Microwave Detection of Cracks in Buried Pipes using the Complex Frequency Technique
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Microwave Detection of Cracks in Buried Pipes using the Complex Frequency TechniqueAbstract
This work outlines a new technique for detecting cracks in buried pipes using scattered fields. The matrix pencil method (MPM) is applied on synthetic data to extract the natural frequency poles. A 50 cm long hollow pipe, 2.5 cm in diameter, and 5 mm in thickness is considered. Cracks of arc lengths of 6 cm and 4 cm with a width of 0.5 mm are introduced into the metallic pipes. It is shown that the MPM has the capability to extract distinctive poles associated with these cracks even when the pipe is hidden behind plywood, buried in sand, or when the synthetic data is corrupted with random noise of 10 dB signal to noise ratio.
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