CN101694372A - Intelligent cable fiber grating strain sensor - Google Patents
Intelligent cable fiber grating strain sensor Download PDFInfo
- Publication number
- CN101694372A CN101694372A CN200910145153A CN200910145153A CN101694372A CN 101694372 A CN101694372 A CN 101694372A CN 200910145153 A CN200910145153 A CN 200910145153A CN 200910145153 A CN200910145153 A CN 200910145153A CN 101694372 A CN101694372 A CN 101694372A
- Authority
- CN
- China
- Prior art keywords
- steel pipe
- fiber grating
- cable
- steel
- pipes
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Landscapes
- Optical Transform (AREA)
Abstract
The invention relates to an intelligent cable fiber grating strain sensor which is suitable for cable bearing structures including a cable stayed bridge, a suspension bridge, an arch bridge and the like. The intelligent cable fiber grating strain sensor comprises a fiber grating (1), two first steel pipes (3), two second steel pipes (2), a protecting steel pipe (6) and a supporting base (4), wherein the diameter of each first steel pipe (3) is larger than that of each second steel pipe (2) and is smaller than that of the protecting steel pipe (6), the middle of each first steel pipe (3) penetrates through a through hole in the upper region of the supporting base (4) and is then connected with the supporting base (4), both ends of the protecting steel pipe (6) are respectively sleeved at one end of each first steel pipe (3), the other end of each first steel pipe (3) is sleeved at one end of each second steel pipe (2), the fiber grating (1) penetrates through the second steel pipes (2), the first steel pipes (3) and the protecting steel pipe (6), a grating region is positioned at the central position of the protecting steel pipe (6), and tail optical fibers at both ends of the fiber grating (1) are led out from the other end of each second steel pipe (2). The invention can improve the survival rates of fiber grating sensors and optical fibers in the process of cable manufacture and application and ensure that the fiber grating can stably work under the large stress condition of cables.
Description
(1) technical field
What the present invention relates to is a kind of built-in cable fiber grating strain sensor applicable to cable load-carrying members such as cable-stayed bridge, suspension bridge, arch bridges.
(2) background technology
The cable system is the core supporting member of bridge structures such as modern large span stayed-cable bridge, suspension bridge.Dynamic load on the deadweight of long-span bridge girder construction and the bridge, the overwhelming majority are to be delivered on the king-post by funicular system, and the duty of cable is directly to reflect one of important symbol whether bridge is in a safe condition.But owing to reasons such as structure design, environmental corrosion, fatigue accumulations, damage and deterioration in various degree appears in cable in-service unavoidably, estimates the stress of bridge cable system, and the use and the security that can be bridge cable provide decision-making foundation.What present Suo Li to cable generally adopted is the mode of external prison, if sensor organically can be integrated into cable inside, make its cable rise to intelligent cable with automatic perception from a simple load, also realize taking into account the possibility of the whole stressed of cable and the stressed monitoring of local silk simultaneously, to more help structural safety and the operation state that people grasp cable self and full-bridge, the tendency of discovery accident in time, prevent that sudden accident from taking place.
Fiber grating is a kind of sensitive element of function admirable, can respond to extraneous small strain variation by moving of bragg reflection wavelength and realize the structural stress on-line monitoring.It has the rugged surroundings of not being afraid of, be not subjected to ambient noise interference, anti-electromagnetic interference (EMI), collection sensing be transmitted in characteristics such as one, simple structure, easy to use, measuring accuracy height.
But the fiber grating without special processing is very fragile, directly is arranged in the cable, and is destroyed easily.Fiber grating is combined with cable, relate to how fiber grating is encapsulated raising fiber-optic grating sensor and the survival rate of optical fiber in cable manufacturing and application process with which kind of packing forms; How to guarantee that fiber grating can stably be operated under the big stress state of cable.
(3) summary of the invention
The objective of the invention is to overcome above-mentioned deficiency, provide a kind of and can improve survival rate in cable manufacturing and application process of fiber-optic grating sensor and optical fiber, guarantee that fiber grating can stably be operated in the intelligent cable fiber grating strain sensor under the big stress state of cable.
The object of the present invention is achieved like this: a kind of intelligent cable fiber grating strain sensor; comprise fiber grating; first steel pipe; second steel pipe; protection steel pipe and bearing; described protection steel pipe has one; first steel pipe; the bearing and second steel pipe all have two; two first steel pipes; two bearings and two second steel pipes are symmetrically arranged in the right and left of described protection steel pipe; the diameter of the diameter of the diameter of second steel pipe＜first steel pipe＜protection steel pipe wherein; axially grooved in the middle of described second steel pipe; the perforation of bearing upper area; passing described bearing upper area perforation in the middle of first steel pipe is connected on the bearing; the two ends of protection steel pipe are set in an end of described two first steel pipes; the other end of first steel pipe is sleeved on an end of described second steel pipe; fiber grating passes second steel pipe; first steel pipe and protection steel pipe; the grating grid region is in protection steel pipe center; the fiber grating two ends are fixed in the groove of described two second steel pipes with glue; the second steel pipe fluting place overcoat thermal shrinkable sleeve, described fiber grating two ends tail optical fiber is drawn by the other end of described two second steel pipes.
The invention has the beneficial effects as follows:
The present invention is connected with the effective of cable inner wire by this sensor, can improve fiber-optic grating sensor and the optical fiber survival rate in cable manufacturing and application process, guarantee that fiber grating can stably be operated under the big stress state of cable, the production process that makes fiber grating withstand cable is not destroyed.Guarantee that sensor can be operated under the big stress state steadily in the long term.Make the wavelength variations of fiber grating can reflect the steel wire stressing conditions of cable inside faithfully, and then monitor the whole stressing conditions of cable effectively.
(4) description of drawings
Fig. 1 is an intelligent cable fiber grating strain sensor structural representation of the present invention.
Fig. 2 is the second steel pipe synoptic diagram of the present invention.
Fig. 3 is a bearing part drawing of the present invention.
Fig. 4 is the A-A cut-away view of Fig. 3.
Fig. 5 is the steel wire connection diagram of intelligent cable fiber grating strain sensor of the present invention and cable.
Reference numeral among the figure:
(5) embodiment
Referring to Fig. 1, Fig. 1 is an intelligent cable fiber grating strain sensor structural representation of the present invention.As seen from Figure 1; the intelligent cable fiber grating strain sensor that the present invention relates to; comprise fiber grating 1; second steel pipe 2; first steel pipe 3; the bearing 4 that the protection steel pipe 6 that diameter is slightly thick and being used for is connected with steel wire with cable; described protection steel pipe 6 has one; first steel pipe 3; the bearing 4 and second steel pipe 2 all have two; two first steel pipes 3; two bearings 4 and two second steel pipes 2 are symmetrically arranged in the right and left of described protection steel pipe 6; the diameter of the diameter＜protection steel pipe 6 of the diameter of second steel pipe 2＜first steel pipe 3 wherein; axially grooved in the middle of described second steel pipe 2, as Fig. 2.Bearing 4 upper areas are bored a hole, as Fig. 3 and Fig. 4, passing described bearing 4 upper areas perforation in the middle of first steel pipe 3 with certain gauge length is connected on the bearing 4, described first steel pipe, 3 intermediate radial are cut and are divided into two, the purpose of cutting is that power is directly delivered on the fiber grating, promptly directly draw fiber grating, avoided first steel pipe 3 directly to bear big strain.The two ends of slightly larger in diameter, the protection steel pipe 6 that is of convenient length are set in an end of described two first steel pipes 3; the other end of first steel pipe 3 is sleeved on an end of described second steel pipe 2; fiber grating 1 is passed first steel pipe 3, second steel pipe 2 and protection steel pipe 6; the grating grid region is in protection steel pipe 6 centers; be fixed on fiber grating 1 two ends in the groove of described two second steel pipes 2 with glue; second steel pipe, 2 overcoat thermal shrinkable sleeves, 5 protection fluting positions, described fiber grating 1 two ends tail optical fiber is drawn by the other end of described two second steel pipes 2.
The steel wire 7 at connecting cylinder position effectively is connected in susceptor design by fiber Bragg grating strain sensor and the cable, as shown in Figure 5, the stressed of steel wire will be delivered on the fiber grating effectively in the cable, thereby monitor the stressing conditions of steel wire by the variation of real-time monitoring fiber grating centre wavelength.Arrange by fiber-optic grating sensor suitable on the steel wire in the cable, can realize taking into account simultaneously the whole stressed of cable and the stressed monitoring of local silk.
Claims (1)
1. intelligent cable fiber grating strain sensor; it is characterized in that described sensor comprises fiber grating (1); first steel pipe (3); second steel pipe (2); protection steel pipe (6) and bearing (4); described protection steel pipe (6) has one; first steel pipe (3); bearing (4) and second steel pipe (2) all have two; two first steel pipes (3); two bearings (4) and two second steel pipes (2) are symmetrically arranged in the right and left of described protection steel pipe (6); the diameter of the diameter of the diameter of second steel pipe (2)＜first steel pipe (3)＜protection steel pipe (6) wherein; axially grooved in the middle of described second steel pipe (2); the perforation of bearing (4) upper area; passing the perforation of described bearing (4) upper area in the middle of first steel pipe (3) is connected on the bearing (4); the two ends of protection steel pipe (6) are set in an end of described two first steel pipes (3); the other end of first steel pipe (3) is sleeved on an end of described second steel pipe (2); fiber grating (1) passes second steel pipe (2); first steel pipe (3) and protection steel pipe (6); the grating grid region is in protection steel pipe (6) center; fiber grating (1) two ends are fixed in the groove of described two second steel pipes (2) with glue; second steel pipe (2) fluting place overcoat thermal shrinkable sleeve (5), described fiber grating (1) two ends tail optical fiber is drawn by the other end of described two second steel pipes (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910145153A CN101694372A (en) | 2009-09-30 | 2009-09-30 | Intelligent cable fiber grating strain sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910145153A CN101694372A (en) | 2009-09-30 | 2009-09-30 | Intelligent cable fiber grating strain sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101694372A true CN101694372A (en) | 2010-04-14 |
Family
ID=42093358
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910145153A Pending CN101694372A (en) | 2009-09-30 | 2009-09-30 | Intelligent cable fiber grating strain sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101694372A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103512687A (en) * | 2013-10-22 | 2014-01-15 | 国网电力科学研究院 | Optical fiber reinforcement meter |
| CN104196258A (en) * | 2014-08-14 | 2014-12-10 | 北京市建筑工程研究院有限责任公司 | Post-tensioning prestressing intelligent reinforcement system based on fiber grating sensing technology |
| CN109196394A (en) * | 2016-12-19 | 2019-01-11 | Fbg韩国公司 | Utilize the displacement detector of fiber-optic grating sensor and its adjusting method of sensitivity, durability |
| CN110332902A (en) * | 2019-07-15 | 2019-10-15 | 中国地质大学（武汉） | A kind of friction pile deformation monitoring fixes device and method with distribution type fiber-optic |
| CN117738386A (en) * | 2024-02-18 | 2024-03-22 | 北京市建筑工程研究院有限责任公司 | Fiber bragg grating intelligent steel strand and prestress structure member for building |
-
2009
- 2009-09-30 CN CN200910145153A patent/CN101694372A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103512687A (en) * | 2013-10-22 | 2014-01-15 | 国网电力科学研究院 | Optical fiber reinforcement meter |
| CN104196258A (en) * | 2014-08-14 | 2014-12-10 | 北京市建筑工程研究院有限责任公司 | Post-tensioning prestressing intelligent reinforcement system based on fiber grating sensing technology |
| CN109196394A (en) * | 2016-12-19 | 2019-01-11 | Fbg韩国公司 | Utilize the displacement detector of fiber-optic grating sensor and its adjusting method of sensitivity, durability |
| CN110332902A (en) * | 2019-07-15 | 2019-10-15 | 中国地质大学（武汉） | A kind of friction pile deformation monitoring fixes device and method with distribution type fiber-optic |
| CN117738386A (en) * | 2024-02-18 | 2024-03-22 | 北京市建筑工程研究院有限责任公司 | Fiber bragg grating intelligent steel strand and prestress structure member for building |
| CN117738386B (en) * | 2024-02-18 | 2024-05-07 | 北京市建筑工程研究院有限责任公司 | Fiber bragg grating intelligent steel strand and prestress structure member for building |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US8425111B2 (en) | Bridge intelligent cable system with built-in fiber grating sensor | |
| CN101787676B (en) | Method for assembling cable built-in fiber bragg grating strain transducer | |
| CN201567531U (en) | Smart cable device for bridges with optical fiber grating sensor inside | |
| CN106705877B (en) | A kind of highly sensitive fiber Bragg grating strain sensor based on flexible hinge | |
| US4280363A (en) | System for measurement of force with directionally orientated strain gauges | |
| CN101694372A (en) | Intelligent cable fiber grating strain sensor | |
| CN201535705U (en) | Fiber bragg grating pipeline stress hoop | |
| CN201610523U (en) | Built-in fiber grating strain sensor of cable and mechanical connection structure of in-cable steel wire | |
| CN104567998A (en) | Optical fiber Bragg grating sensing principle-based temperature-self-compensating intelligent bolt | |
| CN102607611B (en) | Embedded type double-layer packaging fiber bragg grating sensor and manufacturing method thereof | |
| CN201614548U (en) | Mounting structure of built-in fiber grating strain transducer of cable | |
| CN103277387A (en) | Intelligent bolt for optical fiber grating sensor | |
| CN102680581A (en) | Matched-type fiber-grating acoustic emission sensing method with temperature compensation | |
| CN1632488A (en) | Anchor cable stress sensor for optical fiber grating dynamometer | |
| CN219908578U (en) | General length type multi-parameter self-sensing intelligent cable | |
| CN201569416U (en) | Intelligent type cable fiber grating strain transducer | |
| CN201620355U (en) | Intelligent cable of built-in sensor | |
| CN201587819U (en) | Large-sized gantry crane utilizing fiber bragg grating to test stress change | |
| CN202401396U (en) | Intelligent cable capable of sensing internal humidity for bridge | |
| CN214040445U (en) | Fiber grating cable force sensor packaging structure | |
| CN107024306A (en) | A kind of intelligent bolt and method for monitoring complicated loads | |
| CN206470011U (en) | A kind of intelligent cable fixing nut | |
| CN214277253U (en) | Mounting structure of fiber grating cable force sensor | |
| CN202024852U (en) | Fiber grating air pressure sensor | |
| CN211178782U (en) | Fiber grating temperature sensor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20100414 |