Armor optical fiber sensor suitable for road structure full size monitoring

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...

AI Technical Summary

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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