초록 ▼

In one aspect of the present invention, an angle measuring device is described for measuring the angle of a rotating rotor having a plurality of markings spaced thereabout. The device comprises: a sensor positioned adjacent the rotor for detecting the markings and generating a sensor signal in respo

In one aspect of the present invention, an angle measuring device is described for measuring the angle of a rotating rotor having a plurality of markings spaced thereabout. The device comprises: a sensor positioned adjacent the rotor for detecting the markings and generating a sensor signal in response thereto; an indicator device, responsive to the sensor signal, for generating a position signal indicative of the angular position of the rotor. Additionally, a timing circuit is used for measuring the time between contiguous sensor signals; and a comparator is used for comparing at least one of the measured times against at least one predetermined value and for generating a comparison output signal indicative thereof. Finally, a correction circuit is used, in response to the comparison output signal, for correcting the position signal to avoid inaccuracies due to such problems as unequal spacing between the markings.

대표청구항 ▼

In a system for measuring the angle of a rotating rotor having a reference position and a plurality of markings spaced about the rotor, an angle measuring device for indicating the position of the rotor relative to the reference position, comprising: sensor means for detecting the rotor markings and

In a system for measuring the angle of a rotating rotor having a reference position and a plurality of markings spaced about the rotor, an angle measuring device for indicating the position of the rotor relative to the reference position, comprising: sensor means for detecting the rotor markings and generating a sensor signal in response thereto; and indicator means, responsive to said sensor signal, for generating a position signal indicative of the angular position of the rotor relative to the reference position, said indicator means including means for correcting to force said position signal to count to a predetermined maximum number between adjacent sensor signals.