Sensor, e.g. optoelectronic sensor, for detection of moving markings, has time-delay stage for time-delayed impingement of indicator level against excess of threshold value by detection signal over definite time span

摘要

Sensor (8), e.g. optoelectronic sensor, has time-delay stage (12) for time-delayed impingement of indicator level against the excess of threshold value (S1,S2) by detection signal (S) over a definite time span (T). The detection signal is executed as a characteristic of the markings (6) representing a signal, e.g. as contrast signal.