CN103529043A - Optical detection system for defects of billet and detection method thereof - Google Patents
Optical detection system for defects of billet and detection method thereof Download PDFInfo
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- CN103529043A CN103529043A CN201210233101.4A CN201210233101A CN103529043A CN 103529043 A CN103529043 A CN 103529043A CN 201210233101 A CN201210233101 A CN 201210233101A CN 103529043 A CN103529043 A CN 103529043A
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Abstract
The invention relates to an optical detection system for defects of a billet and a detection method of the system. The detection system comprises a plurality of first matrix image acquiring devices, a plurality of second matrix image acquiring devices, a linear image acquiring device, a plurality of projection light sources, and an image data processing device, wherein the plurality of first matrix image acquiring devices respectively face four surfaces of one billet, the plurality of second matrix image acquiring devices respectively face a first corner, a second corner and a third corner of the billet, the linear image acquiring device faces a fourth corner of the billet, the plurality of projection light sources are respectively arranged at the corresponding positions of the corners of the billet, the image data processing device is used for judging whether each image has a defect or the types of the defects according to the images obtained by the plurality of first matrix image acquiring devices, the plurality of second matrix image acquiring devices and the linear image acquiring device and a set decision rule. Therefore, the defects of the surfaces and defects of the corners of the long edge of the billet can be simultaneously detected.
Description
Technical field
The present invention relates to a kind of defect detecting system and detection method thereof, particularly relate to a kind of steel embryo defect Systems for optical inspection and detection method thereof.
Background technology
Steel embryo defects detection is the stability of judgement steel embryo manufacture craft and the most important technological means of steel grade grade feature.Yet, known steel embryo defect detecting system and detection method mostly can only detect the defect of steel embryo surface, it does not have detectability to being formed at the microscler defect of corner areas (particularly bight under steel embryo), cause system test to be covered and rate deficiency, thereby make to have a large amount of outputs of steel embryo defective products of microscler corner defect.
Therefore, be necessary the steel embryo defect Systems for optical inspection and the detection method thereof that an innovation are provided and there is progressive, to address the above problem.
Summary of the invention
The invention provides a kind of steel embryo defect Systems for optical inspection, comprising: a plurality of the first matrix type video capturing devices, respectively in the face of four surfaces of a steel embryo; A plurality of the second matrix type video capturing devices, respectively in the face of one first corner, one second corner and one the 3rd corner of this steel embryo; One line style video capturing device, in the face of one the 4th corner of this steel embryo; A plurality of projection sources, are arranged at respectively the relative position of each corner of this steel embryo; And an image data processing device, each image that it obtains according to described a plurality of the first matrix type video capturing devices, described a plurality of the second matrix type video capturing devices and this line style video capturing device respectively and is set decision rule and is judged whether each image has the kind of defect and defect.
The present invention also provides a kind of steel embryo defect optical detecting method, comprises the following steps:
(a) provide a plurality of the first matrix type video capturing devices, a plurality of the second matrix type video capturing device, a line style video capturing device and a plurality of projection source;
(b) carry out an arrangement of components step, wherein make described a plurality of the first matrix type video capturing device face respectively four surfaces of a steel embryo, make described a plurality of the second matrix type video capturing device face respectively one first corner, one second corner and one the 3rd corner of this steel embryo, make this line style video capturing device in the face of one the 4th corner of this steel embryo and make described a plurality of projection source be arranged at respectively the relative position of each corner of this steel embryo;
(c) carry out an image capturing step, wherein utilize described a plurality of the first matrix type video capturing device, described a plurality of the second matrix type video capturing devices and this line style video capturing device to obtain respectively surface described in each of this steel embryo and the image of corner described in each; And
(d) carry out a defect determining step, each image wherein obtaining according to described a plurality of the first matrix type video capturing devices, described a plurality of the second matrix type video capturing devices and this line style video capturing device respectively and is set decision rule and is judged whether each image has the kind of defect and defect.
Steel embryo defect Systems for optical inspection of the present invention and detection method can detect surface imperfection and the microscler corner defect of steel embryo simultaneously, and then assist stability and the steel grade grade feature of judgement manufacture craft.
Accompanying drawing explanation
Fig. 1 illustrates the configuration diagram of steel embryo defect Systems for optical inspection of the present invention;
Fig. 2 illustrates the configuration schematic diagram of projection source of the present invention;
Fig. 3 illustrates the schematic diagram of steel embryo defects detection action of the present invention; And
Fig. 4 illustrates the process flow diagram of steel embryo defect optical detecting method of the present invention.
Embodiment
Fig. 1 illustrates the configuration diagram of steel embryo defect Systems for optical inspection of the present invention; Fig. 2 illustrates the configuration schematic diagram of projection source of the present invention.Please refer to Fig. 1 and Fig. 2, steel embryo defect Systems for optical inspection of the present invention comprises: a plurality of the first matrix type video capturing devices 11, a plurality of the second matrix type video capturing device 12, a line style video capturing device 13, a plurality of projection source 14 and an image data processing device (not drawing in figure).
Described a plurality of the first matrix type video capturing device 11 is respectively in the face of four surperficial S of a steel embryo 2, to obtain respectively the image of surperficial S described in each.This steel embryo 2 is optional from following a kind of: rhombus steel embryo, square steel embryo and rectangular bar of steel embryo.In the present embodiment, this steel embryo 2 is rhombus steel embryo.
Described a plurality of the second matrix type video capturing device 12 is faced respectively one first corner A1, one second corner A2 and one the 3rd corner A3 of this steel embryo 2, to obtain respectively the image of this first corner A1, this second corner A2 and the 3rd corner A3.
This line style video capturing device 13 is in the face of one the 4th corner A4 of this steel embryo 2, to obtain the image of the 4th corner A4.In the present embodiment, the 4th corner A4 be positioned at this steel embryo 2 under, this line style video capturing device 13 has a slit shape image capturing optical path OP, this slit shape image capturing optical path OP is to the 4th corner A4 that should steel embryo 2.
Described a plurality of projection source 14 is arranged at respectively each corner A1, A2, the A3 of this steel embryo 2, the relative position of A4.In the present embodiment, described a plurality of projection source 14 comprises four the first gas-discharge lamps 141 and second gas-discharge lamp 142.Described in each, the first gas-discharge lamp 141 irradiates respectively corner A1, A2 described in each of this steel embryo 2, A3, A4, so that described a plurality of the first matrix type video capturing device 11 and the required illumination of described a plurality of the second matrix type video capturing device 12 to be provided, preferably, these first gas-discharge lamps 141 are for having the high-intensity gas discharge lamp of the direct current of Throwing thing line style reflector or the high brightness of alternating current type, high color temperature, high evenness; This second gas-discharge lamp 142 irradiates the 4th corner A4 of this steel embryo 2, and to provide this line style video capturing device 13 required illumination, preferably, this second gas-discharge lamp 142 is for having the direct current high-intensity gas discharge lamp of Throwing thing line style reflector.
Each image that this image data processing device obtains according to described a plurality of the first matrix type video capturing devices 11, described a plurality of the second matrix type video capturing devices 12 and this line style video capturing device 13 respectively and one is set decision rule and is judged whether each image has the kind of defect and defect.
Fig. 3 illustrates the schematic diagram of steel embryo defects detection action of the present invention.Refer to Fig. 3, because of this line style video capturing device 13 be arranged on high-temperature steel embryo 2 under, for avoiding affecting the image capturing of this line style video capturing device 13 because high temperature heat radiation and steel embryo scale drop, in the present embodiment, one mirror assembly 15 is arranged on the slit shape image capturing optical path OP of this line style video capturing device 13, by this mirror assembly 15, adjust image capturing optical path, to avoid this line style video capturing device 13 to be subject to the impact of heat radiation and steel embryo scale.Preferably, this mirror assembly 15 comprises hollow housing 151,1 degree catoptron 152 and cover glasses 153.This hollow housing 151 has one first optical path mouth 151a, one second optical path mouth 151b, an inner air cooling passage 154 and an inclination turning point 155, this inside air cooling passage 154 is communicated with this first optical path mouth 151a and this second optical path mouth 151b, 155 pairs of this inclination turning points should the first optical path mouth 151a and this second optical path mouth 151b, and preferably, the tilt angle theta of this inclination turning point 155 is 45 degree.This 90 degree catoptron 152 is arranged at this inclination turning point 155, in order to the image of the 4th corner A4 of this steel embryo 2 is reflexed to this line style video capturing device 13.This cover glass 153 is arranged at this second optical path mouth 151b, pollutes this 90 degree catoptron 152 in order to prevent steel embryo scale or other foreign matter from falling in this hollow housing 151.In addition, because this mirror assembly 15 exposes to the open air at high temperature and the environment that dabbles, can this mirror assembly 15 of effective cooling by this inside air cooling passage 154.
In addition; for further removing the chaff interferences such as steel embryo scale and water droplet; in the present embodiment; one vacuum slot device 16 is arranged at this hollow housing 151 outsides; and contiguous this cover glass 153; this vacuum slot device 16 can just be siphoned away before steel embryo scale and water droplet are met this cover glass 153, and then can guarantee the cleanliness factor of this cover glass 153.
Fig. 4 illustrates the process flow diagram of steel embryo defect optical detecting method of the present invention.Please refer to the step S41 of Fig. 1, Fig. 2 and Fig. 4, provide a plurality of video capturing devices and a plurality of projection source.In this step, provide a plurality of the first matrix type video capturing devices 11, a plurality of the second matrix type video capturing device 12, a line style video capturing device 13 and a plurality of projection source 14.
Refer to step S42, carry out an arrangement of components step, wherein make described a plurality of the first matrix type video capturing device 11 respectively in the face of four surperficial S of a steel embryo 2, make described a plurality of the second matrix type video capturing device 12 respectively in the face of one first corner A1, one second corner A2 and one the 3rd corner A3 of this steel embryo 2, make this line style video capturing device 13 in the face of one the 4th corner A4 of this steel embryo 2 and make described a plurality of projection source 14 be arranged at respectively each corner A1, A2, the A3 of this steel embryo 2, the relative position of A4.
Refer to step S43, carry out an image capturing step, wherein utilize described a plurality of the first matrix type video capturing device 11, described a plurality of the second matrix type video capturing devices 12 and this line style video capturing device 13 to obtain respectively surperficial S described in each of this steel embryo 2 and the image of corner A1, A2, A3, A4 described in each.
Refer to step S44, carry out a defect determining step, each image wherein obtaining according to described a plurality of the first matrix type video capturing devices 11, described a plurality of the second matrix type video capturing devices 12 and this line style video capturing device 13 respectively and is set decision rule and is judged whether each image has the kind of defect and defect.In this step, possible defect characteristic according to each image determines whether defect, if be judged as this image, there is defect, according to the kind of this setting decision rule judgement defect (such as: microscler corner defect, corner crack, slag inclusion, spongy, tear, linear slit and through roll prolong formed defect as heavy face, scratch, delaminate, the defect such as slivering).
Steel embryo defect Systems for optical inspection of the present invention and detection method can detect surface imperfection and the microscler corner defect of steel embryo simultaneously, and then assist stability and the steel grade grade feature of judgement manufacture craft.
Above-described embodiment is only explanation principle of the present invention and effect thereof, and unrestricted the present invention, so modification and variation that those skilled in the art carry out above-described embodiment still do not depart from spirit of the present invention.Interest field of the present invention should be as advocated in appended claim.
Simple declaration to the element numbers in accompanying drawing:
11 first matrix type video capturing devices
12 second matrix type video capturing devices
13 line style video capturing devices
2 steel embryos
A1 the first corner
A2 the second corner
A3 the 3rd corner
A4 the 4th corner
OP slit shape image capturing optical path
S surface
Claims (18)
1. a steel embryo defect Systems for optical inspection, comprising:
A plurality of the first matrix type video capturing devices, respectively in the face of four surfaces of a steel embryo;
A plurality of the second matrix type video capturing devices, respectively in the face of one first corner, one second corner and one the 3rd corner of this steel embryo;
One line style video capturing device, in the face of one the 4th corner of this steel embryo;
A plurality of projection sources, are arranged at respectively the relative position of each corner of this steel embryo; And
One image data processing device, each image obtaining according to described a plurality of the first matrix type video capturing devices, described a plurality of the second matrix type video capturing devices and this line style video capturing device respectively and is set decision rule and is judged whether each image has the kind of defect and defect.
2. steel embryo defect Systems for optical inspection as claimed in claim 1, wherein the 4th corner be positioned at this steel embryo under.
3. steel embryo defect Systems for optical inspection as claimed in claim 1, wherein this line style video capturing device has a slit shape image capturing optical path, and this slit shape image capturing optical path is to the 4th corner that should steel embryo.
4. steel embryo defect Systems for optical inspection as claimed in claim 3, also comprises a mirror assembly, and this mirror assembly is arranged on the slit shape image capturing optical path of this line style video capturing device.
5. steel embryo defect Systems for optical inspection as claimed in claim 4; wherein this mirror assembly comprises a hollow housing, one 90 degree catoptron and cover glasses; this hollow housing has one first optical path mouth, one second optical path mouth and an inclination turning point; this inclination turning point is to should the first optical path mouth and this second optical path mouth; this 90 degree catoptron is arranged at this inclination turning point, and this cover glass is arranged at this second optical path mouth.
6. steel embryo defect Systems for optical inspection as claimed in claim 5, wherein this hollow housing has an inner air cooling passage, this this first optical path mouth of inside air cooling channel connection and this second optical path mouth.
7. steel embryo defect Systems for optical inspection as claimed in claim 5, wherein the angle of inclination of this inclination turning point is 45 degree.
8. steel embryo defect Systems for optical inspection as claimed in claim 5, also comprises a vacuum slot device, and this vacuum slot device is arranged at the outside of this hollow housing, and contiguous this cover glass.
9. steel embryo defect Systems for optical inspection as claimed in claim 1, wherein said a plurality of projection source comprises four the first gas-discharge lamps and second gas-discharge lamp, described in each, the first gas-discharge lamp irradiates respectively corner described in each of this steel embryo, and the 4th corner of this this steel embryo of the second gas discharge light irradiation.
10. steel embryo defect Systems for optical inspection as claimed in claim 9, wherein said a plurality of the first gas-discharge lamps are the high-intensity gas discharge lamp with the direct current of Throwing thing line style reflector or the high brightness of alternating current type, high color temperature, high evenness.
11. steel embryo defect Systems for optical inspections as claimed in claim 9, wherein this second gas-discharge lamp is the direct current high-intensity gas discharge lamp with Throwing thing line style reflector.
12. steel embryo defect Systems for optical inspections as claimed in claim 1, wherein this steel embryo is selected from following a kind of: rhombus steel embryo, square steel embryo and rectangular bar of steel embryo.
13. 1 kinds of steel embryo defect optical detecting methods, comprise the following steps:
(a) provide a plurality of the first matrix type video capturing devices, a plurality of the second matrix type video capturing device, a line style video capturing device and a plurality of projection source;
(b) carry out an arrangement of components step, wherein make described a plurality of the first matrix type video capturing device face respectively four surfaces of a steel embryo, make described a plurality of the second matrix type video capturing device face respectively one first corner, one second corner and one the 3rd corner of this steel embryo, make this line style video capturing device in the face of one the 4th corner of this steel embryo and make described a plurality of projection source be arranged at respectively the relative position of each corner of this steel embryo;
(c) carry out an image capturing step, wherein utilize described a plurality of the first matrix type video capturing device, described a plurality of the second matrix type video capturing devices and this line style video capturing device to obtain respectively surface described in each of this steel embryo and the image of corner described in each; And
(d) carrying out a defect determining step, is that each image and a setting decision rule of obtaining according to described a plurality of the first matrix type video capturing devices, described a plurality of the second matrix type video capturing devices and this line style video capturing device respectively judges whether each image has the kind of defect and defect.
14. steel embryo defect optical detecting methods as claimed in claim 13, wherein this line style video capturing device has a slit shape image capturing optical path, and this slit shape image capturing optical path is to the 4th corner that should steel embryo.
15. steel embryo defect optical detecting methods as claimed in claim 14 wherein also comprise and a mirror assembly are set on the slit shape image capturing optical path of this line style video capturing device in step (b).
16. steel embryo defect optical detecting methods as claimed in claim 15; wherein this mirror assembly comprises a hollow housing, one 90 degree catoptron and cover glasses; this hollow housing has one first optical path mouth, one second optical path mouth and an inclination turning point; this inclination turning point is to should the first optical path mouth and this second optical path mouth; this 90 degree catoptron is arranged at this inclination turning point, and this cover glass is arranged at this second optical path mouth.
17. steel embryo defect optical detecting methods as claimed in claim 16, wherein this hollow housing has an inner air cooling passage, this this first optical path mouth of inside air cooling channel connection and this second optical path mouth.
18. steel embryo defect optical detecting methods as claimed in claim 16 wherein also comprise the outside that a vacuum slot is installed on this hollow housing are set in step (b), and contiguous this cover glass of this vacuum slot device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210233101.4A CN103529043B (en) | 2012-07-06 | 2012-07-06 | Steel embryo defect Systems for optical inspection and detection method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210233101.4A CN103529043B (en) | 2012-07-06 | 2012-07-06 | Steel embryo defect Systems for optical inspection and detection method thereof |
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| CN103529043A true CN103529043A (en) | 2014-01-22 |
| CN103529043B CN103529043B (en) | 2015-10-28 |
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2012
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Patent Citations (8)
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| JPS5788307A (en) * | 1980-11-25 | 1982-06-02 | Nippon Steel Corp | Method for detecting surface flow of steel billet |
| JPS62232546A (en) * | 1986-04-01 | 1987-10-13 | Kobe Steel Ltd | Detection of surface flaw |
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| US7460703B2 (en) * | 2002-12-03 | 2008-12-02 | Og Technologies, Inc. | Apparatus and method for detecting surface defects on a workpiece such as a rolled/drawn metal bar |
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| CN2859517Y (en) * | 2006-01-01 | 2007-01-17 | 广东韶钢松山股份有限公司 | On-line testing device for billet surface |
| JP2008304306A (en) * | 2007-06-07 | 2008-12-18 | Nippon Steel Corp | Device and method for inspecting defects |
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Non-Patent Citations (2)
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