The Study on the Fixed End Wave in Magnetostrictive Position Sensor

The magnetostrictive position sensor is a kind of displacement sensor utilizing the magnetostrictive effect and inverse effect of magnetostrictive material. This essay discussed the influence of the fixed end of the sensor system on the detected signal with the driver impulse. The fixed end waves (a kind of elastic wave) were described and defined in this essay. The mechanisms of torsional magnetic field on the long magnetostrictive material line and fixed end waves were discussed, and relative theory models were constructed in this paper. Experiments showed that the fixed end wave of the system could be generated and transmit along the line with impulse current, which is also a kind of noise wave should be removed or weakened. Consequently, this essay should provide the theory basis and data for promoting the signal quality of the signal detection of the sensor.