaging device of hot cylindrical long material surface quality vision-based detection is provided according to an aspect of the present invention, comprise: base, multiple image-generating unit, control system and synchronous adjusting mechanism, described base central authorities are formed with the through hole passed for cylindrical long material, have bull gear in described through hole peripheral disposition, the upper surface of bull gear is formed with planar rectangular helicitic texture in a circumferential direction with one heart, described multiple image-generating unit is separately fixed on mount pad, each image-generating unit comprises imageing sensor and light source, and be peripherally arranged on described base with equal intervals angle around described through hole, be formed with square thread bottom described mount pad to match with described planar rectangular helicitic texture, described control system is connected with described imageing sensor, with the distance between computed image sensor and cylindrical long material outside surface, described synchronous adjusting mechanism is by stepper motor, pinion wheel, described bull gear, described square thread and rectangle plane square thread structure composition, wherein, described stepper motor is connected with described control system, this distance value signal calculated with receiving control system is to determine the rotational angle required for described stepper motor, pinion wheel and bull gear engage each other, described stepper motor is connected with pinion wheel and drives bull gear to rotate with driving pinion, each mount pad is driven together with each image-generating unit synchronously along being moved and the position of multiple image-generating unit described in synchronous adjustment by the direction at described through hole center by planar rectangular helicitic texture.
Described multiple image-generating unit is 3, and the described equal intervals angle of peripherally arranging around described through hole is 120 degree.
Described multiple image-generating unit is 4, and the described equal intervals angle of peripherally arranging around described through hole is 90 degree.
Described multiple image-generating unit is 6, and the described equal intervals angle of peripherally arranging around described through hole is 60 degree.
A kind of formation method of hot cylindrical long material surface quality vision-based detection is provided according to a further aspect of the invention, comprises:
Obtain the outside dimension of cylindrical long material;
Calculated step motor needs the angle parameter rotated;
Synchronous adjusting mechanism drives image-generating unit synchronizing moving;
Image-generating unit is adjusted to the right place;
Image is gathered by light source and imageing sensor;
Judge whether external diameter changes: if change, then obtain cylindrical long material outside dimension and continue subsequent step, if otherwise unchanged adjustment end.
Described calculated step motor needs the angle parameter rotated, and comprising: when cylindrical long material outside diameter d change, by the distance between control system computed image sensor and cylindrical long material outside surface, need the angle of rotating according to this distance value determination stepper motor.
Described synchronous adjusting mechanism drives image-generating unit synchronizing moving, comprise: driven the spur pinion rotation being attached thereto and connecing by stepper motor, driving bull gear to rotate by spur pinion drives the square thread bottom mount pad to rotate with the planar rectangular helicitic texture of the circumferencial direction by bull gear upper surface, moved by the direction at cylindrical Chang Cai center with the image-generating unit edge of control chart image-position sensor and combination of light sources, thus the position of the image-generating unit of the cylindrical long material periphery of synchronous adjustment.
The present invention adopts synchronous adjusting mechanism, realize the sync bit adjustment of multiple image-generating unit, the high quality graphic on the long material surface of various outer diameter size cylindrical can be obtained, thus realize the stable on-line checkingi of hot cylindrical long material surface quality, the cylindrical long material surface imperfection of Timeliness coverage, reduce the generation of batch defect, improve lumber recovery.
Accompanying drawing explanation
Fig. 1 is the front view of the imaging device of the hot cylindrical long material surface quality vision-based detection of one embodiment of the invention, has wherein made broken section;
Fig. 2 is along the cut-open view that A-A line is got in Fig. 1;
Fig. 3 is the right view of Fig. 1;
Fig. 4 is the stereographic map of the imaging device of the hot cylindrical long material surface quality vision-based detection of one embodiment of the invention;
Fig. 5 is the process flow diagram of the formation method of the hot cylindrical long material surface quality vision-based detection of one embodiment of the invention.
Embodiment
For above-mentioned purpose of the present invention, feature and advantage can be become apparent, below in conjunction with accompanying drawing, the specific embodiment of the present invention is elaborated.First it should be noted that, the present invention is not limited to following embodiment, and the spirit that those skilled in the art should embody from following embodiment is to understand the present invention, and each technical term can do the most wide in range understanding based on Spirit Essence of the present invention.In figure, same or analogous component uses the same reference numerals to represent.
As shown in Figures 1 to 4, the imaging device 10 of a kind of hot cylindrical long material surface quality vision-based detection of one embodiment of the present of invention, comprising: base 1,4 image-generating units 2, control system (not shown) and synchronous adjusting mechanism.
Each ingredient of above-described embodiment is illustrated below in conjunction with accompanying drawing.
The central authorities of base 1 are formed with the through hole 1a passed for cylindrical long material 5, and have bull gear 1b in the peripheral disposition of through hole 1a, the upper surface of bull gear 1b is formed with planar rectangular helicitic texture 1b ' in a circumferential direction with one heart.4 image-generating units 2 are separately fixed on mount pad 2c, peripherally arrange with 90 degree of equal intervals angles around through hole 1a to make 4 image-generating units 2.In other embodiments, the quantity of image-generating unit and position, can arrange 3 according to the requirement of systemic resolution, 120 degree of layouts of being separated by, or arrange 6,60 degree of layouts of being separated by.Each image-generating unit 2 comprises imageing sensor 2a and light source 2b.The bottom of the mount pad 2c of image-generating unit 2 is formed with square thread 2c ' and matches with the planar rectangular helicitic texture 1b ' beaten on gear ring 1b.Control system is connected with imageing sensor 2a, with the distance between computed image sensor 2a and the outside surface of cylindrical long material 5.Synchronous adjusting mechanism is made up of stepper motor (sign), pinion wheel 4, bull gear 1b, square thread 2c ', rectangle plane square thread structure 1b '.Wherein, stepper motor is connected with control system, and this distance value signal calculated with receiving control system is to determine the rotational angle required for stepper motor.Pinion wheel 4 and bull gear 1b engage each other, and stepper motor is connected with pinion wheel 4 and drives bull gear 1b ' to rotate with driving pinion 4.Being coordinated by its guide rail 2d, 1d separately between mount pad 2c and base 1, therefore each mount pad 2c can being driven to comprise imageing sensor 2a and light source 2b synchronously along being moved and synchronous adjustment position by the direction at through hole 1a center together with each image-generating unit 2 by planar rectangular helicitic texture 1b ' when bull gear 1b rotates under the drive of pinion wheel 4.The profile of tooth that described pinion wheel 4 and bull gear 1b are meshed in the present embodiment is straight-tooth, can certainly adopt helical teeth.
As shown in Figure 5, the formation method of the hot cylindrical long material surface quality vision-based detection of the one embodiment of the invention adopting the above-mentioned imaging device of the present invention to implement, comprising:
Obtain the outside dimension d of cylindrical long material 5;
Calculated step motor needs the angle parameter rotated: when cylindrical long material outside diameter d change, by the distance between control system computed image sensor 2a and cylindrical long material 5 outside surface, need the angle of rotating according to this distance value determination stepper motor;
Synchronous adjusting mechanism drives image-generating unit synchronizing moving: be attached thereto by stepper motor drive the spur pinion 4 connect and rotate, spur pinion drives bull gear 1b rotation to drive the square thread bottom mount pad 2c to rotate with the plane square helicitic texture 1b ' by circumferencial direction, the image-generating unit 2 combined with control chart image-position sensor 2a and light source 2b moves along by the cylindrical long material 5 i.e. direction at through hole center, thus the position of the image-generating unit of cylindrical long material 5 periphery of synchronous adjustment;
Image-generating unit 2 is adjusted to the right place;
Image is gathered by light source 2b and imageing sensor 2a;
Judge whether external diameter changes: if change, then obtain cylindrical long material outside dimension d and continue above-mentioned subsequent step, if otherwise unchanged adjustment end.
As mentioned above, imageing sensor 2a is along the peripheral angled layout of cylindrical long material 5, when the outside dimension d of the cylindrical long material 5 produced changes, the imageing sensor 2a being arranged in cylindrical long material 5 periphery is just along by the cylindrical center line of long material 5 and the center line synchronizing moving of through hole 1a, image-forming range between imageing sensor 2a and cylindrical long material 5 surface remains unchanged, and reaches the object reliablely and stablely gathering cylindrical long material 5 surface image.
In the imaging system of cylindrical long material surface, imageing sensor 2a and light source 2b combines and becomes image-generating unit 2, and when imageing sensor 2a moves with synchronous adjusting mechanism, light source 2b also moves together, keeps the parameter constant of imaging system.Therefore, the present invention can according to the position of each image-generating unit 2 of cylindrical long material 5 synchronous adjustment of production different model, to keep constant distance between image-generating unit 2 and cylindrical long material 5 surface to obtain stable high quality graphic.
In sum, the present invention adopts synchronous adjusting mechanism vision detection system can be adjusted to picture cell position according to cylindrical long material outside dimension, obtain the high-quality surface image of the cylindrical long material of different size, realize the online stable detection of hot cylindrical long material surface quality, the cylindrical long material surface imperfection of Timeliness coverage, reduce the generation of batch defect, improve lumber recovery.
Should be understood that those skilled in the art can make various changes or modifications the present invention, and these equivalent form of values fall within the application's appended claims limited range equally after having read above-mentioned instruction content of the present invention.
Claims (7)
1. an imaging device for hot cylindrical long material surface quality vision-based detection, is characterized in that, comprising: base, multiple image-generating unit, control system and synchronous adjusting mechanism, described base central authorities are formed with the through hole passed for cylindrical long material, and have bull gear in described through hole peripheral disposition, the upper surface of bull gear is formed with planar rectangular helicitic texture in a circumferential direction with one heart, described multiple image-generating unit is separately fixed on mount pad, each image-generating unit comprises imageing sensor and light source, and be peripherally arranged on described base with equal intervals angle around described through hole, be formed with square thread bottom described mount pad to match with described planar rectangular helicitic texture, described control system is connected with described imageing sensor, with the distance between computed image sensor and cylindrical long material outside surface, described synchronous adjusting mechanism is by stepper motor, pinion wheel, described bull gear, described square thread and rectangle plane square thread structure composition, wherein, described stepper motor is connected with described control system, this distance value signal calculated with receiving control system is to determine the rotational angle required for described stepper motor, described pinion wheel and bull gear engage each other, described stepper motor is connected with pinion wheel and drives bull gear to rotate with driving pinion, each mount pad is driven together with each image-generating unit synchronously along being moved and the position of multiple image-generating unit described in synchronous adjustment by the direction at described through hole center by planar rectangular helicitic texture.
2. the imaging device of hot cylindrical long material surface quality vision-based detection according to claim 1, it is characterized in that, described multiple image-generating unit is 3, and the described equal intervals angle of peripherally arranging around described through hole is 120 degree.
3. the imaging device of hot cylindrical long material surface quality vision-based detection according to claim 1, it is characterized in that, described multiple image-generating unit is 4, and the described equal intervals angle of peripherally arranging around described through hole is 90 degree.
4. the imaging device of hot cylindrical long material surface quality vision-based detection according to claim 1, it is characterized in that, described multiple image-generating unit is 6, and the described equal intervals angle of peripherally arranging around described through hole is 60 degree.
5. a formation method for hot cylindrical long material surface quality vision-based detection, is characterized in that, adopt the imaging device described in Claims 1-4 to implement, described formation method comprises the following steps:
Obtain the outside dimension of cylindrical long material;
Calculated step motor needs the angle parameter rotated;
Synchronous adjusting mechanism drives image-generating unit synchronizing moving;
Image-generating unit is adjusted to the right place;
Image is gathered by light source and imageing sensor;
Judge whether external diameter changes: if change, then obtain cylindrical long material outside dimension and continue subsequent step, if unchanged, adjusting end.
6. the formation method of hot cylindrical long material surface quality vision-based detection according to claim 5, it is characterized in that, described calculated step motor needs the angle parameter rotated, comprise: when cylindrical long material external diameter change, by the distance between control system computed image sensor and cylindrical long material outside surface, need the angle of rotating according to this distance value determination stepper motor.
7. the formation method of the hot cylindrical long material surface quality vision-based detection according to claim 5 or 6, it is characterized in that, described synchronous adjusting mechanism drives image-generating unit synchronizing moving, comprise: driven the spur pinion rotation being attached thereto and connecing by stepper motor, driving bull gear to rotate by spur pinion drives the square thread bottom mount pad to rotate with the planar rectangular helicitic texture of the circumferencial direction by bull gear upper surface, moved by the direction at cylindrical Chang Cai center with the image-generating unit edge of control chart image-position sensor and combination of light sources, thus the position of the image-generating unit of the cylindrical long material periphery of synchronous adjustment.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107666569A (en) * | 2016-07-29 | 2018-02-06 | 宝山钢铁股份有限公司 | The Atomatic focusing method of steel tube surface detection means |
| CN107976454A (en) * | 2017-11-16 | 2018-05-01 | 广州航海学院 | A kind of plastic pipe surface defect detection apparatus and its detection method |
| CN113533368A (en) * | 2021-05-24 | 2021-10-22 | 国网河北省电力有限公司衡水供电分公司 | Electric pole crack detection device, control method and control terminal |
| CN113567468A (en) * | 2020-04-28 | 2021-10-29 | 宝山钢铁股份有限公司 | Tube and bar surface self-adaptive imaging system and method suitable for V-shaped roller way conveying |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101258510A (en) * | 2005-08-02 | 2008-09-03 | Og技术公司 | Apparatus and method for detecting surface defects on a workpiece such as a rolled/drawn metal bar |
| EP2341330A2 (en) * | 2009-12-29 | 2011-07-06 | Fundación Robotiker | Image capturing and processing system for hot profiles of revolution |
| CN102680753A (en) * | 2012-06-07 | 2012-09-19 | 上海中科深江电动车辆有限公司 | Adjustable rear bracket used in bench test of permanent magnet synchronous motor (PMSM) of electric vehicle |
| CN103223634A (en) * | 2013-04-27 | 2013-07-31 | 北京航空航天大学 | Synchronous processing device with circular array curve surface structure |
| CN103650059A (en) * | 2011-07-13 | 2014-03-19 | 韩国电力技术株式会社 | Apparatus and method for inspecting pipelines |
-
2014
- 2014-01-09 CN CN201410010310.1A patent/CN104777175B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101258510A (en) * | 2005-08-02 | 2008-09-03 | Og技术公司 | Apparatus and method for detecting surface defects on a workpiece such as a rolled/drawn metal bar |
| EP2341330A2 (en) * | 2009-12-29 | 2011-07-06 | Fundación Robotiker | Image capturing and processing system for hot profiles of revolution |
| CN103650059A (en) * | 2011-07-13 | 2014-03-19 | 韩国电力技术株式会社 | Apparatus and method for inspecting pipelines |
| CN102680753A (en) * | 2012-06-07 | 2012-09-19 | 上海中科深江电动车辆有限公司 | Adjustable rear bracket used in bench test of permanent magnet synchronous motor (PMSM) of electric vehicle |
| CN103223634A (en) * | 2013-04-27 | 2013-07-31 | 北京航空航天大学 | Synchronous processing device with circular array curve surface structure |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107666569A (en) * | 2016-07-29 | 2018-02-06 | 宝山钢铁股份有限公司 | The Atomatic focusing method of steel tube surface detection means |
| CN107666569B (en) * | 2016-07-29 | 2020-04-28 | 宝山钢铁股份有限公司 | Automatic focusing method of steel pipe surface detection device |
| CN107976454A (en) * | 2017-11-16 | 2018-05-01 | 广州航海学院 | A kind of plastic pipe surface defect detection apparatus and its detection method |
| CN113567468A (en) * | 2020-04-28 | 2021-10-29 | 宝山钢铁股份有限公司 | Tube and bar surface self-adaptive imaging system and method suitable for V-shaped roller way conveying |
| CN113567468B (en) * | 2020-04-28 | 2023-11-14 | 宝山钢铁股份有限公司 | Pipe rod surface self-adaptive imaging system and method suitable for V-shaped roller way conveying |
| CN113533368A (en) * | 2021-05-24 | 2021-10-22 | 国网河北省电力有限公司衡水供电分公司 | Electric pole crack detection device, control method and control terminal |
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