| 摘要 |
A displacement motion transducer has a scale to which magnetic marks with alternating polarity are applied, magnetic modulation head placed near the scale, at that the excitation windings of the magnetic modulation head are connected to excitation generator of the sinusoidal current of the first harmonics, the first signal winding through the first resonance voltage amplifier of the second harmonics is connected to the first input of the adder, the second input of that one through phase shift circuit by &pgr;/2 and the second resonance voltage amplifier of the second harmonics is connected to the second and the third signal windings of the magnetic modulation head, and the output of the adder – to the circuit of phase separation. Additional magnetic modulation head is used, this is placed at the opposite side of the scale and displaced with respect to the main magnetic modulation head by distance equal to half-length of the mark, and the additional magnetic modulation head through amplification-transformation channel identical to the main amplification-transformation channel is connected to the adder. |
