Patent ID: 9041385
Filing Date: 2015-05-26
Classification: G01B,G01D,Y10T

Abstract:
1. A position detecting device for detecting a positional relationship between a first component and a second component, comprising: a marking arrangement which is provided on the first component and has an absolute track and an incremental track, the absolute track having a plurality of absolute markings from which a binary absolute code sequence can be read, and the incremental track having a plurality of incremental markings which are associated with the absolute markings and from which an alternating incremental sequence can be read, and a sensor arrangement which is provided on the second component and is configured to scan the absolute markings and the incremental markings, wherein the absolute code sequence is formed from a first and a second De Bruijn sequence of order N which follow one another, the second De Bruijn sequence being a cyclic shift of the first De Bruijn sequence, in that the first De Bruijn sequence ends with a first subsequence of length N−1 and contains a second subsequence of length N−1 which is identical to the first subsequence and is shifted relative to the first subsequence by an uneven number of places, wherein the second De Bruijn sequence is shifted cyclically relative to the first De Bruijn sequence such that it ends with the second subsequence.