Patent
Rotational angle transducer
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TLDR
In this paper, a contactless rotational angle transducer is used to generate an output signal indicating the angular position of a rotatable object, where the number of complete or partial turns of the object can be measured.Abstract:
A contactless rotational angle transducer for developing an output signal indicative of the angular position of a rotatable object comprising a fixed stator plate having a plurality of electrically isolated sector members, a parallel spaced-apart confronting plate, and a sector rotor plate situated between the stator and confronting plates and rotatably coupled to the rotatable object. An AC excitation voltage is impressed at a fixed phase relationship on each sector member such that the voltage induced in the confronting plate is a function of the angular position of the rotor plate. A pulse generator circuit responsive to the relative phase difference between the voltage induced on the confronting plate and the applied excitation signal develops a pulse-width modulated or pulse-positionmodulated output signal indicative of the angular position of the rotatable object, wherein the number of complete or partial turns of the rotatable object can be measured.read more
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