Patent ID: 8040129
Filing Date: 2011-10-18
Classification: F16C,G01D

Abstract:
1. A rotation detecting device, comprising: an absolute angle detecting sensor unit to detect a rotation angle of a rotating member in the form of the absolute angle; a rotation pulse signal generating section to generate a rotation pulse signal including an index signal that corresponds to a zero phase of the absolute angle detecting sensor unit under a normal condition and a pulse signal of a constant interval, based on the absolute angle detected by the absolute angle detecting sensor unit; and an absolute angle output mode executing section to output the rotation pulse signal in an absolute angle output mode, under which mode the rotation pulse signal is outputted from the time the index signal has been outputted to the current absolute angle, wherein under the absolute angle output mode the index signal is outputted in response to a request signal from a receiving side circuit, regardless of the zero phase of the absolute angle detecting sensor unit.