CN201610523U - Built-in fiber grating strain sensor of cable and mechanical connection structure of in-cable steel wire - Google Patents
Built-in fiber grating strain sensor of cable and mechanical connection structure of in-cable steel wire Download PDFInfo
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- CN201610523U CN201610523U CN2010201149203U CN201020114920U CN201610523U CN 201610523 U CN201610523 U CN 201610523U CN 2010201149203 U CN2010201149203 U CN 2010201149203U CN 201020114920 U CN201020114920 U CN 201020114920U CN 201610523 U CN201610523 U CN 201610523U
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- strain sensor
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Abstract
The utility model relates to a built-in grating strain sensor of cable and a mechanical connection structure of in-cable steel wire. The built-in grating strain sensor of cable comprises a fiber grating strain sensor (1) and an outer steel wire (2) at the connection cylinder part in the cable. The fiber grating strain sensor (1) is fixed to the surface of the outer steel wire (2) at the connection cylinder part with a holt hoop (3). The mechanical connection structure provided by the utility model is used for effectively connecting the fiber grating strain sensor with the outer steel wire at the connection cylinder part through a compact holt hoop structure design, so that the stress of steel wire in the cable can be accurately transmitted to the sensor. Furthermore the requirement to long-time reliability and stability of the built-in sensor of cable for testing the cable stress is satisfied.
Description
Technical field
The utility model relates to the connected mode of steel wire in a kind of cable built-in fiber bragg grating strain transducer and the rope.Be applicable to cable load-carrying members such as cable stayed bridge, suspension bridge, arch bridge.Belong to bridge construction part technical field.
Background technology
The funicular system of modern Longspan Bridge is the core component of cable stayed bridge and suspension bridge, dynamic load on the deadweight of long-span bridge girder construction and the bridge, the overwhelming majority is 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.If sensor organically can be integrated into cable inside, make and himself can measure parameters such as internal stress, temperature, 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 sensing element of function admirable, can respond to extraneous small strain by moving of bragg reflection wavelength and change, thereby realize parameters such as structural stress, temperature are realized on-line monitoring.It has the adverse circumstances of not being afraid of, be not subjected to ambient noise interference, anti-electromagnetic interference, collection sensing be transmitted in characteristics such as one, simple structure, easy to use, certainty of measurement height.
Application number is that application for a patent for invention that 200910145152.X, name are called " bridge intelligent cable system of built-in fiber grating sensor " discloses fiber grating is made fiber Bragg grating strain sensor with suitable encapsulating structure, and it is arranged in cable connecting cylinder position, but make the intelligent cable of inside dynamometry.The application for a patent for invention that application number is 200910145153.4, name is called " intelligent cable fiber grating strain sensor " discloses the encapsulating structure of special fiber Bragg grating strain sensor.Make the cable built-in sensor can test the stressing conditions of steel wire in the rope exactly, need the steel wire that special fiber Bragg grating strain sensor and cable is interior effectively to be connected.Because intelligent cable inner fiber grating strain transducer is disposable imbedding, the reliability of connected mode will directly influence the effect of Suo Li test.Traditional connected mode is to adopt gluing method, though can guarantee the short-term monitoring effect of Suo Li test, there is aging problem in glue, can not guarantee stability, the reliability requirement of long term monitoring.In addition because the safe handling requirement of steel wire in the cable, any destructive, operation that might influence its intensity can not be carried out in the surface, therefore can not take such as directly fiber Bragg grating strain sensor and the integrally welded mode of steel wire.
Summary of the invention
The purpose of this utility model is to overcome above-mentioned deficiency, provide a kind of can be under the prerequisite of not destroying steel wire, fiber Bragg grating strain sensor effectively is connected with steel wire, makes the stressed mechanical connecting structure that can be delivered to cable built-in fiber bragg grating strain transducer and the interior steel wire of rope on the sensor exactly of steel wire in the cable.
The purpose of this utility model is achieved in that the mechanical connecting structure of steel wire in a kind of cable built-in fiber bragg grating strain transducer and the rope, the cover wire that comprises connecting cylinder position in fiber Bragg grating strain sensor and the cable is fixed in fiber Bragg grating strain sensor the peripheral steel wire surface at connecting cylinder position with anchor ear.
The beneficial effects of the utility model are:
The utility model provides a kind of mechanical connection manner, anchor ear structure design by compactness, the peripheral steel wire of fiber Bragg grating strain sensor with the connecting cylinder position effectively is connected, interior the stressed of steel wire of cable can be delivered on the sensor exactly, guarantee the long-term reliability of cable built-in sensor test Suo Li, the requirement of stability.
Description of drawings
The fiber Bragg grating strain sensor structural representation that Fig. 1 relates to for the utility model.
Fig. 2 is the seat structure schematic diagram of fiber Bragg grating strain sensor of the present utility model.
Fig. 3 is an anchor ear perspective view of the present utility model.
Fig. 4 is the mechanical connecting structure schematic diagram of steel wire in the utility model cable built-in fiber bragg grating strain transducer and the rope.
Fig. 5 is an anchor ear banding sensor of the present utility model and the schematic cross-section that is connected of steel wire.
Reference numeral among the figure:
Fiber Bragg grating strain sensor 1, the first fiber grating 1-1, the second steel pipe 1-2, the first steel pipe 1-3, bearing 1-4, thermal shrinkable sleeve 1-5, protection steel pipe 1-6;
The cover wire 2 at connecting cylinder position in the cable
Bolt 4.
The specific embodiment
Referring to Fig. 1～2, the fiber Bragg grating strain sensor structural representation that Fig. 1 relates to for the utility model.Fig. 2 is the seat structure schematic diagram of fiber Bragg grating strain sensor of the present utility model.By Fig. 1 and Fig. 2 as can be seen, described fiber Bragg grating strain sensor 1 comprises the first fiber grating 1-1, the second steel pipe 1-2, the first steel pipe 1-3, bearing 1-4, thermal shrinkable sleeve 1-5 and protection steel pipe 1-6.
Referring to Fig. 3, Fig. 3 is an anchor ear perspective view of the present utility model.Anchor ear 3 adopts the design of U type, at anchor ear 3 upper end position place perforate 3-1.
Fig. 4 is the mechanical connecting structure schematic diagram of steel wire in the utility model cable built-in fiber bragg grating strain transducer and the rope.Fig. 5 is an anchor ear banding sensor of the present utility model and the schematic cross-section that is connected of steel wire.By Fig. 4～5 as can be seen, fiber Bragg grating strain sensor 1 is fixed in cover wire 2 surfaces at connecting cylinder position in the cable by anchor ear 3, with anchor ear perforate 3-1 place with bolt 4 lockings.By the banding anchor ear, with the stressed fiber Bragg grating strain sensor 1 that is delivered to exactly on the cover wire 2 at connecting cylinder position in the cable.
Claims (1)
1. the mechanical connecting structure of steel wire in cable built-in fiber bragg grating strain transducer and the rope, comprise the cover wire (2) at connecting cylinder position in fiber Bragg grating strain sensor (1) and the cable, it is characterized in that: peripheral steel wire (2) surface of fiber Bragg grating strain sensor (1) being fixed in the connecting cylinder position with anchor ear (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201149203U CN201610523U (en) | 2010-02-08 | 2010-02-08 | Built-in fiber grating strain sensor of cable and mechanical connection structure of in-cable steel wire |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201149203U CN201610523U (en) | 2010-02-08 | 2010-02-08 | Built-in fiber grating strain sensor of cable and mechanical connection structure of in-cable steel wire |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201610523U true CN201610523U (en) | 2010-10-20 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201149203U Expired - Lifetime CN201610523U (en) | 2010-02-08 | 2010-02-08 | Built-in fiber grating strain sensor of cable and mechanical connection structure of in-cable steel wire |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201610523U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105043613A (en) * | 2015-06-02 | 2015-11-11 | 昆山市建设工程质量检测中心 | Cable stress measuring device based on fiber grating sensing technology |
| CN107076585A (en) * | 2015-08-27 | 2017-08-18 | 新日铁住金工程技术株式会社 | Cable and the introduction method that incipient extension strain is imported to optical fiber |
| CN111238710A (en) * | 2020-01-13 | 2020-06-05 | 武汉理工大学 | Bridge cable force state monitoring device and monitoring method based on weak grating array |
| CN111504498A (en) * | 2020-06-01 | 2020-08-07 | 宁波市电力设计院有限公司 | GIS isolator contact temperature on-line monitoring system |
| CN112461417A (en) * | 2020-10-29 | 2021-03-09 | 江苏法尔胜光电科技有限公司 | Mounting structure of fiber grating cable force sensor |
| CN112461418A (en) * | 2020-10-29 | 2021-03-09 | 江苏法尔胜光电科技有限公司 | Fiber grating cable force sensor packaging structure |
-
2010
- 2010-02-08 CN CN2010201149203U patent/CN201610523U/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105043613A (en) * | 2015-06-02 | 2015-11-11 | 昆山市建设工程质量检测中心 | Cable stress measuring device based on fiber grating sensing technology |
| CN107076585A (en) * | 2015-08-27 | 2017-08-18 | 新日铁住金工程技术株式会社 | Cable and the introduction method that incipient extension strain is imported to optical fiber |
| CN107076585B (en) * | 2015-08-27 | 2020-03-13 | 新日铁住金工程技术株式会社 | Cable and method for introducing initial tensile strain into optical fiber |
| CN111238710A (en) * | 2020-01-13 | 2020-06-05 | 武汉理工大学 | Bridge cable force state monitoring device and monitoring method based on weak grating array |
| CN111504498A (en) * | 2020-06-01 | 2020-08-07 | 宁波市电力设计院有限公司 | GIS isolator contact temperature on-line monitoring system |
| CN112461417A (en) * | 2020-10-29 | 2021-03-09 | 江苏法尔胜光电科技有限公司 | Mounting structure of fiber grating cable force sensor |
| CN112461418A (en) * | 2020-10-29 | 2021-03-09 | 江苏法尔胜光电科技有限公司 | Fiber grating cable force sensor packaging structure |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20101020 |
|
| CX01 | Expiry of patent term |