CN206862297U - Distributed sensing fiber prestretching sticker - Google Patents
Distributed sensing fiber prestretching sticker Download PDFInfo
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- CN206862297U CN206862297U CN201720802168.3U CN201720802168U CN206862297U CN 206862297 U CN206862297 U CN 206862297U CN 201720802168 U CN201720802168 U CN 201720802168U CN 206862297 U CN206862297 U CN 206862297U
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- optical fiber
- distributed sensing
- prestretching
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- sensing fiber
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- 239000000835 fiber Substances 0.000 title claims abstract description 40
- 239000013307 optical fiber Substances 0.000 claims abstract description 53
- 230000007704 transition Effects 0.000 claims description 3
- 238000012544 monitoring process Methods 0.000 abstract description 12
- 238000000034 method Methods 0.000 abstract description 9
- 238000005259 measurement Methods 0.000 abstract description 8
- 238000010276 construction Methods 0.000 abstract description 4
- 238000005516 engineering process Methods 0.000 abstract description 4
- 230000008859 change Effects 0.000 description 6
- 239000003292 glue Substances 0.000 description 5
- 230000036541 health Effects 0.000 description 2
- 230000035772 mutation Effects 0.000 description 2
- 238000012805 post-processing Methods 0.000 description 2
- 229920000297 Rayon Polymers 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000463 material Substances 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
- 229920000647 polyepoxide Polymers 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000007480 spreading Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
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Abstract
The utility model belongs to optical fiber sensing technology and civil structure project security monitoring field,More particularly to a kind of distributed sensing fiber prestretching sticker,Including extending along its length and length-adjustable main part,It is respectively arranged on the main part both ends and the relative pre- pull arm located at described main part the same side,The pre- pull arm is comprised at least with the main part not in the clamping part of same length bearing of trend,The clamping part is provided with to accommodate the detent of the optical fiber and the fastening assembly to the fixation optical fiber,After above technical scheme,Distributed sensing fiber prestretching sticker of the present utility model is simple in construction,It can effectively control the pre-tensile stress of optical fiber uniform,Complicated sensor measurement tension need not be used during use,It is easy to use,It is easily operated,Low cost,Later data can not only be facilitated to handle,Also logarithmic strain information in data handling procedure will not be caused to be deleted by mistake.
Description
Technical field
The utility model belongs to optical fiber sensing technology and civil structure project security monitoring field, and in particular to one kind distribution
Formula sensor fibre prestretching sticker.
Background technology
Optical fiber sensing technology has numerous advantages, and its small volume, electromagnetism interference are without drift, good endurance, transmission range
Far, and quasi-distributed/distributed real-time monitoring and other advantages can be carried out, thus is widely used in monitoring structural health conditions field, be
Good sensor for civil engineering structure Long Period Health Monitoring.Fibre optical sensor has optical fiber grating sensing using more
Device and distributed sensor, in recent years, distributed sensor is widely used, and can be used for supervising tunnel structure, bridge structure, gas-liquid
The isostructural deformation of body pipeline, the monitoring for the longer structure of distance are very applicable.
However, at the scene in monitoring works, distribution type fiber-optic lays no respective standard.Can in order that obtaining distribution type fiber-optic
With the compressive strain of measurement structure, need to carry out it prestretching when fibre ribbon is laid, but the unfixed mark of this pre-tensile stress
Standard, manual site's viscose glue lay fibre ribbon, cannot control the size of fibre ribbon tension, can only rely on the experience of workmen,
This results in the pre-tensile stress applied during live laying optical fiber band and varied, and last monitoring result is shown, fibre ribbon is answered
It is huge to become difference.
Finally the result of monitoring gained can be eliminated by subtracting initial strain, but this method is not omnipotent
's.If be acquired with NEUBREX Acquisition Instruments, sometimes in the measurement of one section of fibre ribbon, several measuring points can be gathered less
Data, tension is varied when being laid plus fibre ribbon before, and after subtracting initial strain, obtained strain, which also has, to be had greatly
It is small., it is necessary to constantly leave out the strain point of mutation so in post-processing., it is necessary to artificially be sentenced in strain path is left out
Whether disconnected is bad point, not only needs to consume certain time, it is also possible to artificial error in judgement, uprush the strain of a measuring point and sentence
Break as a bad point, this has just deleted effective information by mistake.
Thus lay preferable fibre ribbon, it is desirable to which ess-strain is uniform when fibre ribbon is laid, the strain in a fibre ribbon
Change can not be too violent., also will not shadow after follow-up Monitoring Data subtracts initial strain even if then there is the situation of few collection
Most measurement result is rung, can only influence the strain value of the measuring point at each measuring section both ends.
A kind of in view of problem above, it is necessary to device is used in fibre ribbon the procedures of establishment so that artificial laying optical fiber band
During, the tension in fibre ribbon is always maintained at uniformly, and the strain that last instrument measures is also visibly homogeneous, so follow-up measurement
When as a result subtracting the strain in initial measurement, strain mutation can greatly reduce, so that in post-processing data, without mistake
More algorithms are handled for result, will not also cause to delete logarithmic strain information by mistake because of these algorithms.
The content of the invention
The utility model provides a kind of distributed sensing fiber prestretching sticker simple in construction, easily operated, to
Solve the problems, such as that distribution type fiber-optic pre-tensile stress in taping process changes greatly in the prior art, so that distribution type fiber-optic
Strain ratio it is more uniform, not only facilitate later data to handle, will not also cause logarithmic strain information in data handling procedure to be missed
Delete.
To reach above-mentioned purpose, the technical solution adopted in the utility model is：A kind of distributed sensing fiber prestretching is pasted
Device, including extend along its length and length-adjustable main part, be respectively arranged on the main part both ends and relative be located at
The pre- pull arm of described main part the same side, the pre- pull arm comprise at least clamping part, and the clamping part is provided with to hold
Receive the optical fiber detent and the fastening assembly to the fixation optical fiber.
Further, the main part include adjustment bolt, positioned at the adjustment bolt length bearing of trend and with it is described
The outboard end of the adjusting nut of one end spiral connection of adjustment bolt, the adjustment bolt and the adjusting nut is respectively equipped with
The pre- pull arm.
Further, the pre- pull arm also includes connecting portion, and the connecting portion and the clamping part are L-shaped, the company
The end of socket part and the end of the main part are fixedly linked.
Further, the end of the adjusting nut is provided with to determine the spiral dial of its anglec of rotation, the spiral shell
Rotation dial is provided with graduation apparatus.
Further, the detent is located at the end bottom surface of the clamping part, the bearing of trend of the detent
It is parallel with the length direction of the main part, and the detent penetrates the end bottom of the clamping part along its length
Face.
Further, the rubber to fixed optical fiber and scattered optical fiber surface local pressure is provided with inside the detent
Glue.
Further, it is provided with and is connected with the detent and to the folder between the upper and lower part of the clamping part
Hold the bifurcated of the inner side extension in portion.
Further, the upper and lower part of the bifurcated is parallel, and the upper and lower part of the bifurcated is in the bifurcated
Afterbody be connected by a tapering transition section.
Further, the clamping part is provided with the longitudinally disposed connecting hole in the middle part of the bifurcated, described tight
Gu component includes the fishbolt to match with the connecting hole and the binding nut to match with the fishbolt.
Further, the head of the fishbolt is provided with the clamping knob for being easy to manually adjust.
After above technical scheme, distributed sensing fiber prestretching sticker of the present utility model is simple in construction, makes
Used time need not use complicated sensor measurement tension, convenient to use, low cost.In use, by optical fiber located at fixed
Between in the groove of position and optical fiber is fixed on into two pre- pull arm by fastening assembly, when main part extends, fiber lengths are elongated,
After completing pre-stretching, optical fiber directly can be pasted on body structure surface to be measured, it is very convenient.Pasting the optical fiber of certain length
Afterwards, can be with relaxes fiber by unscrewing fishbolt, and the pre-stretching and laying of next section of optical fiber are moved to, method is simple, easily
In operation.When being pre-stretched to optical fiber, the device controls the anglec of rotation of adjusting nut by observing spiral dial,
The extended length of main part can be accurately controlled, ensures that the prestretching length per equal length section optical fiber is consistent, so as to control optical fiber
Pre-tensile stress it is uniform.
Brief description of the drawings
Accompanying drawing 1 is the top view of distributed sensing fiber prestretching sticker of the present utility model；
Accompanying drawing 2 is the front view of distributed sensing fiber prestretching sticker of the present utility model；
Accompanying drawing 3 is the side view of distributed sensing fiber prestretching sticker of the present utility model.
Wherein, 1, main part；11st, adjustment bolt；12nd, adjusting nut；13rd, spiral dial；2nd, pre- pull arm；21st, press from both sides
Hold portion；210th, detent；211st, bifurcated；212nd, tapering transition section；213rd, fishbolt；214th, binding nut；215th, clamp
Knob；22nd, connecting portion；3rd, optical fiber.
Embodiment
Below in conjunction with the accompanying drawings and embodiment the utility model is described in further detail.
As shown in Figure 1 to Figure 3, a kind of distributed sensing fiber prestretching sticker, be particularly suitable for use in ribbon fiber 3, bag
Include extension and length-adjustable main part 1 and the pre- pull arm 2 for being respectively arranged on the both ends of main part 1 along its length.Two
Pre- pull arm 2 is located at the same side of main part 1 and is oppositely arranged, and the shape of two pre- pull arm 2 is identical.To improve pre- pull arm 2
Rigidity, the material of pre- pull arm 2 uses steel.
Main part 1 includes adjustment bolt 11 and the adjusting nut 12 being connected with one end spiral of adjustment bolt 11, adjustment
Nut 12 is located at the length bearing of trend of adjustment bolt 11, and the outboard end of adjustment bolt 11 and adjusting nut 12 is respectively equipped with pre-
Pull arm 2.By rotating adjusting nut 12, thus it is possible to vary the length of main part 1.
The end of adjusting nut 12 is provided with to determine the spiral dial 13 of its anglec of rotation.Set on spiral dial 13
There is the graduation apparatus from 0 ° to 360 °, there is a scale every 10 °, compare graduation apparatus, the angle certain by rotating adjusting nut 12
Degree, so as to obtain the quantitative length change of main part 1.
Main part 1 is during length change, and only adjusting nut 12 is rotated, and the angle of pre- pull arm 2 of both sides is not
Change.
The pre- pull arm 2 includes connecting portion 22 and clamping part 21, and connecting portion 22 and clamping part 21 are L-shaped, the connection
The end in portion 22 and the end of main part 1 are fixedly linked, and clamping part 21 and main part 1 are perpendicular.The section of clamping part 21 is preferred
It is square or circular.
Set in the end bottom surface of clamping part 21 to accommodate the detent 210 of optical fiber 3, the extension of detent 210
Direction is parallel with the length direction of main part 1, and detent 210 penetrates the end bottom of clamping part 21 along its length
Face.Point for being connected with detent 210 and extending to the inner side of clamping part 21 is provided between the upper and lower part of clamping part 21
Fork 211.The upper and lower part of bifurcated 211 is parallel, and the upper and lower part of the bifurcated 211 passes through a taper in its afterbody
Section 212 is crossed to be connected.
Rubber is provided with the inside of detent 210, rubber is to fixed optical fiber 3 and disperses the pressure on the surface of optical fiber 3, no
As for making, the local pressure of optical fiber 3 is excessive.
Clamping part 21 is provided with positioned at the longitudinally disposed connecting hole at the middle part of bifurcated 211 and to described in fixation
The fastening assembly of optical fiber 3.Fastening assembly include the fishbolt 213 that matches with the connecting hole and with the clamping spiral shell
The binding nut 214 that bolt 213 matches.
Optical fiber 3 is put into the detent 210 of pre- pull arm 2, with fishbolt 213 adjust bifurcated 211 top and
The distance between bottom, optical fiber 3 can be clamped or unclamped.
For ease of operating fishbolt 213, the clamping knob for being easy to manually adjust is provided with the head of fishbolt 213
215。
Explanation carries out the detailed mistake of the laying of optical fiber 3 using the distributed sensing fiber prestretching sticker of the present embodiment below
Journey.It should be noted that procedure below is only a certain specific embodiment of the present utility model, it is impossible in this, as to this practicality
The restriction of the structure of new distributed sensing fiber prestretching sticker, function or performance.
The length of device of the present utility model main part 1 before pre-stretching is 1m, width 20cm, width away from
From the length of i.e. clamping part 21.The size of clamping part 21 is 20cm × 3cm × 3cm, and the radius of curvature of detent 210 is 5mm, fixed
The radius of position groove 210 is more than the radius of optical fiber 3.
Optical fiber 3 is laid in and treated by geodesic structure, optical fiber 3 is made every 1 meter on number, from one end end of optical fiber 3 to another
Successively respectively marked as AB sections, BC sections, CD sections etc., AB sections are pasted first, AB sections are penetrated into determining for device in one end end
Among the groove 210 of position, rubber is provided with detent 210.Rotate the clamping knob 215 at A ends so that fishbolt 213, which is given, to be divided
The power of 211 1 contractions is pitched, then the end of pre- pull arm 2 clamps the A ends of optical fiber 3.The B ends of optical fiber 3 are stretched but do not needed
Apply pre-tensile stress, the clamping knob 215 at B ends is tightened.So as to which a length of 1m optical fiber 3 is fixed among device.
There is the relation as shown in formula (1) between the forward travel distance and the rotational angle of adjusting nut 12 of adjusting nut 12：
360 × P=S of α ÷ (1)
In formula (1), α is the angle that adjusting nut 12 rotates, and P is pitch, and S is forward travel distance.According to national standard GB/T
196-2003, the Major Diam d=30mm of present apparatus nut, pitch diameter of thread d2=28.701mm, diameter of thread d1=
27.835mm, pitch P=2mm, it is possible to by rotating adjusting nut 12, change the distance of advance.
It is complete by 1000 μ ε laying optical fibers 3 if monitoring compressive strain is within 1000 μ ε in actual application
Enough, there is the relation as shown in formula (2) between monitoring strain and the extended length of optical fiber 3：
S ÷ L=ε (2)
In formula (2), ε is the strain of optical fiber 3, and unit is that microstrain μ ε, S are the extended lengths of optical fiber 3, in the present apparatus,
The length that namely adjusting nut 12 advances, L are the AB segment length of optical fiber 3, the L=1m in the present apparatus.1000 μ ε cause AB sections
Elongated distance is 1mm.The forward travel distance S=1mm of device adjusting nut 12 can be obtained by formula (2), can be calculated by formula (1)
It it is 180 ° to the anglec of rotation.1mm is very difficult for manually controlling, but is only needed adjusting nut using during the present apparatus
12 control spiral dials 13 rotate 180 °.
After the pre-stretching for completing the AB sections of optical fiber 3, the side that the device is provided with to optical fiber 3 is placed on body structure surface to be measured,
Carry out tentatively fixed, treat 30 seconds or so in optical fiber 3 and body structure surface junction to be measured gluing, glue is curable, now prestretching
Stress is had been applied in AB sections, and has been pasted onto on works to be measured.Clamping knob 215 is rotated afterwards, is unclamped and is clamped
Bolt 213 takes out the AB sections pasted, then lays BC sections.
Continue to lay by above flow, lay and finish until all optical fiber 3, then carry out second glue spreading and fix, in the table of optical fiber 3
Face applies AB glue or epoxy resin, to ensure durability.So, certain pre-tensile stress is all maintained inside all optical fiber 3.
After above technical scheme, distributed sensing fiber prestretching sticker of the present utility model is simple in construction, energy
The pre-tensile stress of effectively control optical fiber is uniform, and complicated sensor measurement tension need not be used during use, easy to use, easily
In operation, low cost.Later data can not only be facilitated to handle, will not also cause logarithmic strain information in data handling procedure to be missed
Delete.
For above-described embodiment only to illustrate technical concepts and features of the present utility model, its object is to allow be familiar with technique
Personage can understand content of the present utility model and implement according to this, the scope of protection of the utility model can not be limited with this.
All equivalent change or modifications made according to the utility model Spirit Essence, should all cover the scope of protection of the utility model it
It is interior.
Claims (10)
- A kind of 1. distributed sensing fiber prestretching sticker, it is characterised in that：Including extending along its length and adjustable length Main part, be respectively arranged on the main part both ends and the relative pre- pull arm located at described main part the same side, it is described pre- Pull arm comprises at least clamping part, and the clamping part is provided with to accommodate the detent of the optical fiber and to fixed institute State the fastening assembly of optical fiber.
- A kind of 2. distributed sensing fiber prestretching sticker according to claim 1, it is characterised in that：The main part Including adjustment bolt, positioned at the adjustment bolt length bearing of trend and the adjustment that is connected with one end spiral of the adjustment bolt The outboard end of nut, the adjustment bolt and the adjusting nut is respectively equipped with the pre- pull arm.
- A kind of 3. distributed sensing fiber prestretching sticker according to claim 1, it is characterised in that：The pre- handle Arm also includes connecting portion, and the connecting portion and the clamping part are L-shaped, the end of the end of the connecting portion and the main part It is fixedly linked.
- A kind of 4. distributed sensing fiber prestretching sticker according to claim 2, it is characterised in that：The adjustment spiral shell Female end is provided with to determine the spiral dial of its anglec of rotation, and the spiral dial is provided with graduation apparatus.
- A kind of 5. distributed sensing fiber prestretching sticker according to any one of Claims 1-4, it is characterised in that： The detent is located at the end bottom surface of the clamping part, the length of the bearing of trend of the detent and the main part Direction is parallel, and the detent penetrates the end bottom surface of the clamping part along its length.
- A kind of 6. distributed sensing fiber prestretching sticker according to claim 5, it is characterised in that：The positioning is recessed The rubber to fixed optical fiber and scattered optical fiber surface local pressure is provided with inside groove.
- A kind of 7. distributed sensing fiber prestretching sticker according to claim 5, it is characterised in that：The clamping part Upper and lower part between be provided be connected with the detent and to the clamping part inner side extend bifurcated.
- A kind of 8. distributed sensing fiber prestretching sticker according to claim 7, it is characterised in that：The bifurcated Upper and lower part is parallel, and the upper and lower part of the bifurcated is connected in the afterbody of the bifurcated by a tapering transition section Connect.
- A kind of 9. distributed sensing fiber prestretching sticker according to claim 7, it is characterised in that：The clamping part The longitudinally disposed connecting hole being provided with the middle part of the bifurcated, the fastening assembly include matching with the connecting hole Fishbolt and the binding nut that matches with the fishbolt.
- A kind of 10. distributed sensing fiber prestretching sticker according to claim 9, it is characterised in that：The clamping The head of bolt is provided with the clamping knob for being easy to manually adjust.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720802168.3U CN206862297U (en) | 2017-07-04 | 2017-07-04 | Distributed sensing fiber prestretching sticker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720802168.3U CN206862297U (en) | 2017-07-04 | 2017-07-04 | Distributed sensing fiber prestretching sticker |
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| Publication Number | Publication Date |
|---|---|
| CN206862297U true CN206862297U (en) | 2018-01-09 |
Family
ID=60829518
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720802168.3U Active CN206862297U (en) | 2017-07-04 | 2017-07-04 | Distributed sensing fiber prestretching sticker |
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| CN (1) | CN206862297U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112490831A (en) * | 2020-11-20 | 2021-03-12 | 北方激光研究院有限公司 | Optical fiber stress long-term maintaining device |
| CN118603376A (en) * | 2024-08-08 | 2024-09-06 | 南京隆沃科技有限公司 | Perimeter warning device for bridge stress monitoring based on grating optical fiber |
-
2017
- 2017-07-04 CN CN201720802168.3U patent/CN206862297U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112490831A (en) * | 2020-11-20 | 2021-03-12 | 北方激光研究院有限公司 | Optical fiber stress long-term maintaining device |
| CN118603376A (en) * | 2024-08-08 | 2024-09-06 | 南京隆沃科技有限公司 | Perimeter warning device for bridge stress monitoring based on grating optical fiber |
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