Analysis of a Nondestructive Evaluation Technique for Defect Characterization in Magnetic Materials Using Local Magnetic Measurements

Figure 4

Calculation of ${\delta }_{\mathit{h}}{\chi }_{\alpha \beta }$ in the lowest strip with thickness $d=0.25\hspace{0.17em}\text{mm}\text{.}$${\chi }_{\alpha \beta }$ denotes the characteristic function of the air gap between $x=\alpha$ and $x=\alpha +\beta ,$ and ${\chi }_{\alpha +t{h}_1,\beta +t{h}_2}$ is the characteristic function of the perturbed air gap between $x=\alpha +t{h}_1$ and $x=\alpha +\beta +t(h_1+h_2)$. The shaded areas represent the support of both functions.