Serial reading absolute position sensor for e.g. steering wheel of vehicle, has comparing unit comparing outputs of register with table containing values, where each value corresponding to position of detector with respect to pattern

摘要

The sensor (10) has a detector (3) for detecting transitions of a target pattern (1) e.g. Manchester biphase code, on a mobile unit (2) with respect to the detector. A shift register (4) e.g. linear feedback shift register, stores a predetermined number of successive information from the detector. A comparing unit compares outputs (5) of the shift register with respect to a reference table (6) containing predetermined values. Each predetermined value corresponds to a position of the detector with respect to the pattern.