Two-step feature extraction of acoustic emission signals for leakage detection of valves in gas pipelines

IF 3 2区工程技术 Q2 ENGINEERING, MECHANICAL

International Journal of Pressure Vessels and Piping Pub Date : 2024-11-17 DOI:10.1016/j.ijpvp.2024.105364

Jing Xie , Wenao Wang , Changhang Xu , Mingfu Fu , Weiping Huang

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引用次数: 0

Abstract

Evaluation of valve conditions is necessary to maintain integrity of pipelines and can be achieved using Acoustic Emission (AE) technique. Effective feature extraction from AE signals is critical to improving the accuracy of evaluation on valve conditions. In this study, a new method is proposed for processing AE signals to extract a two-dimension feature, which can characterize valve conditions more accurately. Time-frequency features of AE signal are extracted through Mel-spectrum analysis and then a deeper feature is extracted by a Generative Adversarial Network (GAN) model. Experiments were implemented considering three working conditions under three pressure levels in the pipeline. Results show that based on the extracted feature, leakage condition and non-leakage condition can be entirely differentiated and investigated leakage conditions can be differentiated with a high accuracy. By extracting the new effective feature, the proposed method provides a new way to effectively evaluate valve conditions.

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声发射信号的两步特征提取，用于天然气管道阀门泄漏检测

要保持管道的完整性，就必须对阀门状况进行评估，而声学发射（AE）技术可以实现这一目标。从 AE 信号中有效提取特征对于提高阀门状况评估的准确性至关重要。本研究提出了一种处理声发射信号的新方法，以提取二维特征，从而更准确地描述阀门状况。通过 Mel 频谱分析提取 AE 信号的时频特征，然后通过生成对抗网络（GAN）模型提取更深层次的特征。实验考虑了管道中三个压力等级下的三种工作条件。结果表明，根据提取的特征，泄漏工况和非泄漏工况完全可以区分开来，而且泄漏工况的调查区分精度很高。通过提取新的有效特征，所提出的方法为有效评估阀门状况提供了一种新方法。

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来源期刊

International Journal of Pressure Vessels and Piping 工程技术-工程：机械

CiteScore

5.30

自引率

13.30%

发文量

208

审稿时长

17 months

期刊介绍： Pressure vessel engineering technology is of importance in many branches of industry. This journal publishes the latest research results and related information on all its associated aspects, with particular emphasis on the structural integrity assessment, maintenance and life extension of pressurised process engineering plants. The anticipated coverage of the International Journal of Pressure Vessels and Piping ranges from simple mass-produced pressure vessels to large custom-built vessels and tanks. Pressure vessels technology is a developing field, and contributions on the following topics will therefore be welcome: • Pressure vessel engineering • Structural integrity assessment • Design methods • Codes and standards • Fabrication and welding • Materials properties requirements • Inspection and quality management • Maintenance and life extension • Ageing and environmental effects • Life management Of particular importance are papers covering aspects of significant practical application which could lead to major improvements in economy, reliability and useful life. While most accepted papers represent the results of original applied research, critical reviews of topical interest by world-leading experts will also appear from time to time. International Journal of Pressure Vessels and Piping is indispensable reading for engineering professionals involved in the energy, petrochemicals, process plant, transport, aerospace and related industries; for manufacturers of pressure vessels and ancillary equipment; and for academics pursuing research in these areas.