CN110455447A - The curved bolt stress long term monitoring device in section of jurisdiction and installation method based on fiber grating - Google Patents
The curved bolt stress long term monitoring device in section of jurisdiction and installation method based on fiber grating Download PDFInfo
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- CN110455447A CN110455447A CN201910732203.2A CN201910732203A CN110455447A CN 110455447 A CN110455447 A CN 110455447A CN 201910732203 A CN201910732203 A CN 201910732203A CN 110455447 A CN110455447 A CN 110455447A
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- 239000000835 fiber Substances 0.000 title claims abstract description 114
- 230000007774 longterm Effects 0.000 title claims abstract description 22
- 238000000034 method Methods 0.000 title claims abstract description 20
- 238000012806 monitoring device Methods 0.000 title claims abstract description 16
- 238000009434 installation Methods 0.000 title claims abstract description 9
- 239000013307 optical fiber Substances 0.000 claims description 29
- 239000003292 glue Substances 0.000 claims description 9
- 239000003822 epoxy resin Substances 0.000 claims description 8
- 229920000647 polyepoxide Polymers 0.000 claims description 8
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims description 6
- 239000004745 nonwoven fabric Substances 0.000 claims description 4
- 229920000742 Cotton Polymers 0.000 claims description 3
- 238000004140 cleaning Methods 0.000 claims description 3
- 238000012937 correction Methods 0.000 claims description 3
- 230000001419 dependent effect Effects 0.000 claims description 3
- 235000008331 Pinus X rigitaeda Nutrition 0.000 claims description 2
- 235000011613 Pinus brutia Nutrition 0.000 claims description 2
- 241000018646 Pinus brutia Species 0.000 claims description 2
- 238000012544 monitoring process Methods 0.000 abstract description 9
- 238000010276 construction Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 230000006378 damage Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005498 polishing Methods 0.000 description 2
- 239000011150 reinforced concrete Substances 0.000 description 2
- 239000002759 woven fabric Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005538 encapsulation Methods 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
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- 239000011347 resin Substances 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L1/00—Measuring force or stress, in general
- G01L1/24—Measuring force or stress, in general by measuring variations of optical properties of material when it is stressed, e.g. by photoelastic stress analysis using infrared, visible light, ultraviolet
- G01L1/242—Measuring force or stress, in general by measuring variations of optical properties of material when it is stressed, e.g. by photoelastic stress analysis using infrared, visible light, ultraviolet the material being an optical fibre
- G01L1/246—Measuring force or stress, in general by measuring variations of optical properties of material when it is stressed, e.g. by photoelastic stress analysis using infrared, visible light, ultraviolet the material being an optical fibre using integrated gratings, e.g. Bragg gratings
Abstract
The present invention relates to a kind of curved bolt stress long term monitoring device in section of jurisdiction based on fiber grating and installation methods.The object of the present invention is to provide a kind of curved bolt stress long term monitoring device in section of jurisdiction based on fiber grating and installation methods, with long-term, stable, the accurate and effective curved bolt stress monitoring information of acquisition.The technical scheme is that the monitoring device offers the internal channel along the curved elongated arrangement of bolt axis direction on the intrados of curved bolt, the outer channel along the curved elongated arrangement of bolt axis direction is offered on the extrados of curved bolt；A fiber grating string is laid in the internal channel and outer channel jointly, the fiber grating string is laid along outer channel to outer channel left end from the right end of outer channel, and lay from the left end of internal channel along internal channel to internal channel right end, fiber grating string one end connects fiber Bragg grating (FBG) demodulator.The present invention is suitable for the long-term operation monitoring of city underground shield tunnel and other curved bolt stresses of underwater shield tunnel.
Description
Technical field
The present invention relates to a kind of curved bolt stress long term monitoring device in section of jurisdiction based on fiber grating and installation methods.It is applicable in
It is monitored in the long-term operation of city underground shield tunnel and other curved bolt stresses of underwater shield tunnel.
Background technique
Urban track traffic subway sectional tunnel mostly uses greatly shield construction, and there are also some cities across tunnel knot under river
Structure also uses shield tunnel scheme.Shield tunnel liner mostly uses assembled steel reinforced concrete pipe sheet, it and integral tunnel lining
Maximum difference is there are segment joint in a large amount of rings and interannular seam, and duct piece connector is the weakness in shield tunnel domain structure
Link.
It is connected by screw bolts between duct pieces of shield tunnel, generally there is several structure types such as straight bolt, curved bolt, oblique bolt,
Curved bolt is wherein mostly used greatly.The destruction of shield tunnel construction starts from seam crossing, and the tectonic type and bearing capacity of seam are whole
It is occupied an important position in ring structure carrying.
Design for connector generally approximatively regards connector face as continuous reinforced concrete section, bolt is seen
Make tension reinforcement.Due to seam stress and the complexity of surface construction is contacted, through the method frequently with test is design in engineering
It calculates and connector improves and provides foundation.
Currently, bolt strain measurement is and symmetrical by every connection bolt two sides grooving when shield duct piece connector test
Foil gauge is laid, seam bolt strain value is tested using static strain electrical measuring method, the method that connection bolt internal force is calculated with this.It should
Method carries out short-term bolt stress test job, simple and effective, but the shield tunnel for runing for a long time, if necessary to carry out spiral shell
The monitoring of bolt stress long term variations, instrument durability and stability aspect obviously do not reach requirement.
After soft clay area Shield-bored tunnels put into effect, due to the continuous action by train circulation dynamic load, meanwhile,
It is influenced and the influence of economical activities of mankind by engineering geological condition around subway line again, tunnel is caused to construct and runing the phase
Biggish sedimentation can be generated.The Longitudinal Settlement and its inhomogeneities of shield tunnel, it will cause the additional internal force of tunnel structure, become
Shape, butt joint waterproof and safety of structure constitute a threat to.
Summary of the invention
The technical problem to be solved by the present invention is in view of the above problems, providing a kind of pipe based on fiber grating
The curved bolt stress long term monitoring device of piece and installation method, with long-term, stable, the accurate and effective curved bolt stress monitoring of acquisition
Information.
The technical scheme adopted by the invention is that: a kind of curved bolt stress long term monitoring dress in section of jurisdiction based on fiber grating
It sets, it is characterised in that:
The internal channel along the curved elongated arrangement of bolt axis direction, the outer arc of curved bolt are offered on the intrados of curved bolt
The outer channel along the curved elongated arrangement of bolt axis direction is offered on face；
A fiber grating string is laid in the internal channel and outer channel jointly, the fiber grating string is from the right side of outer channel
End is laid along outer channel to outer channel left end, and is laid from the left end of internal channel along internal channel to internal channel right end, the optical fiber
Grating string one end connects fiber Bragg grating (FBG) demodulator；
On the fiber grating string with the midpoint corresponding position of the internal channel be inner fiber grating bare gate, fiber grating string
The upper midpoint corresponding position with the outer channel is infrared optical fiber grating bare gate；There is a bare gate among inside and outside fiber grating bare gate
Point strains measuring point for bolt；
On the fiber grating string, infrared optical fiber grating bare gate is nearby carved with a grid point, is temperature-compensating measuring point；
Epoxy resin is filled in the internal channel and outer channel.
The fiber grating string from the fiber Bragg grating (FBG) demodulator connecting pin to the other end be sequentially connected armouring pine set
Optical fiber, outer loose tube fiber I, infrared optical fiber grating bare gate, outer loose tube fiber II, armouring loose tube fiber, interior loose tube fiber I, inner fiber
Grating bare gate, interior loose tube fiber II, armouring loose tube fiber to tail optical fiber；
Its China and foreign countries' loose tube fiber I, infrared optical fiber grating bare gate and outer loose tube fiber II are placed in the outer channel, corresponding curved spiral shell
The arc segment of bolt is arranged；The interior loose tube fiber I, inner fiber grating bare gate, interior loose tube fiber II are placed in the internal channel, right
The arc segment of curved bolt is answered to arrange.
The inside and outside fiber grating bare gate grid region length is 10cm.
The temperature-compensating measuring point is apart from the infrared optical fiber grating bare gate about 20cm.
The groove dimensions that the internal channel and outer channel correspond to the curved bolt arc segment are width 3mm, depth 4mm；In described
Groove and outer channel correspond to curved bolt both ends threaded area straightway groove dimensions be width 4mm, depth 4mm, trench depth with
Bottom of Thread is started.
Curved bolt is strained due to caused by temperature change, in addition strain summation calculating caused by loads change is as follows:
εAlways=K (λ1-λ0)+B(λt1-λt0)；
Curved bolt is only because strain calculation caused by loads change is as follows:
εAlways=K (λ1-λ0)+B(λt1-λt0)-α×ΔT；
Δ T=100 × (λt1-λt0), unit takes DEG C；
In formula: εAlwaysDependent variable, unit μ ε；
ε-dependent variable, unit μ ε；
K- strains grating strain coefficient, unit μ ε/nm；
λ1Strain the current wavelength value (nm) of grating；
λ0Strain the initial wavelength value (nm) of grating；
λt1The current wavelength value of temperature compensation grating (nm)；
λt0The initial wavelength value of temperature compensation grating (nm)；
The curved bolt thermal expansion coefficient of α-, unit take (μ ε/DEG C).
A kind of installation method of the monitoring device, it is characterised in that:
1) it customizes fiber grating string: customizing fiber grating string to producer according to curved bolt model, size, fiber grating is provided
2 bolts of going here and there strain grid dot center wavelength, the coefficient of strain and the temperature correction coefficient of measuring point and 1 temperature-compensating measuring point；
2) it slots: opening up internal channel and outer channel on curved bolt with slotting drill bit, groove bottom and side are required to be smooth flat
It is whole；
3) polish and clean: the bottom surface and side of internal groove and outer channel are polished with fine sandpaper, after the completion of polishing
Acetone soln is dipped with non-woven fabrics to be cleaned, and is wiped after cleaning with clean absorbent cotton, the nothing after guaranteeing wiping
Otherwise woven fabric cleans again without spot；The fiber grating string of quasi- fixation is cleaned, the same groove bottom of clean method；
4) fixed: the fiber grating string for having carved grid is applied in the internal channel and outer channel held successfully, is adjusted fiber position, is made
It obtains inside and outside fiber grating bare gate and is located at the midpoint in inside and outside groove；After adjustment good position in the inside and outside groove of curved bolt
Midpoint drip upper a little 502 glue and be fixed temporarily midpoint, be straightened respectively after glue parches two optical fibers it is fixed in
Between bare gate；
5) it pastes: the fiber grating string fixed is pasted, first internally, infrared optical fiber grating bare gate position glued
Patch is pasted and is coated uniformly on above bare wire using 502 glue, is carried out smearing using tiny hairbrush and is guaranteed that optical fiber is tightly attached to slot bottom
Face；Then arc segment and threaded area straightway are successively pasted, method of attaching is the same as fiber grating bare gate；
6) it encapsulates: being coated uniformly in inside and outside groove with epoxy resin, guarantee that epoxy resin uniformly densely fills full institute
In the inside and outside groove opened.
The physical quantity that fiber-optic grating sensor can detecte include strain, stress, temperature, displacement, voltage, pressure, electric current,
Magnetic field, frequency etc..Its good reliability, strong antijamming capability, are quick on the draw, waterproof and anticorrosion, and wavelength is not by factors such as fibre-optical bendings
The influence of caused system loss is not also influenced by light source power fluctuation, it is a kind of absolute parameter, is had very high reliable
Property and extraordinary stability.It is particularly suitable for the so-called intellectual material of embedding material Inner Constitution or structure, to intellectual material
Or the states such as safety, degree of injury, load fatigue of structure carry out continuous real-time monitoring, can be very good to solve the curved spiral shell in section of jurisdiction
Bolt stress long term monitoring problem.
The beneficial effects of the present invention are: the present invention is affixed directly to curved spiral shell by using un-encapsulated fiber grating bare gate
Stud structure outer surface carries out the long term monitoring of the curved bolt stress of shield duct piece, so that city underground shield tunnel and other can be realized
The curved bolt stress long term monitoring of underwater shield tunnel.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of embodiment.
Fig. 2 is the structural schematic diagram of curved bolt in embodiment.
Fig. 3 is the schematic cross-section of curved bolt in embodiment.
Fig. 4 is the structural schematic diagram of fiber grating string in embodiment.
Specific embodiment
As shown in Figure 1, the present embodiment is a kind of curved bolt stress long term monitoring device in section of jurisdiction based on fiber grating, wherein
Curved bolt 1 divides to be located in the middle arc segment 101 and positioned at the threaded area straightway 102 (see Fig. 2) at both ends, in curved bolt 1
The internal channel 104 along the elongated arrangement of curved 1 axis direction of bolt is offered on intrados, offers edge on the extrados of curved bolt 1
The outer channel 103 (see Fig. 3) of the elongated arrangement of curved 1 axis direction of bolt, internal channel 104 are parallel to each other with outer channel 103.
In this example the groove dimensions of the arc segment 101 of the corresponding curved bolt of internal channel 104 and outer channel 103 be width 3mm,
Deep 4mm；The groove dimensions of internal channel 104 and the corresponding curved 1 both ends threaded area straightway 102 of bolt of outer channel 103 are width
4mm, depth 4mm, trench depth are started with Bottom of Thread.
It is laid with a fiber grating string 2, fiber grating in the present embodiment jointly in internal channel 104 and outer channel 103
String 2 is laid along outer channel 103 to 103 left end of outer channel from the right end of outer channel 103, and from the left end of internal channel 104 along septal fossula
The laying of slot 104 to 104 right end of internal channel, 2 one end of fiber grating string connects fiber Bragg grating (FBG) demodulator 3.
As shown in figure 4, fiber grating string 2 from 3 connecting pin of fiber Bragg grating (FBG) demodulator to the other end be sequentially connected armouring
Loose tube fiber 201, outer loose tube fiber I 202, infrared optical fiber grating bare gate 203, outer loose tube fiber II 204, armouring loose tube fiber 201,
Interior loose tube fiber I 205, inner fiber grating bare gate 206, interior loose tube fiber II 207, armouring loose tube fiber 201 arrive tail optical fiber.
In the present embodiment armouring loose tube fiber 201 curved 1 end of bolt remove straightway after exposed parts length need to be greater than etc.
In 1m.
This example China and foreign countries loose tube fiber I 202, infrared optical fiber grating bare gate 203 and outer loose tube fiber II 204 are placed in outer channel 103
Interior, the arc segment 101 of corresponding curved bolt 1 is arranged.Interior loose tube fiber I 205, inner fiber grating bare gate 206, interior loose tube fiber II
207 are placed in internal channel 104, and the arc segment 101 of corresponding curved bolt 1 is arranged.
The present embodiment China and foreign countries fiber grating bare gate 203 is corresponding with the midpoint of outer channel 103, inner fiber grating bare gate
206 is corresponding with the midpoint of internal channel 104.Inside and outside fiber grating bare gate grid region length is 10.0cm, inside and outside light in this example
There is 1 bare gate point at 5.0cm among fine grating bare gate, strains measuring point 209 for bolt.
2 upper outer surface of fiber grating string is carved with a grid point apart from 203 about 20cm of infrared optical fiber grating bare gate, is temperature-compensating
Measuring point 208.
The present embodiment fills epoxy resin in internal channel 104 and outer channel 103, to realize encapsulation.
Strain calculation formula is as follows in this example:
Curved bolt 1 is strained due to caused by temperature change, in addition strain summation calculating caused by loads change is as follows:
εAlways=K (λ1-λ0)+B(λt1-λt0)
Curved bolt 1 is only because strain calculation caused by loads change is as follows:
εAlways=K (λ1-λ0)+B(λt1-λt0)-α×ΔT
Δ T=100 × (λt1-λt0), unit takes DEG C
In formula: εAlwaysDependent variable, unit μ ε；
ε-dependent variable, unit μ ε；
K- strains grating strain coefficient, unit μ ε/nm；
λ1Strain the current wavelength value (nm) of grating；
λ0Strain the initial wavelength value (nm) of grating；
λt1The current wavelength value of temperature compensation grating (nm)；
λt0The initial wavelength value of temperature compensation grating (nm)；
Curved 1 thermal expansion coefficient of bolt of α-, unit take (μ ε/DEG C).
The installation method of the present embodiment is as follows:
1) it customizes fiber grating string 2: customizing fiber grating string 2 to producer according to curved 1 model of bolt, size, light need to be provided
Grid dot center wavelength, the coefficient of strain and the temperature of 2 bolt strain measuring point 209 and 1 temperature-compensating measuring points 208 on fine grating string 2
Spend the relevant parameters such as correction factor.
2) it slots: with slotting drill bit in 102 groove groove dimensions 4mm (width) * 4 (depth) of both ends threaded area straightway
Mm, trench depth are started with Bottom of Thread, intermediate arc segment 101 groove groove dimensions 3mm (width) * 4 (depth) mm, groove bottom
And side be required to be smooth it is smooth.
3) polish and clean: the bottom surface and side for the slot held successfully to curved bolt 1 are polished with fine sandpaper, after the completion of polishing
Acetone soln is dipped with non-woven fabrics to be cleaned, and is wiped after cleaning with clean absorbent cotton, the nothing after guaranteeing wiping
Otherwise woven fabric cleans again without spot.Then the fiber grating string 2 of quasi- fixation is cleaned, the same slot bottom of clean method
Face.
4) fixed: the fiber grating string 2 for having carved grid is applied in the slot held successfully, fiber position is adjusted, so that inside and outside optical fiber
Grating bare gate is located at the midpoint in the inside and outside groove of curved bolt 1.Adjust good position after in the inside and outside groove of curved bolt 1 in
Point position drips upper a little 502 glue and is fixed temporarily midpoint, and it is fixed intermediate naked that two optical fibers are straightened respectively after glue parches
Grid.
5) paste: the fiber grating string 2 fixed is pasted, first internally, infrared optical fiber grating bare gate position carry out
It pastes, pastes and be coated uniformly on above bare wire using 502 glue, smearing is carried out using tiny hairbrush and guarantees that optical fiber is tightly attached to slot bottom
Face.Then arc segment 101 and straightway are successively pasted, method of attaching is the same as inside and outside fiber grating bare gate.
6) it encapsulates: the bolt pasted being packaged, is coated uniformly in inside and outside groove with epoxy resin, guarantee ring
Oxygen resin is uniformly densely filled in the slot of Man Suokai.
7) protect: packaged bolt will be protected in end outgoing line position, so that 2 lead of fiber grating string is not broken
It is bad.
Claims (7)
1. a kind of curved bolt stress long term monitoring device in section of jurisdiction based on fiber grating, it is characterised in that:
The internal channel (104) along the elongated arrangement of curved bolt (1) axis direction, curved spiral shell are offered on the intrados of curved bolt (1)
The outer channel (103) along the elongated arrangement of curved bolt (1) axis direction is offered on the extrados of bolt (1)；
Be laid with a fiber grating string (2) in the internal channel (104) and outer channel (103) jointly, the fiber grating string from
The right end of outer channel (103) is laid along outer channel (103) to outer channel (103) left end, and from the left end of internal channel (104) along interior
Groove (104) laying to internal channel (104) right end, described fiber grating string (2) one end connects fiber Bragg grating (FBG) demodulator (3)；
On the fiber grating string (2) with the midpoint corresponding position of the internal channel (104) be inner fiber grating bare gate (206),
On fiber grating string (2) with the midpoint corresponding position of the outer channel (103) be infrared optical fiber grating bare gate (203)；Inside and outside optical fiber
There is a bare gate point among grating bare gate, strains measuring point (209) for bolt；
On the fiber grating string (2), infrared optical fiber grating bare gate (203) is nearby carved with a grid point, is temperature-compensating measuring point
(208)；
Epoxy resin is filled in the internal channel (104) and outer channel (103).
2. the curved bolt stress long term monitoring device in the section of jurisdiction according to claim 1 based on fiber grating, it is characterised in that:
The fiber grating string (2) covers light from the fiber Bragg grating (FBG) demodulator (3) connecting pin to the other end to be sequentially connected armouring pine
Fine (201), outer loose tube fiber I (202), infrared optical fiber grating bare gate (203), outer loose tube fiber II (204), armouring loose tube fiber
(201), interior loose tube fiber I (205), inner fiber grating bare gate (206), interior loose tube fiber II (207), armouring loose tube fiber
(201) tail optical fiber is arrived；
Its China and foreign countries' loose tube fiber I (202), infrared optical fiber grating bare gate (203) and outer loose tube fiber II (204) are placed in the outer channel
(103) in, arc segment (101) arrangement of corresponding curved bolt (1)；The interior loose tube fiber I (205), inner fiber grating bare gate
(206), interior loose tube fiber II (207) is placed in the internal channel (104), arc segment (101) arrangement of corresponding curved bolt (1).
3. the curved bolt stress long term monitoring device in the section of jurisdiction according to claim 1 or 2 based on fiber grating, feature exist
In: the inside and outside fiber grating bare gate grid region length is 10cm.
4. the curved bolt stress long term monitoring device in the section of jurisdiction according to claim 1 or 2 based on fiber grating, feature exist
In: the temperature-compensating measuring point (208) is apart from infrared optical fiber grating bare gate (203) the about 20cm.
5. the curved bolt stress long term monitoring device in the section of jurisdiction according to claim 1 or 2 based on fiber grating, feature exist
In the groove dimensions of: the internal channel (104) and corresponding curved bolt (1) arc segment (101) of outer channel (103) be width 3mm,
Deep 4mm；The quarter of the internal channel (104) and corresponding curved bolt (1) the both ends threaded area straightway (102) of outer channel (103)
Slot is started having a size of wide 4mm, depth 4mm, trench depth with Bottom of Thread.
6. the curved bolt stress long term monitoring device in the section of jurisdiction according to claim 1 based on fiber grating, it is characterised in that:
Curved bolt (1) is strained due to caused by temperature change, in addition strain summation calculating caused by loads change is as follows:
εAlways=K (λ1-λ0)+B(λt1-λt0)；
Curved bolt (1) is only because strain calculation caused by loads change is as follows:
εAlways=K (λ1-λ0)+B(λt1-λt0)-α×ΔT；
Δ T=100 × (λt1-λt0), unit takes DEG C；
In formula: εAlwaysDependent variable, unit μ ε；
ε-dependent variable, unit μ ε；
K- strains grating strain coefficient, unit μ ε/nm；
λ1Strain the current wavelength value (nm) of grating；
λ0Strain the initial wavelength value (nm) of grating；
λt1The current wavelength value of temperature compensation grating (nm)；
λt0The initial wavelength value of temperature compensation grating (nm)；
The curved bolt of α-(1) thermal expansion coefficient, unit take (μ ε/DEG C).
7. a kind of installation method of claim 1~6 monitoring device, it is characterised in that:
1) fiber grating string (2) are customized: customizes fiber grating string (2) to producer according to curved bolt (1) model, size, light is provided
The grid dot center wavelength of fine upper 2 bolts strain measuring point (209) of grating string (2) and 1 temperature-compensating measuring point (208), strain system
Several and temperature correction coefficient；
2) it slots: opening up internal channel (104) and outer channel (103) on curved bolt (1) with slotting drill bit, groove bottom and side are wanted
Ask smooth；
3) polish and clean: the bottom surface and side of internal groove (104) and outer channel (103) are polished with fine sandpaper, are polished
Acetone soln is dipped with non-woven fabrics after the completion to be cleaned, is wiped after cleaning with clean absorbent cotton, guarantees wiping
Otherwise non-woven fabrics afterwards cleans again without spot；The fiber grating string (2) of quasi- fixation is cleaned, clean method is same
Groove bottom；
4) fixed: the fiber grating string (2) for having carved grid is applied in the internal channel (104) and outer channel (103) held successfully, adjusts light
Fine position, so that inside and outside fiber grating bare gate is located at the midpoint in inside and outside groove；In curved bolt (1) after adjustment good position
Midpoint in inside and outside groove drips upper a little 502 glue and is fixed temporarily midpoint, and two sides are straightened respectively after glue parches
The fixed intermediate bare gate of optical fiber；
5) it pastes: the fiber grating string (2) fixed is pasted, first internally, infrared optical fiber grating bare gate position glued
Patch is pasted and is coated uniformly on above bare wire using 502 glue, is carried out smearing using tiny hairbrush and is guaranteed that optical fiber is tightly attached to slot bottom
Face；Then arc segment (101) and threaded area straightway (102) are successively pasted, method of attaching is the same as fiber grating bare gate；
6) it encapsulates: being coated uniformly in inside and outside groove with epoxy resin, guarantee that epoxy resin uniformly densely fills Man Suokai's
In inside and outside groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910732203.2A CN110455447A (en) | 2019-08-09 | 2019-08-09 | The curved bolt stress long term monitoring device in section of jurisdiction and installation method based on fiber grating |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910732203.2A CN110455447A (en) | 2019-08-09 | 2019-08-09 | The curved bolt stress long term monitoring device in section of jurisdiction and installation method based on fiber grating |
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| Publication Number | Publication Date |
|---|---|
| CN110455447A true CN110455447A (en) | 2019-11-15 |
Family
ID=68485554
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|---|---|---|---|
| CN201910732203.2A Pending CN110455447A (en) | 2019-08-09 | 2019-08-09 | The curved bolt stress long term monitoring device in section of jurisdiction and installation method based on fiber grating |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114216594A (en) * | 2021-12-01 | 2022-03-22 | 上海交通大学 | Multidimensional force and moment sensor and manipulator |
| CN114777851A (en) * | 2022-06-22 | 2022-07-22 | 南方电网科学研究院有限责任公司 | Long-term monitoring devices of strain clamp crimping |
Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101397903A (en) * | 2008-11-05 | 2009-04-01 | 大庆油田有限责任公司 | Method for monitoring sleeve circumferential strain by using optical fibre grating sensor |
| CN103267763A (en) * | 2013-04-27 | 2013-08-28 | 广州市特种机电设备检测研究院 | Health monitoring method for metal structure of hoisting machinery |
| CN203259281U (en) * | 2013-04-26 | 2013-10-30 | 中国矿业大学 | Coal mine downhole optical fiber raster multi-measuring point anchor pole stress measuring device |
| CN104089729A (en) * | 2014-07-23 | 2014-10-08 | 上海市建筑科学研究院 | Stress monitoring sensor and method for connecting bolt of fiber bragg grating structure |
| CN104101306A (en) * | 2014-07-24 | 2014-10-15 | 河海大学 | Fiber bragg grating temperature compensation method and ultrathin miniature rebar strainometer |
| CN104482855A (en) * | 2014-11-19 | 2015-04-01 | 河海大学 | Foundation pit slide surface position monitoring method based on FBG (fiber bragg grating) |
| CN204313795U (en) * | 2014-12-09 | 2015-05-06 | 浙江华东工程安全技术有限公司 | Flush type multi-point displacement measurement mechanism |
| CN204495294U (en) * | 2015-04-02 | 2015-07-22 | 江苏欧讯能源科技有限公司 | A kind of high strength wind-power tower bolt monitoring system based on fiber grating |
| CN205654365U (en) * | 2016-05-18 | 2016-10-19 | 长安大学 | Bury fiber grating's tunnel lock foot anchor pipe atress characteristic testing arrangement underground |
| CN107941306A (en) * | 2017-12-21 | 2018-04-20 | 珠海任驰光电科技有限公司 | A kind of liquid level sensor and level measuring method of the encapsulation of modified double optical fiber grating |
| CN109186826A (en) * | 2018-09-10 | 2019-01-11 | 中国民航大学 | A kind of board bottom flexural tensile stress monitoring system and method for existing road face structure |
| CN208688694U (en) * | 2018-08-20 | 2019-04-02 | 刘绍波 | A kind of fiber grating force sensor for anchor rope |
| CN109655007A (en) * | 2018-12-07 | 2019-04-19 | 贵州桥梁建设集团有限责任公司 | A kind of interior pipe inner concrete deformation monitoring method being perfused of grand bridge tubular arch |
| CN211061096U (en) * | 2019-08-09 | 2020-07-21 | 浙江华东工程安全技术有限公司 | Long-term monitoring device for stress of bent bolt of pipe piece based on fiber bragg grating |
-
2019
- 2019-08-09 CN CN201910732203.2A patent/CN110455447A/en active Pending
Patent Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101397903A (en) * | 2008-11-05 | 2009-04-01 | 大庆油田有限责任公司 | Method for monitoring sleeve circumferential strain by using optical fibre grating sensor |
| CN203259281U (en) * | 2013-04-26 | 2013-10-30 | 中国矿业大学 | Coal mine downhole optical fiber raster multi-measuring point anchor pole stress measuring device |
| CN103267763A (en) * | 2013-04-27 | 2013-08-28 | 广州市特种机电设备检测研究院 | Health monitoring method for metal structure of hoisting machinery |
| CN104089729A (en) * | 2014-07-23 | 2014-10-08 | 上海市建筑科学研究院 | Stress monitoring sensor and method for connecting bolt of fiber bragg grating structure |
| CN104101306A (en) * | 2014-07-24 | 2014-10-15 | 河海大学 | Fiber bragg grating temperature compensation method and ultrathin miniature rebar strainometer |
| CN104482855A (en) * | 2014-11-19 | 2015-04-01 | 河海大学 | Foundation pit slide surface position monitoring method based on FBG (fiber bragg grating) |
| CN204313795U (en) * | 2014-12-09 | 2015-05-06 | 浙江华东工程安全技术有限公司 | Flush type multi-point displacement measurement mechanism |
| CN204495294U (en) * | 2015-04-02 | 2015-07-22 | 江苏欧讯能源科技有限公司 | A kind of high strength wind-power tower bolt monitoring system based on fiber grating |
| CN205654365U (en) * | 2016-05-18 | 2016-10-19 | 长安大学 | Bury fiber grating's tunnel lock foot anchor pipe atress characteristic testing arrangement underground |
| CN107941306A (en) * | 2017-12-21 | 2018-04-20 | 珠海任驰光电科技有限公司 | A kind of liquid level sensor and level measuring method of the encapsulation of modified double optical fiber grating |
| CN208688694U (en) * | 2018-08-20 | 2019-04-02 | 刘绍波 | A kind of fiber grating force sensor for anchor rope |
| CN109186826A (en) * | 2018-09-10 | 2019-01-11 | 中国民航大学 | A kind of board bottom flexural tensile stress monitoring system and method for existing road face structure |
| CN109655007A (en) * | 2018-12-07 | 2019-04-19 | 贵州桥梁建设集团有限责任公司 | A kind of interior pipe inner concrete deformation monitoring method being perfused of grand bridge tubular arch |
| CN211061096U (en) * | 2019-08-09 | 2020-07-21 | 浙江华东工程安全技术有限公司 | Long-term monitoring device for stress of bent bolt of pipe piece based on fiber bragg grating |
Non-Patent Citations (1)
| Title |
|---|
| 吴彪: "深圳地铁7m盾构管片及螺栓受力现场测试及分析", 《中国优秀硕士学位论文全文数据库工程科技Ⅱ辑》, 15 October 2015 (2015-10-15), pages 9 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114216594A (en) * | 2021-12-01 | 2022-03-22 | 上海交通大学 | Multidimensional force and moment sensor and manipulator |
| WO2023098395A1 (en) * | 2021-12-01 | 2023-06-08 | 上海交通大学 | Multi-dimensional force and torque sensor and manipulator |
| CN114777851A (en) * | 2022-06-22 | 2022-07-22 | 南方电网科学研究院有限责任公司 | Long-term monitoring devices of strain clamp crimping |
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