METHOD OF ULTRASONIC CONTROL OF PIPELINE AND SYSTEM FOR ITS IMPLEMENTATION

FIELD: physics.SUBSTANCE: when moving along the pipeline, ultrasonic (US) vibrations in a given area of the outer or inner surface associated with the diagnostic device are periodically excited, taking the US vibrations from the same implementation region from the acoustic normal waves reflected from various discontinuities in the material of the walls, and as a result of processing the accepted implementations, the distribution of defects in the pipe wall is determined. The US vibrations are excited tangential to the pipeline surface by vibrational forces of acoustic contacts of the receiving and radiating elements of the diagnostic device alternately at each point. An oscillation reception is performed simultaneously at all points within the specified region in the selected time interval and from the implementations of the US vibrations received at all points of the pipeline surface as it moves along it, according to the previously calculated delay times, for all types of acoustic normal waves, the echoes are selected from each point of the wall surfaces, they are coherently summed for each point of the surface separately for each wave type, the amplitudes of the sum signals are calculated and the normalized distributions of these amplitudes are constructed in accordance with the coordinates of points on the surface of the pipeline walls, separately for each type of acoustic waves, after which a single magnitude distribution is formed, the values of which are equal to the maximum values of the sum signal amplitudes from different types of acoustic waves for the surface points of the pipeline walls matching by the coordinates, and this distribution is judged on the presence and magnitude of defects in the pipeline wall.EFFECT: providing the possibility of detecting small-sized and slightly reflecting defects in the pipeline walls.10 cl, 3 dwg Использование: для ультразвукового (УЗ) неразрушающего контроля протяженных металлических изделий. Сущность изобретения заключается в том, что при перемещении вдоль трубопровода периодически возбуждают УЗ колебания в заданной области внешней или внутренней его поверхности, связанной с диагностическим устройством, принимают из этой же области реализации УЗ колебаний от акустических нормальных волн, отраженных от различных нарушений сплошности материала стенок, и в результате обработки принятых реализаций определяют распределение дефектов в стенках трубопровода, при этом возбуждают УЗ колебания касательными к поверхнос