Method for the optoelectronic monitoring of thread-shaped materials

摘要

The invention relates to a method for the optoelectronic monitoring of thread-shaped materials and can preferably be used in the textile industry. It is the object of the invention to evaluate and compensate the attenuations of the light beams that occur due to external influences. The solution according to the invention consists in that the width of the light pulse in the transmitter is varied as a function of the pulse width, the temporal pulse width variation and the variation in pulse width distance of the previously emitted light pulse which the latter experienced upon traversing the link from the transmitter to the receiver and which were determined by evaluating the pulses reaching the receiver. The evaluation can be performed with the aid of a microcomputer. IMAGE