Pipeline leakage monitoring system and method

Abstract

The invention discloses a pipeline leakage monitoring system which comprises a front end sensor subsystem and a leakage monitoring signal conditioning subsystem with a current loop receiving module, a signal restore module, a second lower-frequency amplification module and a second lowpass filter module. The front end sensor subsystem is used for amplifying and filtering dynamic pressure signals generated due to dynamic pressure changes at the leakage moment of a pipeline and then converting the dynamic pressure signals into current signals, the current signals are transmitted to the leakage monitoring signal conditioning subsystem, the leakage monitoring signal conditioning subsystem converts the received current signals into dynamic pressure signals, and then amplifies and filters the dynamic pressure signals, and then the dynamic pressure data of the pipeline leakage are recorded. The invention further discloses a pipeline leakage monitoring method. According to the pipeline leakage monitoring system and method, a sensing system is high in sensitivity, capable of responding to tiny signals, high in signal to noise ratio, compact in structure, long in service life, safe and reliable, and cannot be interfered by electromagnetism easily.

Description

technical field [0001] The invention relates to the technical field of pipeline monitoring, in particular to a pipeline leakage monitoring system and method. Background technique [0002] The oil pipeline is composed of pipelines, equipment and accessories. According to the needs of the process, it is equipped with corresponding oil pump units, designed and installed as a complete pipeline system to complete the oil loading and unloading and transportation tasks. [0003] The earlier pipeline leakage monitoring technology includes using the flow balance method to monitor the flow difference between the inlet and outlet of the pipeline to judge leakage; installing pressure transmitters at oil pumping stations to collect pressure data to judge whether there is leakage; installing gas sensors along the pipeline to monitor leakage The combustible gas in the soil pores can be used to judge whether there is a leak. [0004] The flow balance method can detect small leaks, but the ...

AI Technical Summary

Problems solved by technology

Under normal circumstances, when the pipeline is affected by temperature and environment, the pressure signal collected by the pressure transmitter only accounts for a small proportion of the full-scale output value, so the pressure change with a small output value cannot be accurately measured. take measurements

[0006] The gas-sensing method can locate the leak location and monitor tiny leaks, but it needs to be arranged in high density along the pipeline, which is costly and difficult to implement

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