A method and arrangement for the determination of the yarn quality and / or coils quality of the running yarn on the basis of the laser doppler anemometry - -

摘要

The invention relates to a method for contactless determine and / or increasing the yarn quality of an advancing yarn (8) or the quality of a coil (20), which are formed by winding up of a continuous thread (8) is obtained, or for the non-contact determining a possible rupture and / or pinching an advancing yarn (8), by means of a winding station (6) on a sensor device arranged to a textile machine, of a light source (1, 2) a laser beam (3) and the latter is produced by means of an optical part - and - means (4) for dividing and steering of the laser beam (3) in at least two partial beams (5a, 5b) is divided, which is subsequently be conducted such that it at the thread (8) meet again, whereby the from the thread (8) reflected light according to the laser doppler anemometry - - - a method of measuring signals are produced, for the determination of the yarn quality of the running thread (8) or of the coils quality are evaluated electronically. The present invention also relates to an arrangement which is suitable for carrying out this method.