CN205861042U - A kind of fiber-optic grating sensor based on transformer station's settlement measurement - Google Patents
A kind of fiber-optic grating sensor based on transformer station's settlement measurement Download PDFInfo
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- CN205861042U CN205861042U CN201620794103.4U CN201620794103U CN205861042U CN 205861042 U CN205861042 U CN 205861042U CN 201620794103 U CN201620794103 U CN 201620794103U CN 205861042 U CN205861042 U CN 205861042U
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- fiber
- connector
- transformer station
- bragg grating
- sensor based
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Abstract
This utility model relates to a kind of fiber-optic grating sensor based on transformer station's settlement measurement, including the first connector (1) being sequentially connected with from top to bottom, Fiber Bragg Grating FBG (2), the second connector (3), stretching spring (4) and the 3rd connector (5), described the first connector (1) also fixes the reference point on linker directrix plane, the also fixing precipitum connecting transformer station of the 3rd described connector (5).Compared with prior art, sedimentation deformation amount can be converted to the tension acting on Fiber Bragg Grating FBG exactly by this utility model by this optical fiber settlement sensor, it is further converted in optical fiber the optical parameter of transmission, finally the solution to transmission spectrum obtains sedimentation deformation amount accurately, improve the work efficiency of staff, obtain substantial amounts of settling data in real time；The time of monitoring is short, is not influenced by the adverse circumstances, thus accuracy is greatly improved.
Description
Technical field
This utility model relates to a kind of fiber-optic grating sensor, especially relates to a kind of light based on transformer station's settlement measurement
Fiber grating sensor.
Background technology
Transformer station is the important component part of electrical network, and it plays voltage of transformation in power system, accepts and distribute electric energy, control
The flow direction of electric power processed and the effect of adjustment voltage.Building in transformer station is the power infrastructures ensureing power grid security, by
Mostly building in remote area in transformer station, the geological conditions of there and weather conditions often cause the ground of transformer station to sink
Fall.Security issues become increasingly urgent during construction period and later stage run for transformer substation foundation building.At present, to transformer station
The monitoring method of settlement of foundation mainly uses level monitoring method.This method is to be arranged on now by human at periodic intervals's walkaround inspection
The sedimentation pile crown of field settlement monitoring point, the change utilizing precision level to observe between each settlement observation point and datum mark is sentenced
Disconnected settlement of foundation.But owing to the workload of this monitoring method is extremely tedious, and the data volume recorded is the most less, prison
That surveys is time-consuming longer, and is easily subject to the impact of environmental factors so that the accuracy of judgement is the best.
Fibre Optical Sensor is the optical characteristics unique based on optical fiber and sensing characteristics detects various physical parameters in engineering.
It has higher sensitivity relative to traditional method, is susceptible to electromagnetic interference, and good insulating is corrosion-resistant, long working life, collection
The acquisition of physical parameter information and transmission one, and the advantage such as simple in construction, little, lightweight, the little power consumption of volume.May be used for
Measure the physical parameters such as strain, temperature, pressure, displacement.
The main Monitoring method of the subsidence of prior art has: simple ocular estimate, settlement gauge algorithm, deforms transformation approach.Existing
Settlement measuring device directly measures the relative displacement size between fixing pole brand and sedimentation building, thus obtains settlement of foundation value
Method.Under water during jackstone preloading basement process, fixing bar is likely dumped loading and clashes into and deform upon, can be directly
Have influence on the accuracy of measurement result.And this monitoring method workload is extremely tedious, and the data volume recorded is contrary the most relatively
Few, monitoring time-consuming the longest, and it is easily subject to the impact of environmental factors so that the accuracy of measurement is the best.
Chinese patent 201610142384.X discloses a kind of fiber-optic grating sensor based on transformer station's settlement measurement, by
A piece rod iron with wedge-shaped surface and an isosceles cantilever beam are constituted, and Fiber Bragg Grating FBG is respectively adhered on cantilever beam.
Sensor slip shell is fixed on the equipment of transformer station, and inclined-plane rod iron is fixed on datum plane, as Shifted Reference point.Rod iron
Can be converted into outstanding by the effect of rod iron wedge-shaped surface and the decorative pearl on top of an official cap according to Deposition Situation generation relative displacement, displacement with slip shell
The elastic deformation of arm beam, is delivered to cantilever beam grating to detect strain variation amount size.Compressive stress in this patent is along vertical
In transfers to Fiber Bragg Grating FBG, due to Fiber Bragg Grating FBG be perpendicular to the resolution rate of axial strain low and
Dependent variable is little, finds through test, and the measurement range of its settlement sensor is about 100mm to the maximum, and sensitivity is 150-160pm/
About mm, sedimentation deformation resolution is 1.2-1.3mm, therefore, is easily caused Fiber Bragg Grating FBG fracture, in stability and reality
With life-span upper Shortcomings.
Utility model content
Defect that the purpose of this utility model is contemplated to overcome above-mentioned prior art to exist and provide a kind of based on power transformation
Stand the fiber-optic grating sensor of settlement measurement.
The purpose of this utility model can be achieved through the following technical solutions:
A kind of fiber-optic grating sensor based on transformer station's settlement measurement, including the first connection being sequentially connected with from top to bottom
Part, Fiber Bragg Grating FBG, the second connector, stretching spring and the 3rd connector, the first described connector is also fixing to be connected
Reference point on datum plane, the also fixing precipitum connecting transformer station of the 3rd described connector；
When the precipitum of transformer station occurs sedimentation, sedimentation deformation amount is passed to stretch spring, stretching by the 3rd connector
Corresponding sedimentation deformation amount is converted to the pulling force of correspondence by spring, and is converted into pulling force to optical fiber Bradley by the second connector
The axial tension stress of lattice grating, makes the bragg wavelength of Fiber Bragg Grating FBG that strain modulation to occur, it is achieved sedimentation deformation amount
Measure.Precipitum is Architectural Equipment or the electrical equipment etc. of transformer station.
Fiber Bragg Grating FBG is the principle of the ultraviolet light sensitive characteristic according to doped fiber, uses the strongest ultraviolet light
Laser irradiates the optical fiber of doping, makes fiber core form refractive index periodic distribution vertically, thus forms a reflecting light
Fine grating.The light wave only meeting Bragg condition can be by optical grating reflection, its Bragg condition such as formula (1):
λB=2neffΛ (1)
Wherein, λBIt is the reflection wavelength of Fiber Bragg Grating FBG, neffRepresenting the effective refractive index of fiber core, Λ is light
Index modulation cycle of grating or pitch in fine Bragg grating.The central wavelength lambda of Fiber Bragg Grating FBG reflectionBOnly take
Certainly in neffAnd Λ, when the two changes, central wavelength lambdaBChange be characterized as:
ΔλB/λB=Δ neff/neff+ΔΛ/Λ (2)
When FBG local environment temperature constant, only under the effect of external force field, produce strain variation amount Δ ε, the most also will occur
Drift, drift value with stress changing relation formula (3) is:
ΔλB=λB(1-Pe)Δε (3)
Wherein, PeRepresent the valid elastic-optic constants of Fiber Bragg Grating FBG material.
Experimental test procedures is as follows, and wideband light source is used for producing broadband emergent light, after three-dB coupler, has part to go out
Penetrating and be optically coupled into fine Bragg grating, the reflection light that fine Bragg grating produces can be again introduced into three-dB coupler, have equally
Partially reflective it is optically coupled into spectrogrph, by spectroanalysis instrument to the Analysis of Reflective Spectrum of fine Bragg grating and storage.Fine
Bragg grating is fixed on the platform of measuring stress instrument, and measuring stress instrument can arrange tension numerical value and to fine Prague light
Grid produce corresponding tension.
The first described connector includes the first substrate, the first cover plate and the first linking arm, and the first described substrate sets
Having the first vertical groove, the connection optical fiber at the top of described Fiber Bragg Grating FBG is placed in the first groove, and by
One cover plate is fixed, and the first described linking arm is arranged on the first substrate, and fixing with reference point is connected.
The first described linking arm is square arm, and its horizontal ends is fixing with reference point to be connected, and vertical end is arranged on first
On substrate.
The second described connector includes the second substrate, the second cover plate and the second link, and the second described substrate sets
Having the second vertical groove, the connection optical fiber of the bottom of described Fiber Bragg Grating FBG is placed in the second groove, and by
Two cover plates are fixed, and the second described link is arranged on the second substrate, and are connected with stretching spring.
The second described link is the tripod a being arranged on the second substrate bottom dead center position, described stretching spring
The hook at top is connected with tripod a.Tripod a preferred isosceles triangle frame.
The 3rd described connector is angle-shaped arm always, and its horizontal ends is fixing connects precipitum, and vertical end is provided with triangle
Frame b, the hook of described stretching spring bottom is connected with tripod b.
The spring rate of described stretching spring is less than 0.001kg/mm.
Described Fiber Bragg Grating FBG is the wavelength Fiber Bragg Grating FBG at 1550nm.
Operation principle of the present utility model is:
When there is sedimentation, under the active force sunk, high accuracy stretching spring is stretched effect, occurs equal in magnitude
Change in displacement, thus drive coupled Fiber Bragg Grating FBG to be stretched (compression), make bragg wavelength float
Move.Fiber bragg grating settlement sensor measuring principle is the change of screen periods and the effective refractive index caused based on measured change
Change, thus cause the change of spectra features wavelength, measure settling amount, not by environment by measuring the drift value of characteristic wavelength
Impact.
Compared with prior art, this utility model has the advantage that
(1) fiber-optic grating sensor based on transformer station's settlement measurement, uses fiber Bragg grating sensor to power transformation
Structure foundation in standing, the ground of transformer station's main equipment carry out sedimentation detection and monitoring.By transformer substation foundation sedimentation deformation table
Levy as the lower floor's displacement relative to reference point, then transformer substation foundation sedimentation deformation is converted into stress after-applied to optical fiber Bradley
On lattice grating, so that the modulation strained of its bragg wavelength, and then the foundation settlement displacement of transformer station is carried out in real time
On-line measurement.So this utility model can be greatly enhanced the work efficiency of staff, obtain substantial amounts of settlement number in real time
According to, the time of monitoring is short, is not affected by adverse circumstances, and accuracy is greatly improved.
(2) finding through test, fiber grating can bear bigger tension vertically, thus, with general by edge
Being perpendicular to transfers transmit compressive stress to Fiber Bragg Grating FBG and compare, this utility model has more preferable sensing characteristics,
The stress transfer mode of tension can be greatly enhanced the measurement scope of Fiber Bragg Grating FBG, measure sensitivity, correspondingly
Improve stability and the practicality of Fiber Bragg Grating FBG.Find through test, fiber grating Prague of the present utility model light
Grid settlement measurement range is about 300mm to the maximum, and sensitivity is 17～18pm/mm, and sedimentation deformation resolution is 0.7～0.8mm.
Compared to patent 201610142384.X in background technology, the range of settlement sensor of the present utility model improves 3 times, spirit
Sensitivity and resolution improve about 10 times.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model；
Fig. 2 is the structural representation of the first connector of the present utility model；
Fig. 3 is the structural representation of the second connector of the present utility model；
Fig. 4 is the structural representation of the 3rd connector of the present utility model；
In figure, 1-the first connector, 2-Fiber Bragg Grating FBG, 3-the second connector, 4-stretches spring, and 5-the 3rd connects
Part, 11-the first substrate, 12-the first cover plate, 13-the first linking arm, 31-the second substrate, 32-the second cover plate, 33-second connects
Frame.
Detailed description of the invention
With specific embodiment, this utility model is described in detail below in conjunction with the accompanying drawings.
Embodiment
A kind of fiber-optic grating sensor based on transformer station's settlement measurement, its structure is as it is shown in figure 1, include depending on from top to bottom
First connector 1 of secondary connection, Fiber Bragg Grating FBG the 2, second connector 3, stretching spring 4 and the 3rd connector 5, first even
Fitting 1 also fixes the reference point on linker directrix plane, the also fixing precipitum connecting transformer station of the 3rd connector 5.Stretching bullet
The spring rate of spring 4 is less than 0.001kg/mm.Fiber Bragg Grating FBG 2 is the wavelength Fiber Bragg Grating FBG 2 at 1550nm.
As in figure 2 it is shown, the first connector 1 includes the first substrate the 11, first cover plate 12 and the first linking arm 13, the first substrate
11 are provided with the first vertical groove, and the connection optical fiber at the top of Fiber Bragg Grating FBG 2 is placed in the first groove, and by
One cover plate 12 is fixed, and the first linking arm 13 is arranged on the first substrate 11, and fixing with reference point is connected, the first linking arm
13 is square arm, and its horizontal ends is fixing with reference point to be connected, and vertical end is arranged on the first substrate 11.
As it is shown on figure 3, the second connector 3 includes the second substrate the 31, second cover plate 32 and the second link 33, the second substrate
31 are provided with the second vertical groove, and the connection optical fiber of the bottom of Fiber Bragg Grating FBG 2 is placed in the second groove, and by
Two cover plates 32 are fixed, and the second link 33 is arranged on the second substrate 31, and are connected with stretching spring 4, the second link
33 is the tripod a being arranged on the second substrate 31 bottom dead center position, and the hook at stretching spring 4 top is connected with tripod a.
Tripod a preferred isosceles triangle frame.
As shown in Figure 4, the 3rd connector 5 is angle-shaped arm always, and its horizontal ends is fixing connects precipitum, and vertical end is provided with
Tripod b, the hook bottom stretching spring 4 is connected with tripod b.
When the precipitum of transformer station occurs sedimentation, sedimentation deformation amount is passed to stretch spring 4 by the 3rd connector 5, draws
Stretch spring 4 and corresponding sedimentation deformation amount is converted to the pulling force of correspondence, and by the second connector 3, pulling force is converted into optical fiber
The axial tension stress of Bragg grating 2, makes the bragg wavelength of Fiber Bragg Grating FBG 2 that strain modulation to occur, it is achieved sedimentation position
The measurement of shifting amount.Precipitum is Architectural Equipment or the electrical equipment etc. of transformer station.
The above-mentioned description to embodiment is to be understood that for ease of those skilled in the art and use practicality
Novel.These embodiments obviously easily can be made various amendment by person skilled in the art, and explanation at this
General Principle be applied in other embodiments without through performing creative labour.Therefore, this utility model is not limited to above-mentioned
Embodiment, those skilled in the art according to announcement of the present utility model, the improvement made without departing from this utility model category and
Amendment all should be within protection domain of the present utility model.
Claims (8)
1. a fiber-optic grating sensor based on transformer station's settlement measurement, it is characterised in that include being sequentially connected with from top to bottom
The first connector (1), Fiber Bragg Grating FBG (2), the second connector (3), stretching spring (4) and the 3rd connector (5), institute
The first connector (1) stated also fixes the reference point on linker directrix plane, and the 3rd described connector (5) also fixing connection becomes
The precipitum in power station；
When the precipitum of transformer station occurs sedimentation, sedimentation deformation amount is passed to stretch spring (4) by the 3rd connector (5), draws
Stretch spring (4) corresponding sedimentation deformation amount is converted to correspondence pulling force, and by the second connector (3), pulling force is converted into right
The axial tension stress of Fiber Bragg Grating FBG (2), makes the bragg wavelength of Fiber Bragg Grating FBG (2) that strain modulation to occur, real
The measurement of existing sedimentation deformation amount.
A kind of fiber-optic grating sensor based on transformer station's settlement measurement the most according to claim 1, it is characterised in that institute
The first connector (1) stated includes the first substrate (11), the first cover plate (12) and the first linking arm (13), the first described substrate
(11) being provided with the first vertical groove, the connection optical fiber at the top of described Fiber Bragg Grating FBG (2) is placed on the first ditch
In groove, and being fixed by the first cover plate (12), described the first linking arm (13) is arranged on the first substrate (11), and with ginseng
Examination point is fixing to be connected.
A kind of fiber-optic grating sensor based on transformer station's settlement measurement the most according to claim 2, it is characterised in that institute
The first linking arm (13) stated is square arm, and its horizontal ends is fixing with reference point to be connected, and vertical end is arranged on the first substrate
(11) on.
A kind of fiber-optic grating sensor based on transformer station's settlement measurement the most according to claim 1, it is characterised in that institute
The second connector (3) stated includes the second substrate (31), the second cover plate (32) and the second link (33), the second described substrate
(31) being provided with the second vertical groove, the connection optical fiber of the bottom of described Fiber Bragg Grating FBG (2) is placed on the second ditch
In groove, and being fixed by the second cover plate (32), described the second link (33) is arranged on the second substrate (31), and with draw
Stretch spring (4) to connect.
A kind of fiber-optic grating sensor based on transformer station's settlement measurement the most according to claim 4, it is characterised in that institute
The second link (33) stated is the tripod a being arranged on the second substrate (31) bottom dead center position, described stretching spring (4)
The hook at top is connected with tripod a.
A kind of fiber-optic grating sensor based on transformer station's settlement measurement the most according to claim 1, it is characterised in that institute
The 3rd connector (5) stated is angle-shaped arm always, and its horizontal ends is fixing connects precipitum, and vertical end is provided with tripod b, described
Stretching spring (4) bottom hook be connected with tripod b.
A kind of fiber-optic grating sensor based on transformer station's settlement measurement the most according to claim 1, it is characterised in that institute
The spring rate of the stretching spring (4) stated is less than 0.001kg/mm.
A kind of fiber-optic grating sensor based on transformer station's settlement measurement the most according to claim 1, it is characterised in that institute
The Fiber Bragg Grating FBG (2) stated is the wavelength Fiber Bragg Grating FBG (2) at 1550nm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620794103.4U CN205861042U (en) | 2016-07-26 | 2016-07-26 | A kind of fiber-optic grating sensor based on transformer station's settlement measurement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620794103.4U CN205861042U (en) | 2016-07-26 | 2016-07-26 | A kind of fiber-optic grating sensor based on transformer station's settlement measurement |
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| Publication Number | Publication Date |
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| CN205861042U true CN205861042U (en) | 2017-01-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620794103.4U Expired - Fee Related CN205861042U (en) | 2016-07-26 | 2016-07-26 | A kind of fiber-optic grating sensor based on transformer station's settlement measurement |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106092043A (en) * | 2016-07-26 | 2016-11-09 | 上海电力学院 | A kind of fiber-optic grating sensor based on transformer station's settlement measurement |
| CN106918323A (en) * | 2017-03-29 | 2017-07-04 | 中铁十四局集团有限公司 | Soil body settlement sensor and soil body sedimentation monitoring system |
| CN107655450A (en) * | 2017-10-23 | 2018-02-02 | 沈阳建筑大学 | A kind of high precision optical fiber grating dislocation meter |
-
2016
- 2016-07-26 CN CN201620794103.4U patent/CN205861042U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106092043A (en) * | 2016-07-26 | 2016-11-09 | 上海电力学院 | A kind of fiber-optic grating sensor based on transformer station's settlement measurement |
| CN106092043B (en) * | 2016-07-26 | 2018-10-30 | 上海电力学院 | A kind of fiber-optic grating sensor based on substation's settlement measurement |
| CN106918323A (en) * | 2017-03-29 | 2017-07-04 | 中铁十四局集团有限公司 | Soil body settlement sensor and soil body sedimentation monitoring system |
| CN107655450A (en) * | 2017-10-23 | 2018-02-02 | 沈阳建筑大学 | A kind of high precision optical fiber grating dislocation meter |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170104 Termination date: 20170726 |