METHOD FOR DETERMINING LOCAL PORTIONS OF MAIN PIPELINES WITH MAXIMAL DEFORMATION Russian patent published in 2006 - IPC G01B17/02 

FIELD: technology for determining local portions of main pipelines with maximal deformation.

SUBSTANCE: method includes measuring oscillations of pipe in area of chambers of launch and receipt, oscillations of body at its immobile state, frequencies and coefficients of damping of fading oscillations are determined for body acceleration as well as transition process time during passage of junctions for selection of spectral analysis distance, spectral characteristics of acceleration signals are estimated for vertical direction of body between junctions, amplitudes level is excluded which is equal to noise in form of pipe and body oscillations at its immobile state, and also pulsing of as pressure; at discontinuous frequencies maximal resonance values are detected for components of Fourier decomposition of acceleration signals, frequencies of three forms of pipe oscillations are detected at representative portions, their positions are determined at route of main pipeline as well as their oscillation amplitudes.

EFFECT: possible estimation of vertical and horizontal deformations of pipelines.

3 cl, 8 dwg