CN201364405Y - Microstrip strain sensing optical cable - Google Patents
Microstrip strain sensing optical cable Download PDFInfo
- Publication number
- CN201364405Y CN201364405Y CNU2009200422188U CN200920042218U CN201364405Y CN 201364405 Y CN201364405 Y CN 201364405Y CN U2009200422188 U CNU2009200422188 U CN U2009200422188U CN 200920042218 U CN200920042218 U CN 200920042218U CN 201364405 Y CN201364405 Y CN 201364405Y
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- optical cable
- sensing optical
- mode fiber
- cable
- strain
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Abstract
The utility model belongs to the sensing optical cable field, in particular relates to a microstrip strain sensing optical cable suitable for a BOTDR distributed sensing system. The cable is provided with single-mode fibers which are coated by a polyimide coating layer and are tightly laid in an optical cable sheath integrally pressed by polyphenyl thioether plastic sheets reinforced through upper glass fiber and lower glass fiber. The optical cable has high strain sensitivity, high intensity and good flame retardant and wear resistant properties, the structural size is small, the cable is easy to install and has little possibility of damage, and can be widely applied on the occasions where bridges, dams, oil-gas pipelines, tunnels, warehouses, power lines and other facilities are provided and security monitoring is required.
Description
Technical field
The utility model relates to a kind of sensing optic cable, especially is applicable to a kind of microtrip straining sensing optical cable in the BOTDR distributed sensing system.
Background technology
In recent years, utilize the distributed optical fiber sensing system of optical time domain reflection technology to obtain development rapidly. particularly utilize the susceptibility of Brillouin scattering to strain, the BOTDR of formation is that Brillouin OTDR Brillouin scattering distribution type fiber-optic detects sensor-based system.The Brillouin scattering that is sent by BOTDR feeds when transmitting in the single-mode fiber, and when single-mode fiber is subjected to stress and when producing strain, the Brillouin scattering in the optical fiber will produce frequency displacement, the calculating by frequency displacement can draw the suffered strain numerical value of optical fiber.It is 0.002% that the strain precision that BOTDR distributive fiber optic strain and sensing measurement system are measured can reach 20 μ ε, and measuring distance reaches 30Km, is the distribution type fiber-optic measuring system that precision is the highest in the world at present.
In traditional communications optical cable, optical cable must be designed to optical fiber in the optical cable and extraneous stress isolated, that is to say that optical fiber should not influenced by external force directly, to guarantee the long-term serviceable life of optical cable.And in straining sensing optical cable, must allow extraneous stress be directly delivered on the optical fiber in the optical cable, thereby realize strain measurement.Be optical fiber and the necessary fluid-tight engagement of sheath in the cable configuration, but domestic technique is just at the early-stage at present, can't produce the straining sensing optical cable of this kind structure, guarantee to have high sensitivity and high-intensity effect, to be used for the distribution type fiber-optic measuring system as strain sensor.
The utility model content
The technical problems to be solved in the utility model is: in order to solve the problems of the technologies described above, a kind of microtrip straining sensing optical cable is provided, it is highly sensitive, intensity good, can be used in the security monitoring occasion of facilities such as bridge, dam, oil and gas pipes, tunnel, warehouse and power circuit.
The technical scheme that its technical matters that solves the utility model adopts is: a kind of microtrip straining sensing optical cable, has single-mode fiber, single-mode fiber coats polyimide coating outward, and the polyphenylene sulfide plastic sheet that closely is laid in by two glass fibre enhancings up and down is compressed in the optical cable protective layer of one.
Described single-mode fiber quantity is 1～6, and the single-mode fiber diameter is 0.125mm.
Described polyimide coating diameter is 0.155mm.
The beneficial effects of the utility model are: the single-mode fiber of this optical cable closely is laid in the optical cable protective layer, and promptly single-mode fiber closely contacts with optical cable protective layer, and strain sensitivity is very high; The polyphenylene sulfide plastic that optical cable protective layer adopts glass fibre to strengthen is made, and it is good to have improved the intensity of optical cable and fire resistance and wear-corrosion resistance greatly; And physical dimension is little, is easy to install, and is widely used in the occasions such as security monitoring of facilities such as bridge, dam, oil and gas pipes, tunnel, warehouse and power circuit.
Description of drawings
Below in conjunction with drawings and Examples the utility model is further specified.
Fig. 1 is a structural representation of the present utility model.
Wherein: 1. single-mode fiber, 2. polyimide coating, 3. optical cable protective layer.
Embodiment
As shown in Figure 1, a kind of microtrip straining sensing optical cable has single-mode fiber 1, the single-mode fiber 1 outer polyimide coating 2 that coats, and the polyphenylene sulfide plastic sheet that closely is laid in by two glass fibre enhancings up and down is compressed in the optical cable protective layer 3 of one.
This microtrip straining sensing optical cable is small-sized, and single-mode fiber 1 diameter is 0.125mm, and the polyimide coating diameter is 0.155mm, and the thickness of microtrip straining sensing optical cable is 0.4mm, and single-mode fiber 1 quantity can be 1～6.When single-mode fiber 1 quantity is 4, see Fig. 1, this moment, the width of this microtrip straining sensing optical cable was 2～3mm.Because this microtrip straining sensing optical cable physical dimension is very little, can directly be embedded into the civil structure spare inside in detected strain and distortion during use, or directly be bonded in its surface.
In this microtrip straining sensing optical cable, polyimide fibre coating 2 is that a kind of heatproof reaches 300 ℃ high temperature fibre coating.Optical cable protective layer 3 is the polyphenylene sulfide plastic that glass fibre strengthens, polyphenylene sulfide is that a kind of heatproof reaches 240 ℃ thermoplastics, after strengthening with glass fibre, having good difficulty combustion, wear-resisting, resistance to chemical corrosion and superior physical and mechanical properties, is a kind of high-quality engineering plastics.Single-mode fiber 1 is integral by the polyphenylene sulfide plastic sheet enrobed compacted of two glass fibre enhancings up and down in its structure, be single-mode fiber 1 and optical cable protective layer 3 fluid-tight engagement, the strain that optical cable is subjected to is directly delivered on this single-mode fiber 1, so optical fiber 1 is to use as strain sensor.Single-mode fiber 1 can be because of little curved optical loss that causes in cable configuration, but its intensity is good, loss is not very big, and this optical cable is a sensing optic cable, it is the strain of measuring optical fiber, can not influence the measurement of fibre strain because of loss, as long as the dynamic range of BOTDR is enough big, the measuring distance of this sensor-based system will be very long.
Claims (3)
1. microtrip straining sensing optical cable, have single-mode fiber (1) and optical cable protective layer, it is characterized in that: the outer polyimide coating (2) that coats of single-mode fiber (1), and the polyphenylene sulfide plastic sheet that closely is laid in by two glass fibre enhancings up and down is compressed in the optical cable protective layer (3) of one.
2. microtrip straining sensing optical cable according to claim 1 is characterized in that: described single-mode fiber (1) quantity is 1～6, and single-mode fiber (1) diameter is 0.125mm.
3. microtrip straining sensing optical cable according to claim 1 is characterized in that: described polyimide coating (2) diameter is 0.155mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2009200422188U CN201364405Y (en) | 2009-03-19 | 2009-03-19 | Microstrip strain sensing optical cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2009200422188U CN201364405Y (en) | 2009-03-19 | 2009-03-19 | Microstrip strain sensing optical cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201364405Y true CN201364405Y (en) | 2009-12-16 |
Family
ID=41475073
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2009200422188U Expired - Lifetime CN201364405Y (en) | 2009-03-19 | 2009-03-19 | Microstrip strain sensing optical cable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201364405Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105758326A (en) * | 2016-05-05 | 2016-07-13 | 智性纤维复合加固南通有限公司 | Distributed optical fiber ribbon for deformation monitoring and preparation method thereof |
| US9557232B2 (en) | 2013-05-10 | 2017-01-31 | Corning Optical Communications LLC | Structural strain sensing optical cable |
-
2009
- 2009-03-19 CN CNU2009200422188U patent/CN201364405Y/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9557232B2 (en) | 2013-05-10 | 2017-01-31 | Corning Optical Communications LLC | Structural strain sensing optical cable |
| CN105758326A (en) * | 2016-05-05 | 2016-07-13 | 智性纤维复合加固南通有限公司 | Distributed optical fiber ribbon for deformation monitoring and preparation method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20100827 Address after: 213104 Cen Cun road, Luoyang Town, Wujin District, Changzhou Patentee after: Jiangsu Nanfang Communications Technology Co., Ltd. Address before: 213104 Cen Cun road, Luoyang Town, Wujin District, Jiangsu, Changzhou Patentee before: Changzhou Southern Communication Technology Co., Ltd. |
|
| CX01 | Expiry of patent term |
Granted publication date: 20091216 |
|
| CX01 | Expiry of patent term |