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长输气管道破裂会发生气体的泄露事故,不仅会造成严重的生命及财产损失,还会破坏自然环境,因此,必须研究及开发长输气管道泄露定位技术,从而保障管道的正常和安全地运行。小波变换具有多分辨率和时频局域化的特点,可以用来对信号的异常点进行定位。本文首先介绍了小波变换的基本原理,然后通过设计的一段长输气管道泄露信号,通过模型实验证实了该方法对长输气管道泄露点的定位具有良好的效果。
Long gas pipeline rupture will occur gas leakage accident, not only cause serious loss of life and property, but also undermine the natural environment, it is necessary to research and development of long-distance gas pipeline leak positioning technology to ensure the normal and safe pipeline run. Wavelet transform with multi-resolution and time-frequency localization of the characteristics of the signal can be used to locate abnormal points. In this paper, the basic principle of wavelet transform is introduced firstly. Then a leak signal of a long gas pipeline is designed. The model experiment shows that this method has a good effect on the location of the long gas pipeline leak point.