| 摘要 |
PURPOSE:To excite the elastic wave pulse group weighting desired value on the elastic energy, by changing the width of the non-crystal magnetostriction elastic body. CONSTITUTION:When pulse current is flown to the zigzag type coil, the pulse magnetic field according to the Ampere's theorem is caused around each folding path of the coil 4, and this magnetic field distribution is different from the direction positive or negative mutually. Since the amount of magnetostriction versus magnetic field performance has the characteristics of line symmetry to the strength 0 of the magnetic field, because the amount of magnetostriction depends on the absolute value, the non-crystal magnetostriction thin plate 1 is excited with the magnetostriction pulse group according to the location of the folding path of the zigzag type coil 4. The scale of the elastic energy of magnetostriction is in proportional to the width of the non-crystal magnetostriction thin plate 1 at the location of each folding path of the coil 4. |
