| Abstrakt: |
The article is devoted to the development of methods for diagnosing underground pipelines, is the development of the well-known correlation method for determining the coordinates of leaks in the direction of taking into account complications that introduce a multiplicity of types of waves and damage in conjunction with extraneous interference. Development begins with the construction of a diagnostic model of the pipeline section. The presence of damages on it as sources of stationary acoustic noises, multi-wave propagation of these noises to the leak detector sensors, as well as the presence of extraneous, statistically unrelated noises are modeled. The model is designed to formalize the existing complications and build adequate algorithms for their solutions. Then a list of diagnostic parameters is formed, which, in terms of interference distortions, characterizes in magnitude the quality of selection of individual waves, including informative waves of water hammer. The concept of a coordinate shelf as an indicator of the presence of correlation in the calculated spectra of the parameters of correlation functions is presented. The relationship of complications with these parameters is analyzed, conclusions are drawn regarding their further use. [ABSTRACT FROM AUTHOR] |
