METHOD FOR DETECTION OF DEFECTS IN PIPELINE (VERSIONS) Russian patent published in 2010 - IPC G01N29/14 

FIELD: measurement equipment.

SUBSTANCE: application: for flaw detection in pipeline. Detectors are installed at the ends of investigated pipeline, oscillations generated by defect are registered, besides at the ends of investigated section of pipeline they install one piezoelectric detector, at least two own shapes of reference pipeline oscillations are selected, frequencies of own oscillations of reference pipeline are calculated, confident interval is generated by frequency characteristics of reference pipeline, then frequencies of own oscillations of investigated pipeline are registered by each of selected shapes of oscillations, comparison of investigated pipeline signals registered by detectors is carried out with a confident interval of reference pipeline, and whenever confident interval is exceeded, conclusion is made on availability of pipeline flaw, and to detect location of defect, signals registered by detectors are mutually correlated.

EFFECT: simplified process of flaw detection in pipeline and improved accuracy of defect location detection independently on properties of controlled item material.

2 cl, 1 dwg