Optical fiber one- and two-way bending curvature double-channel tracking monitor and monitoring method

Abstract

The invention discloses an optical fiber one- and two-way bending curvature double-channel tracking monitor and a monitoring method. The monitor comprises an optical fiber platform deck and optical fiber stress moving platform decks. A bending pond is disposed between the optical fiber stress moving platform decks at two ends. Each optical fiber stress moving platform deck is connected with a force bearing end through force transmission shafts, one side of the optical fiber stress moving platform deck is connected with a connecting rod dial, an auxiliary connecting rod dial is disposed on the connecting rod dial, the other side of the optical fiber stress moving platform deck is fixedly connected with a magnetic rotation optical fiber fastener, a platform deck transverse rail is disposed at the bottom of the optical fiber stress moving platform deck, a platform deck moving passage is arranged at the top of the optical fiber stress moving platform deck, a passage highly-elastic inner ring is disposed outside the platform deck moving passage, a crescent protecting end is disposed outside the passage highly-elastic inner ring, and the crescent protecting end is connected with a support rod through a screwing fixing shaft. The monitor has the advantages that equipment which is reliable, portable and multipurpose is provided for actual projects, and the monitor is efficient, easy to operate, low in cost, scientific and reasonable, multifunctional and high in adaptability.

Description

technical field [0001] The invention relates to an optical fiber bending curvature tracking monitoring device and a method for monitoring the optical fiber curvature loss value, in particular to a double-layer synchronous deformation double-channel arrangement of the calibration optical fiber and the test optical fiber used in indoor tests and engineering applications and single- and bi-directional bending of the optical fiber Equipment for tracking and monitoring curvature behavior. Background technique [0002] With the increasing development of optical technology, the monitoring technology of optical fiber sensing has become an important means in the field of structural engineering safety monitoring. In my country, the world's largest hydropower station - the Three Gorges Project, and the world's highest arch dam - Jinping Hydropower Station under construction are both There are practical applications of optical fiber monitoring, but whether it is in the production of opti...

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Problems solved by technology

[0002] With the increasing development of optical technology, the monitoring technology of optical fiber sensing has become an important means in the field of structural engineering safety monitoring. In my country, the world's largest hydropower station - the Three Gorges Project, and the world's highest arch dam - Jinping Hydropower Station under construction are both There are practical applications of optical fiber monitoring, but whether it is in the production of optical fibers, laboratory tests or practical applications, there are still problems in obtaining the bending curvature of optical fibers, especially for complex multi-material interactions such as soil-rock joints of earth-rock embankments. Structural bodies, the problem of obtaining the bending curvature of optical fibers is extremely common and extremely important, and there is an urgent need to develop a hand-held, portable, easy-to-observe, multi-repeatable, and high-precision optical fiber bending curvature behavior tracking monitor

[0003] At present, optical fiber sensing instruments made of optical fiber bending characteristics are beginning to appear at home and abroad, and the development of macroscopic and microscopic monitoring methods and equipment for bending curvature is also being strengthened. However, from the perspective of published methods and equipment, engineering practicality Weak, and there is a certain irrationality in the structure, which makes it difficult to guarantee the monitoring results. There is a big difference between the complexity of the manufacturing process of some equipment and the waste of materials and its actual application value, and the cost performance is extremely low, especially for complex structures. The multi-bending phenomenon that may appear in the body is even more inapplicable

[0004] Based on the complexity of the actual engineering application environment involved, the present invention cleverly combines the basic mechanical characteristics of optical fibers, and develops an optical fiber multi-directional bending curvature tracking monitor in order to maximize, efficiently and accurately realize the tracking and monitoring of optical fiber bending curvature , especially for the current situation that there is no multi-combination and multi-directional monitoring instrument for optical fiber bending curvature, the present invention innovatively arranges the double-layer synchronous deformation of the calibration optical fiber and the test optical fiber, and develops a single- and bi-directional monitoring device for optical fiber bending curvature

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