CN110645896A - Strip steel fiber strip length measuring method and measuring device - Google Patents
Strip steel fiber strip length measuring method and measuring device Download PDFInfo
- Publication number
- CN110645896A CN110645896A CN201910777867.0A CN201910777867A CN110645896A CN 110645896 A CN110645896 A CN 110645896A CN 201910777867 A CN201910777867 A CN 201910777867A CN 110645896 A CN110645896 A CN 110645896A
- Authority
- CN
- China
- Prior art keywords
- strip steel
- strip
- length
- laser
- axis
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000010959 steel Substances 0.000 title claims abstract description 121
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 118
- 239000000835 fiber Substances 0.000 title claims abstract description 46
- 238000000034 method Methods 0.000 title claims abstract description 25
- 238000003384 imaging method Methods 0.000 claims abstract description 8
- 230000000694 effects Effects 0.000 claims description 4
- 230000007935 neutral effect Effects 0.000 claims description 3
- 238000006748 scratching Methods 0.000 abstract description 2
- 230000002393 scratching effect Effects 0.000 abstract description 2
- 238000005259 measurement Methods 0.000 description 10
- 238000006073 displacement reaction Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
Images
Classifications
-
- 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
- G01B11/02—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness
- G01B11/04—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness specially adapted for measuring length or width of objects while moving
- G01B11/043—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness specially adapted for measuring length or width of objects while moving for measuring length
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Length Measuring Devices By Optical Means (AREA)
Abstract
The invention discloses a strip steel fiber strip length measuring method and a measuring device, which calculate the length of a fiber strip in the width direction of the strip steel by measuring the change of the thickness direction of the strip steel, concretely, the strip steel is regarded as a whole consisting of N continuous fiber strips, laser emitted by a laser is projected on the surface of the strip steel to form a light spot B, the light spot moves to A after the thickness of the strip steel is changed due to pressure processing deformation, and on a photosensitive element of a receiver, an imaging point moves to A ' from B ', the relation between the thickness variation h of the strip steel and the moving distance h ' of the imaging point can be obtained according to the geometric relation, and then the length of the strip steel fiber strip can be calculated through the thickness variation h. The invention makes up the blank that the original device without professional measures the length of the band steel fiber strip, and the laser and the receiver do not contact with the surface of the band steel plate, thereby avoiding scratching the surface of the band steel plate. In addition, the interference caused by the vibration or swing of the strip steel can be eliminated by setting the precision of the laser and the receiver.
Description
Technical Field
The invention relates to the field of non-contact measurement, in particular to a method and a device for measuring the length of a strip steel fiber strip.
Background
Materials like steel strips are often processed by rolling or straightening and other pressure processing methods, when the processing parameters are accurately selected, the steel strips are often regarded as a whole consisting of N continuous fiber strips, and all fiber layers always keep a dynamic balance on the same section during the pressure processing, and the balance equation is as follows:
the continuous fiber strips are stressed and pulled, so that the continuous fiber strips are different in length, the fiber strips with different lengths can cause the problems of wave-shaped defects, uneven distribution of residual stress and the like, the processing precision of pressure processing needs to be improved or the subsequent process needs to be improved, but no detection device can measure the length of the continuous fiber strips at present, and reference factors are provided for the subsequent or early-stage pressure processing.
Disclosure of Invention
In order to solve the problems, and in consideration of the fact that when the strip steel is very thin, the length of the fiber strips in the width direction of the strip steel is difficult to directly and dynamically measure, the invention provides a method and a device for measuring the length of the fiber strips in the width direction of the strip steel based on an optical principle, the method and the device for measuring the length of the fiber strips in the width direction of the strip steel are used for measuring the change in the thickness direction of the strip steel, the method is a non-contact measuring method, and the measurement is simple and fast, and concretely comprises the following steps:
s1, establishing a three-dimensional coordinate system by taking a certain point O on the surface of the strip steel as a center, wherein the x axis of the three-dimensional coordinate system is parallel to the length direction of the strip steel, the y axis of the three-dimensional coordinate system is parallel to the width direction of the strip steel, and the z axis of the three-dimensional coordinate system is parallel to the thickness direction of the strip steel; the strip steel is regarded as a whole consisting of N continuous fiber strips, the length direction of the strip steel fiber strips is parallel to the y axis, the width direction is parallel to the z axis, and the thickness direction is parallel to the z axis;
s2, the laser emitted by the laser is projected to the surface of the strip steel to form a light spot B, and the thickness of the strip steel is changed from z due to pressure processing deformationi-1Becomes ziWhen the light spot moves to A, the imaging point moves from B 'to A' on the photosensitive element of the receiver, and the thickness variation h of the strip steel is | zi-zi-1The relationship between | and the moving distance h' of the imaging point is:
in the formula, k1、k2And k3Respectively representing the rigidity influence coefficients of the strip steel in the directions of an x axis, a y axis and a z axis;
s3, the strip steel is usually transported in the continuous pressure processing processIn motion, when the strip moves in the direction of the x-axis, at time t1，t2，…，tnThe thickness variation h ═ z of the strip is obtained by the equation (1)i-zi-1And then calculating the length L of the strip steel fiber strip according to the following formula:
in the formula, viFor measuring thickness z of stripiThe moving speed of the strip steel is measured, and n is the number of the measuring points.
Further, the stress and the strain neutral layer of the strip steel are overlapped in the pressure deformation process, so that the strip steel cannot deviate in the pressure deformation process, and the length of the middle deformation area of the strip steel is within half of the whole length; setting the length of the strip steel as l, after pressure deformation, the length extension variation of the strip steel as delta l, and the ratio of the width extension variation to the length extension variation as lambda;
because mutually balanced internal forces exist in all directions in the strip steel, the elongation of the strip steel is influenced by the rigid end effect in three directions, and the influence coefficient k of the rigidity of the strip steel1、k2And k3Respectively as follows:
further, if the width value of the strip steel fiber strip is larger, the number n of the measurement points is larger, and the length L of the strip steel fiber strip calculated by the formula (2) is more accurate.
The invention provides a strip steel fiber strip length measuring device which comprises a laser, a receiver, a lens, a camera lens and a color filter, wherein the laser is movably arranged above strip steel, the moving direction of the laser is parallel to a y axis, the lens is arranged between the laser emitting end of the laser and the strip steel, the camera lens is arranged between the receiving end of the receiver and the strip steel, and the color filter is arranged between the camera lens and the receiver; the laser emitted by the laser is projected to the surface of the strip steel through the lens to form light spots, and the laser reflected by the surface of the strip steel is imaged on the receiver through the camera lens and the color filter respectively.
The invention has the beneficial effects that: the invention makes up the blank that the prior professional device is not used for measuring the length of the fiber strips of the strip steel, and the laser and the receiver are not contacted with the surface of the strip steel plate, thereby avoiding scratching the surface of the strip steel plate. In addition, the interference caused by the vibration or swing of the strip steel can be eliminated by setting the precision of the laser and the receiver.
Drawings
FIG. 1 is a schematic illustration of the division of the strip steel fiber strip of the present invention;
FIG. 2 is a strip length distribution plot of the present invention;
FIG. 3 is a schematic view showing the measurement of the thickness variation of the strip steel according to the present invention;
FIG. 4 is a fiber strip length distribution plot after rolling of the inventive strip;
reference numerals: 1-laser, 2-lens, 3-photosensitive element, 4-color filter, 5-camera lens.
Detailed Description
In order to more clearly understand the technical features, objects, and effects of the present invention, embodiments of the present invention will now be described with reference to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the preferred embodiment of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
The embodiment provides a strip steel fiber strip length measuring method and a measuring device, wherein the length of a fiber strip in the width direction of strip steel is calculated by measuring the change of the thickness direction of the strip steel, and the specific measuring method comprises the following steps:
s1, as shown in a figure 1, establishing a three-dimensional coordinate system by taking a certain point O on the surface of strip steel as a center, wherein the x axis of the three-dimensional coordinate system is parallel to the length direction of the strip steel, the y axis of the three-dimensional coordinate system is parallel to the width direction of the strip steel, the z axis of the three-dimensional coordinate system is parallel to the thickness direction of the strip steel, the strip steel is regarded as a whole consisting of N continuous fiber strips, the length direction of the fiber strips of the strip steel is parallel to the y axis, the width direction of the fiber strips of the strip steel is parallel to the z axis, and the thickness direction;
s2, as shown in figure 3, which is a schematic diagram for measuring thickness variation of the strip steel of the embodiment, laser emitted by a laser 1 is projected to the surface of the strip steel through a lens 2 to form a light spot B, the laser reflected by the surface of the strip steel is imaged on a photosensitive element 3 of a receiver through a camera lens 5 and a color filter 4, and the thickness of the strip steel is deformed by pressure processing from zi-1Becomes ziWhen the light spot moves to A, the imaging point moves from B 'to A' on the photosensitive element 3 of the receiver, and the thickness variation h of the strip steel is | zi-zi-1The relationship between | and the moving distance h' of the imaging point is:
in the formula, k1、k2And k3Respectively representing the rigidity influence coefficients of the strip steel in the directions of an x axis, a y axis and a z axis;
s3, because the strip steel is always moved in the continuous pressure processing process, when the strip steel moves along the direction of the x axis, the strip steel moves at the moment t1，t2，…，tnThe thickness variation h ═ z of the strip is obtained by the equation (1)i-zi-1And then calculating the length L of the strip steel fiber strip according to the following formula:
in the formula, viFor measuring thickness z of stripiThe moving speed of the strip steel is measured, and n is the number of the measuring points.
Based on the measuring method, the stress and the strain neutral layer of the strip steel are overlapped in the pressure deformation process, no deviation occurs in the pressure deformation process, the length of the middle deformation area of the strip steel is within half of the whole length, the length of the strip steel is set to be l, the length extension variation of the strip steel is set to be delta l after the pressure deformation, and the ratio of the width extension variation to the length extension variation is set to be lambda. Because mutually balanced internal forces exist in all directions in the strip steel, the elongation of the strip steel is influenced by the rigid end effect in three directions, and the influence coefficient k of the rigidity of the strip steel1、k2And k3Respectively as follows:
in step 1, if the width of the strip steel fiber strip is larger, the number n of the measurement points is larger, and the length L of the strip steel fiber strip calculated by the formula (2) is more accurate, for example, if the strip steel has 99 measurement points in the x-axis direction and 33 fiber strips are divided, each fiber strip has 3 measurement points, for example, three measurement points 7,8, and 9, on one fiber strip, and when L is calculated by the above formula, although the measurement points are 7,8, and 9, i is still 1, and n is 3.
After a certain strip steel is rolled, the length distribution of the fiber strips shown in the figure 4 can be obtained after the measurement and calculation by the measuring method, and the strip steel is straightened by the continuous staggered rollers after being rolled.
In this embodiment, the laser 1 may be a linear laser displacement sensor, which can realize dynamic output of displacement through a high-precision grating grid on the photosensitive element 3, and more specifically, the laser 1 may be a BANNER — L-GAGE series high-precision laser displacement sensor, and the photosensitive element 3 may be a SICK (schke) high-precision laser measuring instrument, which may be OD2-N250W 150.
The foregoing is illustrative of the preferred embodiments of this invention, and it is to be understood that the invention is not limited to the precise form disclosed herein and that various other combinations, modifications, and environments may be resorted to, falling within the scope of the concept as disclosed herein, either as described above or as apparent to those skilled in the relevant art. And that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships conventionally placed when the present invention is used, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
Claims (4)
1. A strip steel fiber strip length measuring method is characterized by comprising the following steps:
s1, establishing a three-dimensional coordinate system by taking a certain point O on the surface of the strip steel as a center, wherein the x axis of the three-dimensional coordinate system is parallel to the length direction of the strip steel, the y axis of the three-dimensional coordinate system is parallel to the width direction of the strip steel, and the z axis of the three-dimensional coordinate system is parallel to the thickness direction of the strip steel; the strip steel is regarded as a whole consisting of N continuous fiber strips, the length direction of the strip steel fiber strips is parallel to the y axis, the width direction is parallel to the z axis, and the thickness direction is parallel to the z axis;
s2, the laser emitted by the laser is projected to the surface of the strip steel to form a light spot B, and the thickness of the strip steel is changed from z due to pressure processing deformationi-1Becomes ziWhen the light spot moves to A, the imaging point moves from B 'to A' on the photosensitive element of the receiver, and the thickness variation h of the strip steel is | zi-zi-1The relationship between | and the moving distance h' of the imaging point is:
in the formula, k1、k2And k3Respectively representing the rigidity influence coefficients of the strip steel in the directions of an x axis, a y axis and a z axis;
s3, in the continuous pressure processing process of the strip steel, when the strip steel moves along the x-axis direction, at the moment t1，t2，…，tnThe thickness variation h ═ z of the strip is obtained by the equation (1)i-zi-1And then calculating the length L of the strip steel fiber strip according to the following formula:
in the formula, viFor measuring thickness z of stripiThe moving speed of the strip steel is measured, and n is the number of the measuring points.
2. The method of claim 1, wherein the strip steel fiber strip length is within half of the whole length of the strip steel, and the stress and strain neutral layer overlap during the pressure deformation process, so that the strip steel does not shift during the pressure deformation process; the length of the strip steel is l, the length extension variation of the strip steel after pressure deformation is delta l, and the ratio of the width extension variation to the length extension variation is lambda;
because mutually balanced internal forces exist in all directions in the strip steel, the elongation of the strip steel is influenced by the rigid end effect in three directions, and the influence coefficient k of the rigidity of the strip steel1、k2And k3Respectively as follows:
3. the method of claim 1, wherein if the width of the strip steel fiber strip increases, the number of the measuring points n is correspondingly increased, so that the length L of the strip steel fiber strip calculated by the formula (2) is more accurate.
4. The measuring device for the strip steel fiber length measuring method according to claim 1, characterized by comprising a laser, a receiver, a lens, a camera lens and a color filter, wherein the laser is movably arranged above the strip steel, the moving direction of the laser is parallel to the y axis, the lens is arranged between the laser emitting end of the laser and the strip steel, the camera lens is arranged between the receiving end of the receiver and the strip steel, and the color filter is arranged between the camera lens and the receiver; the laser emitted by the laser is projected to the surface of the strip steel through the lens to form light spots, and the laser reflected by the surface of the strip steel is imaged on the receiver through the camera lens and the color filter respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910777867.0A CN110645896B (en) | 2019-08-22 | 2019-08-22 | Strip steel fiber strip length measuring method and measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910777867.0A CN110645896B (en) | 2019-08-22 | 2019-08-22 | Strip steel fiber strip length measuring method and measuring device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110645896A true CN110645896A (en) | 2020-01-03 |
| CN110645896B CN110645896B (en) | 2021-04-20 |
Family
ID=68990280
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910777867.0A Expired - Fee Related CN110645896B (en) | 2019-08-22 | 2019-08-22 | Strip steel fiber strip length measuring method and measuring device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110645896B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004061273A (en) * | 2002-07-29 | 2004-02-26 | Sumitomo Metal Ind Ltd | Steel product length measuring device and steel product dimension control method using the device |
| CN103240283A (en) * | 2012-02-08 | 2013-08-14 | 宝山钢铁股份有限公司 | Automatic band steel width detecting method |
| CN103727876A (en) * | 2013-12-20 | 2014-04-16 | 西安理工大学 | Strip width and center measurement system and method based on parallel laser rays |
| EP2745945A1 (en) * | 2012-02-20 | 2014-06-25 | Salzgitter Mannesmann Grobblech GmbH | Method and apparatus for non-contact geometric measurement of an object to be measured |
| CN105547167A (en) * | 2016-03-11 | 2016-05-04 | 中冶赛迪电气技术有限公司 | Strip steel width measuring system and method based on machine vision |
| CN106392187A (en) * | 2016-06-22 | 2017-02-15 | 河北钢铁股份有限公司邯郸分公司 | Position-based steel rail length measurement system and measurement method |
| CN206019581U (en) * | 2016-03-07 | 2017-03-15 | 首钢京唐钢铁联合有限责任公司 | Strip steel wave height on-line measuring device |
-
2019
- 2019-08-22 CN CN201910777867.0A patent/CN110645896B/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004061273A (en) * | 2002-07-29 | 2004-02-26 | Sumitomo Metal Ind Ltd | Steel product length measuring device and steel product dimension control method using the device |
| CN103240283A (en) * | 2012-02-08 | 2013-08-14 | 宝山钢铁股份有限公司 | Automatic band steel width detecting method |
| EP2745945A1 (en) * | 2012-02-20 | 2014-06-25 | Salzgitter Mannesmann Grobblech GmbH | Method and apparatus for non-contact geometric measurement of an object to be measured |
| CN103727876A (en) * | 2013-12-20 | 2014-04-16 | 西安理工大学 | Strip width and center measurement system and method based on parallel laser rays |
| CN206019581U (en) * | 2016-03-07 | 2017-03-15 | 首钢京唐钢铁联合有限责任公司 | Strip steel wave height on-line measuring device |
| CN105547167A (en) * | 2016-03-11 | 2016-05-04 | 中冶赛迪电气技术有限公司 | Strip steel width measuring system and method based on machine vision |
| CN106392187A (en) * | 2016-06-22 | 2017-02-15 | 河北钢铁股份有限公司邯郸分公司 | Position-based steel rail length measurement system and measurement method |
Non-Patent Citations (2)
| Title |
|---|
| FOJTIK: "Measurement of the volume of material on the Conveyor Belt measuring of the volume of wood chips during transport on the Conveyor Belt using a laser scanning", 《2014INTERNATIONAL CARPATHIAN CONTROL CONFERENCE》 * |
| 包仁人: "超宽冷连轧机带钢复杂板形的特征分析与控制", 《中国博士学位论文全文数据库 工程科技Ⅰ辑》 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110645896B (en) | 2021-04-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CA2682635C (en) | Method for measuring the roundness of round profiles | |
| JP4690727B2 (en) | Optical shape measurement method | |
| TW408045B (en) | Bending order selecting method and apparatus of a bending machine | |
| CN111598931B (en) | Monocular vision system imaging parameter calibration device and method | |
| CN103379277A (en) | Ranging apparatus, ranging method and imaging system | |
| CN110645896B (en) | Strip steel fiber strip length measuring method and measuring device | |
| EP2314984B1 (en) | Form measuring device and method of aligning form data | |
| CN110940283B (en) | High-precision measurement method for tooth pitch deviation and tooth profile deviation of tiny gear based on white light interferometer | |
| CN110631487B (en) | Method for measuring transverse micrometric displacement by utilizing laser speckle autocorrelation technology | |
| JP3262884B2 (en) | Shape evaluation method | |
| CN106959079A (en) | A kind of modified focuses on 3 D measuring method | |
| JP2004205447A (en) | Jig for measuring distances between roll and object and method for measuring distance | |
| JP2885422B2 (en) | Shape evaluation device and shape evaluation method | |
| JP4634657B2 (en) | Calibration method for surface texture measuring device | |
| CN109887037B (en) | Calibration method suitable for oblique laser interferometry lens imaging distortion | |
| JP3821908B2 (en) | Method for measuring surface shape of flat plate with deflection | |
| JPH06273162A (en) | Flatness measuring device | |
| JP3415921B2 (en) | Length or distance measurement method and calibration jig for measurement | |
| JP2003121131A (en) | Measuring method for straightness by scanning gap amount detection | |
| CN107424164A (en) | A kind of Image Edge-Detection Accuracy Assessment | |
| JP2988645B2 (en) | Measurement method of sheet material distortion shape | |
| CN118857935A (en) | Method for measuring plastic strain ratio of metal plate based on digital image correlation | |
| JP4323268B2 (en) | Shape measuring device, shape measuring method, shape analyzing device | |
| JP2005016956A (en) | Surface distortion distribution measuring method | |
| JP2002156223A (en) | Method for autonomously determining system error in surface shape measuring system using specimen for calibration |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20210420 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |