Quantitative reinforced concrete corrosion degree monitoring system based on optical fiber sensor

Abstract

The invention belongs to a detection technology for monitoring and evaluating durability of a project and a building, and is used for measuring the graded distribution of liquid chlorine ion concentration from the outside to the inside of concrete of a building at parts which are often patted by sea waves in harbor engineering, quantitatively monitoring the corrosion degree and notifying relevant construction and maintenance units to adopt corresponding repair measures. Therefore, the invention adopts the technical scheme as follows: a quantitative reinforced concrete corrosion degree monitoring system based on an optical fiber sensor structurally comprises a broadband light source; an output end of the broadband light source is connected with an input end of a coupler, and outputs of the coupler are respectively connected with the sensor; an output end of the sensor is connected with an input end of an optical switch; the optical switch also comprises a set of control IO bus; an output end of the optical switch is connected with a wavelength demodulation module; the control IO bus is connected with a singlechip microcomputer control module; the wavelength demodulation module is connected with a center computer; the singlechip microcomputer control module is also connected with the center computer. The quantitative reinforced concrete corrosion degree monitoring system is mainly used for monitoring the durability of the project and the building.

Description

technical field [0001] The invention belongs to engineering and building durability monitoring and evaluation detection technology, and in particular relates to a quantitative monitoring system for the corrosion degree of reinforced concrete based on optical fiber sensors. technical background [0002] The durability of reinforced concrete structures is one of the most concerned issues in the fields of public transportation and civil engineering. In practical applications, the degradation of the durability of steel bars will cause the deterioration of the structural performance of the building, thereby shortening its service life and causing a huge safety hazard. Especially in the marine environment, the erosive effect of chloride ions in seawater will directly affect the corrosion of steel bars in concrete, resulting in a decrease in its bearing capacity, and eventually leading to structural collapse. Therefore, liquid chloride ions infiltrating into concrete become the mai...

AI Technical Summary

Problems solved by technology

[0006] In order to overcome the deficiencies of existing technologies, the current mainstream technologies for reinforced concrete corrosion monitoring in harbor engineering cannot measure the gradient distribution of liquid chloride ion concentration in reinforced concrete, cannot use the concentration of liquid chloride ion inside concrete to quantitatively monitor the degree of corrosion, and cannot detect the early stage of steel rigidity. For the three shortcomings of the state when it is in contact with liquid chloride ions but not rusted, a multi-period fiber grating sensor is designed to quantitatively measure the concentration of liquid chloride ions to measure the concrete of buildings where waves often beat in harbor engineering. Quantitatively monitor the degree of corrosion based on the concentration gradient distribution of liquid chloride ions in the interior, and through the obtained penetration depth of seawater chloride ions, detect the state of early reinforcement that has just been in contact with liquid chloride ions without corrosion, and notify the relevant construction and maintenance units to take corresponding repair measures

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