![]() ![]() The frequency range was determined by the inner diameter of the pipe (6 in. The modeled (and later the practical) setup consisted of a vector network analyzer providing a sweeping frequency range of microwaves from 1.4 GHz to 2.3 GHz. The initial phases of research were conducted using Computer Simulation Technologies (CST) software and a standard set of PWT specimens so that the simulations could be calibrated. Prior work revealed a promising initial setup and as the work proceeded, adaptations and refinements optimized the results. New possibilities were discovered as the work progressed. The work includes both simulations and practical experiments. The aim is to develop methods for detecting and then characterizing pipe wall thinning (PWT) discontinuities in pipes. ![]() The work of this dissertation is based in this phenomenon. It is known that any irregularity (discontinuity) in the surface will alter the course of the reflected signal, and that the reflected signal can be recaptured and processed algorithmically to generate a waveform characteristic of the discontinuity. Microwaves promulgate through a waveguide, reflecting off its inner surface, of course.
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