Measurement of velocity with cross-correlation technique for an industrial application

Year: 1986

Authors: Francini F., Longobardi G., Bottos R., Grego F.

Autors Affiliation: Istituto Nazionale di Ottica, Largo Enrico Fermi 6, Firenze, 50125, Italy; Cerimates via Villanova di Sotto, Pordenone, 33170, Italy

Abstract: In the process of continuous spinning it is particulary important the measurement of the velocity of textile fibers: in fact the uniformity, smoothness and tenacity of the yarn depend on the velocity of the fibers at the moment they reach the twisting organ and on the average number of the collected fibers. It is important that the applied tecnique should not affect the flow. An electro-optical system is described for the measurement of the velocity of fibers (20 mm long, 25 jam diameter) suspended in an airflow. The samples are carried along by the surrounding medium in a duct that has two windows (one for lighting, the other for viewing). A cross correlation of the detectors output is carried on to obtain the velocity and density of the fibers.

Conference title:

KeyWords: Electrooptical devices, applications; Fiber optics, appliations; Cross-correlation technique; Velocity measurement, textile fibres

Citations: 4
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