Patent ID: 6554096
Filing Date: 2003-04-29
Classification: B62D,G01L

Abstract:
A torque detecting apparatus comprising for each of an input shaft and an output shaft that are connected with a torsion bar: a rotor; a plurality of targets provided on said rotor so that a region to be detected changes periodically and continuously with rotation of said rotor; and one or a plurality of detecting means for detecting regions of said targets, whereby detecting a torque applied to said input shaft, based on a difference between the regions detected by said detecting means resulting from twist generated on said torsion bar, further comprising:discriminating means for discriminating said targets individually based on the regions detected by said detecting means; correction amount calculating means for calculating a correction amount for each of said targets so as to correct the regions detected by said detecting means, based on maximum values or minimum values of signals indicating the regions of each of said targets detected by said detecting means, upon one rotation of said rotor; storing means for storing the correction amounts calculated by said correction amount calculating means; and correcting means for correcting detected regions upon detection of the regions by said detecting means, based on the correction amounts stored in said storing means for the targets discriminated by said discriminating means; wherein the torque applied to said input shaft is detected based on the regions corrected by said correcting means.