Distributed fiber temperature-sensitive alarm system data optimization method

Abstract

The invention discloses a distributed fiber temperature-sensitive alarm system data optimization method. The method comprises the following steps: 1) two shifting registers L1 and L2 are established in a data space of an upper computer, each storage space being N, N being secondary accumulation times; 2) a lower computer inputs one-accumulation light intensity data obtained after processing to theupper computer; 3) the upper computer collects Stokes one-accumulation light intensity data and anti-Stokes one-accumulation light intensity data input by the lower computer, and stores the collecteddata to the shifting registers L1 and L2 respectively; when the storage spaces of the shifting registers L1 and L2 are full, data processing initialization step is carries out, and then, in a mannerof left shifting one bit of data in the shifting registers L1 and L2, the new data is supplemented to data items L1(N) and L2(N) of the shifting registers L1 and L2; and 4) when the storage spaces ofthe shifting registers L1 and L2 are full or after each shift operation, the upper computer calculates temperature data T.

Description

technical field [0001] The invention relates to a data optimization algorithm of a distributed optical fiber temperature sensing alarm system, which belongs to the field of optical fiber sensing. Background technique [0002] The distributed optical fiber temperature sensing alarm system is based on the principle of back Raman scattering and is mainly used for on-line monitoring of crude oil and natural gas pipeline leakage. When crude oil leaks, hot oil flows in the soil, and heat exchange occurs at the same time, and the temperature near the leaking pipeline will increase; in natural gas pipelines, the pressure of high-pressure gas is as high as 7-9MPa. When natural gas leaks, Joule- The Thomson effect causes the temperature in the pipe near the leak to drop. The monitoring mechanism of the distributed optical fiber temperature sensing alarm system is to use the fiber core of the communication cable accompanying the pipeline to collect the temperature along the pipeline, ...

AI Technical Summary

Problems solved by technology

At the same time, in the measurement of long-distance single-mode fiber, the dispersion effect is obvious, which seriously affects the temperature accuracy of the fiber end

[0006] Therefore, the response time and temperature accuracy of the current distributed optical fiber temperature alarm system cannot meet the application requirements of crude oil and natural gas pipeline leakage monitoring at the same time, and the current algorithm of the distributed optical fiber temperature alarm system cannot meet the actual use requirements

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