Armor optical fiber sensor suitable for road structure full size monitoring

A fiber optic sensor and road structure technology, applied in measuring devices, instruments, optical devices, etc., can solve the problems of limited test range and range, easy to be damaged, etc., to achieve long-term stable deformation, good test range, and improve survival rate effect

Inactive Publication Date: 2012-08-08
DALIAN UNIV OF TECH
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Problems solved by technology

[0003] The purpose of the present invention is to provide an armored optical fiber sensor with high survival rate, adjustable measuring range, and synchronous realization of large-scale and local testing, which solves the problems that optical fibers are easily damaged during road construction and operation, and the testing range and measuring range are limited. question

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  • Armor optical fiber sensor suitable for road structure full size monitoring
  • Armor optical fiber sensor suitable for road structure full size monitoring
  • Armor optical fiber sensor suitable for road structure full size monitoring

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Embodiment Construction

[0017] The specific implementation manners of the present invention will be described in detail below in conjunction with the technical solutions (and accompanying drawings).

[0018] A system for large-scale and local large-strain monitoring of road structures using optical fiber sensing technology, as shown in the attached figure 1 and figure 2 As shown, it mainly includes: 1 distributed optical fiber (sensing optical fiber and transmission optical fiber); 2 armored wire; 3 rubber; 4 clamping block; 5 micro spring; 6FBG. Among them, the structure of the fiber optic sensor for the full-scale test of the road structure is shown in the attached figure 1 As shown, the fiber optic sensor for local testing of road structures is shown in the attached figure 2 shown.

[0019] The armored optical fiber sensing technology for full-scale monitoring of road structures, including large-scale and local testing technologies, is implemented as follows:

[0020] For local high-precisio...

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Abstract

Armor optical fiber sensing technology suitable for road structure full size monitoring belongs to the field of intelligent structure health monitoring and is characterized in that a distributed optical fiber or a fiber bragg grating (FBG) is utilized to conduct large-scale or local large-strain high accuracy on a road structure, an armor line is adopted to serve as a protection sleeve and resist severe service environment in a test, a miniature spring is utilized to preset a microbend non-stress optical fiber section to achieve the effect of improving optical fiber sensor test system range, so that the armor optical fiber sensor is suitable for large-strain monitoring of initial stage molding and back-stage damage of the road structure and achieves grasp of dynamic performance of a road structure full life period. The armor optical fiber sensor has the advantages of being capable of greatly improving application survival rate of the optical fiber and the FBG in the road structure and well adjusting measurement range of sensing elements, suitable for large-deformation test in the laying process of the road structure and capable of achieving measurement of permanent stable deformation of the road structure.

Description

technical field [0001] The invention belongs to the field of structural intelligent monitoring and monitoring, and relates to an optical fiber packaging and sensing technology suitable for full-scale monitoring of road structures. Background technique [0002] The rapid development of the domestic economy has promoted a sharp increase in the distribution range and mileage of roads. However, natural disasters, man-made effects, and the impact of regional climate have caused a large number of road sections to withdraw from work before their service life is far shorter. Due to the limitations brought about by the ideal assumptions in classical calculation theory, the performance of road structures in operation can only be obtained through detection technology. At present, traditional methods such as manual inspection and core drilling sampling, which are commonly used at present, have outstanding defects such as low detection efficiency, poor accuracy, and narrow range, while m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B11/16
Inventor 刘婉秋王花平周智
Owner DALIAN UNIV OF TECH
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