Figure 5.

Magnetic field distribution at a distance of 0.37 cm from the surface of the magnetic cylinder with non-deformable model. (a): mattress model; (b): three-dimensional magnetic field distribution at the level of cotton cover; (c): decrease in magnetic flux densities above the surface of cotton cover; (d): magnetic field distribution of magnetic strips on the slice of y = 33 cm, (e): magnetic field distribution of magnetic cylinders on the slice of y = 30 cm. A coordinate system was established at the corner of the mattress, as shown in Figure 5a.