| 摘要 |
A device (10) for checking the viscoelasticity of a substance within which it is enclosed, consists at least partly of magnetoelastic material surrounded by coil (13) which is connectible to a voltage source to generate a magnetic field along the magnetostrictive material. If the material is laminated onto a non-magnetic material or connectible to a current source on both sides of the coil (13), the device (10) is bent or rotated against the action of the substance within which it is enclosed. The movement of the device changes the impedance of the coil (13), and movement of the device can therefore be checked by measuring the impedance. |
