Simulation Study on Pipeline Deformation Defect Detection Based on Eddy Current Effect

Oil and gas pipeline deformation detector is of great significance for pipeline deformation detection. In view of the poor throughput of small diameter oil and gas pipelines, this paper presents an internal deformation detection technology based on eddy current effect. Based on the eddy current theory, a mathematical model for eddy current testing of pipeline deformation defects is established. The relationship between probe lift-off value and magnetic field intensity is studied by numerical calculation method. The results show that under the same lift-off value, the composite magnetic field intensity is negatively correlated with the axis distance of the excitation coil, and at the same position, the composite magnetic field intensity is positively correlated with the lift-off value. The research in this paper has certain guiding significance for the internal detection technology of pipeline deformation defect. (paper)