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 amorp hous wire was fabricated. The output signal, whose period is proportio nal 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 no t interfered by DC or AC electric current (up to 1.6x10(7) A/m(2), 10 MHz), the signals of the electric current and the magnetoelastic wave are transmitted simultaneously in the wire. This advantage is utilized far several proposed applications, such as a multiple signal transmis sion, the delay line and power supply Line in the position sensor.