Oil-gas pipeline vibration monitoring method and device based on vibration wire type sensor

Abstract

The invention relates to an oil-gas pipeline vibration monitoring method and device based on a vibration wire type sensor. According to the method, the parameters of amplitude and acceleration of a pipeline are converted into axial strain through stress on a metal bar (10) and further into the output frequency signals of the vibration wire type strain sensor (12), and by measuring the frequency change signals, measurement of the vibration acceleration of the oil-gas pipeline can be achieved; after fast Fourier transform (FFT) is performed on the vibration acceleration a (t), the vibration spectrum of the pipeline can be obtained and further the vibration period can be obtained; according to the number of waves within a quarter of the vibration period, the amplitude and the frequency in a measuring point can be obtained, and further the amplitude-time-history curve of vortex induced vibration of the pipeline can be drawn up. According to the oil-gas pipeline vibration monitoring method and device based on the vibration wire type sensor, the vibration frequency acceleration of the pipeline is converted into the strain of the vibration wire sensor, so that high-precision, anti-interference and stable-performance automatic monitoring of the vibration frequency of the oil-gas pipeline can be achieved.

Description

technical field [0001] The invention relates to a vibration monitoring method and device for an oil and gas pipeline based on a vibrating wire sensor, and relates to the technical fields of mechanical vibration measurement, general safety devices and pipeline systems. Background technique [0002] Long-distance oil and gas pipelines inevitably pass through areas with complex terrain and geological conditions and harsh natural environments, and are often affected by various geological disasters. In order to monitor the risks caused by geological disasters to pipelines, pipeline management departments often adopt the method of monitoring the stress and strain of the pipe body, which is a very effective method for large-scale soil movement disasters such as landslides, collapses, ground subsidence, and frozen soil. measure. However, for some hydraulic scouring disasters, such as torrential rain, mountain torrents, debris flows, etc., the pipeline is very likely to be washed ou...

AI Technical Summary

Problems solved by technology

[0015] Literature research and patent novelty search show that there is no method and device for monitoring the vibration frequency of oil and gas pipelines using vibrating wire sensors

Images