CN208588349U - A kind of FBG monitoring device of high-speed rail bridge pier sedimentation - Google Patents
A kind of FBG monitoring device of high-speed rail bridge pier sedimentation Download PDFInfo
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- CN208588349U CN208588349U CN201821436696.2U CN201821436696U CN208588349U CN 208588349 U CN208588349 U CN 208588349U CN 201821436696 U CN201821436696 U CN 201821436696U CN 208588349 U CN208588349 U CN 208588349U
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- bridge pier
- fiber grating
- optical fiber
- reference stake
- cylindrical projection
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- 238000004062 sedimentation Methods 0.000 title claims abstract description 23
- 238000012806 monitoring device Methods 0.000 title claims abstract description 14
- 239000000835 fiber Substances 0.000 claims abstract description 77
- 239000013307 optical fiber Substances 0.000 claims abstract description 57
- 239000000853 adhesive Substances 0.000 claims description 14
- 230000001070 adhesive effect Effects 0.000 claims description 14
- 238000004804 winding Methods 0.000 claims description 14
- 238000003466 welding Methods 0.000 claims description 3
- 238000012544 monitoring process Methods 0.000 abstract description 15
- 238000005259 measurement Methods 0.000 abstract description 4
- 230000005540 biological transmission Effects 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 6
- 238000003384 imaging method Methods 0.000 description 2
- 208000025274 Lightning injury Diseases 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Abstract
The utility model discloses a kind of FBG monitoring devices of high-speed rail bridge pier sedimentation, the device includes the body of a bridge, bridge pier, reference stake and three fiber gratings, after two of them fiber grating is stretched, the optical fiber at both ends is separately fixed in the cylindrical projection on reference stake and bridge pier, for perceiving bridge pier sedimentation bring deformation strain；Another fiber grating is freely suspended in the cylindrical projection on bridge pier, provides temperature-compensating for other two strain measurement gratings；When sedimentation deformation occurs for bridge pier, the fiber grating tension of two pre-stretchings generates variation, and wavelength drifts about.The utility model is using fiber grating as sensing element measurement bridge pier sedimentation and deformation, and not by field electromagnetic interference influence, remote transmission signal that can be up to a hundred kilometers can be realized distributed real-time monitoring.
Description
Technical field
The utility model belongs to Geotechnical Monitoring and technical field of optical fiber sensing, and in particular to a kind of high-speed rail bridge pier
The FBG monitoring device of sedimentation.
Background technique
High-speed railway is swift and violent in China's development, and more and more high-speed rail routes interconnect China various regions.But meanwhile I
State's geological structure is complicated, the high-speed rail route under the conditions of geology severe for loess plateau, Qinghai-Tibet Platean etc., Yi Fasheng bridge pier
Settlement issues, if sedimentation is more than safety margins, high-speed rail operational safety just will receive great threat, and therefore, high-speed rail bridge pier sinks
Drop monitoring is particularly important.
Existing bridge pier settlement monitoring mostly uses the technological means such as GPS, laser imaging, optical interdferometer, they are often deposited
Instrumentation it is complicated, it is inconvenient for use, be unfavorable for carry out real-time monitoring the problems such as.As application No. is " 201410013970.5 "
Chinese invention patent discloses a kind of bridge pier sedimentation on-line monitoring and early warning system based on collimation laser imaging, by base
Laser is installed, lasing fluorescence is successively directed toward next bridge pier, after then carrying out image procossing to light, obtains opposite on quasi- bridge pier
Settling amount.The technique device is made of multiple instruments, and system constitutes complexity, and high-speed rail bridge pier is often positioned in field environment, exists
The complex jammings such as lightning stroke, there are problems for the applicability of the technique device.
Utility model content
Existing high-speed rail bridge pier monitoring technology is primarily present not monitoring in the presence of a harsh environment, be unfavorable for real-time monitoring etc. and ask
Topic, for these problems, the utility model provides a kind of FBG monitoring device of high-speed rail bridge pier sedimentation, using optical fiber light
Grid measure bridge pier sedimentation and deformation as sensing element, and not by field electromagnetic interference influence, remote transmission that can be up to a hundred kilometers is believed
Number, it can be realized distributed real-time monitoring.
For this purpose, the utility model uses following technical scheme:
A kind of FBG monitoring device of high-speed rail bridge pier sedimentation, including the body of a bridge, bridge pier, the first reference stake, the first optical fiber
Grating, the second fiber grating, third fiber grating and the second reference stake；First reference stake and the second reference stake are located at
Middle position between respective body of a bridge following two bridge pier, and it is fixed on ground；First reference stake and the second reference stake are located at
The left and right sides of bridge pier；The left side optical fiber of first fiber grating is fixed on the side of the first reference stake, and right side optical fiber is solid
It is scheduled in the same side of intermediate bridge pier；Second fiber grating is freely suspended in the same side of intermediate bridge pier；It is described
The left side optical fiber of third fiber grating is fixed on position identical with the right side optical fiber of the first fiber grating, right side on intermediate bridge pier
Optical fiber is fixed in the same side of the second reference stake；The left side light of the right side optical fiber of first fiber grating, third fiber grating
It is fine to connect respectively with after the welding of the tail optical fiber at the second fiber grating both ends.
Preferably, the side upper end of the bridge pier is equipped with bridge pier cylindrical projection；The side upper end of first reference stake is set
There is the first reference stake cylindrical projection, the side upper end of second reference stake is equipped with the second reference stake cylindrical projection；All circles
Column protrusion is respectively positioned on identical side, and the height of bridge pier cylindrical projection is higher than another two cylindrical projection, and the first reference stake cylinder is convex
The height of the height and the second reference stake cylindrical projection that rise is equal.
Preferably, the left side Optical Fiber Winding of first fiber grating and the first reference stake cylinder is fixed on using adhesive
In protrusion, after stretched, right side Optical Fiber Winding is simultaneously fixed in bridge pier cylindrical projection using adhesive；The second optical fiber light
Grid are freely suspended in bridge pier cylindrical projection；The left side Optical Fiber Winding of the third fiber grating is simultaneously fixed on bridge using adhesive
In pier cylindrical projection, after stretched, right side Optical Fiber Winding is simultaneously fixed in the second reference stake cylindrical projection using adhesive.
Preferably, first reference stake and the second reference stake it is buried enter ground fix.
Preferably, the tail optical fiber of the tail optical fiber of the first fiber grating left side one end and third fiber grating right side one end, point
Do not continue to concatenate with next bridge pier monitoring fiber grating.
Compared with prior art, the utility model has the beneficial effects that
(1) using fiber grating as sensing element measurement bridge pier sedimentation and deformation, not by field electromagnetic interference influence, can on
Hundred kilometers of remote transmission signal, and dozens of grating measuring point can be concatenated on an optical fiber, it may be implemented distributed real-time
Monitoring.
(2) in implementation process, it only need to be embedded to reference stake, fiber grating can carry out measurement after being fastened, easy to operate.
(3) structure is simple, easy to use, adapts to the real-time monitoring under adverse circumstances.
Detailed description of the invention
Fig. 1 is a kind of structural representation of the FBG monitoring device of high-speed rail bridge pier sedimentation provided by the utility model
Figure.
Description of symbols: the 1, body of a bridge；2, bridge pier；3, the first reference stake；4, the first fiber grating；5, the second optical fiber light
Grid；6, third fiber grating；7, the second reference stake；2-1, bridge pier cylindrical projection；3-1, the first reference stake cylindrical projection；7-1,
Two reference stake cylindrical projections.
Specific embodiment
With reference to the accompanying drawing and specific embodiment is described in detail the utility model, specific embodiment therein and says
It is bright to be only used to explain the utility model, but be not intended to limit the scope of the present invention.
As shown in Figure 1, the utility model discloses a kind of FBG monitoring device of high-speed rail bridge pier sedimentation, including the body of a bridge
1, bridge pier 2, the first reference stake 3, the first fiber grating 4, the second fiber grating 5, third fiber grating 6 and the second reference stake 7；Institute
It states the first reference stake 3 and the second reference stake 7 is located at middle position between respective 1 following two bridge pier 2 of the body of a bridge, and be fixed on
Ground；First reference stake 3 and the second reference stake 7 are located at the left and right sides of bridge pier 2；The left side of first fiber grating 4
Optical fiber is fixed on the side of the first reference stake 3, and right side optical fiber is fixed in the same side of intermediate bridge pier 2；Second light
Fine grating 5 is freely suspended in the same side of intermediate bridge pier 2；The left side optical fiber of the third fiber grating 6 is fixed on centre
Position identical with the right side optical fiber of the first fiber grating 4, right side optical fiber are fixed on the same side of the second reference stake 7 on bridge pier 2
On face；The right side optical fiber of first fiber grating 4, third fiber grating 6 left side optical fiber respectively with 5 both ends of the second fiber grating
It connects after tail optical fiber welding.
Specifically, the side upper end of the bridge pier 2 is equipped with bridge pier cylindrical projection 2-1；On the side of first reference stake 3
End is equipped with the first reference stake cylindrical projection 3-1, and the side upper end of second reference stake 7 is equipped with the second reference stake cylindrical projection 7-
1；All cylindrical projections are respectively positioned on identical side, and the height of bridge pier cylindrical projection 2-1 is higher than another two cylindrical projection, and first
The height of reference stake cylindrical projection 3-1 and the height of the second reference stake cylindrical projection 7-1 are equal.
Specifically, it is round to be fixed on the first reference stake for the left side Optical Fiber Winding of first fiber grating 4 and use adhesive
On column protrusion 3-1, after stretched, right side Optical Fiber Winding is simultaneously fixed on bridge pier cylindrical projection 2-1 using adhesive；Described
Two fiber gratings 5 are freely suspended on bridge pier cylindrical projection 2-1；The left side Optical Fiber Winding of the third fiber grating 6 simultaneously uses
Adhesive is fixed on bridge pier cylindrical projection 2-1, and after stretched, right side Optical Fiber Winding is simultaneously fixed on the second base using adhesive
On quasi- stake cylindrical projection 7-1.
Specifically, first reference stake 3 and the second reference stake 7 it is buried enter ground fix.
Specifically, the tail optical fiber of 6 right side one end of tail optical fiber and third fiber grating of described first fiber grating, 4 left side one end,
Continue to concatenate with next bridge pier monitoring fiber grating respectively.
Embodiment
A kind of manufacturing process of the FBG monitoring device of high-speed rail bridge pier sedimentation is as follows:
Firstly, the ground in the middle position between the bridge pier 2 of left, center, right three, makes a call to 2 deep holes, it is embedded to 2 bases vertically
Quasi- stake, i.e. the first reference stake 3 and the second reference stake 7 will not be settled since the upper end of reference stake does not stress without weight, institute
Can be used as datum mark；
Secondly, being fixed respectively in the upper end of bridge pier 2, the first reference stake 3 and the second reference stake 7 by cement or adhesive
One cylindrical projection, for winding and fixing optical fiber；
Finally, winding the tail of the first fiber grating 4 on the first reference stake cylindrical projection 3-1 above the first reference stake 3
Fibre, and fixed using adhesive, the first fiber grating 4 is then stretched, wave length shift 2nm is made, then winds other end tail optical fiber
And it is fixed on the cylindrical projection 2-1 of intermediate bridge pier 2；Using the fixed third fiber grating 6 of similar method；Second fiber grating
5 are freely suspended on the cylindrical projection 2-1 of intermediate bridge pier 2, then use optical fiber bonding machine by the first fiber grating 4, third light
The tail optical fiber of fine grating 6 and the second fiber grating 5 on intermediate bridge pier 2 welds.
First fiber grating 4 and the other end of tail optical fiber of third fiber grating 6 can monitor optical fiber light with next bridge pier
Grid continue to concatenate.
Bridge pier Monitoring method of the subsidence is as follows: when sedimentation deformation occurs for bridge pier 2, the first fiber grating 4 of two pre-stretchings
Variation is generated with the tension of third fiber grating 6, wavelength drifts about.Meanwhile variation of ambient temperature can make the first fiber grating
4, there is in the same direction, equivalent wave length shift in the second fiber grating 5 and third fiber grating 6, using optical fiber raster wavelength demodulator
Monitor the wave length shift situation of all fiber gratings.The drift value of first fiber grating 4, third fiber grating 6 is subtracted second
The wavelength shift of fiber grating 5 rejects the wavelength drift of the first fiber grating 4 caused by environment temperature, third fiber grating 6
It moves, can be obtained and the first fiber grating of bring 4,6 wavelength shift of third fiber grating are settled by bridge pier, and then corresponded to
Strain value；In conjunction between bridge pier cylindrical projection 2-1 and the first reference stake cylindrical projection 3-1, the second reference stake cylindrical projection 7-1
Two fiber lengths, the length varying value of this section of optical fiber can be obtained；In conjunction with a bridge pier cylindrical projection 2-1 and the first base
The isosceles triangle that quasi- stake cylindrical projection 3-1, the second reference stake cylindrical projection 7-1 are constituted carries out calculating solution, since obtaining
The length varying value (i.e. the length varying value of optical fiber) of two waist edges of isosceles triangle, then according to the geometrical characteristic of triangle and
Trigonometric function relationship push away isosceles triangle height change (i.e. bridge pier sedimentation) situation.
The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this
Made any modification, equivalent replacement and improvement etc., should be included in this reality within the spirit and spirit of utility model
Within novel protection scope.
Claims (5)
1. a kind of FBG monitoring device of high-speed rail bridge pier sedimentation, including the body of a bridge (1), bridge pier (2), the first reference stake (3), the
One fiber grating (4), the second fiber grating (5), third fiber grating (6) and the second reference stake (7), it is characterised in that: described
First reference stake (3) and the second reference stake (7) are located at the middle position between the respective body of a bridge (1) following two bridge pier (2), and
It is fixed on ground；First reference stake (3) and the second reference stake (7) are located at the left and right sides of bridge pier (2)；First optical fiber
The left side optical fiber of grating (4) is fixed on the side of the first reference stake (3), and right side optical fiber is fixed on the identical of intermediate bridge pier (2)
On side；Second fiber grating (5) is freely suspended in the same side of intermediate bridge pier (2)；The third fiber grating
(6) left side optical fiber is fixed on position identical with the right side optical fiber of the first fiber grating (4), right side light on intermediate bridge pier (2)
Fibre is fixed in the same side of the second reference stake (7)；The right side optical fiber of first fiber grating (4), third fiber grating (6)
Left side optical fiber is connected with after the welding of the tail optical fiber at the second fiber grating (5) both ends respectively.
2. a kind of FBG monitoring device of high-speed rail bridge pier sedimentation according to claim 1, it is characterised in that: the bridge
The side upper end of pier (2) is equipped with bridge pier cylindrical projection (2-1)；The side upper end of first reference stake (3) is equipped with the first benchmark
The side upper end of stake cylindrical projection (3-1), second reference stake (7) is equipped with the second reference stake cylindrical projection (7-1)；All
Cylindrical projection is respectively positioned on identical side, and the height of bridge pier cylindrical projection (2-1) is higher than another two cylindrical projection, the first reference stake
The height of the height of cylindrical projection (3-1) and the second reference stake cylindrical projection (7-1) is equal.
3. a kind of FBG monitoring device of high-speed rail bridge pier sedimentation according to claim 2, it is characterised in that: described the
The left side Optical Fiber Winding of one fiber grating (4) is simultaneously fixed in the first reference stake cylindrical projection (3-1) using adhesive, by drawing
After stretching, right side Optical Fiber Winding is simultaneously fixed on bridge pier cylindrical projection (2-1) using adhesive；Second fiber grating (5) is certainly
By being suspended on bridge pier cylindrical projection (2-1)；The left side Optical Fiber Winding of the third fiber grating (6) is simultaneously fixed using adhesive
On bridge pier cylindrical projection (2-1), after stretched, right side Optical Fiber Winding is simultaneously fixed on the second reference stake cylinder using adhesive
On raised (7-1).
4. a kind of FBG monitoring device of high-speed rail bridge pier sedimentation according to any one of claim 1 to 3, feature
Be: first reference stake (3) and the second reference stake (7) it is buried enter ground fix.
5. a kind of FBG monitoring device of high-speed rail bridge pier sedimentation according to claim 4, it is characterised in that: described the
The tail optical fiber of tail optical fiber and third fiber grating (6) right side one end of one end, is supervised with next bridge pier respectively on the left of one fiber grating (4)
Fiber grating is surveyed to continue to concatenate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821436696.2U CN208588349U (en) | 2018-09-03 | 2018-09-03 | A kind of FBG monitoring device of high-speed rail bridge pier sedimentation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821436696.2U CN208588349U (en) | 2018-09-03 | 2018-09-03 | A kind of FBG monitoring device of high-speed rail bridge pier sedimentation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208588349U true CN208588349U (en) | 2019-03-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821436696.2U Withdrawn - After Issue CN208588349U (en) | 2018-09-03 | 2018-09-03 | A kind of FBG monitoring device of high-speed rail bridge pier sedimentation |
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| CN (1) | CN208588349U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108759780A (en) * | 2018-09-03 | 2018-11-06 | 刘绍波 | A kind of FBG monitoring device of high ferro bridge pier sedimentation |
-
2018
- 2018-09-03 CN CN201821436696.2U patent/CN208588349U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108759780A (en) * | 2018-09-03 | 2018-11-06 | 刘绍波 | A kind of FBG monitoring device of high ferro bridge pier sedimentation |
| CN108759780B (en) * | 2018-09-03 | 2024-02-20 | 刘绍波 | Fiber bragg grating monitoring device for high-speed railway pier settlement |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20190308 Effective date of abandoning: 20240220 |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20190308 Effective date of abandoning: 20240220 |