Optical monitoring device for thread, particularly for warp thread of weaving machine, has laser beam source for emitting coherent laser beam, where receiver is provided for detecting emitted laser beam and for releasing signal

摘要

The optical monitoring device has a laser beam source (4) for emitting a coherent laser beam. A receiver (6) is provided for detecting the emitted laser beam and for releasing a signal (22). An evaluation device (10) is provided for evaluating the signal released by the receiver. The laser beam is emitted in an area of a thread (20) for monitoring. The receiver receives the laser beams in a deflection area, when the objects arrive in the laser beam.