抄録
The attenuation constants of magnetoelastic waves in cold-drawn amorphous Fe-Si-B wires were precisely measured by an improved method using the partial annealing technique. Experimental results show that the attenuation constant decreases with the frequency of magnetoelastic waves. A very low attenuation constant, 0.167 m-1, was obtained when the frequency of the magnetoelastic waves was 500 kHz. These results indicate that cold-drawn wire is a suitable material for position sensors. We designed a wide-range position sensor that utilizes the propagation delay time of the magnetoelastic wave in a partiallyannealed- after-drawn wire. A sensor made experimentally can detect positions in a distance range of 0 to 1.6m with excellent linearity.
