Pipeline leakage on-line monitoring device and method based on f fiber temperature detection

Abstract

The invention relates to a pipeline leakage on-line monitoring device and method based on f fiber temperature detection, and belongs to the technical field of pipeline monitoring. The fiber temperature detection based pipeline leakage on-line monitoring device is characterized in that a monitoring main machine is communicated with a temperature sensing optical cable in a communication optical cable way or a wireless signal transmission way; and a light signal sent from the laser source of the monitoring main machine is transmitted to a microprocessor through the temperature sensing optical cable, a signal receiver, a wavelength division multiplexer and an amplifier for processing. The fiber temperature detection based pipeline leakage on-line monitoring method comprises the following steps that: the monitoring main machine is communicated with the temperature sensing optical cable in the communication optical cable way or the wireless signal transmission way; the temperature sensing optical cable senses the change of pipeline leakage temperature and generates a reflected light sensing signal for a laser of the laser source; the signal receiver receivers the light signal and transmits to the microprocessor through the wavelength division multiplexer and the amplifier for processing; and the microprocessor analyzes and displays on-line monitored pipeline leakage. The pipeline leakage on-line monitoring device and method based on the fiber temperature detection have the advantages of wide coverage range, high positioning accuracy, short response time, low false alarm rate, real-time on-line detection, and the like.

Description

technical field [0001] The invention belongs to the technical field of pipeline monitoring, in particular to an online pipeline leakage monitoring device and method based on optical fiber temperature measurement. Background technique [0002] At present, pipeline transportation is the most important energy and chemical raw material in modern society - the main transportation mode of petroleum. Due to its low transportation cost and wide coverage, it is widely used. However, due to internal and external corrosion of pipelines, environmental foundation decline, accidental excavation and other reasons, oil pipeline leakage incidents occur from time to time, which not only cause serious economic losses, but also cause great harm to the environment. [0003] There are three main methods for the existing leakage monitoring of oil pipelines. One is to monitor the leakage through the negative pressure wave generated by the internal and external pressure difference when the pipeline ...

AI Technical Summary

Problems solved by technology

However, due to internal and external corrosion of pipelines, environmental foundation decline, accidental excavation and other reasons, oil pipeline leakage incidents occur from time to time, which not only cause serious economic losses, but also cause great harm to the environment.

[0003] There are three main methods for the existing leakage monitoring of oil pipelines. One is to monitor the leakage through the negative pressure wave generated by the internal and external pressure difference when the pipeline leaks. The disadvantage of this monitoring method is that when the leakage is large ( The signal can only be detected when it exceeds 1%), the loss is large and the positioning is not accurate enough; the second is to use the method of acoustic emission to monitor the leakage. The disadvantage of this method is that the sound wave attenuates too fast, so the length of the pipeline covered is very The third is to judge whether there is leakage by detecting the vibration signal of the pipeline. The disadvantage of this method is that the monitoring results are greatly affected by the surrounding environment, and the false alarm rate is high.

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