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Improvement of Restoration Accuracy of Semi-elliptical Surface Crack Considering the Resolution of Flux Gate Sensor
Shogo Nakasumi, Takayuki Suzuki
151 - 158
10.3233/978-1-60750-968-4-151
Studies in Applied Electromagnetics and Mechanics
Volume 36: Electromagnetic Nondestructive Evaluation (XV)
Abstract

In non-destructive evaluation using magnetic flux leakage, formulation of a function which associates magnetic dipole and magnetic flux density in terms of geometrical coordinates is modified in order to capture the average magnetic flux value along the sensor length for low lift-off area. The effectiveness is verified through numerical simulation scheme. Inverse analysis of two adjacent semi-elliptical surface cracks is conducted. Cracks are detected separately by using the modified function, and the restored crack shape becomes more proper.

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