AStudy on Accuracy Improvement of Defect Cross Section Evaluation Using Magnetic Dipole Model

Abstract

In nondestructive inspection method using magnetic flux density leakage, a new response function has been proposed to reflect the total amount of magnetic flux penetrating the magnetic sensor. As a result of inverse analysis using the proposed response function, the ability to restore the defect shape was improved as compared with the case using the conventional response function in the low lift-off region.