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Bridge intelligent cable system with built-in fiber grating sensor

A grating sensor, fiber grating technology, applied in the direction of bridges, bridge parts, bridge construction, etc., can solve the problems of easy damage, fiber grating fragility, etc., and achieve the effect of improving safety

Active Publication Date: 2010-05-05
FASTEN GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the fiber grating without special treatment is very fragile, it is directly laid in the cable, and it is easy to be damaged

Method used

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  • Bridge intelligent cable system with built-in fiber grating sensor
  • Bridge intelligent cable system with built-in fiber grating sensor
  • Bridge intelligent cable system with built-in fiber grating sensor

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Embodiment Construction

[0026] It has always been a difficult research point to measure the stress state of the cable with the built-in sensor. The packaging structure of the cable built-in fiber grating strain sensor 9 is as follows:

[0027] see figure 1 , figure 1 It is a structural schematic diagram of the fiber grating strain sensor involved in the present invention. Depend on figure 1 It can be seen that the fiber grating strain sensor 9 involved in the present invention includes a first fiber grating 9-1, a second steel pipe 9-2, a first steel pipe 9-3, a slightly thicker first protective steel pipe 9-6 and a The support 9-4 connected with the cable wire, the first protection steel pipe 9-6 has one piece, the first steel pipe 9-3, the support 9-4 and the second steel pipe 9-2 all have two pieces, two pieces The first steel pipe 9-3, the two supports 9-4 and the two second steel pipes 9-2 are symmetrically arranged on the left and right sides of the first protection steel pipe 9-6, wherein t...

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PUM

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Abstract

The invention relates to a bridge intelligent cable system with a built-in fiber grating sensor, which is used for cable bearing structures of a cable-stayed bridge, a suspension bridge, an arch bridge and the like. The bridge intelligent cable system comprises an anchoring cup (1), a dividing plate (5), a connecting cylinder (4), a fiber grating sensor and a cable body (11), wherein the fiber grating sensor comprises a fiber grating strain sensor (9) and a fiber grating temperature sensor (10), tail fibers of the fiber grating strain sensor (9) and the fiber grating temperature sensor (10) are led out, the packaged fiber grating strain sensor (9) is fixedly connected to an outer steel wire (3) at the position of the connecting cylinder (4), the packaged fiber grating temperature sensor is suspended on the steel wire (3) at position of the connecting cylinder (4), a hole (5-1) is penetrated in the dividing plate (5), and preserved steel pipes (7) are primarily imbedded in the connecting cylinder (4) and the anchoring cup (1) in advance. The invention can improve the survival rate of the fiber grating sensor and the optical fibers during the manufacture and the application of the cable, ensure a reliable embedding process of the fiber grating sensor and effectively lead fiber grating signals out of the cable body in a distortionless way.

Description

(1) Technical field [0001] The invention relates to an intelligent cable system with built-in sensors applicable to cable-stayed bridges, suspension bridges, arch bridges and other cable load-bearing structures. (2) Background technology [0002] The cable system of modern long-span bridges is the core component of cable-stayed bridges and suspension bridges. Most of the self-weight and dynamic load on the bridge structure of long-span bridges are transmitted to the tower columns through the cable system, and the working status of the cables is a direct reflection. One of the important symbols of whether the bridge is in a safe state. However, due to structural design, environmental corrosion, fatigue accumulation and other reasons, it is inevitable that cables will be damaged and deteriorated to varying degrees during service. If the sensor can be organically integrated into the cable, so that it can measure internal stress, temperature and other parameters, it can be upgr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01D19/16G01K11/32G01L1/24G01K11/3206
CPCE04C5/125G01K11/3206E01D19/16G01K13/00D07B1/145G01M5/0091G01M5/0025G01L1/246G01M5/0008G01K1/14D07B2301/5577D07B2301/252D07B2301/259G01K11/32G01L1/24
Inventor 刘礼华赵霞姜德生李盛赵军周明宝宁世伟薛花娟张恩隆周祝兵
Owner FASTEN GRP CO LTD
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