Research on Multipoint Leak Location of Gas Pipeline Based on Variational Mode Decomposition and Relative Entropy

Figure 4

The result of using acoustic emission to deal with multisource leakage: (a) waveform of the initial positioning signal; (b) spectrum of the initial location signal; (c) RMS of the initial positioning signal; (d) amplitude of the initial positioning signal; (e) energy map of the initial positioning signal; (f) ASL of the initial positioning signal.

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