Distributed optical fiber and flow pressure value-based pipeline leakage joint detection method

Abstract

The invention discloses a distributed optical fiber and flow pressure value-based pipeline leakage joint detection method, which belongs to the field of pipeline leakage monitoring. A Sagnac interferometer principle-based distributed optical fiber pipeline leakage detection method is adopted in a ship pipeline and an optical switch is used at a light source outlet in place of an optical fiber coupler; complete light returning equipment is adopted at the tail end of the pipeline to replace an optical fiber ring structure; a flow sensor and a pressure sensor are arranged at the inlet of each section of pipeline respectively, and a pressure sensor is arranged at the outlet of each section of pipeline; an inlet flow threshold value and an inlet-outlet pressure difference threshold value are set for each section of pipeline; a phase difference characteristic signal and a flow and pressure variation signal generated by an optical fiber sensor are acquired to a computer and analyzed; when the two signals indicate that leakage occurs, the section of pipeline leaks; and when one signal indicates that the leakage occurs, the working condition of a system is continuously investigated on sitemanually so as to judge whether the leakage occurs. The method is suitable to be applied to the ship pipeline.

Description

field of invention [0001] The invention relates to a joint detection method for pipeline leakage based on distributed optical fiber and flow pressure value, belonging to the field of pipeline leakage monitoring. Background technique [0002] The pipeline is an important part of the ship system, and the oil, water, steam, high-pressure air and other media in the ship are transmitted through different pipeline systems. Due to the sudden change of pressure in the pipeline caused by the abnormal operation of the system, long-term seawater erosion and corrosion, the system pipeline or connecting accessories (such as flanges, joints, etc.) will leak, which will cause great harm to the safety of the ship. In particular, the large-diameter pipelines leading to the sea are mostly arranged on the bottom floor of the cabin, and the upper part of the pipeline is generally covered with sliding iron plates, and some pipe sections are also arranged inside the watertight liquid tank, which ...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to propose a method based on distributed Joint detection method of pipeline leakage based on optical fiber and flow pressure value

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