| 摘要 |
Transformer of displacement has magnetic-modulation head placed near scale, to that one magnetic marks are applied with alternating polarity. At that excitation windings of the head are connected to former of excitation pulses, first and second signal heads – are connected to the first trigger, and the third – sixth signal windings – to second trigger. Transformer has as well identifier of direction of motion in set of first trigger outputs of which are connected to the first and the second differentiating circuits connected to first inputs of the first and second logical elements AND second inputs of which are connected to outputs of second trigger, and reversing counter. In transformer additional magnetic-modulation head is placed, this is displaced with respect to main magnetic-modulation head by elementary element of scale, excitation windings of magnetic-modulation head are connected to former of excitation pulses. Transformer has as well additional identifier of direction of motion in set of third trigger outputs of which are connected to the third and fourth differentiating circuits connected to first inputs of third and fourth logical elements AND second inputs of which are connected to outputs of the fourth trigger. At that the seventh and eighth signal windings of magnetic-modulation head are connected to the third trigger, ninth-twelfth signal windings – to fourth trigger, and outputs of logical elements AND are connected to reversing amplifier through logical elements OR. |
