CN108827178A - A kind of strip warpage detection method and system - Google Patents
A kind of strip warpage detection method and system Download PDFInfo
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- CN108827178A CN108827178A CN201810796791.1A CN201810796791A CN108827178A CN 108827178 A CN108827178 A CN 108827178A CN 201810796791 A CN201810796791 A CN 201810796791A CN 108827178 A CN108827178 A CN 108827178A
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- Prior art keywords
- strip
- wordline
- hot spot
- warpage
- detection light
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/16—Measuring arrangements characterised by the use of optical techniques for measuring the deformation in a solid, e.g. optical strain gauge
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)
- Length Measuring Devices By Optical Means (AREA)
Abstract
The invention belongs to technical field of steel rolling, disclose a kind of strip warpage detection method, including：To belt steel surface with angle α one wordline detection light of oblique projection；Obtain the bending amplitude C of the hot spot of the wordline detection light of the belt steel surface；Strip depth of camber h is acquired based on formula h=Ctan α.Strip warpage detection method and system provided by the invention, can be realized efficient warpage on-line checking.
Description
Technical field
The present invention relates to technical field of steel rolling, in particular to a kind of strip warpage detection method and system.
Background technique
Strip warpage defect is rolling/smooth, straightening, to produce plastic elongation poor for strip upper and lower surface in coiling process,
And show as bending deformation along rolling direction or width direction.
In the prior art, strip warpage defect is all made of on-line period, and the mode of offline inspection measures, and detects timeliness
Property it is poor, can not efficiently instruct the control of strip warpage to operate, cause warpage control retardance it is serious, cause a large amount of warpage defect
Strip.On the other hand, due to band in can not sample detection, only sampling inspection results can not reflect entire volume strip to strip end to end
Warpage controlled level so that measurement result is unreliable.
Summary of the invention
The present invention provides a kind of strip warpage detection method and system, solves strip warpage in the prior art and detects timeliness
Difference, the insecure technical problem of measurement result.
In order to solve the above technical problems, the present invention provides a kind of strip warpage detection methods, including：
To belt steel surface with angle α one wordline detection light of oblique projection；
Obtain the bending amplitude C of the hot spot of the wordline detection light of the belt steel surface；
Strip depth of camber h is acquired based on formula h=Ctan α.
Further, the value range 0 of the value range of the angle α<α<90°.
Further, the value range 30 of the preferred scope of the angle α<α<75°.
Further, the length of the wordline detection light is more than or equal to the width of the strip.
Further, described to include with one wordline detection light of the oblique projection of angle α to belt steel surface：
Use a wordline laser device along the strip axially or width with angle α one wordline detection light of oblique projection
Onto the strip.
Further, the bending amplitude C of the hot spot of the wordline detection light for obtaining the belt steel surface includes：
The hot spot picture is shot from right above the strip using capture apparatus；
The bending amplitude C of the hot spot in the hot spot picture is identified by image recognition apparatus.
Further, the wordline detection light is visible light.
Further, the filter with visible light cooperation is set before the capture apparatus, filters out interference light.
A kind of strip warpage detection system, including：A wordline laser device, capture apparatus and image recognition apparatus；
The a wordline laser device is arranged right above strip, oblique with angle α along the strip axially or width
To in one wordline detection light to the strip of projection；
The capture apparatus setting shoots the wordline detection light on the strip right above band detection strip
Hot spot picture；
Described image identification equipment is connected with the capture apparatus, obtains the hot spot picture, and identify the hot spot figure
The bending amplitude C and warp direction of hot spot in piece.
Further, the capture apparatus uses high speed camera.
One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages：
The strip warpage detection method provided in the embodiment of the present application, by projecting one to belt steel surface with certain angle α
Wordline detection light then obtains the bending amplitude C of detection light hot spot, and it is high then to acquire strip warpage based on formula h=Ctan α
Spend h；It is efficiently, reliable to realize strip warpage on-line checking to easy；To promote the timeliness of warpage control and reliable
Property, guarantee the quality of strip, strip quality caused by Delay control is avoided to deteriorate.Meanwhile the detection of automation can be felt in band
Universe detection, so that the reliability of strip warpage test result.
Detailed description of the invention
Fig. 1 is the schematic illustration of strip warpage detection method provided by the invention；
Fig. 2 is strip warpage detection system structure provided by the invention；
Fig. 3 is the hot spot schematic diagram of wordline detection light provided by the invention；
Fig. 4 is hot spot picture provided by the invention；
Fig. 5 is spot identification result schematic diagram provided by the invention.
Specific embodiment
The embodiment of the present application solves strip warpage in the prior art by providing a kind of strip warpage detection method and system
Detect poor in timeliness, the insecure technical problem of measurement result.
In order to better understand the above technical scheme, in conjunction with appended figures and specific embodiments to upper
It states technical solution to be described in detail, it should be understood that the specific features in the embodiment of the present invention and embodiment are to the application skill
The detailed description of art scheme, rather than the restriction to technical scheme, in the absence of conflict, the embodiment of the present application
And the technical characteristic in embodiment can be combined with each other.
Referring to Fig. 1 and Fig. 2, the present embodiment provides a kind of strip warpage detection methods, including：
To 1 surface of strip with angle α one wordline detection light of oblique projection；
Obtain the bending amplitude C of the hot spot 4 of the wordline detection light on 1 surface of strip；
Strip depth of camber h is acquired based on formula h=Ctan α.
Referring to figs. 2 and 3,1 surface of wordline detection light head portrait strip, if strip is straight, strip 1
On the straight straight line of hot spot liquid level；But when strip warpage, then different piece reaches belt steel surface in a wordline detection light
Distance will be different so that the or not hot spot of a wordline detection light will will appear deformation.
Specifically, warpage portion and light source are closer, then the hot spot of corresponding part leans on close to sources, and so on,
Distance of the hot spot on strip will be different, and the line of deformation will be will appear by connecting into line；And light closest and farthest away from strip
Spot directly reacts highest point and the strip minimum point of warpage, thus based on distance C, depth of camber h and detection light between the two
Projection track just form right angle triangle form, Given this obtain formula h=Ctan α.
In general, the value range 0 of the value range of the angle α<α<90°.Oblique incidence, model layer can be formed
Shape of triangle.
In view of the width of strip vibration and detection light, the value range 30 of the preferred scope of the angle α<α<75°.Energy
Enough quality for guaranteeing hot spot form to greatest extent, enable hot spot to expand more preferable, while width is also relatively smaller, from
And guarantee the precision of quantization measurement.
In general, the length of the wordline detection light is more than or equal to the width of the strip, convenient for complete measurement.
Specifically, described to include with one wordline detection light of the oblique projection of angle α to belt steel surface：
Use a wordline laser device along the strip axially or width with angle α one wordline detection light of oblique projection
Onto the strip.
In view of strip in producing line by tension force effect, warpage shows as cupping, therefore, a wordline detection light at this time
Along axial projection.
Correspondingly, being directed to lonitudinal warping, crevice projection angle adjusts 90 degree；Such situation spininess puts steel or quiet to strip
In the case of state.
The bending amplitude C of the hot spot of the wordline detection light for obtaining the belt steel surface includes：
The hot spot picture is shot from right above the strip using capture apparatus；
The bending amplitude C of the hot spot in the hot spot picture is identified by image recognition apparatus.
When in general, in order to guarantee on-line measurement, high speed camera is can be used in the reliability of information capture, is obtained reliable
Hot spot picture；Such as CCD or CMOS.
Correspondingly, image recognition apparatus, that is, be equipped with the computer equipment of image identification system, calculate hot spot for identification
Bending amplitude.
In general for the ease of measurement, the wordline detection light is visible light.
Further, the filter with visible light cooperation is set before the capture apparatus, filters out interference light.
Referring to fig. 4 and Fig. 5, width are the warpage defects detection of 1048mm strip as a result, by identification and conversion, it is known that band
Steel, which exists, upwarps defect, depth of camber 0.98mm.
The present embodiment also provides a kind of strip warpage detection system based on the above method, including：A wordline laser device is clapped
Take the photograph equipment and image recognition apparatus.
The a wordline laser device is arranged right above strip, oblique with angle α along the strip axially or width
To in one wordline detection light to the strip of projection；
The capture apparatus setting shoots the wordline detection light on the strip right above band detection strip
Hot spot picture；
Described image identification equipment is connected with the capture apparatus, obtains the hot spot picture, and identify the hot spot figure
The bending amplitude C and warp direction of hot spot in piece.
It is worth noting that setting height h2 and capture apparatus 2 of a wordline laser device 3 relative to strip 1 plate face
Height h is set1The flexible setting all premised on it can completely cover belt steel surface and complete acquisition hot spot.Correspondingly, between the two
Spacing L also based onIt is adjusted flexibly.
One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages：
The strip warpage detection method provided in the embodiment of the present application, by projecting one to belt steel surface with certain angle α
Wordline detection light then obtains the bending amplitude C of detection light hot spot, and it is high then to acquire strip warpage based on formula h=Ctan α
Spend h；It is efficiently, reliable to realize strip warpage on-line checking to easy；To promote the timeliness of warpage control and reliable
Property, guarantee the quality of strip, strip quality caused by Delay control is avoided to deteriorate.Meanwhile the detection of automation can be felt in band
Universe detection, so that the reliability of strip warpage test result.
It should be noted last that the above specific embodiment is only used to illustrate the technical scheme of the present invention and not to limit it,
Although being described the invention in detail referring to example, those skilled in the art should understand that, it can be to the present invention
Technical solution be modified or replaced equivalently, without departing from the spirit and scope of the technical solution of the present invention, should all cover
In the scope of the claims of the present invention.
Claims (10)
1. a kind of strip warpage detection method, which is characterized in that including：
To belt steel surface with angle α one wordline detection light of oblique projection；
Obtain the bending amplitude C of the hot spot of the wordline detection light of the belt steel surface；
Strip depth of camber h is acquired based on formula h=Ctan α.
2. strip warpage detection method as described in claim 1, it is characterised in that：The value of the value range of the angle α
Range 0<α<90°.
3. strip warpage detection method as claimed in claim 2, it is characterised in that：The value of the preferred scope of the angle α
Range 30<α<75°.
4. strip warpage detection method as described in claim 1, it is characterised in that：The length of the one wordline detection light is greater than
Equal to the width of the strip.
5. strip warpage detection method as described in claim 1, which is characterized in that described oblique with angle α to belt steel surface
Projecting a wordline detection light includes：
Use a wordline laser device along the strip axially or width with angle α one wordline detection light of oblique projection to institute
It states on strip.
6. strip warpage detection method as claimed in claim 5, which is characterized in that described to obtain the described of the belt steel surface
The bending amplitude C of the hot spot of one wordline detection light includes：
The hot spot picture is shot from right above the strip using capture apparatus；
The bending amplitude C of the hot spot in the hot spot picture is identified by image recognition apparatus.
7. strip warpage detection method as claimed in claim 6, it is characterised in that：The one wordline detection light is visible light.
8. strip warpage detection method as claimed in claim 7, it is characterised in that：Before the capture apparatus setting with it is described can
The filter of light-exposed cooperation filters out interference light.
9. a kind of strip warpage detection system, which is characterized in that including：A wordline laser device, capture apparatus and image recognition
Equipment；
The a wordline laser device is arranged right above strip, along the strip axially or width with the oblique throwing of angle α
It penetrates in a wordline detection light to the strip；
The capture apparatus setting shoots the hot spot of the wordline detection light on the strip right above band detection strip
Picture；
Described image identification equipment is connected with the capture apparatus, obtains the hot spot picture, and identify in the hot spot picture
Hot spot bending amplitude C and warp direction.
10. strip warpage detection system as claimed in claim 9, it is characterised in that：The capture apparatus uses high speed camera.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810796791.1A CN108827178A (en) | 2018-07-19 | 2018-07-19 | A kind of strip warpage detection method and system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810796791.1A CN108827178A (en) | 2018-07-19 | 2018-07-19 | A kind of strip warpage detection method and system |
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| CN108827178A true CN108827178A (en) | 2018-11-16 |
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| CN201810796791.1A Pending CN108827178A (en) | 2018-07-19 | 2018-07-19 | A kind of strip warpage detection method and system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112199832A (en) * | 2020-09-29 | 2021-01-08 | 首钢集团有限公司 | Strip steel warping height online evaluation method and device |
| CN112964178A (en) * | 2021-02-07 | 2021-06-15 | 佛山科学技术学院 | Amorphous strip transmission position measuring method and device |
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| CN101530864A (en) * | 2008-03-14 | 2009-09-16 | 株式会社英田精密机械 | Shape calculating system |
| CN104315991A (en) * | 2014-10-31 | 2015-01-28 | 合肥鑫晟光电科技有限公司 | Device and method for measuring warping degree of substrate, touch screen and manufacturing method of touch screen |
| EP2913631A1 (en) * | 2014-02-27 | 2015-09-02 | Ricoh Company, Ltd. | Test apparatus and method |
| CN105806247A (en) * | 2016-05-23 | 2016-07-27 | 南京林业大学 | Wood board warping online detection device and detection method |
| CN107388962A (en) * | 2017-07-06 | 2017-11-24 | 南京林业大学 | A kind of on-line measuring device and detection method of wooden boards warpage |
| CN107787438A (en) * | 2016-06-27 | 2018-03-09 | 新日铁住金株式会社 | Shape measuring apparatus and process for measuring shape |
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- 2018-07-19 CN CN201810796791.1A patent/CN108827178A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101530864A (en) * | 2008-03-14 | 2009-09-16 | 株式会社英田精密机械 | Shape calculating system |
| EP2913631A1 (en) * | 2014-02-27 | 2015-09-02 | Ricoh Company, Ltd. | Test apparatus and method |
| CN104315991A (en) * | 2014-10-31 | 2015-01-28 | 合肥鑫晟光电科技有限公司 | Device and method for measuring warping degree of substrate, touch screen and manufacturing method of touch screen |
| CN105806247A (en) * | 2016-05-23 | 2016-07-27 | 南京林业大学 | Wood board warping online detection device and detection method |
| CN107787438A (en) * | 2016-06-27 | 2018-03-09 | 新日铁住金株式会社 | Shape measuring apparatus and process for measuring shape |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112199832A (en) * | 2020-09-29 | 2021-01-08 | 首钢集团有限公司 | Strip steel warping height online evaluation method and device |
| CN112964178A (en) * | 2021-02-07 | 2021-06-15 | 佛山科学技术学院 | Amorphous strip transmission position measuring method and device |
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Application publication date: 20181116 |