Deepwater pipeline damage monitoring method based on fiber grating sensing

Abstract

The embodiment of the invention discloses a deepwater pipeline damage monitoring method based on fiber grating sensing. The method comprises the following steps of: selecting an arrangement section; installing a plurality of fiber grating sensors on the arrangement cross section; arranging the deepwater pipeline provided with the fiber grating sensor in a pressure bin, and the output end of the fiber grating sensor being connected to a fiber grating demodulation system; applying pressure through a pressure bin, and collecting dependent variables; continuously pressurizing until the deepwater pipeline is fractured, and collecting dependent variables of a plurality of time points of the section from deformation to fracture of the deepwater pipeline; storing the corresponding variables after being analyzed and processed, and obtaining a data set; and monitoring the damage condition of the deepwater pipeline according to the obtained data set. According to the invention, the cross section is arranged in a targeted manner, and the characteristic that the fiber grating sensors can be connected in series is combined, so that the problem of arranging a large number of data lines is solved, data is collected in a targeted manner and then is processed, and real-time monitoring of the deepwater pipeline is effectively realized according to the processed data set.

Description

technical field [0001] Embodiments of the present invention relate to the technical field of real-time monitoring of deep-water pipeline damage, and in particular to a method for monitoring damage of deep-water pipelines based on fiber Bragg grating sensing. Background technique [0002] Deepwater pipelines play an important role in the national economy. Therefore, the safety of pipeline transportation is of great significance to economic development and environmental protection. With the growth of time, factors such as changes in pipeline materials and geological changes will have an important impact on the safety of pipelines, so it is particularly important to ensure the safety of deepwater pipelines. [0003] The detection method of the strain gauge sensor is to detect the stress of the pipeline by collecting the signal generated by the deformation of the strain gauge through the strain gauge sensor when the pipeline receives an emergency. [0004] At present, the commo...

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Problems solved by technology

[0006] For this reason, the embodiment of the present invention provides a deep water pipeline damage monitoring method based on fiber Bragg grating sensing, which solves the problem of arranging a large number of data lines by setting the layout section in a targeted manner and combining the characteristics that fiber Bragg grating sensors can be connected in series. At the same time, the data is collected and processed in a targeted manner, and the real-time monitoring of deep-water pipelines is effectively realized according to the processed data set.

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