A=D converter with encoding tracked disc - has multiple sensors, on inner and outer tracks, coupled to logic circuit, forming binary coded analogue of shaft angular position

摘要

The digital encoding disc is used to generate coded binary numbers, which represent the angular position of a shaft. It uses a minimum number of tracks and avoids restrictors on sensor spacing. The outer track (2) has a symmetrical patterns with a single sensor per 36 degrees arc. The inner track has (3) sensors per 36 degrees. Logic coupled to the sensors combines the generated signals to form a binary coding with a resolution of 3.6 degrees.