초록 ▼

A set rotation angle width related to a rotary machine, of which the rotation speed varies cyclically, is converted to a time width required for the rotary machine to rotate by the set rotation angle width from a given rotation angle position. The converted time width is corrected by a correcting co

A set rotation angle width related to a rotary machine, of which the rotation speed varies cyclically, is converted to a time width required for the rotary machine to rotate by the set rotation angle width from a given rotation angle position. The converted time width is corrected by a correcting coefficient so that the time width is not affected by the rotation variation of the rotary machine. The correcting coefficient is decided based on the rotation angle position and the rotation speed variation of the rotary machine related to the set rotation angle width from the rotation angle position, and by the correcting coefficient, correction is done so that an actual rotation angle width corresponding to the converted time width becomes the set rotation angle width.

대표청구항 ▼

An apparatus for converting a set rotation angle width related to a rotary machine, of which rotation speed varies cyclically, into a time width required for said rotary machine to rotate by said set rotation angle width from a given rotation angle position comprising; scale pulse train signal gener

An apparatus for converting a set rotation angle width related to a rotary machine, of which rotation speed varies cyclically, into a time width required for said rotary machine to rotate by said set rotation angle width from a given rotation angle position comprising; scale pulse train signal generating means for generating a scale pulse train signal having a scale pulse given whenever said rotary machine rotates a predetermined unit rotation angle; reference pulse train signal generating means for generating a reference pulse train signal having a reference pulse for identifying each scale pulse of said scale pulse train signal; converting means, responsive to said scale pulse train signal, said reference pulse train signal and said set rotation angle width, for detecting a spacing time of a specified scale pulse, based on identification by said reference pulse train signal, of each scale pulse of said scale pulse train signal, for converting said set rotation angle width to a time width by using the detected spacing time and said unit rotation angle, and for giving the converted time width; operating means, responsive to said scale pulse train signal and said reference pulse train signal, for detecting, based on said identification by said reference pulse train signal of each scale pulse of said scale pulse train signal, each respective spacing time of a plurality of scale pulses predetermined in relation to said given rotation angle position and said set rotation angle width, computing a rotation speed variation value of said rotary machine based on each detected spacing time, and for giving the computed rotation speed variation value; and Correcting means, responsive to the time width from said converting means, the rotation speed variation value from said operating means and said given rotation angle position, for computing, based on said rotation speed variation value and said given rotation angle position, a correcting coefficient for correcting an error between said set rotation angle width and an actual rotation angle width corresponding to said time width, correcting said time width by using said correcting coefficient, and for giving the corrected time width.