In order to accurately detect buried polyethylene(PE)pipelines within urban infrastructure,a buried PE pipeline detection technique based on the acoustic waveguide resonance principle was developed.First,the resonance frequency with the highest amplitude is identified,and specific frequency acoustic waves are excited using an electromagnetic excitation source.Data processing technology is then used to analyze and locate the pipeline.Within the frequency range of 50～500 Hz,resonance phenomena within the PE pipe are significant,with the maximum resonance amplitude corresponding to a frequency of 175.42 Hz.By measuring the maximum amplitude of the resonance signal,the horizontal positioning of the pipeline is achieved.This technology,based on acoustic waveguide theory,can accurately locate the horizontal direction of buried pipelines.
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