An optical fiber pipe monitoring system

Abstract

The invention pertains to the pipeline monitoring technology, particularly a fiber pipeline monitoring system. The system is composed of an optical transmitter module, an optical interferometer module, a monitoring line, a modulator module, an optical receiver module and a signal processing module. The system can get two signals corresponding to different optical path positions of the same vibration though multiplexing a fiber interference system, compare the spectrum characteristics of the two signals, and eliminate the interference of the position information caused by the vibration information so as to obtain the accurate vibration position information under the condition that the system adds no photoelectric detector. The position information is obtained through the medium value of the spectrum amplitude ratio of the two signals, and the difference caused by the instability of the detection signal is eliminated, thus the accuracy of the location is greatly improved. The location function is realized with single-core fiber under the condition of not constituting a loop, thus the location monitoring can be realized by paving equal-distance main line along the petroleum pipe line, which has strong environmental applicability.

Description

technical field [0001] The invention belongs to the technical field of pipeline safety monitoring, in particular to an optical fiber pipeline monitoring system. Background technique [0002] Maintaining the security of infrastructure is a basic requirement for social stability and rapid economic development. At present, my country's monitoring of infrastructure such as oil and gas pipelines, power grids, and communication networks is mainly based on some production parameters of the facilities themselves (such as sudden pressure drops, abnormal changes in the liquid level of oil tanks in intermediate stations), manual inspections, and reports from passers-by, etc. means. These methods are low in technical content, and generally have defects such as low efficiency, poor real-time performance, long response time, and poor anti-interference ability. Often, the alarm can only be called after the monitoring facilities are damaged, and the practicability is restricted by both natu...

AI Technical Summary

Problems solved by technology

These methods are low in technical content, and generally have defects such as low efficiency, poor real-time performance, long response time, and poor anti-interference ability. Usually, the alarm can only be called after the monitoring facilities are damaged, and the practicability is restricted by both natural and human factors.

This "remedial" post-event detection technology can only reduce but not avoid losses

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