APPLICATION OF PHASE METHODS IN IDENTIFICATION OF PLACES OF DAMAGE TO INSULATION COATING OF PIPELINES 

Grigor'yan Leontiy Rustemovich, candidate of physical and mathematical sciences, associate professor, sub-department of physics and information systems, Kuban State University (149 Stavropol'skaya street, Krasnodar, Russia), E-mail: leonmezon@mail.ru
Bogatov Nikolay Markovich, doctor of physical and mathematical sciences, professor, head of sub-department of physics and information systems, Kuban State University (149 Stavropol'skaya street, Krasnodar, Russia), E-mail: bogatov@phys.kubsu.ru 

574.22 

10.21685/2307-5538-2020-2-6 

Background. The content of this work is explained by the relevance of the diagnostics of the insulation coating of pipelines. The subject of the study is the phase methods for identifying places of damage to the insulation of pipelines using contact and non-contact methods for removing surface potentials of the soil.
Materials and methods. A distinctive feature of the proposed phase methods is the use of key synchronous detectors, the output signal of which is determined by the amplitude and phase parameters of the monitored signals. To solve the problem of measuring the phase parameters of signals spatially spaced along the generator and receiver pipelines, it is proposed to use synchronous quadrature detectors synchronized with Glonass / GPS signals.
Results. The proposed methodology made it possible to solve the problem of time synchronization using a “technological technique” for measuring the phase of the generator output signal at the starting point of the pipeline under investigation, and to evaluate the phase parameters using broadband and noise-resistant optimal correlation processing of test signals.
Conclusions. The proposed hardware and technological solution allowed us to solve the problem of phase identification of places of damage to the insulation coating from objects spaced apart in space. 

pipelines, circuitry, meters, phase, place of damage, transients, propagation time