CN217403389U - Novel distributed optical fiber strain/temperature sensing belt - Google Patents
Novel distributed optical fiber strain/temperature sensing belt Download PDFInfo
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- CN217403389U CN217403389U CN202221493035.XU CN202221493035U CN217403389U CN 217403389 U CN217403389 U CN 217403389U CN 202221493035 U CN202221493035 U CN 202221493035U CN 217403389 U CN217403389 U CN 217403389U
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Abstract
The utility model discloses a novel distributed optical fiber meets an emergency/temperature sensing area, include: an engineered fabric; a strain/temperature sensing optical cable; a wire outlet device; an armor sleeve; one or more strain/temperature sensing optical cables are laid on the engineering fabric, the strain/temperature sensing optical cables are attached to the engineering fabric into a whole in a sewing or weaving mode, one end of the engineering fabric is provided with a wire outlet device, the armored sleeve is fixed on the wire outlet device, and the part, penetrating out of the engineering fabric, of the strain/temperature sensing optical cables penetrates through the wire outlet device along the armored sleeve. The utility model discloses in, through engineering fabric and epoxy resin type flooding adhesive and engineering fabric's strip column structure, promoted and the structure that awaits measuring between the coupling nature, make sensing area work more reliable, improved the sensing and taken the simplicity of laying, the distributed deformation and the temperature monitoring that can extensively be used for tunnel, pile foundation, bridge, steel construction, pipeline also can regard as the intelligent reinforcement material of engineering structure to use simultaneously.
Description
Technical Field
The utility model belongs to the technical field of the optic fibre, concretely relates to novel distributed optical fiber meets an emergency/temperature sensing area.
Background
In recent years, distributed optical fiber sensing technology has attracted more and more attention due to its advantages of being distributed, long-distance, high resolution, etc., and is gradually applied to a plurality of fields. The distributed optical fiber fully utilizes the characteristic of one-dimensional spatial continuous distribution of the optical fiber, can accurately measure the information such as temperature, strain, vibration, damage and the like of any point on the optical fiber along the line, and can sense, remotely monitor and monitor large-scale infrastructure, thereby breaking through a plurality of monitoring problems in the measurement field. At present, the technology becomes a most advanced technology competitively researched and developed internationally, and has wide application in distributed temperature strain monitoring of oil and gas pipelines, structural health monitoring of large buildings such as bridges, dams, tunnels, pile foundations and the like, and intelligent structural state monitoring of airplanes, ships and the like.
The optical fiber is fragile in structure, and the key is that the survival rate of the optical fiber is guaranteed in construction laying and later-stage monitoring. The sensing optical fiber used in the current monitoring is improved from a communication optical cable, and is protected by a hard outer sleeve. The Chinese invention patent, application number 201110212087.5, discloses a metal-based cable-like distributed optical fiber sensor, which implants the distributed optical fiber in the cable manufacturing process synchronously, and the peripheral steel wire bundle is protected, the design greatly improves the survival rate of the optical fiber, but is more suitable for being implanted into the measured object synchronously. At present, for the optical fiber arrangement of the built building, the construction method of opening a groove on the surface and sealing the opening with epoxy or directly adhering the opening to the surface of the building is adopted, the surface opening construction is complex, time and labor are consumed, and the method is not suitable for the condition of short construction period.
Since the distributed optical fiber sensing reflects the temperature and strain changes of the measured object through the temperature and strain changes of the distributed optical fiber sensing, the sensing optical fiber is directly adhered to the surface of a building, so that the coupling between the sensing optical fiber and the measured object is poor, and the measured object change cannot be truly reflected. The Chinese patent of invention, application number 201110160135.0, discloses a metal-based strip-shaped distributed optical fiber sensor, which obtains more contact areas through a strip-shaped structure to improve the coupling property, and a substrate is made of metal material to protect the optical fiber. The problem of coupling of the optical fiber and a measured object is well solved, but because the substrate of the optical fiber sensor is made of metal materials, spot welding is needed during laying, construction time is greatly prolonged, and the optical fiber sensor is not suitable for building surfaces such as concrete and ancient city walls.
Therefore, it is necessary to design a distributed optical fiber sensor which can greatly ensure the survival rate of the optical fiber, is simple and rapid in construction, and keeps good coupling with the measured object. Engineering fabrics such as carbon fiber cloth and glass fiber cloth have high strength, good adhesion with materials such as concrete and steel structures through epoxy resin and simple laying, but how to combine the sensing optical fiber with the engineering fabrics is unknown in monitoring and evaluating the structure while reinforcing the engineering structure.
SUMMERY OF THE UTILITY MODEL
For solving the technical problem that exists among the prior art, the utility model aims to provide a novel distributed optical fiber meets an emergency/temperature sensing area.
In order to realize the purpose, the technical effect is achieved, the utility model adopts the technical scheme that:
a novel distributed optical fiber strain/temperature sensing strip comprising:
an engineered fabric;
a strain/temperature sensing optical cable;
a wire outlet device;
an armored sleeve;
one or more strain/temperature sensing optical cables are laid on the engineering fabric, the strain/temperature sensing optical cables are attached to the engineering fabric into a whole in a sewing or weaving mode, a wire outlet device is arranged at one end of the engineering fabric, the armored sleeve is fixed on the wire outlet device, and the part, penetrating out of the engineering fabric, of the strain/temperature sensing optical cables penetrates through the wire outlet device along the armored sleeve.
Furthermore, the sensing belt is coupled with the structure to be tested through dipping glue, and distributed monitoring of strain/temperature is achieved.
Furthermore, the engineering fabric is strip-shaped, and the width of the engineering fabric is 3-5 cm.
Furthermore, one side of the engineering fabric is subjected to overlocking treatment to form an overlocking line, and a suture line is formed on the engineering fabric through sewing and used for attaching the strain/temperature sensing optical cable and the engineering fabric into a whole.
Further, the strain/temperature sensing optical cable comprises a micro fixed point strain optical cable, a fully-tight strain optical cable or a loose sleeve temperature optical cable.
Furthermore, the diameter of the miniature fixed point strain optical cable is 2-3 mm, the miniature fixed point strain optical cable comprises an optical fiber, a spiral armored pipe and an elastic sheath, the optical fiber is located in the center, the optical fiber is sleeved in the spiral armored pipe, the elastic sheath is tightly wrapped outside the spiral armored pipe, and the optical fiber, the spiral armored pipe and the elastic sheath are fixed at intervals through a binder.
Furthermore, the wire outlet device comprises a plurality of wire outlet holes and mounting holes, the wire outlet device is provided with a sensing belt transition inclined plane for ensuring smooth transition of the strain/temperature sensing optical cable, the number and the size of the wire outlet holes are matched with those of an armored sleeve and the strain/temperature sensing optical cable, the armored sleeve penetrates through the wire outlet holes and is fixed with the wire outlet device through a binder, and the part of the strain/temperature sensing optical cable, which penetrates out of the engineering fabric, penetrates into the armored sleeve and penetrates through the wire outlet device along the armored sleeve.
Furthermore, the wire outlet holes, the mounting holes and the armored sleeves are respectively provided with two strain/temperature sensing optical cables, and the part of each strain/temperature sensing optical cable, which penetrates out of the engineering fabric, penetrates into one armored sleeve which is matched with the strain/temperature sensing optical cable and penetrates through the wire outlet device along the armored sleeve.
Compared with the prior art, the beneficial effects of the utility model are that:
the utility model discloses a novel distributed optical fiber strain/temperature sensing belt, which has a certain width for engineering weaving cloth, and can obtain more contact areas so as to improve the coupling property and the deformation transmissibility; the engineering woven fabric is light in weight and soft, and the coupling performance between the engineering woven fabric and a structure to be tested is improved through the adhesiveness between the engineering woven fabric and the epoxy resin type impregnating adhesive and the strip-shaped structure of the engineering woven fabric, so that the sensing belt is not easy to fall off, and the sensing belt works more reliably; the sensing belt is protected through the high-strength characteristic of the engineering fabric, so that the tensile strength of the product is greatly improved, and the service life of the product is greatly prolonged; engineering fabric can be directly under the effect of epoxy resin class impregnating compound with surveyed the structure like steel construction, the bonding such as concrete, improve the simplicity that the sensing area was laid, can extensively be used for the tunnel, the pile foundation, the bridge, the steel construction, the distributed deformation and the temperature monitoring of pipeline, also can regard as the intelligent reinforced material of engineering structure to use simultaneously, in reinforced structure, also can warp and consolidate the effect and monitor the aassessment to strengthening the solid, strain/temperature sensing optical cable type is diversified, can satisfy different user demands, realize strain/temperature monitoring, the commonality is strong.
Drawings
FIG. 1 is a schematic view of the present invention;
fig. 2 is the structure schematic diagram of the micro fixed point strain cable of the utility model
Fig. 3 is a schematic structural view of the wire outlet device of the present invention; FIG. A is a top view of the wire outlet device; FIG. B is a side view of the line outlet apparatus; fig. C is a sectional view of the wire outlet device.
Detailed Description
The present invention is described in detail below to enable the advantages and features of the present invention to be more easily understood by those skilled in the art, thereby making more clear and definite definitions of the scope of the present invention.
The following presents a simplified summary of one or more aspects in order to provide a basic understanding of such aspects. This summary is not an extensive overview of all contemplated aspects, and is intended to neither identify key or critical elements of all aspects nor delineate the scope of any or all aspects. Its sole purpose is to present some concepts of one or more aspects in a simplified form as a prelude to the more detailed description that is presented later.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.
As shown in fig. 1-3, a novel distributed optical fiber strain/temperature sensing strip includes:
the engineering fabric 1 has certain strength, and meets certain requirements on ductility, deformability, corrosion resistance and the like, the engineering fabric 1 is a fabric strip woven by materials such as carbon fiber cloth, glass fiber cloth and aramid cloth, is in a strip shape, has a width of 3-5cm, is convenient to obtain more contact areas so as to improve coupling and deformation transmissibility, and is convenient to bond epoxy resin impregnating adhesive with the engineering fabric 1 and structures to be tested such as different materials such as steel structures and concrete;
the strain/temperature sensing optical cable comprises a strain/temperature sensing optical cable 2, wherein an engineering fabric 1 is an attached matrix of the strain/temperature sensing optical cable 2, one or more strain/temperature sensing optical cables 2 are distributed on the engineering fabric 1, the strain/temperature sensing optical cable 2 is attached to the engineering fabric 1 into a whole in a sewing or weaving mode, one side of the engineering fabric 1 is subjected to overlocking treatment to form a overlock line 4, and a sewing line 5 is formed on the engineering fabric 1 when the strain/temperature sensing optical cable 2 is attached to the engineering fabric 1 into a whole in a sewing mode;
the outgoing device 3 is arranged at one end of the engineering fabric 1, the width of the outgoing device 3 is designed according to the width of the engineering fabric 1, the width of a sensing belt is taken as a standard, and the outgoing device is made of high-strength materials such as ABS (acrylonitrile butadiene styrene), stainless steel and the like;
the outgoing line device 3 and the armored sleeve 6 reinforce the outgoing line part of the sensing tape, and the tensile strength and the compressive strength of the optical cable with the exposed sensing tape are improved through the armored sleeve 6;
the sensing belt is coupled with a structure to be tested through epoxy resin impregnating adhesive, distributed monitoring of strain and temperature is achieved, distributed sensing characteristics are achieved, and all points on the sensing belt are sensing points.
As a specific implementation manner, the strain/temperature sensing optical cable 2 includes a micro fixed point strain optical cable, a fully-tight strain optical cable, or a loose-sleeve temperature optical cable, and may be a multi-mode, a single-core, a multi-core, or other optical cables of different types to meet different demodulation technologies and sensing purposes, and the type of the optical cable is flexibly changed according to actual requirements.
As a more specific embodiment, the diameter of the micro fixed point strain cable is 2-3 mm, the micro fixed point strain cable comprises an optical fiber 11, a spiral armor tube 12 and an elastic sheath 13, the optical fiber 11 is located at the center, the optical fiber 11 penetrates through the spiral armor tube 12, the elastic sheath 13 is tightly wrapped outside the spiral armor tube 12, and the optical fiber 11, the spiral armor tube 12 and the elastic sheath 13 are fixed at intervals through a binder. During strain monitoring, the sensing belt and the structure to be measured need to be deformed in coordination, the optical fiber 11 is integrated with the spiral armored pipe 12 and the elastic sheath 13 by the fixing point 14, deformation of the structure to be measured can be sensed by the optical fiber 11 inside the protection device, deformation of the elastic sheath 13 can be driven by deformation of the structure to be measured, and deformation of the elastic sheath 13 can drive deformation of the optical fiber 11 inside the protection device.
As a specific implementation manner, the outlet device 3 includes a plurality of outlet holes 21 and a plurality of mounting holes 22, the outlet device 3 is provided with a sensing belt transition slope 23 for ensuring smooth transition of the strain/temperature sensing optical cable 2, the number and size of the outlet holes 21 are matched with the number and size of the armored sleeves 6 and the number and size of the strain/temperature sensing optical cables 2, the diameter of the outlet holes 21 is matched with the diameter of the armored sleeves 6, the armored sleeves 6 pass through the outlet holes 21 and are fixedly connected with the outlet device 3 through an adhesive, the part of the optical cable penetrating through the engineering fabric 1 passes through the outlet device 3 along the armored sleeves 6, and the mounting holes 22 are used for fixing the outlet device 3 on a structure to be tested and can be welded and fixed through studs.
In a more specific embodiment, two outlet holes 21, two mounting holes 22 and two armor tubes 6 are provided, and two strain/temperature sensing cables 2 are provided, and each cable portion of the strain/temperature sensing cable 2 penetrating through the engineering fabric 1 passes through the outlet device 3 along an adapted one of the armor tubes 6.
A manufacturing method of a novel distributed optical fiber strain/temperature sensing tape comprises the following steps:
the method comprises the steps of processing an engineering fabric 1 into a strip-shaped structure with a certain width, symmetrically overlapping the engineering fabric 1, longitudinally stitching one side of a strain/temperature sensing optical cable 2 to be placed in the engineering fabric 1 to form a lockstitch line 4, placing the strain/temperature sensing optical cable 2 in an interlayer of the engineering fabric 1, stitching two longitudinal sides of the other side of the strain/temperature sensing optical cable 2, and connecting openings of the fabrics through a lockstitch machine. The distributed optical fiber strain/temperature sensing tape is used as a distributed optical fiber strain/temperature sensing tape, is pasted on the surface of the structure to be measured, is synchronously deformed and synchronously changed in temperature with the structure to be measured, and is used for data acquisition through a corresponding demodulator.
Before the distributed optical fiber strain/temperature sensing belt is pasted, firstly polishing to remove protruding particles on a structure to be detected, cleaning surface dust and oil stain, brushing a layer of primer (impregnating adhesive) through a brush, wherein the width of the primer (impregnating adhesive) is larger than the width of the sensing belt by 1-2cm, then laminating and laying the sensing belt along the primer (impregnating adhesive), ensuring that the sensing belt has no protrusion, brushing the impregnating adhesive on the surface of the sensing belt, and monitoring after curing for 24h to reach the strength of the impregnating adhesive.
The utility model discloses the part or the structure that do not specifically describe adopt prior art or current product can, do not do here and describe repeatedly.
The above only is the embodiment of the present invention, not limiting the patent scope of the present invention, all the equivalent structures or equivalent processes that are used in the specification and the attached drawings or directly or indirectly applied to other related technical fields are included in the patent protection scope of the present invention.
Claims (8)
1. A novel distributed optical fiber strain/temperature sensing strip, comprising:
an engineered fabric;
a strain/temperature sensing optical cable;
a wire outlet device;
an armor sleeve;
one or more strain/temperature sensing optical cables are laid on the engineering fabric, the strain/temperature sensing optical cables are attached to the engineering fabric into a whole in a sewing or weaving mode, a wire outlet device is arranged at one end of the engineering fabric, the armored sleeve is fixed on the wire outlet device, and the part, penetrating out of the engineering fabric, of the strain/temperature sensing optical cables penetrates through the wire outlet device along the armored sleeve.
2. The novel distributed fiber optic strain/temperature sensing strip of claim 1, wherein the sensing strip is coupled to the structure to be measured by an impregnating compound to achieve distributed strain/temperature monitoring.
3. The novel distributed fiber optic strain/temperature sensing strip of claim 1, wherein the engineered fabric is in the form of an elongated strip having a width of 3-5 cm.
4. The novel distributed fiber optic strain/temperature sensing strip of claim 1, wherein the engineered fabric is hemmed and formed with a lockstitch line, and the engineered fabric is stitched to form a seam for attaching the strain/temperature sensing cable to the engineered fabric.
5. The novel distributed fiber optic strain/temperature sensing tape of claim 4, wherein the strain/temperature sensing optical cable comprises a micro site strain cable, a fully tight strain cable, or a loose temperature cable.
6. The novel distributed optical fiber strain/temperature sensing belt as claimed in claim 5, wherein the diameter of the micro site strain optical cable is 2-3 mm, the micro site strain optical cable comprises optical fibers, a spiral armor tube and an elastic sheath, the optical fibers are located at the center, the optical fibers are sleeved in the spiral armor tube, the elastic sheath is tightly wrapped outside the spiral armor tube, and the optical fibers, the spiral armor tube and the elastic sheath are fixed at intervals through a binder.
7. The novel distributed optical fiber strain/temperature sensing tape as claimed in claim 1, wherein the outlet device comprises a plurality of outlet holes and mounting holes, the outlet device is provided with a sensing tape transition slope for ensuring smooth transition of the strain/temperature sensing optical cable, the number and size of the outlet holes are matched with those of an armored sleeve and the strain/temperature sensing optical cable, the armored sleeve passes through the outlet holes and is fixed with the outlet device through an adhesive, and the optical cable part of the strain/temperature sensing optical cable, which passes through the engineering fabric, passes through the armored sleeve and passes through the outlet device along the armored sleeve.
8. The novel distributed fiber optic strain/temperature sensing tape of claim 7, wherein there are two exit holes, two mounting holes and two armor tubes, and two strain/temperature sensing cables, wherein the portion of each strain/temperature sensing cable exiting the engineered fabric is routed into one of the armor tubes and along the armor tubes through the exit fixture.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221493035.XU CN217403389U (en) | 2022-06-15 | 2022-06-15 | Novel distributed optical fiber strain/temperature sensing belt |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221493035.XU CN217403389U (en) | 2022-06-15 | 2022-06-15 | Novel distributed optical fiber strain/temperature sensing belt |
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| CN217403389U true CN217403389U (en) | 2022-09-09 |
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| CN202221493035.XU Active CN217403389U (en) | 2022-06-15 | 2022-06-15 | Novel distributed optical fiber strain/temperature sensing belt |
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- 2022-06-15 CN CN202221493035.XU patent/CN217403389U/en active Active
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