CN209961239U - Internal structure of distributed fiber grating vibration sensor - Google Patents
Internal structure of distributed fiber grating vibration sensor Download PDFInfo
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- CN209961239U CN209961239U CN201920894772.2U CN201920894772U CN209961239U CN 209961239 U CN209961239 U CN 209961239U CN 201920894772 U CN201920894772 U CN 201920894772U CN 209961239 U CN209961239 U CN 209961239U
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Abstract
The utility model discloses a distributing type fiber grating vibration sensor's inner structure, including protective sheath, reinforcement core and optic fibre are installed in the protective sheath, and the reinforcement core is three to be equipped with in the outer disc of reinforcement core and be curved recess, the recess sets up along the length direction of reinforcement core, and the center of three reinforcement cores is equilateral triangle setting, and makes the recess towards the central direction of protective sheath, and optic fibre is equipped with loose sleeve pipe outward, loose sheathed tube outer fringe face and recess adaptation. The utility model discloses a distributing type fiber grating vibration sensor's inner structure through the effect that adopts protective sheath and reinforcement core, can realize reducing the vibration to the signal transmission influence of optic fibre, adopts the reinforcement core to be triangle-shaped setting simultaneously, utilizes the recess and the loose tube adaptation of reinforcement core, realizes the fixed to optic fibre to the effect that utilizes the reinforcement core can reduce the influence of external vibration to optic fibre.
Description
Technical Field
The utility model relates to a distributed optical fiber sensing detects technical field, more specifically relates to a distributed fiber grating vibration sensor's inner structure.
Background
A distributed fiber grating vibration sensing system based on Mach-Zehnder interference and optical time domain reflection technology utilizes optical fibers between gratings as a sensing unit, and realizes distributed vibration monitoring of the whole optical fiber by detecting interference signals between two adjacent gratings in a weak fiber grating array. The space positioning of the area to be measured can be accurately realized through the fiber grating array with fixed spacing and the continuous distribution of the optical fibers.
The optical fiber sensor has the characteristics of electromagnetic interference resistance, good electrical insulation performance, corrosion resistance, small transmission loss and the like. Therefore, the fiber grating sensing technology is suitable for being applied to a plurality of severe environments, but because the optical fiber is fine, flexible and easy to damage, a plurality of packaging methods are needed to protect the grating. And in some occasions with higher measurement accuracy requirements, the sensor needs to be packaged to improve the sensitivity. At present, because the outer diameter of an optical fiber is very thin (the outer diameter of a coating layer is about 250 micrometers), the vibration signal of an object to be detected cannot be effectively transmitted, the deformation of the optical fiber caused by vibration is very small, and the amplitude of the signal demodulated by a phase is very weak.
Based on the above-mentioned influence, the internal structure of the distributed fiber grating vibration sensor of the present application has been designed.
SUMMERY OF THE UTILITY MODEL
The utility model provides a simple structure, good, the distributed fiber grating vibration sensor's that can eliminate stress influence inner structure of durability to the fiber grating array that current distributed fiber grating vibration sensing system adopted on the solution is at the technical problem on the actual engineering application.
According to the utility model discloses an aspect provides a distributed fiber grating vibration sensor's inner structure, including protective sheath, reinforced core and optic fibre, reinforced core with optic fibre is installed in the protective sheath, just reinforced core is three, and reinforced core's outer disc is equipped with and is curved recess, the recess along reinforced core's length direction sets up, and three reinforced core's center is equilateral triangle and sets up, and makes the recess orientation the center direction of protective sheath, optic fibre is equipped with loose sleeve pipe outward, loose sheathed tube outer fringe face with the recess adaptation.
On the basis of the scheme, the loose tube is preferably a polypropylene tube, and an elastic reinforcing wire is embedded in the polypropylene tube.
On the basis of the scheme, ointment is preferably filled in the loose tube.
On the basis of the scheme, the reinforced core is preferably an elastic high-temperature-resistant rubber pipeline, and a steel core is arranged in the elastic high-temperature-resistant intersecting pipeline.
Preferably, on the basis of the scheme, the protective sleeve is made of low-smoke halogen-free polyolefin material.
Preferably, on the basis of the above scheme, a filler is disposed in the protective sheath and in a gap between the reinforcing core and the optical fiber.
On the basis of the scheme, the filler is preferably an inorganic mineral rope.
The utility model discloses a distributing type fiber grating vibration sensor's inner structure through the effect that adopts protective sheath and reinforcement core, can realize reducing the vibration to the signal transmission influence of optic fibre, adopts the reinforcement core to be triangle-shaped setting simultaneously, utilizes the recess and the loose tube adaptation of reinforcement core, realizes the fixed to optic fibre to the effect that utilizes the reinforcement core can reduce the influence of external vibration to optic fibre.
Drawings
Fig. 1 is a block diagram of the high voltage cabinet with a safety device according to the present invention;
fig. 2 is a circuit diagram of the microprocessor and the wireless transceiver according to the present invention.
Detailed Description
The following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.
Please refer to fig. 1, the utility model provides an inner structure of distributed fiber grating vibration sensor, including protective sheath 10, reinforcement core 20 and optic fibre 30, wherein, reinforcement core 20 and optic fibre 30 are installed in protective sheath 10, the utility model discloses reinforcement core 20 that sets up in protective sheath 10 is three to be equipped with at the excircle face of reinforcement core 20 and be curved recess 21, recess 21 sets up along the length direction of reinforcement core 20, and the center of three reinforcement cores 20 is equilateral triangle and sets up, and makes recess 21 set up towards the central axis direction of protective sheath 10, and optic fibre 30 is equipped with loose sleeve pipe 31 outward, loose sleeve pipe 31's outer fringe face and recess 21 adaptation.
The during operation utilizes the formation triangle location relation of three reinforced cores 20, and cooperation recess 21, with the realization is tight to the location and the clamp of the pine sleeve 31 that is used for installing and protecting optic fibre 30, works as the utility model discloses a distributed fiber grating vibration sensor's inner structure when receiving external effort, can pass through protective sheath 10 on the one hand, reinforced core 20 and pine sleeve 31 reduce external effort, avoid optic fibre 30 impaired, simultaneously, when receiving external tensile effort, because optic fibre 30 is in the central point of protective sheath 10 puts, consequently, no matter be when it receives the effort of any direction, all can be through the structure between optic fibre 30 outside and protective sheath 10, reduce the effort to optic fibre 30, guarantee that optic fibre 30 is not impaired.
It should be noted that the loose tube 31 of the present invention is a polypropylene tube, and an elastic reinforcing wire is embedded in the polypropylene tube. When the utility model discloses a distributed fiber grating vibration sensor's inner structure receives external tensile effort, can reduce the tensile effect to optic fibre 30 through the flexible effort of polyethylene pipe to adopt the elasticity enhancement silk, further reduce its tensile effort. Preferably, ointment is filled in the loose tube 31.
The utility model discloses a strengthen core 20 is the high temperature resistant rubber pipeline of elasticity, and the crossing pipeline of elasticity high temperature resistant embeds steel core 22. Through the high temperature resistant rubber pipeline of elasticity, can realize the buffering to external effort, the effort of cooperation steel core 22 improves its intensity.
Preferably, the protective sheath 10 of the present invention is made of low smoke halogen-free polyolefin.
The utility model discloses still in the protective sheath 10 with strengthen the core 20 and the clearance between the optic fibre 30 is equipped with the stopping. Wherein the filler is inorganic mineral rope. The influence of the external vibration force on the optical fiber 30 can be further reduced by the action of the filler.
The utility model discloses a distributing type fiber grating vibration sensor's inner structure, through the effect that adopts protective sheath 10 and reinforcement core 20, can realize the protection to optic fibre 30, reduce the vibration and influence the signal transmission of optic fibre 30, adopt reinforcement core 20 to be triangle-shaped setting simultaneously, utilize the recess 21 and the loose tube 31 adaptation of reinforcement core 20, realize the fixed to optic fibre 30 to utilize the effect of reinforcement core 20 can reduce the influence of external vibration to optic fibre 30.
Finally, the method of the present application is only a preferred embodiment and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. The utility model provides a distributing type fiber grating vibration sensor's inner structure, its characterized in that, includes protective sheath, reinforced core and optic fibre, reinforced core with optic fibre is installed in the protective sheath, just reinforced core is three, and reinforced core's outer disc is equipped with and is curved recess, the recess along reinforced core's length direction sets up, and three reinforced core's center is equilateral triangle and sets up, and makes the recess orientation the center direction of protective sheath, optic fibre is equipped with loose sleeve pipe outward, loose sheathed tube outer fringe face with the recess adaptation.
2. The internal structure of a distributed fiber grating vibration sensor as in claim 1, wherein said loose tube is a polypropylene tube with elastic reinforcing wires embedded therein.
3. The internal structure of a distributed fiber grating vibration sensor as in claim 2, wherein said loose tube is filled with ointment.
4. The internal structure of a distributed fiber grating vibration sensor according to claim 1, wherein the reinforcing core is an elastic high temperature resistant rubber pipeline, and a steel core is embedded in the elastic high temperature resistant intersecting pipeline.
5. The internal structure of a distributed fiber grating vibration sensor according to claim 1, wherein said protective sheath is made of a low smoke zero halogen polyolefin material.
6. The distributed fiber grating vibration sensor as in claim 5, wherein a gap in said protective jacket between said core and said fiber is filled with a filler material.
7. The internal structure of a distributed fiber grating vibration sensor as in claim 6, wherein said filler is inorganic mineral rope.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920894772.2U CN209961239U (en) | 2019-06-14 | 2019-06-14 | Internal structure of distributed fiber grating vibration sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920894772.2U CN209961239U (en) | 2019-06-14 | 2019-06-14 | Internal structure of distributed fiber grating vibration sensor |
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| Publication Number | Publication Date |
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| CN209961239U true CN209961239U (en) | 2020-01-17 |
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| CN201920894772.2U Active CN209961239U (en) | 2019-06-14 | 2019-06-14 | Internal structure of distributed fiber grating vibration sensor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111399145A (en) * | 2020-04-27 | 2020-07-10 | 江苏亨通线缆科技有限公司 | Reinforced optical cable |
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2019
- 2019-06-14 CN CN201920894772.2U patent/CN209961239U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111399145A (en) * | 2020-04-27 | 2020-07-10 | 江苏亨通线缆科技有限公司 | Reinforced optical cable |
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