CN201724688U - Fiber bragg grating sensor for building and structure healthy detection - Google Patents
Fiber bragg grating sensor for building and structure healthy detection Download PDFInfo
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- CN201724688U CN201724688U CN2010202389242U CN201020238924U CN201724688U CN 201724688 U CN201724688 U CN 201724688U CN 2010202389242 U CN2010202389242 U CN 2010202389242U CN 201020238924 U CN201020238924 U CN 201020238924U CN 201724688 U CN201724688 U CN 201724688U
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Abstract
The utility model discloses a fiber bragg grating sensor for building and structure healthy detection, which comprises optical fiber and grating arranged on the optical fiber, and further comprises FRP ribs and loose tubes which are distributed along the length direction and are fixed in the FRP ribs, wherein optical fiber is distributed in the FRP ribs along the length direction and passes through the loose tubes, the part of the optical fiber, which is positioned outside the loose tube, is fixed in the FRP ribs, and the grating is positioned in the loose tube. The fiber bragg grating sensor of the utility model has larger detection scope, and can be used as a novel structural material to be applied in the civil engineering field.
Description
Technical field
The present invention relates to a kind of buildings, structures health detection device, in particular for the fiber-optic grating sensor of buildings, structures health detection.
Background technology
Fiber-optic grating sensor (being called for short FBG) utilizes optical fiber transmission signal, and itself does not have electricity, has no electromagnetic interference (EMI), can grow the distance monitoring, can work the advantage of long service life in complex environment.Thereby the use face of fiber-optic grating sensor is more and more wider, is subjected to various industry, particularly building, war industry and needs attention antimagnetic, explosion-proof place.
Buildings and structures are carried out health monitoring, particularly using optical fibre grating sensor buildings and structures are carried out health monitoring, more and more become the important means that guarantees urban safety.By health detection, reduce the sudden change of disaster and external force to structural damage, reduce the loss that therefore brings, significant.
Sensor at present commonly used is a bit stressed to certain of buildings and testee, and perhaps the grating wavelength that causes of temperature variation changes and monitors, and obtains the situation of change of testee by the computer (FBG) demodulator.What its reflected is the situation of a point, and the general distance in monitoring point does not have the ability that detects on a large scale in 20cm.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of fiber-optic grating sensor with big sensing range that is used for buildings, structures health detection.
For addressing the above problem, the present invention is used for the fiber-optic grating sensor of buildings, structures health detection, comprise optical fiber and the grating that is arranged on the optical fiber, also comprise the FRP muscle and lay and be fixed on loose sleeve pipe in the FRP muscle along its length, described optical fiber is laid in the FRP muscle along its length and passes loose sleeve pipe, described optical fiber is arranged in loose sleeve pipe partial fixing in addition at the FRP muscle, and described grating is arranged in loose sleeve pipe.
The part that described optical fiber is arranged in beyond the loose sleeve pipe is fixed on the FRP muscle by two fixed sleevings that are arranged on the FRP muscle, and described optical fiber passes and is fixed in the fixed sleeving, and described two fixed sleevings are individually fixed in FRP muscle two ends.
Draw from the end face or the side of FRP muscle at the two ends of described optical fiber.
The derivative two ends of described optical fiber place two armouring protective casings respectively.
The outside surface of described FRP muscle is provided with screw thread and process blasting treatment.
Described loose sleeve pipe is the sleeve pipe that plastics are made.
Described fixed sleeving is the sleeve pipe that metal or plastics are made.
Among the present invention because optical fiber only is fixed in the FRP muscle at two ends, and the optical fiber between two stiff ends owing to be placed in the loose sleeve pipe with the FRP muscle without any contacting, thereby the spacing of detection length of the present invention and two stiff ends is isometric.Thereby the present invention has quite long detection length, has reached the line detection level, and can change detection length by the position of adjusting two stiff ends according to actual needs.Owing to have bigger detection length, the present invention helps the health of large-area buildings and structures is monitored, and can greatly reduce the cost of health monitoring.
In addition, owing to adopt optical fiber built-in in the FRP muscle, the present invention has construction material properties and measuring ability simultaneously, can be used as a kind of new structural material and be applied to field of civil engineering with measuring ability, can be in regular reinforcement be cast in concrete, also can be fixed on the xoncrete structure with anchor clamps, glue or other fastener means in the force part of needs monitoring, make that the stressed of any point all can be reflected on the FRP muscle on vertically fastening structure, thereby draw the stressing conditions at detected position.
Description of drawings
Below in conjunction with drawings and Examples the present invention is carried out further detailed description.
Fig. 1 is the cross-sectional view of fiber-optic grating sensor of the present invention.
Reference numeral is: 1.FRP muscle, 2. optical fiber, 3. loose sleeve pipe, 4. fixed sleeving, 5. armouring protective casing, 6. grating.
Embodiment
As shown in Figure 1, the structure that the present invention is used for the fiber-optic grating sensor of buildings health detection is formed and to be comprised: FRP muscle 1, be carved with the optical fiber 2 of grating 6, loose sleeve pipe 3, fixed sleeving 4, armouring protective casing 5.Pine sleeve pipe 3 is provided with along its length and is solidificated in the FRP muscle 1.Two fixed sleevings 4 also are provided with and are fixed in the FRP muscle 1, and lay respectively at the left and right sides of loose sleeve pipe 3.Optical fiber 2 alongst is laid in the FRP muscle 1, passes the fixed sleeving 4, loose sleeve pipe 3 and another fixed sleeving 4 that are fixed in the FRP muscle 1 successively, and blended rubber water cements on two fixed sleevings 4.The part that optical fiber 2 is arranged in loose sleeve pipe 3 can freely stretch at loose sleeve pipe 3.Grating 6 is arranged in loose sleeve pipe 3.Draw from the end face or the side of FRP muscle 1 at the two ends of optical fiber 2, and as shown in the figure, its left end is drawn from the left side of FRP muscle 1, and its right-hand member is drawn near the side of right-hand member from FRP muscle 1.The derivative two ends of optical fiber 2 place two armouring protective casings 5 respectively.The outside surface of FRP muscle 1 is provided with screw thread and through blasting treatment, with increase FRP muscle 1 with concrete bond stress.Form grating 6 by on optical fiber 2, peelling off fibre cladding at a certain distance.The sleeve pipe that pine sleeve pipe 3 is made for plastics.Fixed sleeving 4 is with plastics or metal, the sleeve pipe of making as stainless steel.
The present invention can make of following method: when processing FRP muscle, to pass two fixed sleevings and loose sleeve pipe and cemented in the optical fiber that is carved with grating in the fixed sleeving by glue, with the fibrous bundle that is impregnated with resin together, carry out stretch-draw through the overtension divider, through the pultrusion die head, organically constitute one and make through heating, curing, cooling step.
Principle of work of the present invention is: the FRP muscle in being applied in buildings or structures is when longitudinal stress, and being fixed in its inner optical fiber can stretch along with the flexible of FRP muscle, causes the respective change of grating, thereby causes the variation of input light wavelength wherein.Utilize the computer (FBG) demodulator to detect light wavelength and change, can realize monitoring, thereby reflect the health status of this buildings or structures this buildings or structures stressing conditions.
Among the present invention, because optical fiber 2 only is fixed in the FRP muscle 1 by two fixed sleevings 4, and the optical fiber between two fixed sleevings 42 be placed in the loose sleeve pipe 3 and with FRP muscle 1 without any contacting, thereby the spacing of detection length of the present invention and two fixed sleevings 4 is isometric.As seen, the present invention has quite long detection length, and can change detection length by the position of adjusting two fixed sleevings 4 according to actual needs.When two fixed sleevings 4 were placed in the two ends, the left and right sides of FRP muscle 1 respectively, detection length of the present invention approached the length of FRP muscle 1, and maximum can reach near 15 meters.Owing to have bigger detection length, the present invention helps large-area buildings and the health of constructing bridge are monitored, and can greatly reduce the cost of health monitoring.
In addition, owing to adopt optical fiber built-in in the FRP muscle, the present invention has construction material properties and measuring ability simultaneously, can be used as a kind of new structural material and be applied to field of civil engineering with measuring ability, can be in regular reinforcement be cast in concrete, also can be fixed on the xoncrete structure with anchor clamps, glue or other fastener means in the force part of needs monitoring, make that the stressed of any point all can be reflected on the FRP muscle on vertically fastening structure, thereby draw the stressing conditions at detected position.
The above is preferred embodiment of the present invention, is not limited to the present invention, all modifications of being done in the present invention spirit and principle, is equal to replacement or improvement etc., all should be included in protection scope of the present invention.
Claims (7)
1. fiber-optic grating sensor that is used for buildings, structures health detection, it is characterized in that, comprise optical fiber (2) and be arranged on grating (6) on the optical fiber (2), also comprise FRP muscle (1) and lay and be fixed on loose sleeve pipe (3) in the FRP muscle (1) along its length, described optical fiber (2) is laid in the FRP muscle (1) along its length and passes loose sleeve pipe (3), described optical fiber (2) is arranged in loose sleeve pipe (3) partial fixing in addition in FRP muscle (1), and described grating (6) is arranged in loose sleeve pipe (3).
2. fiber-optic grating sensor according to claim 1, it is characterized in that, described optical fiber (2) is arranged in loose sleeve pipe (3) part in addition and is fixed on FRP muscle (1) by two fixed sleevings (4) that are arranged on FRP muscle (1), described optical fiber (2) passes and is fixed in the fixed sleeving (4), and described two fixed sleevings (4) are individually fixed in FRP muscle (1) two ends.
3. fiber-optic grating sensor according to claim 2 is characterized in that, draw from the end face or the side of FRP muscle (1) at the two ends of described optical fiber (2).
4. fiber-optic grating sensor according to claim 3 is characterized in that, the derivative two ends of described optical fiber (2) place two armouring protective casings (5) respectively.
5. according to the arbitrary described fiber-optic grating sensor of claim 1 to 4, it is characterized in that the outside surface of described FRP muscle (1) is provided with screw thread and process blasting treatment.
6. according to the arbitrary described fiber-optic grating sensor of claim 1 to 4, it is characterized in that described loose sleeve pipe (3) is the sleeve pipe that plastics are made.
7. according to the arbitrary described fiber-optic grating sensor of claim 1 to 4, it is characterized in that described fixed sleeving (4) is the sleeve pipe that metal or plastics are made.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202389242U CN201724688U (en) | 2010-06-24 | 2010-06-24 | Fiber bragg grating sensor for building and structure healthy detection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202389242U CN201724688U (en) | 2010-06-24 | 2010-06-24 | Fiber bragg grating sensor for building and structure healthy detection |
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| Publication Number | Publication Date |
|---|---|
| CN201724688U true CN201724688U (en) | 2011-01-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2010202389242U Expired - Lifetime CN201724688U (en) | 2010-06-24 | 2010-06-24 | Fiber bragg grating sensor for building and structure healthy detection |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102435551A (en) * | 2011-12-02 | 2012-05-02 | 哈尔滨工业大学 | Building wall humidity fiber grating monitoring system |
| CN102674144A (en) * | 2012-05-24 | 2012-09-19 | 同济大学 | Force-measuring device of hoisting tool of crane based on fiber grating sensor |
| CN103064153A (en) * | 2013-01-24 | 2013-04-24 | 四川汇源光通信有限公司 | Well logging sensor connection packaging device suitable for temperature of 300 DEG C and pressure of 50MPa |
| CN103307995A (en) * | 2013-06-27 | 2013-09-18 | 石家庄铁道大学 | Bidirectional long-gauge-length fiber grating strain sensor |
| CN104048616A (en) * | 2014-06-30 | 2014-09-17 | 中国一冶集团有限公司 | Distributed optical fiber used for detecting concrete strain |
| CN105332338B (en) * | 2015-11-25 | 2016-09-14 | 苏州大学 | A kind of concrete column utilizing self-sensing FRP muscle to reinforce |
| CN106121134A (en) * | 2016-08-29 | 2016-11-16 | 智性纤维复合加固南通有限公司 | A kind of optical fiber built-in FRP muscle leading-out wire protective structure and preparation method thereof |
-
2010
- 2010-06-24 CN CN2010202389242U patent/CN201724688U/en not_active Expired - Lifetime
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102435551A (en) * | 2011-12-02 | 2012-05-02 | 哈尔滨工业大学 | Building wall humidity fiber grating monitoring system |
| CN102674144A (en) * | 2012-05-24 | 2012-09-19 | 同济大学 | Force-measuring device of hoisting tool of crane based on fiber grating sensor |
| CN103064153A (en) * | 2013-01-24 | 2013-04-24 | 四川汇源光通信有限公司 | Well logging sensor connection packaging device suitable for temperature of 300 DEG C and pressure of 50MPa |
| CN103307995A (en) * | 2013-06-27 | 2013-09-18 | 石家庄铁道大学 | Bidirectional long-gauge-length fiber grating strain sensor |
| CN104048616A (en) * | 2014-06-30 | 2014-09-17 | 中国一冶集团有限公司 | Distributed optical fiber used for detecting concrete strain |
| CN105332338B (en) * | 2015-11-25 | 2016-09-14 | 苏州大学 | A kind of concrete column utilizing self-sensing FRP muscle to reinforce |
| CN106121134A (en) * | 2016-08-29 | 2016-11-16 | 智性纤维复合加固南通有限公司 | A kind of optical fiber built-in FRP muscle leading-out wire protective structure and preparation method thereof |
| CN106121134B (en) * | 2016-08-29 | 2019-03-05 | 智性纤维复合加固南通有限公司 | A kind of optical fiber built-in FRP tendons leading-out wire protective structure and preparation method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Shenzhen Oceanpower New Material Technology Co., Ltd. Assignor: Shenzhen Oceanpower industry Limited by Share Ltd|Shanghai Qipeng engineering Mstar Technology Ltd Contract record no.: 2012440020067 Denomination of utility model: Fiber bragg grating sensor for building and structure healthy detection Granted publication date: 20110126 License type: Exclusive License Record date: 20120418 Assignee: Shenzhen Oceanpower New Material Technology Co., Ltd. Assignor: Shenzhen Oceanpower industry Limited by Share Ltd|Shanghai Qipeng engineering Mstar Technology Ltd Contract record no.: 2012440020067 Denomination of utility model: Fiber bragg grating sensor for building and structure healthy detection Granted publication date: 20110126 License type: Exclusive License Record date: 20120418 |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110126 |