A Novel Magnetic Linear Encoder Designed by Using the Slant Multi-Phase Filtering Model
石玉, 邢怀中, 张怀武, 刘颖力, 荆玉兰, 钟智勇 · Acta Scientiarum Naturalium Universitatis Sunyatseni · 2004
A novel design model based on the slant multi-phase filtering model is presented. A magnetic linear encoder with sinusoidal output voltage waveform has been investigated, and the improved sinusoidal output waveform can be reasily acquired. A minimum 6% of distortion factor, when the difference of slant phase is 2π/3, is observed. It is found that the Wheatstone bridge type sensor, made of NiFe(450A)/NiO(300A) bilayers deposited on Si (001) substrate, can enhance both output signal and thermal stability, and then can be widely used in the field of magneto-resistive sensor.