CN207163414U - The embed-type fiber-optic grating sensor of concrete - Google Patents
The embed-type fiber-optic grating sensor of concrete Download PDFInfo
- Publication number
- CN207163414U CN207163414U CN201721193314.3U CN201721193314U CN207163414U CN 207163414 U CN207163414 U CN 207163414U CN 201721193314 U CN201721193314 U CN 201721193314U CN 207163414 U CN207163414 U CN 207163414U
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- China
- Prior art keywords
- bearing
- grating
- concrete
- steel pipe
- fiber
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Abstract
The utility model discloses a kind of embed-type fiber-optic grating sensor of concrete, it is overall I-shaped in sidewards, including fiber grating and bearing, bonding elasticity layer outside the fiber grating, the elastic layer is tubulose, the outer enclosure of the elastic layer has steel pipe, the both ends of the steel pipe are laid with compact property bearing, the bearing is circle, bearing is welded as a whole with elastic layer, space is reserved between the bearing and steel pipe, the width in the space is 2 3mm, the space is filled using flexible material, and the flexible material is rubber.The strain that the utility model is simple in construction, cost is low, high sensitivity, anti-interference are good, can be to concrete under sealing state is accurately measured.
Description
Technical field
It the utility model is related to sensor technical field, more particularly to the embed-type fiber-optic grating sensor of concrete.
Background technology
With the high speed development of sensor technology, sensor application is in all trades and professions, various fields, in concrete structure
Safety monitoring in also widely applied, that tests under air-proof condition concrete using traditional strain transducer should
Become, including elastic strain and plastic strain, but traditional strain transducer precision is low, interference free performance is poor, structural shape is limited；
Fiber-optic grating sensor is also used at present in concrete strain detection, but the range of fiber-optic grating sensor is generally coagulation
The limiting strain of soil（About ± 3000 μ ε）, and the concrete under sealing condition is in multi-dimensional stress state, its limiting strain is long-range
The limiting strain of concrete under free condition, influences the analysis of structural nonlinear finite element, so as to influence the construction of concrete
Quality and safety；Therefore, to solve the above problems, needing a embed-type fiber-optic grating sensor of concrete of design badly.
Utility model content
The utility model is in view of the shortcomings of the prior art and defect, there is provided a kind of embed-type fiber grating of concrete passes
Sensor, realize the high-acruracy survey to concrete strain.
To achieve the above object, technical scheme is used by the utility model：A kind of embed-type fiber grating of concrete
Sensor, overall I-shaped in sidewards, including fiber grating and bearing, bonding elasticity layer outside the fiber grating, institute
It is tubulose to state elastic layer, and the outer enclosure of the elastic layer has steel pipe, and the both ends of the steel pipe are laid with compact property bearing, described
Bearing is circle, and bearing is welded as a whole with elastic layer, and space, the width in the space are reserved between the bearing and steel pipe
For 2-3mm, the space is filled using flexible material, and the flexible material is rubber.
Further, the fiber grating includes optical fiber and grating, and the optical fiber and grating are laid and is integrated, the grating
The centre position of inside of optical fibre hair is laid in, grating is distributed by spaced horizontal of screen periods.
Further, the steel duct is laid with desensitization structure, and the desensitization structure is that cloth is set to vacuum in steel pipe
Structure.
Further, the both sides of the bearing are laid with extraction optical fiber.
The beneficial effects of the utility model are：
1. the embed-type fiber-optic grating sensor of the utility model concrete is welded as a whole using bearing with elastic layer,
Bearing amplifies on the basis of steel pipe is encapsulated, and ensure that anchoring good between concrete coagulation hardening rear support and concrete
Performance, sensor and concrete cooperative transformation, big to the measurement range of the strain detecting of concrete during reaching structure stress.
2. the embed-type fiber-optic grating sensor of the utility model concrete uses desensitization structure by encapsulating steel duct, i.e.,
Encapsulation steel duct cloth is set to vacuum, avoids because the presence of air dielectric and the change of internal and external temperature influence the test of fiber grating
Precision, while improve the interference free performance of sensor.
3. the embed-type fiber-optic grating sensor of the utility model concrete is simple in construction, cost is low, high sensitivity, anti-interference
Good, can be to concrete under sealing state the strain of property is accurately measured.
Brief description of the drawings
Fig. 1 is the structural representation of the embed-type fiber-optic grating sensor of the utility model concrete.
Fig. 2 is the optical fiber grating structure schematic diagram of the embed-type fiber-optic grating sensor of the utility model concrete.
In figure marked as：1 is bearing, and 2 is draw optical fiber, and 3 be elastic layer, and 4 be grating, and 5 be steel pipe, and 6 be space, and 7 are
Optical fiber.
Embodiment
Below in conjunction with the accompanying drawings and embodiment is described in further detail to the utility model：
As shown in Fig. 1 ~ Fig. 2, a kind of embed-type fiber-optic grating sensor of concrete is overall I-shaped in sidewards, including
Fiber grating and bearing 1, the fiber grating include optical fiber 7 and grating 4, and the optical fiber 7 and grating 4 are laid and is integrated, described
Grating 4 is laid in the centre position of the inside of optical fiber 7 hair, and grating 4 is distributed by spaced horizontal of screen periods；It is viscous outside fiber grating
Elastic layer 3 is connected to, the elastic layer 3 is tubulose, and the outer enclosure of the elastic layer 3 has steel pipe 5, and the inside of steel pipe 5 is laid
There is desensitization structure, the desensitization structure is that cloth is set to vacuum structure in steel pipe 5；The both ends of the steel pipe 5 are laid with compact property
Bearing 1, the bearing 1 are circle, and bearing 1 is welded as a whole with elastic layer 3, and space is reserved between the bearing 1 and steel pipe 5
6, the width in the space 6 is 2-3mm, and the space 6 is filled using flexible material, and the flexible material is rubber；The branch
The both sides of seat, which are laid with, draws optical fiber 2.
In use, fiber-optic grating sensor is embedded in concrete, optical fiber 2 and extraneous prison are drawn in the both sides of bearing 1
Survey machine is connected, the signal sent out with reception optical fiber grating sensor；After concrete coagulation hardening, bearing 1 and concrete
Anchoring that can be firm is together；When residing structure stress, and the concrete under sealing condition is in multiaxial stress shape
State, and due to being reserved with space 6 between design bearing 1 and steel pipe 5, and space 6 is filled using flexible material, therefore fiber grating
Sensor can reach with coagulation earth cooperation deformation, more stress states can be born；Fiber-optic grating sensor is by drawing optical fiber 2
Strain signal in concrete sensor is reached to the monitoring machine in the external world, so as to reach the detection to concrete strain.
Embodiment described above, simply preferred embodiment of the present utility model, is not limited of the present utility model
Practical range, therefore the equivalent change or modification that all construction, feature and principles according to described in the utility model patent scope are done,
It should be included in present utility model application the scope of the claims.
Claims (4)
- A kind of 1. embed-type fiber-optic grating sensor of concrete, it is characterised in that it is overall I-shaped in sidewards, including optical fiber light Grid and bearing（1）, the fiber grating outside bonding elasticity layer（3）, the elastic layer（3）For tubulose, the elastic layer（3） Outer enclosure have steel pipe（5）, the steel pipe（5）Both ends be laid with compact property bearing（1）, the bearing（1）For circle, branch Seat（1）With elastic layer（3）It is welded as a whole, the bearing（1）Space is reserved between steel pipe（6）, the space（6）Width Spend for 2-3mm, the space（6）Filled using flexible material, the flexible material is rubber.
- 2. the embed-type fiber-optic grating sensor of concrete according to claim 1, it is characterised in that the fiber grating bag Include optical fiber（7）And grating（4）, the optical fiber（7）And grating（4）Laying is integrated, the grating（4）It is laid in optical fiber（7）It is interior The centre position of portion's hair, grating（4）It is distributed by spaced horizontal of screen periods.
- 3. the embed-type fiber-optic grating sensor of concrete according to claim 1, it is characterised in that the steel pipe（5）It is interior Portion is laid with desensitization structure, and the desensitization structure is in steel pipe（5）Interior cloth is set to vacuum structure.
- 4. the embed-type fiber-optic grating sensor of concrete according to claim 1, it is characterised in that the bearing（1）'s Both sides are laid with extraction optical fiber（2）.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721193314.3U CN207163414U (en) | 2017-09-18 | 2017-09-18 | The embed-type fiber-optic grating sensor of concrete |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721193314.3U CN207163414U (en) | 2017-09-18 | 2017-09-18 | The embed-type fiber-optic grating sensor of concrete |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207163414U true CN207163414U (en) | 2018-03-30 |
Family
ID=61722115
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721193314.3U Expired - Fee Related CN207163414U (en) | 2017-09-18 | 2017-09-18 | The embed-type fiber-optic grating sensor of concrete |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207163414U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110836014A (en) * | 2019-11-09 | 2020-02-25 | 上海建工集团股份有限公司 | Device for safely laying fiber bragg grating sensors and construction method |
| CN111846130A (en) * | 2020-07-30 | 2020-10-30 | 广东精铟海洋工程股份有限公司 | Tower structure of ocean floating tower |
-
2017
- 2017-09-18 CN CN201721193314.3U patent/CN207163414U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110836014A (en) * | 2019-11-09 | 2020-02-25 | 上海建工集团股份有限公司 | Device for safely laying fiber bragg grating sensors and construction method |
| CN111846130A (en) * | 2020-07-30 | 2020-10-30 | 广东精铟海洋工程股份有限公司 | Tower structure of ocean floating tower |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180330 Termination date: 20190918 |