Patent ID: 7800359
Filing Date: 2010-09-21
Classification: B62D,G01D,G01L

Abstract:
1. A relative rotational position detection apparatus for detecting a relative rotational position between first and second shafts rotatable relative to each other, said relative rotational position detection apparatus comprising: a first sensor for detecting a rotational position of the first shaft section in a noncontact fashion and generating a first output signal by phase-shifting a reference A.C. signal in accordance with the detected rotational position of said first shaft section; a second sensor for detecting a rotational position of the second shaft section in a noncontact fashion and generating a second output signal by phase-shifting the reference A.C. signal in accordance with the detected rotational position of said second shaft section; and an output circuit for outputting a first timing signal corresponding to a phase shift amount of said first output signal and a second timing signal corresponding to a phase shift amount of said second output signal, via respective output lines, wherein relative rotational position detection data is outputted via the two output lines extending from said output circuit, and the relative rotational position detection data appears in a time difference between said first timing signal and said second timing signal, and wherein said first and second shaft sections are interconnected via a torsion bar, and an amount of torsion between said first and second shaft sections is detected as a relative rotational position.