KAITENKEIZETSUTAICHIKENSHUTSUKIOMOCHIITAZETSUTAIICHIKENSHUTSUHOHO

摘要

PURPOSE:To accurately measure the rotation amount of an input shaft, by dividing the change range of the output value of a first absolute value detector into a definite number of zones while correcting the output value of a second absolute value detector to a value originally to be taken on the basis of the zone where the output value of the first absolute value detector is positioned. CONSTITUTION:A first resolver 10 is directly connected to an input shaft 11 while a second resolver 12 is connected thereto through a speed reducing mechanism 13 and the output value L of a first detector 18 takes a round between 0-1999 during one rotation of the input shaft 11 and the output value U of a second detector 19 changes at every four. A computer 21 judges either one of zones 0-3 where the output value L of the detector 18 is positioned to set a zone number to a register I and performs operation of Ur=A+I to judge whether the output value U of the detector 19 is same to a value originally to be tanken or shifted one from said value. When the input shaft 11 performs one rotation or more, discrimination is successively performed while 4 is added to the content of A. An absolute rotation amount is operated on the basis of the value of the value Ur to be taken, the output value L of the detector 18 and the zone number I to be displayed by a display device 26.