PIPELINE ACOUSTIC CONTROL METHOD Russian patent published in 2024 - IPC G01N29/04 

FIELD: measuring.

SUBSTANCE: use for acoustic control of a pipeline. Essence of the invention consists in the fact that the diagnostic device is moved along the pipeline, wherein the device is equipped with several receiving-emitting elements in contact with the surface of the pipeline, periodic excitation and reception of ultrasonic signals are performed by means of receiving-emitting elements. Based on pre-calculated delay times for all types of acoustic normal waves, echo signals received from each receiving-emitting element are selected, performing their coherent summation, calculating the amplitudes of the resultant echoes and constructing their normalized distributions separately for each type of acoustic waves; then constructing a distribution of a random value, the values of which correspond to the maximum values of the amplitudes of the total echo signals from different types of acoustic waves, received at the points coinciding in coordinates with the receiving-emitting elements, and the presence and size of defects in the walls of the pipeline are determined from the sample distribution characteristics of the value; wherein coherent summation of echo signals, calculation of time delays and their automatic correction based on empirical function reflecting dependence of echo signal delay time on receiving-emitting element position angle is carried out using a diagnostic device, and the empirical function is plotted using the device at the stage of its calibration when scanning a section of the pipeline.

EFFECT: higher reliability of pipeline inspection.

5 cl, 7 dwg