Yarnevenness is usually obtained with capacitivesystems evaluating mass per unit length variations. More recently, optical sensors have been proposed. In this paper, we present experimental results of yarnevennessevaluation with an optical measuring system, sensitive to the light absorbed and diffused by a moving yarn. Results obtained with the optical sensor are compared with measurements performed by means of a capacitive commercial tester. Good agreement in measured count variation CV is obtained. Moreover, optical and capacitivemeasurements, simultaneously done on the same thread, allow to obtain a reliable comparison between the two measurement methods, in particular for what concerns yarn signal spectrograms.
|Titolo:||Beyond capacitive systems with optical measurements for yarn evenness evaluation|
|Data di pubblicazione:||2004|
|Appare nelle tipologie:||1.1 Articolo in rivista|