Intelligent monitoring method of optical fiber with ice structure

Abstract

The invention provides an optical fiber intelligent monitoring method for ice structures, in particular an intelligent monitoring method and a technique for single or collinear ice structures, which are based on a Brillouin distributed sensing technique and a local high-precision fiber grating technique. The technical method is based on an optical fiber sensing probe, has the advantages of humidity resistance, long sensing distance, good linearity and repeatability in low-temperature environment, full-distribution type absolute measurement and the like. The method comprises the following steps: the optical fiber sensing probe into which a plurality of fiber gratings are written or an encapsulate FRP-OFBG intelligent bar based on fiber-reinforced plastic is arranged in an ice structure, soas to realize large-scale full-distribution local high-precision test on structural damage and provide comprehensive, direct and reliable information for the safety assessment of the ice structure. The method is particularly applicable to the long-term monitoring for the ice structure or structures bearing ice load, and has the advantages of succinct system, low cost, strong operability, good stability and durability, convenient and reliable sensor layout and the like.

Description

Optical Fiber Intelligent Monitoring Method for Ice Structure (1) Technical field The invention relates to the field of structural damage monitoring methods and technologies, in particular to an optical fiber intelligent monitoring technology for ice structures. (2) Background technology As a solid form of water, ice is a phenomenon that exists in nature. With the development and utilization of marine resources in severe cold areas, the construction of hydraulic structures such as bridges and ports, and the construction of various giant ice and snow buildings, in the ever-changing The effect of ice on these structures under the climate and the change of ice's own characteristics are important factors affecting the safety and reliability of these structural facilities. In 1912, the Titanic collided with an iceberg and sank to the bottom of the sea, killing 1,500 people; from 1962 to 1963, two offshore oil platforms in the Gulf of Alaska in the United States were pushed by i...

AI Technical Summary

Problems solved by technology

Due to the particularity of ice formation conditions (low temperature) and composition (water), traditional monitoring methods (such as electrical measurement, GPS real-time monitoring, etc.) are difficult to monitor the mechanical properties of ice structures reliably for a long time

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