Multiple signal transmission in wide-range position sensor using magnetoelastic wave in FeSiB amorphous wire

A wide-range position sensor using magnetoelastic waves in FeSiB amorphous wire was fabricated. The output signal, whose period is proportional to the sensing distance, is obtained for the range from 0 to 5.0 m with a resolution of 1 mm. A multiple signal transmission in the wire was also studied. As the propagation of the magnetoelastic wave is not interfered by DC or AC electric current (up to 1.6/spl times/10/sup 7/ A/m/sup 2/, 10 MHz), the signals of the electric current and the magnetoelastic wave are transmitted simultaneously in the wire. This advantage is utilized for several proposed applications, such as multiple signal transmission, the delay line and the power supply line in the position sensor.