CN103322948A - Detection method, detection device and processing method of concave and convex points on surface of plate blank - Google Patents
Detection method, detection device and processing method of concave and convex points on surface of plate blank Download PDFInfo
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- CN103322948A CN103322948A CN2013102801546A CN201310280154A CN103322948A CN 103322948 A CN103322948 A CN 103322948A CN 2013102801546 A CN2013102801546 A CN 2013102801546A CN 201310280154 A CN201310280154 A CN 201310280154A CN 103322948 A CN103322948 A CN 103322948A
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Abstract
The invention provides a detection method, a detection device and a processing method of concave and convex points on the surface of a plate blank, which are used for detecting the plate blank which is cleaned by flame. The detection method provides a line laser generator, a CCD (Charge Coupled Device) probe and a data processing computer. The detection method comprises the following steps of: firstly, enabling laser emitted by the line laser generator to be vertically emitted to the surface of the plate blank to form laser lines on the surface of the plate blank; then, utilizing the CCD probe to obliquely shoot pictures of the laser lines and adjacent regions thereof from one side of the laser lines and transmitting the pictures to the data processing computer; and finally, judging the condition of the concave and convex points on the surface of the plate blank according to a bending condition of the laser lines. According to the detection method, the detection device and the processing method disclosed by the invention, the CCD probe is used for shooting the laser lines formed on the plate blank, so that the condition of the concave and convex points on the surface of the plate blank is judged through the bending change of the laser lines on the plate blank.
Description
Technical field
The present invention relates to the detection technique of field of metallurgy, relate in particular to a kind of steel slab surface sags and crests detection method, pick-up unit and disposal route.
Background technology
In the sheet billet continuous casting production run, the various surface imperfection such as transverse and longitudinal crackle, subcutaneous pin hole, slag inclusion, depression unavoidably can appear in the continuous casting billet surface, thereby affect the quality of final products.Therefore, need under many circumstances to melt the defective of removing billet surface with slab flame cleaning.Slab after cleaning since arrange in the position of burner and scale removal process in various situations to cause clearing up rear steel slab surface uneven.On the slab production line, for guaranteeing to produce high-quality product, need to carry out the flame cleaning operation to slab.After the cleaning, steel slab surface can be because the position of burner stays concavo-convex vestige.Detect online the concavo-convex situation of steel slab surface, can determine on the one hand the slab subsequent flows to, also be the monitoring to deseamer burner situation on the one hand.For the subsequent flows of determining slab to and reduce the mobile operating of slab, need to sags and crests that clear up rear steel slab surface be detected.
Summary of the invention
The technical problem to be solved in the present invention is how to realize the sags and crests of steel slab surface after the flame cleaning is detected.
In order to solve this technical matters, the invention provides a kind of steel slab surface sags and crests detection method, in order to the slab after the flame cleaning is detected, provide laser line generator, CCD probe and data handling machine;
At first, so that the laser vertical that described laser line generator penetrates is mapped to described steel slab surface, form laser rays in steel slab surface;
Then, utilize described CCD probe 2 from a skew back of described laser rays to the photo of taking described laser rays and near zone thereof, and with this picture transmission in described data handling machine;
At last, described data handling machine is judged the sags and crests situation of described steel slab surface according to the crooked situation of laser rays in the photo.
Described CCD probe is 30 to 50 degree with the scope of the angle of described slab.
Described CCD probe comprises that CCD camera, camera lens and optical filter, described optical filter are installed on the described camera lens, and described camera lens is installed on the described CCD camera, and the wavelength coverage of described optical filter and the wavelength of described laser are complementary.
Described laser is one-wavelength laser, and described laser rays is along the Width setting of described slab, and the width of described laser rays is not more than 100 microns.
Described data handling machine is when judging the sags and crests situation of described steel slab surface, described photo is provided with a datum line, described datum line overlaps with the desirable laser rays of no concave-convex point situation, or be parallel to this ideal laser rays setting, the sags and crests situation of described slab can be obtained by following formula:
h=(x
1-x
2)*tgθ，
Wherein, h represents point-to-point transmissions different on the described slab relatively projection or recessed amplitude, x
1With x
2Represent respectively at these 2 to the distance of described datum line, θ represents the angle of described CCD probe and described slab.
The present invention also provides a kind of steel slab surface sags and crests pick-up unit, in order to the slab after the flame cleaning is detected, described steel slab surface sags and crests pick-up unit comprises the CCD probe, laser line generator and data handling machine, described data handling machine is connected with described CCD probe, described laser line generator is over against described slab, and the laser vertical that described laser line generator penetrates is mapped to described steel slab surface, form laser rays in steel slab surface, described CCD probe is tiltedly facing to described laser rays setting, described CCD probe is in order to take the photo of described laser rays and near zone thereof, and with this picture transmission in described data handling machine, described data handling machine is judged the sags and crests situation of described steel slab surface according to the crooked situation of laser rays in the photo.
Described CCD probe is 30 to 50 degree with the scope of the angle of described slab.
Described CCD probe comprises that CCD camera, camera lens and optical filter, described optical filter are installed on the described camera lens, and described camera lens is installed on the described CCD camera, and the wavelength coverage of described optical filter and the wavelength of described laser are complementary.
Described laser is one-wavelength laser, and the width of described laser rays is not more than 10 microns, and described laser rays is along the Width setting of described slab.
Described CCD probe is connected with power supply by a field terminal box.
The present invention also provides a kind of sags and crests disposal route of steel slab surface, adopted steel slab surface sags and crests detection method provided by the invention, and according to point-to-point transmissions different on the described slab relatively projection or recessed amplitude h carry out corresponding processing so that described steel slab surface realizes is smooth.
The present invention is used in combination the CCD probe with laser line generator, utilized the CCD probe that the laser rays that forms on the slab is taken, thereby can judge by the bending change of laser rays on slab the sags and crests situation of described steel slab surface, simultaneously, consider after the flame cleaning behind the concavo-convex vestige that slab forms, its shape is comparatively fixing, the simple combination of the laser line generator that only need to vertically inject and the CCD of oblique shooting probe just can realize the detection of steel slab surface sags and crests, and need not to utilize arranging of numerous and diverse device, just can realize the sags and crests of steel slab surface after the flame cleaning is detected.
Description of drawings
Fig. 1 is the structural representation of the steel slab surface sags and crests pick-up unit that provides of one embodiment of the invention;
Fig. 2 is the principle schematic that the sags and crests situation of described steel slab surface is provided in the steel slab surface sags and crests detection method that provides of one embodiment of the invention;
Fig. 3 is the principle schematic that the sags and crests situation of described steel slab surface is provided in the steel slab surface sags and crests detection method that provides of another embodiment of the present invention;
Among the figure, the 1-laser line generator; The 2-CCD probe; The 3-data handling machine; The 4-slab; The 5-field terminal box; The 6-power supply.
Embodiment
Below with reference to Fig. 1 and Fig. 2 steel slab surface sags and crests pick-up unit provided by the invention and method are described in detail, it is the present invention's one optional embodiment, can think those skilled in the art in the scope that does not change the present invention spirit and content, can make amendment and polish it.
Please refer to Fig. 1, and in conjunction with Fig. 2, the present embodiment provides a kind of steel slab surface sags and crests detection method, in order to the slab 4 after the flame cleaning is detected, provide laser line generator 1, CCD probe 2 and data handling machine 3;
At first, so that the laser vertical that described laser line generator 1 penetrates is mapped to described slab 4 surfaces, form laser rays on slab 4 surfaces; Under desirable state, described laser rays should be linearity;
Then, utilize described CCD probe 2 from a skew back of described laser rays to the photo of taking described laser rays and near zone thereof, and with this picture transmission in described data handling machine 3; Described CCD probe 2 any sides that can be arranged in the described laser rays both sides, perhaps a plurality of CCD probes 2 be placed in described laser rays both sides also can, but not the position at described laser rays two ends;
At last, described data handling machine 3 is judged the sags and crests situation of described steel slab surface according to the crooked situation of laser rays in the photo.
In the present embodiment, laser line generator device irradiating angle is vertical with steel slab surface, is the accuracy that guarantees to calculate, and wants machinery to guarantee when laser instrument is installed.
The present embodiment is used in combination CCD probe 2 with laser line generator 1, utilized the laser rays that forms on 2 pairs of slabs 4 of CCD probe to take, thereby can judge by the bending change of laser rays on slab 4 the sags and crests situation on described slab 4 surfaces, simultaneously, consider after the flame cleaning behind the concavo-convex vestige that slab forms, its shape is comparatively fixing, the simple combination of the laser line generator 1 that only need to vertically inject and the CCD of oblique shooting probe 2 just can realize the detection of slab 4 concave-convex surface points, and need not to utilize arranging of numerous and diverse device, just can realize the sags and crests on 4 surfaces of slab after the flame cleaning is detected.
When slab 4 surfacing, laser rays is straight line, when the surface presents when uneven, must bring bending, there is corresponding geometric relationship in degree of crook with the situation of slab 4 concave-convex surfaces, the information such as the position by the laser rays of identification on the slab 4 and shape can be converted out the position of steel slab surface.In the present embodiment, please refer to Fig. 2, described data handling machine 3 is when judging the sags and crests situation on described slab 4 surfaces, described photo is provided with a datum line, described datum line overlaps with the desirable laser rays of no concave-convex point situation, or be parallel to this theory laser rays setting, this datum line can be located at the relevant position of CCD probe, so that during the photo imaging described datum line Lock-in on described photo, also can simulate setting in data handling machine 3, the sags and crests situation of described slab 4 can be obtained by following formula:
h=(x
1-x
2)*tgθ，
Wherein, h represents point-to-point transmissions different on the described slab 4 relatively projection or recessed amplitude, x
1With x
2Represent respectively at these 2 to the distance of described datum line, θ represents the angle of described CCD probe 2 and described slab 4, that is CCD probe 2 shooting angle with respect to slab 4.
In the present invention's one preferred embodiment, described datum line overlaps x with the desirable laser rays of no concave-convex point situation
2Represent that again the point on the no concave-convex point situation part line arrives the distance of described datum line, so these data x
2Just be 0, only need x this moment
1Just can calculate the sags and crests situation.In other optional embodiments of the present invention, described datum line also can be parallel to this theory laser rays setting, at this moment, and x
2Point on the expression no concave-convex point situation part line is to the distance of described datum line, and is not 0, so, by 2 arrive datum line apart from difference at (x
1-x
2) can calculate the sags and crests situation equally, that is calculate this point-to-point transmission relatively projection or recessed amplitude.Specifically, in the present embodiment, datum line as shown in Figure 2 is parallel to desirable laser rays setting, at this moment x
2Non-vanishing, with reference to this figure, if when datum line overlaps with desirable laser rays, x
2Data will be 0, also be about to the resulting situation in position that datum line position among the figure is moved to the practical laser line to the right.
In another optional embodiment of the present invention, please refer to Fig. 3, on the described slab 42 all exist in projection or the recessed situation, if these 2 that finally record are respectively x with distance described datum line
1With x
2, then 2 relatively projection or recessed amplitude also can be by this formula h=(x
1-x
2) * tg θ determines.
So, the present embodiment is not only determined sags and crests on the corresponding slab 4 by the sweep of finding out on the laser rays, on microcosmic, measurement by range data can clearly clearly be calculated each point and the relative concavo-convex situation between other points with collection and application of formula, namely pass through these 2 with corresponding photo edge apart from x
1With x
2Obtain the concrete quantification situation of slab 4 sags and crests through the processing that quantizes, in case obtained should the quantification situation, just can carry out accordingly the processing of careful quantification to slab 4.
The present embodiment also provides a kind of sags and crests disposal route of steel slab surface, the steel slab surface sags and crests detection method that has adopted the present embodiment to provide, and according to point-to-point transmissions different on the described slab relatively projection or recessed amplitude h carry out corresponding processing so that described steel slab surface realizes is smooth.Method those skilled in the art smooth as for specific implementation can obtain some technical schemes apparently; the present embodiment need not it is carried out detailed restriction; utilize amplitude h to realize smooth effect as long as satisfy, can think that namely it does not break away from the scope of protection of the invention.
In the present embodiment, described CCD probe 2 is 30 to 50 degree with the scope of the angle of described slab 4.Described CCD probe 2 comprises CCD camera, camera lens and optical filter in the present embodiment, and described optical filter is installed on the described camera lens, and described camera lens is installed on the described CCD camera, and the wavelength coverage of described optical filter and the wavelength of described laser are complementary.In the present embodiment, also can think, when the CCD camera is installed, guarantee in the time can't determining setting angle, to calculate 30 °≤θ of CCD camera and horizontal line (slab 4 is horizontally disposed with) angulation≤45 ° by scaling method.Also be provided with CCD probe protective cover in the present embodiment on the CCD probe 2.The quantity of CCD probe 2 among the present invention; that is the quantity of CCD camera, camera lens and optical filter etc. is specifically determined according to actual conditions; namely regardless of quantity, can think that all it does not break away from the scope of protection of the invention, " two " as shown in the figure can think and are the present invention's one optional embodiment.
Described laser is one-wavelength laser, and the wavelength of this one-wavelength laser should have obvious difference with the surperficial optical wavelength of testee (being slab 4).The width of described laser rays is not more than 100 microns, and described laser rays is along the Width setting of described slab 4.In the present embodiment, install on the CCD camera for the optical filter of the one-wavelength laser co-wavelength scope of described laser, to guarantee imaging clearly.Laser line generator in the present embodiment is the high-quality laser generator.
Please refer to Fig. 1, described CCD probe 2 is connected with power supply 6 by a field terminal box 5.Power supply 6 all is positioned at operation room or electric panel room with data handling machine 3, is convenient to control.
In the clear production line of machine, the steel slab surface sags and crests pick-up unit that the present embodiment provides and method mainly detect the steel slab surface for the production of Automobile Plate.Detection width is 1300mm, and accuracy of detection can reach 0.2mm.
In sum, along with CCD(Charge Coupled Device) development of technology, the present invention proposes a kind of method that adopts image technique to detect slab concave-convex surface point.Adopt image method to detect the slab surface condition, its system architecture is easy, and usable range is wide, is convenient to promote.The present invention is mainly used in the detection of the clear rear steel slab surface situation of detection machine, in the position of detecting slab concave-convex surface point, and can also be according to the pattern of the data reduction steel slab surface that quantizes to obtain.The present invention can detect for the surface behind the slab mechanical chipping, equally also can extend to the slab manual finishing on-the-spot.
Claims (10)
1. a steel slab surface sags and crests detection method in order to the slab after the flame cleaning is detected, is characterized in that: laser line generator, CCD probe and data handling machine are provided;
At first, so that the laser vertical that described laser line generator penetrates is mapped to described steel slab surface, form laser rays in steel slab surface;
Then, utilize described CCD probe from a skew back of described laser rays to the photo of taking described laser rays and near zone thereof, and with this picture transmission in described data handling machine;
At last, described data handling machine is judged the sags and crests situation of described steel slab surface according to the crooked situation of laser rays in the photo.
2. steel slab surface sags and crests detection method as claimed in claim 1 is characterized in that: described CCD probe is 30 to 50 degree with the scope of the angle of described slab.
3. steel slab surface sags and crests detection method as claimed in claim 1, it is characterized in that: described CCD probe comprises CCD camera, camera lens and optical filter, described optical filter is installed on the described camera lens, described camera lens is installed on the described CCD camera, and the wavelength coverage of described optical filter and the wavelength of described laser are complementary.
4. steel slab surface sags and crests detection method as claimed in claim 1, it is characterized in that: described laser is one-wavelength laser, and described laser rays is along the Width setting of described slab, and the width of described laser rays is not more than 100 microns.
5. steel slab surface sags and crests detection method as claimed in claim 1, it is characterized in that: described data handling machine is when judging the sags and crests situation of described steel slab surface, described photo is provided with a datum line, described datum line overlaps with the desirable laser rays of no concave-convex point situation, or be parallel to this theory laser rays setting, the sags and crests situation of described slab can be obtained by following formula:
h=(x
1-x
2)*tgθ，
Wherein, h represents point-to-point transmissions different on the described slab relatively projection or recessed amplitude, x
1With x
2Represent respectively at these 2 to the distance of described datum line, θ represents the angle of described CCD probe and described slab.
6. steel slab surface sags and crests pick-up unit, in order to the slab after the flame cleaning is detected, it is characterized in that: comprise the CCD probe, laser line generator and data handling machine, described data handling machine is connected with described CCD probe, described laser line generator is over against described slab, and the laser vertical that described laser line generator penetrates is mapped to described steel slab surface, form laser rays in steel slab surface, described CCD probe is tiltedly facing to described laser rays setting, described CCD probe is in order to take the photo of described laser rays and near zone thereof, and with this picture transmission in described data handling machine, described data handling machine is judged the sags and crests situation of described steel slab surface according to the crooked situation of laser rays in the photo.
7. steel slab surface sags and crests pick-up unit as claimed in claim 6 is characterized in that: described CCD probe is 30 to 50 degree with the scope of the angle of described slab.
8. steel slab surface sags and crests pick-up unit as claimed in claim 6, it is characterized in that: described CCD probe comprises CCD camera, camera lens and optical filter, described optical filter is installed on the described camera lens, described camera lens is installed on the described CCD camera, and the wavelength coverage of described optical filter and the wavelength of described laser are complementary.
9. steel slab surface sags and crests pick-up unit as claimed in claim 6, it is characterized in that: described laser is one-wavelength laser, and the width of described laser rays is not more than 100 microns, and described laser rays is along the Width setting of described slab.
10. the sags and crests disposal route of a steel slab surface, it is characterized in that: adopted steel slab surface sags and crests detection method as claimed in claim 5, and according to point-to-point transmissions different on the described slab relatively projection or recessed amplitude h carry out corresponding processing so that described steel slab surface realizes is smooth.
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