METHOD FOR NON-CONTACT DETECTION OF POSITION AND TYPE OF DEFECTS OF METALLIC STRUCTURES AND DEVICE FOR REALIZATION OF SAID METHOD Russian patent published in 2005 - IPC

FIELD: pipeline construction technologies.

SUBSTANCE: method shows presence and location of defects of metallic pipelines, includes measuring above pipeline in given points during movement of magnetic field vectors in rectangular coordinates, by at least two three-component sensors, tensor of magnetic field gradients is built, by matrix transformation received information is processed, on basis of results background value is estimated and deviations from this value, on basis of difference of which for given criterion value from background value presence and location of defects of metallic pipelines is decided and magnetic graph is built to show location of defects. Device for realization of method has registration sensors system, quartz generator, frequency divider, analog-digital converter, control block, threshold block, sound and light indication block, automatic battery charge indicator, block for calculation of magnetic field gradients, block for showing information, recording device segment, recording control block, situation alignment block, block for satellite absolute geographic alignment GPS, block for selecting recording segment.

EFFECT: broader functional capabilities, higher trustworthiness, higher efficiency.

2 cl, 4 dwg