CN206627662U - A kind of twin-core straining sensing optical cable - Google Patents
A kind of twin-core straining sensing optical cable Download PDFInfo
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- CN206627662U CN206627662U CN201720249695.6U CN201720249695U CN206627662U CN 206627662 U CN206627662 U CN 206627662U CN 201720249695 U CN201720249695 U CN 201720249695U CN 206627662 U CN206627662 U CN 206627662U
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Abstract
A kind of twin-core straining sensing optical cable of the present utility model, including oval oversheath and the stress sensing unit and temperature sensing unit that are arranged on oversheath both ends, stress sensing unit includes inner sheath and is arranged in the stress sensing core of inner sheath, wrapping around for inner sheath is provided with stiffener, and oversheath coats stiffener and is filled between adjacent two stiffeners and is filled between inner sheath and stiffener；Temperature sensing unit includes aramid fiber enhancement layer and is arranged on the PBT beam tubes of the inner side of aramid fiber enhancement layer, is filled with ointment in PBT beam tubes, PBT beam tubes are equipped with the temperature sensing optical fiber that can dissociate in ointment.It is integrated with stress sensing unit and temperature sensing unit, it is thus possible to temperature and stress are sensed respectively, stress sensing fiber-optic probe result improves sensing accuracy closer to actual value；TEMP core in temperature sensing unit can not influenceed, the temperature data detected is more accurate by extraneous stress substantially in the free activity of ointment.
Description
Technical field
It the utility model is related to optical cable technology field, and in particular to a kind of twin-core straining sensing optical cable.
Background technology
BOTDR, BOTDA, BOFDA sensing technology based on Brillouin scattering principle is current domestic and international most potential biography
Sense technology, the technology can simultaneously measurement temperature and strain two physical quantitys, there is very extensive application prospect, at present
Highly developed application, it is mainly used in the projects under construction such as pipelines and petrochemical pipelines, submarine cable, dam, bridge, subway, tunnel and building,
For measuring, monitoring the quality condition of building.
Crucial component --- sensing optic cable, it is always to restrict it extensively should in the application process of Brillouin's technology
Bottleneck, because the result signal containing temperature and stress simultaneously that Brillouin's technology for detection comes out, it is necessary to which passing through technology will
Two parameters separately could be applied effectively, and tradition is divided to come the more difficult reality of the method for two kinds of parameters by technologies such as algorithms
Existing, at present, in the case of no professional sensing optic cable, most engineering is all using the naked fibre or biography for having no to protect intensity
Feel effect extreme difference outdoor communication optical cable come serve as specialty sensing cable, its disadvantage is exactly short life, and does not reach expection
Sensing effect.Therefore both parameters are separated, it is necessary to research and develop a sensing for being adapted to its application by hardware sensing optic cable
Optical cable is the task of top priority.
The content of the invention
Above-mentioned technical problem be present for prior art, the utility model, which provides one kind, can collect paired temperature and stress point
Supplementary biography sense, extend optical cable service life and improve the twin-core straining sensing optical cable of sensing accuracy.
To achieve the above object, the utility model provides following technical scheme：
A kind of twin-core straining sensing optical cable is provided, including the oversheath of ellipse and is separately positioned on oversheath both ends
Stress sensing unit and temperature sensing unit, the stress sensing unit include inner sheath and are arranged in the stress of the inner sheath
Sense core, stress sensing core for FRP materials, the wrapping around of the inner sheath be provided with some FRP materials plus
Strong bar, some stiffeners coat the stiffener and filled out around the twisted setting of the inner sheath spiral, the oversheath side by side
Fill between adjacent two stiffeners and be filled between inner sheath and stiffener；The temperature sensing unit adds including aramid fiber
Strong layer and be arranged on aramid fiber enhancement layer inner side PBT beam tubes, be filled with ointment in PBT beam tubes, PBT beam tubes are equipped with can be
The temperature sensing optical fiber to dissociate in ointment.
Wherein, the oversheath is the sheath of PE materials.
Wherein, the inner sheath is the sheath of the HYTREL materials of hard-pressed bale.
Wherein, the sticking ointment layer of tool is provided between the inner sheath and oversheath.
Wherein, the diameter of the inner sheath is consistent with the external diameter of the FRP stiffeners.
Wherein, the FRP stiffeners are provided with arranged side by side six, and six FRP stiffeners are equal around the outside of the inner sheath
Even distribution.
The beneficial effects of the utility model：
A kind of twin-core straining sensing optical cable of the present utility model, including ellipse oversheath and be separately positioned on oversheath
The stress sensing unit and temperature sensing unit at both ends, stress sensing unit include inner sheath and are arranged in the stress of inner sheath
Core is sensed, stress sensing core is FRP materials, and inner sheath wraps around the stiffener for being provided with some FRP materials,
Some stiffeners coat stiffener and are filled in adjacent two stiffeners around the twisted setting of inner sheath spiral, oversheath side by side
Between and be filled between inner sheath and stiffener；Temperature sensing unit includes aramid fiber enhancement layer and is arranged on aramid fiber enhancement layer
Inner side PBT beam tubes, is filled with ointment in PBT beam tubes, PBT beam tubes are equipped with the TEMP light that can dissociate in ointment
It is fine.Compared with prior art, the utility model is due to being integrated with stress sensing unit and temperature sensing unit, it is thus possible to temperature
Degree and stress are sensed respectively, and due to there is provided the FRP stiffeners being twisted side by side around inner sheath spiral, allowing optical fiber to have
There is a stronger mechanical performance, extend optical cable service life, the pulling force that can be longitudinally subject to optical cable, which is converted into, horizontal treats side pressure
Power, same material is used with reference to FRP stiffeners and optical fiber, can largely eliminate ambient temperature change and cause
The influence expanded with heat and contract with cold, allow stress sensing fiber-optic probe result closer to actual value, improve sensing accuracy；TEMP
TEMP core in unit can not influenceed, the temperature data detected by extraneous stress substantially in the free activity of ointment
It is more accurate.
Brief description of the drawings
Fig. 1 is a kind of structural representation of twin-core straining sensing optical cable of the present utility model.
Reference：
Oversheath 1；
Stress sensing unit 2, stiffener 21, inner sheath 22, stress sensing core 23；
Temperature sensing unit 3, aramid fiber enhancement layer 31, PBT beam tubes 32, temperature sensing optical fiber 33, ointment 34.
Embodiment
The utility model is described in detail below in conjunction with specific embodiment and accompanying drawing.
A kind of twin-core straining sensing optical cable of the present embodiment, as shown in figure 1, the oversheath 1 of the PE materials including ellipse
It is overall to use squashed structure with the stress sensing unit 2 and temperature sensing unit 3 for being separately positioned on the both ends of oversheath 1, it is convenient
By optical cable Surface Mount to testee surface, it is easy to construction maintenance, stress sensing unit 2 includes inner sheath 22 and is arranged in inner sheath
22 stress sensing core 23, inner sheath 22 be the HYTREL materials of hard-pressed bale, and stress sensing core 23 is FRP material, interior shield
Set 22 wraps around the stiffener 21 for being provided with six FRP materials, and six stiffeners 21 are side by side around the outside of inner sheath 22
Uniform spiral is twisted to be set, and oversheath 1 coats stiffener 21 and is filled between adjacent two stiffeners 21 and is filled in interior shield
Between set 22 and stiffener 21；Temperature sensing unit 3 includes aramid fiber enhancement layer 31 and is arranged on the inner side of aramid fiber enhancement layer 31
PBT beam tubes 32, PBT beam tubes 32 are interior to be filled with ointment 34, and PBT beam tubes 32 are equipped with the TEMP that can dissociate in ointment 34
Optical fiber 33.
Compared with prior art, the utility model is due to being integrated with stress sensing unit 2 and temperature sensing unit 3, thus
Temperature and stress can be sensed respectively, the characteristics of having effectively adapted to Brillouin's technology, be passed when using optical cable as temperature
Sense the used time, it is only necessary to demodulate the fiber data of temperature sensing unit 3, you can the temperature information along obtaining.When optical cable needs
When being applied as stress optical cable, temperature information will be removed in the measurement data of stress sensing unit 2 using temperature sensing unit 3,
Purer stress sensing data will be obtained, so as to monitor the stress distribution situation along optical cable.And due to there is provided
The FRP stiffeners 21 being twisted side by side around the spiral of inner sheath 22, allow optical fiber that there is stronger mechanical performance, extend optical cable and use the longevity
Life, the pulling force that optical cable can be longitudinally subject to be converted into it is horizontal treat lateral pressure, with reference to FRP stiffeners 21 and optical fiber using same
Material, can largely eliminate ambient temperature change caused by the influence expanded with heat and contract with cold, allow stress sensing light
Fine result of detection improves sensing accuracy closer to actual value；TEMP core in temperature sensing unit 3 can be in oil
The free activity of cream 34, is not influenceed, the temperature data detected is more accurate by extraneous stress substantially.In addition, HYTREL materials are
A kind of high-low temperature resistant, the macromolecule polyester elastomeric material that wear-resisting, hardness is moderate, can protect light during processing
Fibre, it is as few as possible that optical fiber is produced outside the stress processed, optical fiber can be tightly wrapped after cooling, integral hardness is moderate, energy
Directly in response to outside stress and pass to optical fiber；Therefore mechanical strength and light stress sensing sensitivity have been taken into account well.
In the present embodiment, the sticking ointment layer of tool is provided between inner sheath 22 and oversheath 1, both secures inner sheath
Relative position between 22 and stiffener 21, also transmit external stress more direct rapid.
In the present embodiment, the diameter of inner sheath 22 is consistent with the external diameter of FRP stiffeners 21, tightly packaged fiber（Inner sheath 22 with
Stress sensing core 23 forms tightly packaged fiber）External diameter it is consistent with the external diameter of stiffener 21, it is ensured that machine suffered by optical fiber processing process
Tool stress is moderate and controllable, has both played a part of optical cable reinforcement, and external stress is delivered in sensor fibre by and can well.
Finally it should be noted that above example is only illustrating the technical solution of the utility model, rather than to this reality
With the limitation of novel protected scope, although being explained with reference to preferred embodiment to the utility model, this area it is general
It is logical it will be appreciated by the skilled person that can be modified to the technical solution of the utility model or equivalent substitution, without departing from this
The spirit and scope of utility model technical scheme.
Claims (6)
1. a kind of twin-core straining sensing optical cable, it is characterized in that：Including oval oversheath and it is separately positioned on oversheath both ends
The stress sensing unit and temperature sensing unit in portion, the stress sensing unit include inner sheath and are arranged in the inner sheath
Stress sensing core, stress sensing core are FRP materials, and wrapping around for the inner sheath is provided with some FRP materials
Stiffener, some stiffeners are set around the inner sheath spiral is twisted side by side, and the oversheath coats the stiffener
And it is filled between adjacent two stiffeners and is filled between inner sheath and stiffener；The temperature sensing unit includes virtue
Synthetic fibre enhancement layer and be arranged on aramid fiber enhancement layer inner side PBT beam tubes, is filled with ointment in PBT beam tubes, PBT beam tubes are equipped with energy
Enough temperature sensing optical fibers to dissociate in ointment.
2. a kind of twin-core straining sensing optical cable according to claim 1, it is characterized in that：The oversheath is the shield of PE materials
Set.
3. a kind of twin-core straining sensing optical cable according to claim 1, it is characterized in that：The inner sheath is hard-pressed bale
The sheath of HYTREL materials.
4. a kind of twin-core straining sensing optical cable according to claim 3, it is characterized in that：Between the inner sheath and oversheath
It is provided with the sticking ointment layer of tool.
5. a kind of twin-core straining sensing optical cable according to claim 1, it is characterized in that：The diameter of the inner sheath and described
The external diameter of FRP stiffeners is consistent.
6. a kind of twin-core straining sensing optical cable according to claim 1, it is characterized in that：The FRP stiffeners are provided with simultaneously
Six of row, six FRP stiffeners are uniformly distributed on the outside of the inner sheath.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720249695.6U CN206627662U (en) | 2017-03-15 | 2017-03-15 | A kind of twin-core straining sensing optical cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720249695.6U CN206627662U (en) | 2017-03-15 | 2017-03-15 | A kind of twin-core straining sensing optical cable |
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| CN206627662U true CN206627662U (en) | 2017-11-10 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108534910A (en) * | 2018-03-19 | 2018-09-14 | 浙江师范大学 | A kind of distributed dual sampling method based on Asymmetric Twin-Core Fiber |
| CN109029832A (en) * | 2018-06-29 | 2018-12-18 | 中国矿业大学 | A method of aquifer water pressure is adopted based on the monitoring of incorporated light fiber sensor |
| CN111736284A (en) * | 2020-07-27 | 2020-10-02 | 中煤科工集团重庆研究院有限公司 | Mining photoelectricity mixed loading cable and flame-proof cable leading-in device thereof |
-
2017
- 2017-03-15 CN CN201720249695.6U patent/CN206627662U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108534910A (en) * | 2018-03-19 | 2018-09-14 | 浙江师范大学 | A kind of distributed dual sampling method based on Asymmetric Twin-Core Fiber |
| CN109029832A (en) * | 2018-06-29 | 2018-12-18 | 中国矿业大学 | A method of aquifer water pressure is adopted based on the monitoring of incorporated light fiber sensor |
| CN111736284A (en) * | 2020-07-27 | 2020-10-02 | 中煤科工集团重庆研究院有限公司 | Mining photoelectricity mixed loading cable and flame-proof cable leading-in device thereof |
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