EDDY CURRENT PIPELINE INSPECTION APPARATUS AND METHOD

摘要

Apparatuses and methods for inspecting a section of piping are disclosed. In one example embodiment, an apparatus includes first and second excitation coils, a plurality of magnetometers, and a data acquisition system. The first excitation coils are disposed at a first axial location and are energized and the second excitation coils are disposed at a second axial location and are energized. The plurality of magnetometers are disposed at an axial location between the first and second axial locations and are positioned to detect magnetic fields generated by eddy currents induced in the section of piping by the first and second excitation coils. The data acquisition system is operatively connected to receive output data from the plurality of magnetometers.

主权项

1. An apparatus for inspecting a section of piping, the apparatus comprising:
an alternating current power source; a first excitation coil disposed at a first axial location, the first excitation coil being energized by the alternating current power source with a multi-frequency waveform; a second excitation coil disposed at a second axial location, the second excitation coil being energized with the multi-frequency waveform; a plurality of magnetometers disposed at an axial location between the first axial location and the second axial location, wherein the magnetometers are positioned to detect magnetic fields generated by eddy currents induced in the section of piping by the first and second excitation coils; and a data acquisition system operatively connected to receive output data from the plurality of magnetometers; wherein the apparatus is movable axially along the section of piping.