| 摘要 |
PURPOSE:To detect an absolute angle in one turn by using a code detecting element in addition to a code plate which is divided equally into N slits and given 0 or 1 in the respective slits so that all binary-coded values B1-BN forming P continuous slits form different cyclic random number sequences. CONSTITUTION:A P-bit random number code of 1 and 0 is set and this binary- coded value is denoted as B'1. The code value is shifted right by one bit and 0 is added to generate a code value B'2; when B'2not equal to B'1, a (P-1)-bit random code which has 0 added on the left side of the most significant digit bit is generated. Further, the code is shifted right by one bit and 0 is arranged at the most significant digit bit position to obtain a code value B'3; when B'2not equal to B'1 and B'2, 0 is added at the most significant digit bit of the code to generate a (P+2)-bit random code and N-bit random codes are generated similarly. When the code is equal, the code is shifted and 1 is added at the most significant return digit. Thus, the absolute angle is found by P slit detecting elements. |
