A natural gas pipeline safety monitoring method based on acoustic pulse compression

Abstract

The invention relates to a natural gas pipeline safety monitoring method based on acoustic pulse compression, which belongs to the field of pipeline safety monitoring. The process includes: transmitting a chirp pulse sound wave signal into the pipeline, the sensor receives the reflected signal, and the data acquisition card transmits it to the host computer for relevant data processing. The data processing includes the following steps: first, the collected signal is subjected to matched filtering, envelope extraction and difference calculation, and then the time difference between the transmitted and reflected signals in the difference curve is calculated to realize the location of hydrate blockage or pipeline leakage. The main advantages of the present invention are high positioning accuracy, good real-time performance, wide system monitoring range, and high spatial resolution. Pulse compression technology can realize effective compression of signals, and solve the contradiction between system spatial resolution and monitoring distance. The algorithm can realize real-time dynamic monitoring of the hydrate formation process, and the matched filter technology can effectively suppress severe noise pollution.

Description

technical field [0001] The invention relates to a natural gas pipeline safety monitoring method based on acoustic pulse compression, which belongs to the field of pipeline safety monitoring. Background technique [0002] With the sustained and rapid development of the national economy, my country's demand for clean and high-quality energy, especially natural gas, is becoming more and more urgent. Due to the special medium of natural gas itself, especially in harsh environments, pipelines have become a suitable and stable mode of natural gas transportation and have attracted the attention of the whole society. However, under certain high pressure and low temperature conditions, natural gas pipelines are prone to blockage of hydrates, which seriously threatens the safety of pipelines, and pipeline leakage may also lead to serious life safety accidents and economic losses. Therefore, online monitoring and location of hydrate blockage and leakage in natural gas pipelines is of ...

AI Technical Summary

Problems solved by technology

However, this technology still has certain limitations. Since the excitation signal is a single-frequency sinusoidal signal, it is easily affected by noise. When the frequency of the excitation signal is within the noise spectrum range, the signal-to-noise ratio of the reflected signal is seriously reduced or even submerged by noise.

In addition, in the case of a fixed sound source power, in order to increase the detection distance, the width of the sound pulse needs to be increased to increase the average power of the signal, and the increase of the sound pulse width will lead to a decrease in spatial resolution and positioning accuracy

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