A distributed optical fiber real-time tracking system and method for water project seepage flow velocity

Abstract

The invention discloses a water engineering seepage flow velocity distributed optical fiber instant tracking system and method. The system comprises a force resistance side column and a side cylinder. A leakage receiving clamping groove and an outer channel frame are connected between the force resistance side column and the side cylinder. A plurality of leakage receiving guide grooves are formed in the leakage receiving clamping groove. Force transmission measuring barrels are connected with the lower ends of the leakage receiving guide grooves. A flow aiming force transmission body is arranged in each force transmission measuring barrel. The lower end of the flow aiming force transmission body is connected with an elastic accommodating capsule. An initial fiber locking end is arranged at one side of the outer channel frame. A transitional turning wheel is arranged on the initial fiber locking end. A laser-excitation source is arranged on the force resistance side column. The laser-excitation source is connected with a sensing optical cable. The sensing optical cable penetrates through the transitional turning wheel, an optical fiber channel and a tail end fiber locking end in sequence and is connected with an optical source detector on the side cylinder. According to the invention, the monitoring of the seepage flow velocity in the water engineering is indirectly completed by the direct detection of the change of optical fiber optical information, the monitoring effect of the seepage flow velocity of a hydraulic structural body is improved, and the practical engineering monitoring cost is lowered.

Description

technical field [0001] The invention relates to a distributed optical fiber real-time tracking system and method for seepage flow velocity of water engineering, and belongs to the field of monitoring seepage flow velocity of water engineering. Background technique [0002] Under the action of long-term water load, for water projects such as river embankments, seawalls, dams, and sluices, hidden dangers of seepage occur from time to time, especially in severe conditions accompanied by high seepage velocity. Improperly, in a short period of time, it may cause seepage damage or even cause extreme situations of collapse, which is especially prominent for earth-rock dams. However, the causes of seepage damage are complex, random, and difficult to monitor, so that the practical engineering promotion of this technology lags behind the research of related theories. [0003] Conventional and direct monitoring methods cannot reliably and accurately identify the total amount of seepag...

AI Technical Summary

Problems solved by technology

However, the causes of seepage damage are complex, highly random, and difficult to monitor, so that the practical application of this technology lags behind the research of related theories.

[0003] Conventional and direct monitoring methods cannot reliably and accurately identify the total amount of seepage water and the behavior of seepage flow velocity. Exploring advanced, practical and reliable seepage flow velocity behavior identification devices and methods has always been of great concern to the engineering and academic circles. important subject of

With the continuous increase of water engineering construction and the continuous improvement of water conservancy modernization requirements, distributed optical fiber sensing technology has been successfully applied to mass concrete temperature and crack monitoring, slope monitoring, face rockfill dam face crack monitoring, etc. At the same time , the methods and means of seepage flow velocity monitoring and detection have also made great progress, but the exploration of seepage flow velocity monitoring in hydraulic structures is still in the research stage, and there are still many problems in the theory of quantitative monitoring and practical engineering layout applications that need to be studied and solved urgently. It is urgent to develop a seepage flow rate optical fiber sensing system and method that is simple in theory, strong in practicality, and easy to use for a long time based on the characteristics of seepage monitoring in water engineering and the special working environment.

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