System and method for monitoring pipeline vibration

Abstract

The invention provides a system and a method for monitoring pipeline vibration. The system comprises a plurality of pipeline vibration monitoring devices arranged on pipeline monitoring points and a central control device connected with each pipeline vibration monitoring device, wherein each pipeline vibration monitoring device comprises a detection device, a conversion device, a connection device, an acquisition device and an analysis processing device which are connected in turn. The method comprises the following steps: establishing a background frequency spectrum; acquiring and processing signals; determining event attribute; determining a fault point and giving an alarm. The method has the advantages that the method detects pipeline state by acquiring pipeline noises, and does not have the disadvantages of a negative pressure wave detection method which is susceptible to low pressure, temperature change and transported substance density; moreover, as for noise influence, the method is only sensitive to noises with the intensity and frequency equivalent to those of an occurring event, and noises at other frequency do not generate greater influence on the method.

Description

technical field [0001] The invention belongs to the field of long-distance pipeline vibration wave measurement and monitoring, and in particular relates to a pipeline vibration monitoring system and method. Background technique [0002] In gas and liquid transportation methods, gas-liquid pipeline transportation is more efficient than traditional road and rail transportation, and also reduces the cost of long-term transportation. But the subsequent pipeline guarantee and pipeline safety have become the focus of attention in pipeline transportation. The first is the loss of transported goods and serious environmental pollution caused by pipeline leakage, and the second is the serious phenomenon of drilling and theft, especially for oil pipelines. All pipeline storage and transportation companies have invested a lot of manpower and material resources in the safety patrol of oil pipelines. , but with little effect. To ensure the safety and environmental protection of pipeline...

AI Technical Summary

Problems solved by technology

[0010] Because many crude oil pipelines in our country are not airtightly transported, and the oil receiving end is directly connected to the large tank, the pressure of the pipeline itself is very low, coupled with the filtering effect of the large diameter pipe and the large tank, the pressure change may be submerged in a noise middle

Therefore, there is a disadvantage of low pressure sensitivity, especially when the leakage time is short and the leakage volume is small, the pressure acquisition is extremely insensitive

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