CN104819791B - A kind of fiber-optic grating sensor for measuring contact stress at Interface of Rolling - Google Patents
A kind of fiber-optic grating sensor for measuring contact stress at Interface of Rolling Download PDFInfo
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- CN104819791B CN104819791B CN201510193289.8A CN201510193289A CN104819791B CN 104819791 B CN104819791 B CN 104819791B CN 201510193289 A CN201510193289 A CN 201510193289A CN 104819791 B CN104819791 B CN 104819791B
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- optical fiber
- fiber
- rolling
- roll
- interface
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Abstract
The invention discloses a kind of fiber-optic grating sensor for measuring contact stress at Interface of Rolling, including roll；Roller surface is provided with a stepped bore, the vertical roller axis direction one side of stepped bore, while being milled with slit；Fiber grating strain flower is pasted onto at slit；Chock is located at the upper part of stepped bore；It is provided with stepped bore at the elongated hole at one to roll axis, roll operation side axle line and is provided with a hole and elongated hole insertion；Fiber grating strain flower is connected by optical cable with optical fiber collimator A；Optical fiber collimator A is fixed on by collimater fixes sleeve at the aperture of roll operation side axle line；Optical fiber collimator B is arranged on three-dimensional micro-displacement regulating platform；Optical fiber collimator B is then connected to optical fiber raster wavelength demodulator；Optical fiber raster wavelength demodulator connects computer.The present invention by measuring direct stress and shear stress at Interface of Rolling indirectly, it is to avoid impression is left in strip and disturbance will not be produced to the friction at Interface of Rolling and lubrication.
Description
Technical field
The present invention relates to board rolling field, specifically a kind of optical fiber grating sensing for measuring contact stress at Interface of Rolling
Device.
Background technology
In plate strip rolling process, the thickness of rolled piece is reduced using two rolls as instrument.Current rolling trend
For：Higher mill speed, bigger drafts, harder steel grade grade and thinner Strip.In order to ensure more preferable
Product quality, especially in thickness, these aspects such as flatness and defect-free surface, friction and lubrication knowledge in roll gap become outstanding
For key, therefore require to know direct stress and shear stress at the contact position between strip and roll.The contact measured at roll gap should
Power, so as to obtain the optimized parameter of mill speed and lubrication, this is always the importance in rolling field.
The sensor main of Interface of Rolling contact stress will have three kinds in measurement plate strip rolling process at present：
The first is the sensor of direct needle-like, mainly using the needle for measuring blood pressue of two sectional dimension very littles come direct measurement
Normal pressure and shear stress, the key constraints of this sensor are that needle for measuring blood pressue is directly contacted with strip, can be left in strip
Impression, and in order to be able to preferably accurately measuring strain, the ratio of rigidity at needle for measuring blood pressue is relatively low, can cause in rolling than around
The higher elastic deformation of roll, so that can andfrictional conditions at Interface of Rolling be produced with certain disturbance；
For second size than contact arc length also big units of measurement pressure and frictional force sensor, from the side,
It is frame-type, has two columns, each column is equipped with two deformeters for measuring vertically and horizontally stress, according to sensor
Into the change in location and four measurement signals of deformeter of work roll gap, so that it may determine the list on each position on contact arc
Position pressure and frictional force；This sensor overcomes the local of above-mentioned needle for measuring blood pressue and crosses problem on deformation, but is due to the sensor
It can be in contact with strip, impression is left so as to can also be taken in milled sheet；
The third is roll sensor, roll inherently sensor, by measuring in the operation of rolling inside working roll not
With the elastic strain of roll at position, and a kind of mechanical back analysis is applied, direct stress at Interface of Rolling can be recalculated
And shear stress；The maximum benefit of the sensor is but the contact stress at measurement Interface of Rolling indirectly without direct contact plate band,
So as to avoid the disturbance left a trace in strip and to rubbing and lubricating at roll gap.
At present, roll sensor only pastes strain gauge to realize in experimental mill topping roll edge, and on industrial rolling mills,
Roll is wider than strip, and roll edge is not contacted with strip.
The content of the invention
It is an object of the invention to provide a kind of fiber-optic grating sensor for measuring contact stress at Interface of Rolling, by surveying
The strain of amount roll inner elastomeric obtains Interface of Rolling contact stress so as to inverting backstepping, without direct contact plate band, so as to avoid
Impression is left in strip and disturbance will not be produced to friction at Interface of Rolling and lubrication.
To achieve the above object, the present invention provides following technical scheme：
A kind of fiber-optic grating sensor for measuring contact stress at Interface of Rolling, including fiber grating strain flower, roll, plug
Block, optical cable, optical fiber collimator A, collimater fixes sleeve, optical fiber collimator B and three-dimensional micro-displacement regulating platform；The roller surface
Rolling overlying regions be provided with a stepped bore；The vertical roller axis direction one side of the stepped bore is put down by milling, while milling
There is slit；The fiber grating strain flower is pasted onto at slit；The chock is located at the upper part of stepped bore；The stairstepping
It is provided with inside hole at the elongated hole at one to roll axis, the roll operation side axle line and is provided with one and the elongated hole insertion
Hole；One end of the optical cable is connected with fiber grating strain flower, and the other end of the optical cable is connected with optical fiber collimator A；It is described
Optical fiber collimator A is fixed on by collimater fixes sleeve at the aperture of roll operation side axle line；The optical fiber collimator B is installed
On three-dimensional micro-displacement regulating platform, B8 pairs of optical fiber collimator A6 and optical fiber collimator are ensured by three-dimensional micro-displacement regulating platform
It is accurate；The optical fiber collimator B is then connected to optical fiber raster wavelength demodulator；The optical fiber raster wavelength demodulator connection is calculated
Machine.
It is used as further scheme of the invention：The fiber grating strain flower is 45 ° of right angle strain rosette, on an optical fiber
Realize that 3 FBG of quasi- distribution are made.
It is used as further scheme of the invention：The fiber grating strain flower is pasted onto at roller surface 3mm.
It is used as further scheme of the invention：Space, the space are left between the fiber grating strain flower and optical cable
Place is filled with resin.
It is used as further scheme of the invention：The chock is connected by screw with roll.
It is used as further scheme of the invention：After the chock is finished with roll cooperation, chock surface is ground smooth.
It is used as further scheme of the invention：Its method of testing is：The light letter that the optical fiber raster wavelength demodulator is sent
Number optical fiber collimator A is sent to by optical fiber collimator B, then is sent to fiber grating strain flower, the fiber grating strain flower
The optical signal of specific wavelength is reflected back again by optical fiber collimator A to optical fiber collimator B, optic fiber grating wavelength demodulation is resent to
Device, the optical fiber raster wavelength demodulator is connected with computer.
Compared with prior art, the beneficial effects of the invention are as follows：The present invention should for a kind of Interface of Rolling contact of measurement indirectly
The method of power, by measuring the strain of roll inner elastomeric so as to which inverting backstepping obtains the direct stress and shear stress at Interface of Rolling,
The fiber grating strain flower inside direct contact plate band, and insertion is not needed not change as-rolled condition, so as to avoid in plate
Take and leave impression and disturbance will not be produced to the friction at Interface of Rolling and lubrication.The present invention can realize that measurement is rolled in real time
The direct stress and shear stress of interface processed, tentatively can realize the measurement to contact stress at Interface of Rolling on industrial rolling mills.
Brief description of the drawings
Fig. 1 is a kind of overall structure diagram for measuring the fiber-optic grating sensor of contact stress at Interface of Rolling；
Fig. 2 is a kind of B partial schematic diagrams for measuring the fiber-optic grating sensor of contact stress at Interface of Rolling；
Fig. 3 is a kind of A-A diagrammatic cross-sections for measuring the fiber-optic grating sensor of contact stress at Interface of Rolling；
Fig. 4 is that a kind of fiber grating strain figured cloth for measuring the fiber-optic grating sensor of contact stress at Interface of Rolling is put and shown
It is intended to；
Fig. 5 is a kind of test block diagram for measuring the fiber-optic grating sensor of contact stress at Interface of Rolling；
Fig. 6 is a kind of back analysis flow chart for measuring the fiber-optic grating sensor of contact stress at Interface of Rolling；
In figure：1- fiber grating strains flower, 2- rolls, 3- chocks, 4- screws, 5- optical cables, 6- optical fiber collimators A, 7- are accurate
Straight device fixes sleeve, the three-dimensional micro-displacement regulating platform of 8- optical fiber collimators B, 9-.
Embodiment
Below in conjunction with the embodiment of the present invention and accompanying drawing, the technical scheme in the embodiment of the present invention is carried out clear, complete
Ground is described, it is clear that described embodiment is only a part of embodiment of the invention, rather than whole embodiments.Based on this
Embodiment in invention, the every other reality that those of ordinary skill in the art are obtained under the premise of creative work is not made
Example is applied, the scope of protection of the invention is belonged to.
Refer in Fig. 1-Fig. 4, the embodiment of the present invention, a kind of optical fiber grating sensing for measuring contact stress at Interface of Rolling
Device, including fiber grating strain spend 1, roll 2, chock 3, screw 4, optical cable 5, optical fiber collimator A6, collimater fixes sleeve 7,
Optical fiber collimator B8, three-dimensional micro-displacement regulating platform 9.Roller surface rolling overlying regions are provided with a stepped bore, vertical axis side
Put down to by the facing cut of hole one, while milling out 3 slits, spend 1 to be pasted onto at the slit fiber grating strain, apart from the surface of roll 2
3mm, the patch of chock 3 is inserted in the stepped bore, is connected with two screws 4, is spent and left at 1 and optical cable 5 in fiber grating strain
Resin protection fiber grating strain is filled with space, space and spends 1.It is provided with inside stepped bore elongated at one to the axis of roll 2
Hole and two screwed holes, open a hole and the elongated hole insertion at the fore side axis of roll 2, are so easy to optical cable 5 from optical fiber light
Grid strain rosette 1 is drawn, and is come out by roll mandrel string holes, connects optical fiber collimator A6, and optical fiber collimator A6 is fixed by collimater
Sleeve 7 is fixed at the axis aperture of roll 2, and optical fiber collimator B8 is arranged on three-dimensional micro-displacement regulating platform 9, so as to adjust optical fiber
Collimater B8 ensures optical fiber collimator A6 and optical fiber collimator B8 alignments, and optical fiber collimator A6 and optical fiber collimator B8 are used for ensureing
Optical signal is not interrupted because of rotation, and optical fiber collimator B8 is then connected to optical fiber raster wavelength demodulator, optic fiber grating wavelength demodulation
Device connects computer.So in rolling, computer can be obtained by stress value of the inner radial at the surface 3mm of roll 2,
The value of the direct stress and shear stress at Interface of Rolling can be obtained in real time by the Inversion Calculation program finished in advance.
It is 45 ° of right angle strain rosette that the fiber grating strain, which spends 1, according to FBG wavelength-division multiplex principles, makes full use of it real
The advantage of existing quasi-distributed measurement, using realizing that it is straight that 3 different FBG of the wavelength of quasi- distribution are made on a single-mode fiber
45 ° of angle strain rosette, reaches the number for saving demodulator passage.Fiber grating strain spends 1 to be pasted onto at the surface 3mm of roll 2.
The surface rolling overlying regions of roll 2 are provided with a stepped bore, and the facing cut of hole one is put down in vertical axis direction, simultaneously
3 slits are milled out, is easy to fiber grating strain to spend 1 to be arranged at the slit, the hole is arranged to stairstepping, is easy to chock 3
The stepped bore can be covered, to protect fiber grating strain to spend 1.
The chock 3 ensures partly to be completely covered on stepped bore surface, and code insurance card fiber grating strain in bottom spends 1 and light
Cable 5 can be interference-free, so as to reach the tightly packed stepped bore of energy.Chock 3 is connected with roll 2 by two screws 4, chock
After 3 finish with the cooperation of roll 2, the surface grinding is smooth.
Fiber grating strain inside stepped bore, which is spent, leaves remaining space between 1 and optical cable 5, for filling out resin,
Resin is covered in fiber grating strain and spent on 1, spends 1 to play a protective role fiber grating strain.
Referring to Fig. 5, the present invention is in use, the optical signal that optical fiber raster wavelength demodulator is sent passes through optical fiber collimator B8
Optical fiber collimator A6 is sent to, then is sent to fiber grating strain and spends 1, fiber grating strain spends 1 light for being reflected back specific wavelength
Signal is resent to optical fiber raster wavelength demodulator, optic fiber grating wavelength again by optical fiber collimator A6 to optical fiber collimator B8
Demodulator is connected with computer.So in rolling, computer can be obtained by inner radial at the surface 3mm of roll 2
Stress value, can obtain the value of the direct stress and shear stress at Interface of Rolling in real time by the Inversion Calculation program finished in advance.
Referring to Fig. 6, inversion algorithm theory of program：The radius of the circle of measured value is Rc, the radius of roll in itself is Rd,
In following formula, subscript c means relevant with the circle of measured value, and subscript d means relevant with roll section circle.It is false in isothermal
Set isotropic material elastic equation can by Muskhelishvili (2008) (Muskhelishvili, N.,
1953.Singular Integral Equations:Boundary Problems of Function Theoryand
TheirApplication to Mathematical Physics, 1st ed.Dover, NewYork, pp.316-322) give
Go out：
Wherein z=x+iy=reiθ (2)
Here σrrFor radial stress, σθθFor circumference stress, σrθFor shear stress, complex potential φ (z) and ψ (z) can expand to one
Power series, so：
The present invention be a kind of method of indirect measurement Interface of Rolling contact stress, by measure roll inner elastomeric strain from
And inverting backstepping obtains the direct stress and shear stress at Interface of Rolling, it is not necessary to direct contact plate band, and the optical fiber inside insertion
Grating strain floriation will not change as-rolled condition, impression be left in strip and will not be to rubbing at Interface of Rolling so as to avoid
Wipe and lubrication produces disturbance.The present invention can realize the direct stress and shear stress at measurement Interface of Rolling in real time, can be preliminary in work
The measurement to contact stress at Interface of Rolling is realized on industry milling train.
It is obvious to a person skilled in the art that the invention is not restricted to the details of above-mentioned one exemplary embodiment, Er Qie
In the case of without departing substantially from spirit or essential attributes of the invention, the present invention can be realized in other specific forms.Therefore, no matter
From the point of view of which point, embodiment all should be regarded as exemplary, and be nonrestrictive, the scope of the present invention is by appended power
Profit is required rather than described above is limited, it is intended that all in the implication and scope of the equivalency of claim by falling
Change is included in the present invention.
Moreover, it will be appreciated that although the present specification is described in terms of embodiments, not each embodiment is only wrapped
Containing an independent technical scheme, this narrating mode of specification is only that for clarity, those skilled in the art should
Using specification as an entirety, the technical solutions in the various embodiments may also be suitably combined, forms those skilled in the art
It may be appreciated other embodiment.
Claims (7)
1. a kind of fiber-optic grating sensor for measuring contact stress at Interface of Rolling, it is characterised in that including fiber grating strain
Flower, roll, chock, optical cable, optical fiber collimator A, collimater fixes sleeve, optical fiber collimator B and three-dimensional micro-displacement regulating platform；Institute
The rolling overlying regions for stating roller surface are provided with a stepped bore；The vertical roller axis direction one side of the stepped bore is by milling
It is flat, while being milled with slit；The fiber grating strain flower is pasted onto at slit；The chock is located at the upper part of stepped bore；
One is provided with inside the stepped bore to the elongated hole at roll axis, is provided with the roll operation side axle line one thin with this
The hole of elongated hole insertion；One end of the optical cable is connected with fiber grating strain flower, the other end and the optical fiber collimator A of the optical cable
Connection；The optical fiber collimator A is fixed on by collimater fixes sleeve at the aperture of roll operation side axle line；The optical fiber is accurate
Straight device B is arranged on three-dimensional micro-displacement regulating platform, ensures that optical fiber collimator A6 and optical fiber are accurate by three-dimensional micro-displacement regulating platform
Straight device B8 alignments；The optical fiber collimator B is then connected to optical fiber raster wavelength demodulator；The optical fiber raster wavelength demodulator connects
Connect computer.
2. the fiber-optic grating sensor of contact stress at measurement Interface of Rolling according to claim 1, it is characterised in that institute
It is 45 ° of right angle strain rosette to state fiber grating strain flower, realizes that 3 FBG of quasi- distribution are made on an optical fiber.
3. the fiber-optic grating sensor of contact stress at measurement Interface of Rolling according to claim 1, it is characterised in that institute
Fiber grating strain flower is stated to be pasted onto at roller surface 3mm.
4. the fiber-optic grating sensor of contact stress at measurement Interface of Rolling according to claim 1, it is characterised in that institute
State and leave space between fiber grating strain flower and optical cable, the gap is filled with resin.
5. the fiber-optic grating sensor of contact stress at measurement Interface of Rolling according to claim 1, it is characterised in that institute
Chock is stated to be connected with roll by screw.
6. the fiber-optic grating sensor of contact stress at measurement Interface of Rolling according to claim 1, it is characterised in that institute
State after chock and roll coordinate and finish, chock surface is ground smooth.
7. the fiber-optic grating sensor of contact stress at measurement Interface of Rolling according to claim 1, it is characterised in that its
Method of testing is：The optical signal that the optical fiber raster wavelength demodulator is sent is sent to optical fiber collimator by optical fiber collimator B
A, then fiber grating strain flower is sent to, the optical signal that the fiber grating strain flower is reflected back specific wavelength is accurate by optical fiber again
Straight device A is resent to optical fiber raster wavelength demodulator, the optical fiber raster wavelength demodulator and computer to optical fiber collimator B
It is connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510193289.8A CN104819791B (en) | 2015-04-22 | 2015-04-22 | A kind of fiber-optic grating sensor for measuring contact stress at Interface of Rolling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510193289.8A CN104819791B (en) | 2015-04-22 | 2015-04-22 | A kind of fiber-optic grating sensor for measuring contact stress at Interface of Rolling |
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| Publication Number | Publication Date |
|---|---|
| CN104819791A CN104819791A (en) | 2015-08-05 |
| CN104819791B true CN104819791B (en) | 2017-10-31 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510193289.8A Expired - Fee Related CN104819791B (en) | 2015-04-22 | 2015-04-22 | A kind of fiber-optic grating sensor for measuring contact stress at Interface of Rolling |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113884228B (en) * | 2021-09-29 | 2024-03-26 | 燕山大学 | Metallized fiber bragg grating stress sensor suitable for cold-rolled sheet shape detection |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6278810B1 (en) * | 1998-09-10 | 2001-08-21 | University Of Maryland | Measurement of distributed strain and temperature based on higher order and higher mode Bragg conditions |
| CN102175367A (en) * | 2011-03-10 | 2011-09-07 | 大连理工大学 | Full-scale optical fiber monitoring technology for multilayer medium of road structure |
| CN202748010U (en) * | 2012-06-28 | 2013-02-20 | 长安大学 | Pavement structure stress and strain gauge based on fiber bragg grating |
| CN104138912A (en) * | 2013-05-11 | 2014-11-12 | 江鹤 | Measuring device for rolling mill |
| CN204575229U (en) * | 2015-04-22 | 2015-08-19 | 武汉科技大学 | A kind of fiber-optic grating sensor measuring Interface of Rolling place contact stress |
-
2015
- 2015-04-22 CN CN201510193289.8A patent/CN104819791B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6278810B1 (en) * | 1998-09-10 | 2001-08-21 | University Of Maryland | Measurement of distributed strain and temperature based on higher order and higher mode Bragg conditions |
| CN102175367A (en) * | 2011-03-10 | 2011-09-07 | 大连理工大学 | Full-scale optical fiber monitoring technology for multilayer medium of road structure |
| CN202748010U (en) * | 2012-06-28 | 2013-02-20 | 长安大学 | Pavement structure stress and strain gauge based on fiber bragg grating |
| CN104138912A (en) * | 2013-05-11 | 2014-11-12 | 江鹤 | Measuring device for rolling mill |
| CN204575229U (en) * | 2015-04-22 | 2015-08-19 | 武汉科技大学 | A kind of fiber-optic grating sensor measuring Interface of Rolling place contact stress |
Non-Patent Citations (2)
| Title |
|---|
| 光纤光栅传感器用于应变监测时定向技术的研究;陈雪峰;《中国优秀硕士学位论文全文数据库（电子期刊） 信息科技辑》;20090228(第2期);第40-65页 * |
| 轧辊接触应力的混合解法;瞿志豪等;《金属学报》;19920531;第28卷(第5期);第191-198页 * |
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